{"pageNumber":"1517","pageRowStart":"37900","pageSize":"25","recordCount":40828,"records":[{"id":70011389,"text":"70011389 - 1983 - Relationship of two lacustrine ostracode species to solute composition and salinity: Implications for paleohydrochemistry ( Limnocythere sappaensis/staplini)","interactions":[],"lastModifiedDate":"2024-01-31T01:31:48.095816","indexId":"70011389","displayToPublicDate":"1983-01-01T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1796,"text":"Geology","active":true,"publicationSubtype":{"id":10}},"title":"Relationship of two lacustrine ostracode species to solute composition and salinity: Implications for paleohydrochemistry ( Limnocythere sappaensis/staplini)","docAbstract":"<div id=\"15567849\" class=\"article-section-wrapper js-article-section js-content-section  \" data-section-parent-id=\"0\"><p>Nonmarine ostracode species are indicative of the physical and chemical nature of lacustrine environments. Although salinity has traditionally been regarded as one of the more important parameters that affect the occurrence patterns of lacustrine ostracodes, examination of the solute composition and salinities of the lakes where<span>&nbsp;</span><i>Limnocythere sappaensis</i><span>&nbsp;</span>and<span>&nbsp;</span><i>L. staplini</i><span>&nbsp;</span>live reveals that solute composition and not salinity is the most critical factor that controls their occurrence. The occurrence of these taxa in the modern world is mutually exclusive.<span>&nbsp;</span><i>L. sappaensis</i><span>&nbsp;</span>lives in water that is enriched in Na<sup>+</sup>-HCO<sub>3</sub><sup>−</sup>-<img class=\"content-image\" src=\"https://pubs.geoscienceworld.org/gsa/geology/article/11/8/435/203527/[XSLTMediumImagePath]\" alt=\"graphic\" data-mce-src=\"https://pubs.geoscienceworld.org/gsa/geology/article/11/8/435/203527/[XSLTMediumImagePath]\"><span>&nbsp;</span>and depleted in Ca<sup>2+</sup>.<span>&nbsp;</span><i>L. staplini</i><span>&nbsp;</span>lives in water that is enriched in various combinations of Na<sup>+</sup>-Mg<sup>2+</sup>-Ca<sup>2+</sup>-<img class=\"content-image\" src=\"https://pubs.geoscienceworld.org/gsa/geology/article/11/8/435/203527/[XSLTMediumImagePath]\" alt=\"graphic\" data-mce-src=\"https://pubs.geoscienceworld.org/gsa/geology/article/11/8/435/203527/[XSLTMediumImagePath]\">-Cl<sup>−</sup><span>&nbsp;</span>and is depleted in HCO<sub>3</sub>. These solute compositions are the product of the mineral fractionation processes described by Eugster and Hardie. The positive correlation between these two species occurrences and the mineralogic fractionation processes suggests that these taxa may be used as reliable paleohydrochemical indicators. Studies in progress dealing with other ostracode taxa suggest that saline lacustrine ostracodes can provide a precise method for reconstructing paleohydrochemistry.</p></div>","language":"English","publisher":"Geological Society of America","doi":"10.1130/0091-7613(1983)11<435:ROTLOS>2.0.CO;2","issn":"00917613","usgsCitation":"Forester, R.M., 1983, Relationship of two lacustrine ostracode species to solute composition and salinity: Implications for paleohydrochemistry ( Limnocythere sappaensis/staplini): Geology, v. 11, no. 8, p. 435-438, https://doi.org/10.1130/0091-7613(1983)11<435:ROTLOS>2.0.CO;2.","productDescription":"4 p.","startPage":"435","endPage":"438","numberOfPages":"4","costCenters":[],"links":[{"id":221585,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"11","issue":"8","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"50e4a77ee4b0e8fec6cdc4a8","contributors":{"authors":[{"text":"Forester, R. M.","contributorId":76332,"corporation":false,"usgs":true,"family":"Forester","given":"R.","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":360984,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70011391,"text":"70011391 - 1983 - Modeling of self-potential anomalies near vertical dikes","interactions":[],"lastModifiedDate":"2024-04-18T16:29:04.733014","indexId":"70011391","displayToPublicDate":"1983-01-01T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1808,"text":"Geophysics","active":true,"publicationSubtype":{"id":10}},"title":"Modeling of self-potential anomalies near vertical dikes","docAbstract":"<p><span>The self-potential (SP) Green's function for an outcropping vertical dike is derived from solutions for the dc resistivity problem for the same geometry. The Green's functions are numerically integrated over rectangular source regions on the contacts between the dike and the surrounding material to obtain the SP anomaly. The analysis is valid for thermoelectrical source mechanisms. Two types of anomalies can be produced by this geometry. When the two source planes are polarized in opposite directions, a monopolar anomaly is produced. This corresponds to the thermoelectrical properties of the dike being in contrast with the surrounding material. When the thermoelectric coefficients change monotonically across the dike, a dipolar anomaly is produced. In either case positive and negative anomalies are possible, and the greatest variation in potential will occur in the most resistive regions. Examples of the effect of changing different model parameters are given for sources that have constant intensity throughout the rectangular source regions. For these patch models the depth to the top of the source region is approximately equal to the distance between the minimum (or maximum) of the anomaly outside of the dike and the edge of the dike. Field data collected over a hot intrusive fissure are presented which have been modeled by the technique described.</span></p>","language":"English","publisher":"Society of Exploration Geophysicists","doi":"10.1190/1.1441456","issn":"00168033","usgsCitation":"Fitterman, D., 1983, Modeling of self-potential anomalies near vertical dikes: Geophysics, v. 48, no. 2, p. 171-180, https://doi.org/10.1190/1.1441456.","productDescription":"10 p.","startPage":"171","endPage":"180","numberOfPages":"10","costCenters":[],"links":[{"id":221587,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"48","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a5c19e4b0c8380cd6fa23","contributors":{"authors":[{"text":"Fitterman, D.V. 0000-0001-5600-3401","orcid":"https://orcid.org/0000-0001-5600-3401","contributorId":70386,"corporation":false,"usgs":true,"family":"Fitterman","given":"D.V.","email":"","affiliations":[],"preferred":false,"id":360987,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70011272,"text":"70011272 - 1983 - The use of MAGSAT data to determine secular variation","interactions":[],"lastModifiedDate":"2024-06-28T16:51:26.602642","indexId":"70011272","displayToPublicDate":"1983-01-01T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":6453,"text":"Journal of Geophysical Research Solid Earth","active":true,"publicationSubtype":{"id":10}},"title":"The use of MAGSAT data to determine secular variation","docAbstract":"<p><span>A combined spatial and secular variation model of the geomagnetic field, labeled M061581, is derived from a selection of Magsat data. Secular variation (SV) data computed from linear fits to midnight hourly values from 19 magnetic observatories were also included in the analysis but were seen to have little effect on the model. The SV patterns from this new model are compared with those from the 1980 IGRF and with those for 1970 computed by the DGRF and with the 1960 patterns computed using the GSFC(12/66) model. Most of the features of the M061581 are identical in location and level with those of the 1980 IGRF. Together they confirm that the reversals in sign of field change seen over Asia and North America between 1965 and 1975 are reverting to the pre-1965 states. The M061581 model gives −32 nT/yr for the dipole decay rate, larger than the 70% increase already reported since 1965. This abnormally high value is interpreted as being a defect of the model because it appears to result from a much larger (−100 nT/yr) drop in field over the polar regions not indicated by the 1980 IGRF. This north polar decrease is shown to be of external origin as the result of a combination of the seasonal effect of the north polar ionospheric (counterclockwise) afternoon&nbsp;</span><i>Sq<sup>p</sup></i><span>&nbsp;cell increasing in intensity from the beginning (November 1979) to the end (June 1980) of the Magsat data collection period, coupled with an enhancement of its effect as the orbit lowered from the 350– 550 km initial altitudes to near 200 km just prior to burnup. This experiment indicates that secular variation can be obtained from satellite data for intervals of less than a full year if corrections can be made for seasonal effects and that ‘annual snapshots’ of the field by a satellite would allow easy and accurate models of secular change without the use of any surface data.</span></p>","language":"English","publisher":"American Geophysical Union","doi":"10.1029/JB088iB07p05903","issn":"01480227","usgsCitation":"Cain, J., Frayser, J., Muth, L., and Schmitz, D., 1983, The use of MAGSAT data to determine secular variation: Journal of Geophysical Research Solid Earth, v. 88, no. B7, p. 5903-5910, https://doi.org/10.1029/JB088iB07p05903.","productDescription":"8 p.","startPage":"5903","endPage":"5910","numberOfPages":"8","costCenters":[],"links":[{"id":220893,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"88","issue":"B7","noUsgsAuthors":false,"publicationDate":"2012-09-20","publicationStatus":"PW","scienceBaseUri":"505bb15be4b08c986b3252eb","contributors":{"authors":[{"text":"Cain, J.C.","contributorId":68457,"corporation":false,"usgs":true,"family":"Cain","given":"J.C.","email":"","affiliations":[],"preferred":false,"id":360720,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Frayser, J.","contributorId":83665,"corporation":false,"usgs":true,"family":"Frayser","given":"J.","affiliations":[],"preferred":false,"id":360721,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Muth, L.","contributorId":10035,"corporation":false,"usgs":true,"family":"Muth","given":"L.","email":"","affiliations":[],"preferred":false,"id":360718,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Schmitz, D.","contributorId":45832,"corporation":false,"usgs":true,"family":"Schmitz","given":"D.","email":"","affiliations":[],"preferred":false,"id":360719,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70011267,"text":"70011267 - 1983 - Major and trace elements in Mahogany zone oil shale in two cores from the Green River Formation, piceance basin, Colorado","interactions":[],"lastModifiedDate":"2012-03-12T17:18:27","indexId":"70011267","displayToPublicDate":"1983-01-01T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Major and trace elements in Mahogany zone oil shale in two cores from the Green River Formation, piceance basin, Colorado","docAbstract":"The Parachute Creek Member of the lacustrine Green River Formation contains thick sequences of rich oil-shale. The richest sequence and the richest oil-shale bed occurring in the member are called the Mahogany zone and the Mahogany bed, respectively, and were deposited in ancient Lake Uinta. The name \"Mahogany\" is derived from the red-brown color imparted to the rock by its rich-kerogen content. Geochemical abundance and distribution of eight major and 18 trace elements were determined in the Mahogany zone sampled from two cores, U. S. Geological Survey core hole CR-2 and U. S. Bureau of Mines core hole O1-A (Figure 1). The oil shale from core hole CR-2 was deposited nearer the margin of Lake Uinta than oil shale from core hole O1-A. The major- and trace-element chemistry of the Mahogany zone from each of these two cores is compared using elemental abundances and Q-mode factor modeling. The results of chemical analyses of 44 CR-2 Mahogany samples and 76 O1-A Mahogany samples are summarized in Figure 2. The average geochemical abundances for shale (1) and black shale (2) are also plotted on Figure 2 for comparison. The elemental abundances in the samples from the two cores are similar for the majority of elements. Differences at the 95% probability level are higher concentrations of Ca, Cu, La, Ni, Sc and Zr in the samples from core hole CR-2 compared to samples from core hole O1-A and higher concentrations of As and Sr in samples from core hole O1-A compared to samples from core hole CR-2. These differences presumably reflect slight differences in depositional conditions or source material at the two sites. The Mahogany oil shale from the two cores has lower concentrations of most trace metals and higher concentrations of carbonate-related elements (Ca, Mg, Sr and Na) compared to the average shale and black shale. During deposition of the Mahogany oil shale, large quantities of carbonates were precipitated resulting in the enrichment of carbonate-related elements and dilution of most trace elements as pointed out in several previous studies. Q-mode factor modeling is a statistical method used to group samples on the basis of compositional similarities. Factor end-member samples are chosen by the model. All other sample compositions are represented by varying proportions of the factor end-members and grouped as to their highest proportion. The compositional similarities defined by the Q-mode model are helpful in understanding processes controlling multi-element distributions. The models for each core are essentially identical. A four-factor model explains 70% of the variance in the CR-2 data and 64% of the O1-A data (the average correlation coefficients are 0. 84 and 0. 80, respectively). Increasing the number of factors above 4 results in the addition of unique instead of common factors. Table I groups the elements based on high factor-loading scores (the amount of influence each element has in defining the model factors). Similar elemental associations are found in both cores. Elemental abundances are plotted as a function of core depth using a five-point weighted moving average of the original data to smooth the curve (Figure 3 and 4). The plots are grouped according to the four factors defined by the Q-mode models and show similar distributions for elements within the same factor. Factor 1 samples are rich in most trace metals. High oil yield and the presence of illite characterize the end-member samples for this factor (3, 4) suggesting that adsorption of metals onto clay particles or organic matter is controlling the distribution of the metals. Precipitation of some metals as sulfides is possible (5). Factor 2 samples are high in elements commonly associated with minerals of detrital or volcanogenic origin. Altered tuff beds and lenses are prevalent within the Mahogany zone. The CR-2 end-member samples for this factor contain analcime (3) which is an alteration product within the tuff beds of the Green River Formation. Th","largerWorkTitle":"Preprints Symposia","language":"English","issn":"05693799","usgsCitation":"Tuttle, M.L., Dean, W., and Parduhn, N.L., 1983, Major and trace elements in Mahogany zone oil shale in two cores from the Green River Formation, piceance basin, Colorado, <i>in</i> Preprints Symposia, v. 28, no. 1, p. 85-90.","startPage":"85","endPage":"90","numberOfPages":"6","costCenters":[],"links":[{"id":220827,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"28","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a4c0ae4b0c8380cd69972","contributors":{"authors":[{"text":"Tuttle, M. L.","contributorId":71992,"corporation":false,"usgs":true,"family":"Tuttle","given":"M.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":360707,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Dean, W.E.","contributorId":97099,"corporation":false,"usgs":true,"family":"Dean","given":"W.E.","email":"","affiliations":[],"preferred":false,"id":360708,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Parduhn, N. L.","contributorId":69136,"corporation":false,"usgs":true,"family":"Parduhn","given":"N.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":360706,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70010304,"text":"70010304 - 1983 - Stability of streams and lakes on Mars","interactions":[],"lastModifiedDate":"2024-02-16T12:20:34.967206","indexId":"70010304","displayToPublicDate":"1983-01-01T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1963,"text":"Icarus","active":true,"publicationSubtype":{"id":10}},"title":"Stability of streams and lakes on Mars","docAbstract":"<div id=\"preview-section-abstract\"><div id=\"abstracts\" class=\"Abstracts u-font-serif text-s\"><div id=\"aep-abstract-id3\" class=\"abstract author\"><div id=\"aep-abstract-sec-id4\"><p>Under present climatic conditions streams and lakes on Mars will freeze. Freezing is slow and would have a negligible effect in impeding flow of the large floods that are believed to have eroded the outflow channels. Valley networks are more difficult to form under current climatic conditions since they appear to have formed by slow erosion by streams of modest discharges. Freezing of small Martian streams was modeled for a variety of climatic conditions on the supposition that the Martian atmosphere may have been considerably thicker in the past when the valley networks formed. The modeling involves examination of the energy balance at the upper and lower surfaces of ice on streams to determine the rate at which the ice thickens with time. The results indicate that freezing rates are not strongly dependent on atmospheric pressure. With no wind, increasing the pressure by a factor of 10 cuts the time taken to freeze solid only by about a factor of about 2. Under windy conditions dependence on atmospheric pressure is even weaker. The distance that water could travel in a stream before flow is arrested by freezing is also calculated. The distances depend on the initial temperature of the stream and when icings develop, but in general, if a stream deeper than 2 m can be initiated and sustained, the water within it can survive long enough to cut most of the valley networks observed. The main problem with forming the valley is initiating the flow. Groundwater seepage alone appears inadequate because of the difficulty of recharging the groundwater system. Melting of ice precipitated onto the surface following injection of water into the atmosphere by large impacts is a possible source of water, but the climatic conditions under which the ice could melt and the water be collected into streams that can survive long enough to cut the valley is uncertain.</p></div></div></div></div><div id=\"preview-section-introduction\"><br></div><div id=\"preview-section-snippets\"><br></div><div id=\"preview-section-references\"><br></div>","language":"English","publisher":"Elsevier","doi":"10.1016/0019-1035(83)90168-9","issn":"00191035","usgsCitation":"Carr, M.H., 1983, Stability of streams and lakes on Mars: Icarus, v. 56, no. 3, p. 476-495, https://doi.org/10.1016/0019-1035(83)90168-9.","productDescription":"20 p.","startPage":"476","endPage":"495","numberOfPages":"20","costCenters":[],"links":[{"id":219443,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"56","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b965ce4b08c986b31b46d","contributors":{"authors":[{"text":"Carr, M. H.","contributorId":84727,"corporation":false,"usgs":true,"family":"Carr","given":"M.","email":"","middleInitial":"H.","affiliations":[{"id":131,"text":"Astrogeology Science Center","active":true,"usgs":true}],"preferred":false,"id":358584,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70011258,"text":"70011258 - 1983 - Mechanical and chemical compaction in fine-grained shallow-water limestones","interactions":[],"lastModifiedDate":"2024-05-21T23:40:46.645777","indexId":"70011258","displayToPublicDate":"1983-01-01T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2450,"text":"Journal of Sedimentary Petrology","active":true,"publicationSubtype":{"id":10}},"title":"Mechanical and chemical compaction in fine-grained shallow-water limestones","docAbstract":"<div><div id=\"12458796\" class=\"article-section-wrapper js-article-section js-content-section  \" data-section-parent-id=\"0\"><p>Artificial compaction of in-situ cores of sediments resulted in: 1) reduction of sediment thickness by 50 percent and more; 2) reduction of initial porosities of 65 to 75 percent to 35 to 45 percent; 3) creation of megascopic textures almost identical to many ancient lime mud- and wackestone; 4) creation of organic, wispy \"stylolite-like\" layers; 5) chemical compaction, evidenced by thin sections showing quartz grains piercing mollusc shells without causing fractures and SEM evidence of solutional interfitting of 1 to 4-mu m-size aragonitic carbonate grains; 6) obliteration of pellets and birdseye or fenestral voids in those sediments where early cementation was lacking; obliteration of identifiable marine grasses and vertical \"root\" tube voids; 8) mashing of sediment-filled circular burrows to produce ellipsoidal structures. Significant mechanical compaction resulted from pressures simulating less than 1,000 ft of burial. Increasing loads to more than 10,000 ft did not significantly increase compaction. Chemical compaction was detected only in cores compacted to pressures greater than 10,000 ft of burial. These experiments suggest that chemical compaction would begin at much shallower depths given geologic time. Experiments that caused chemical compaction lend support to the hypothesis that cement required to produce a low-porosity/low-permeability fine-grained limestone is derived internally. Dissolution, ion diffusion, and reprecipitation are the most likely processes for creating significant thicknesses of dense limestones. Continuation of chemical compaction after significant porosity reduction necessitates expulsion of connate fluids, possibly including hydrocarbons.--Modified journal abstract.</p></div></div>","language":"English","publisher":"SEPM","doi":"10.1306/212F8242-2B24-11D7-8648000102C1865D","issn":"00224472","usgsCitation":"Shinn, E., and Robbin, D., 1983, Mechanical and chemical compaction in fine-grained shallow-water limestones: Journal of Sedimentary Petrology, v. 53, no. 2, p. 595-618, https://doi.org/10.1306/212F8242-2B24-11D7-8648000102C1865D.","productDescription":"24 p.","startPage":"595","endPage":"618","numberOfPages":"24","costCenters":[],"links":[{"id":220695,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"53","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a5357e4b0c8380cd6c9f7","contributors":{"authors":[{"text":"Shinn, E.A.","contributorId":38610,"corporation":false,"usgs":true,"family":"Shinn","given":"E.A.","email":"","affiliations":[],"preferred":false,"id":360677,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Robbin, D.M.","contributorId":101384,"corporation":false,"usgs":true,"family":"Robbin","given":"D.M.","affiliations":[],"preferred":false,"id":360678,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70011397,"text":"70011397 - 1983 - Atomic-absorption determination of mercury in geological materials by flame and carbon-rod atomisation after solvent extraction and using co-extracted silver as a matrix modifier","interactions":[],"lastModifiedDate":"2025-09-29T15:38:44.163539","indexId":"70011397","displayToPublicDate":"1983-01-01T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3541,"text":"The Analyst","active":true,"publicationSubtype":{"id":10}},"title":"Atomic-absorption determination of mercury in geological materials by flame and carbon-rod atomisation after solvent extraction and using co-extracted silver as a matrix modifier","docAbstract":"Based on modifications and expansion of the original Tindall's solvent extraction flame atomic-absorption procedure, an atomic-absorption spectrophotometric method has been developed for the determination of mercury in geological materials. The sample is digested with nitric and hydrochloric acids in a boiling water-bath. The solution is made ammoniacal and potassium iodide and silver nitrate are added. The mercury is extracted into isobutyl methyl ketone as the tetraiodomercurate(ll). Added silver is co-extracted with mercury and serves as a matrix modifier in the carbon-rod atomiser. The mercury in the isobutyl methyl ketone extract may be determined by either the flame- or the carbon-rod atomisation method, depending on the concentration level. The limits of determination are 0.05-10 p.p.m. of mercury for the carbon-rod atomisation and 1 -200 p.p.m. of mercury for the flame atomisation. Mercury values for reference samples obtained by replicate analyses are in good agreement with those reported by other workers, with relative standard deviations ranging from 2.3 to 0.9%. Recoveries of mercury spiked at two levels were 93-106%. Major and trace elements commonly found in geological materials do not interfere.","language":"English","publisher":"Royal Society of Chemistry","doi":"10.1039/AN9830800058","issn":"00032654","usgsCitation":"Sanzolone, R.F., and Chao, T.T., 1983, Atomic-absorption determination of mercury in geological materials by flame and carbon-rod atomisation after solvent extraction and using co-extracted silver as a matrix modifier: The Analyst, v. 108, no. 1282, p. 58-63, https://doi.org/10.1039/AN9830800058.","productDescription":"6 p.","startPage":"58","endPage":"63","numberOfPages":"6","costCenters":[],"links":[{"id":221665,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"108","issue":"1282","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059eec9e4b0c8380cd49f6f","contributors":{"authors":[{"text":"Sanzolone, R. F.","contributorId":64199,"corporation":false,"usgs":true,"family":"Sanzolone","given":"R.","middleInitial":"F.","affiliations":[],"preferred":false,"id":360998,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Chao, T. T.","contributorId":31900,"corporation":false,"usgs":true,"family":"Chao","given":"T.","email":"","middleInitial":"T.","affiliations":[],"preferred":false,"id":360997,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70011257,"text":"70011257 - 1983 - Paleohydraulic reconstruction of flash- flood peaks from boulder deposits in the Colorado Front Range","interactions":[],"lastModifiedDate":"2024-01-03T12:32:31.770285","indexId":"70011257","displayToPublicDate":"1983-01-01T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1786,"text":"Geological Society of America Bulletin","active":true,"publicationSubtype":{"id":10}},"title":"Paleohydraulic reconstruction of flash- flood peaks from boulder deposits in the Colorado Front Range","docAbstract":"<div id=\"15191396\" class=\"article-section-wrapper js-article-section js-content-section  \" data-section-parent-id=\"0\"><p>Nine watersheds in the Colorado Front Range with steep bedrock channels were used to test the accuracy of paleohydraulic reconstruction of large flash floods using boulder deposits. The nine basins consist of eight small ungauged basins ranging in size from 1.6 to 29 km<sup>2</sup><span>&nbsp;</span>and the Big Thompson River at the mouth of the Big Thompson Canyon, draining 790 km<sup>2</sup>. Between 1923 and 1976, all nine basins had had one catastrophic flash flood, the magnitude of which has been estimated by the conventional slope-area method.</p><p>In each basin, coarse boulder deposits of the large flash floods were identified, and three axes of the five largest boulders were measured, along with at least two profiles of the valley cross section. A simple arithmetic average of two theoretical and two empirical relationships was used to estimate average flood velocity using boulder size and shape. Average depth was estimated as the arithmetic average of four values computed from the Manning equation, a regression equation for boulder size and unit stream power, a relative smoothness equation, and a modified Shields' relationship. The appropriate flood width for the estimated average depth was found by iteration, using the valley cross sections.</p><p>The paleohydraulic discharges thus computed generally underestimate conventional slope-area discharge estimates on small streams by as much as 75%, although the average amount is only 28% too low, and the reconstructed discharge in one stream was 31% too large. The Big Thompson River flood of 1976 was overestimated by 76%. Reasons for discrepancy in reconstructed peaks could include (1) the possibility that floods may have been able to move boulders larger than those available to be moved; (2) overestimation of the slope-area discharge because high-water marks were set prior to erosion of the channel; (3) underestimation of original roughness coefficients; and (4) macroturbulent effects during fast, deep flows.</p><p>The paleohydraulic technique is applied to two other streams in Colorado with sedimentological evidence of large flash floods, but no conventional indirect discharge estimates. A small tributary to the Big Thompson River draining 1.8 km<sup>2</sup><span>&nbsp;</span>has a paleohydraulic reconstructed flood peak of about 60 m<sup>3</sup>/s from a flood in 1976. Using boulders excavated from a foundation site in Holocene alluvium along Boulder Creek in Boulder, Colorado, a paleohydraulic reconstructed flood peak of between 860 and 1,512 m<sup>3</sup>/s is calculated. This is 1.4 to 2.4 times the magnitude of the estimated 500-yr flood.</p></div>","language":"English","publisher":"Geological Society of America","doi":"10.1130/0016-7606(1983)94<986:PROFPF>2.0.CO;2","usgsCitation":"Costa, J.E., 1983, Paleohydraulic reconstruction of flash- flood peaks from boulder deposits in the Colorado Front Range: Geological Society of America Bulletin, v. 94, no. 8, p. 986-1004, https://doi.org/10.1130/0016-7606(1983)94<986:PROFPF>2.0.CO;2.","productDescription":"19 p.","startPage":"986","endPage":"1004","numberOfPages":"19","costCenters":[],"links":[{"id":220694,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"94","issue":"8","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a73f4e4b0c8380cd7734b","contributors":{"authors":[{"text":"Costa, J. E.","contributorId":28977,"corporation":false,"usgs":true,"family":"Costa","given":"J.","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":360676,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70011580,"text":"70011580 - 1983 - Nd and Sr isotopic studies on cenozoic mafic lavas from West Antarctica: Another source for continental alkali basalts","interactions":[],"lastModifiedDate":"2012-03-12T17:18:30","indexId":"70011580","displayToPublicDate":"1983-01-01T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1336,"text":"Contributions to Mineralogy and Petrology","active":true,"publicationSubtype":{"id":10}},"title":"Nd and Sr isotopic studies on cenozoic mafic lavas from West Antarctica: Another source for continental alkali basalts","docAbstract":"The Nd and Sr isotopic ratios on a suite of continental alkali basalts from Marie Byrd Land, West Antarctica, define a change in the source over the range of K/Ar dates between 1 and 28 m.y. ago. The 87Sr/86Sr isotopic ratios (0.7026 to 0.7031) are unusually low for continental alkali basalts, although the corresponding 143Nd/144Nd ratios (0.51283 to 0.51299) are similar to previously reported values. On a 87Sr/86Sr vs. 143Nd/144Nd diagram, they define a trend on the low 87Sr/86Sr side of the \"mantle array\", which has a slope steeper than the mantle array. An explanation for the light rare earth elements (LREE) enrichment of the alkali basalts, with high 143Nd/144Nd ratios and low 87Sr/86Sr ratios, is suggested by a model which modifies the source region with a mantle-derived, CO2-enriched metasomatic fluid. ?? 1983 Springer-Verlag.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Contributions to Mineralogy and Petrology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisherLocation":"Springer-Verlag","doi":"10.1007/BF00373077","issn":"00107999","usgsCitation":"Futa, K., and Le Masurier, W., 1983, Nd and Sr isotopic studies on cenozoic mafic lavas from West Antarctica: Another source for continental alkali basalts: Contributions to Mineralogy and Petrology, v. 83, no. 1-2, p. 38-44, https://doi.org/10.1007/BF00373077.","startPage":"38","endPage":"44","numberOfPages":"7","costCenters":[],"links":[{"id":221451,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":205123,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/BF00373077"}],"volume":"83","issue":"1-2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a63c2e4b0c8380cd72688","contributors":{"authors":[{"text":"Futa, K.","contributorId":26435,"corporation":false,"usgs":true,"family":"Futa","given":"K.","affiliations":[],"preferred":false,"id":361454,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Le Masurier, W.E.","contributorId":45053,"corporation":false,"usgs":true,"family":"Le Masurier","given":"W.E.","email":"","affiliations":[],"preferred":false,"id":361455,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70011644,"text":"70011644 - 1983 - Development of reaction models for ground-water systems","interactions":[],"lastModifiedDate":"2024-03-19T15:54:47.28244","indexId":"70011644","displayToPublicDate":"1983-01-01T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1759,"text":"Geochimica et Cosmochimica Acta","active":true,"publicationSubtype":{"id":10}},"title":"Development of reaction models for ground-water systems","docAbstract":"<p><span>Methods are described for developing geochemical reaction models from the observed chemical compositions of ground water along a hydrologic flow path. The roles of thermodynamic speciation programs, mass balance calculations, and reaction-path simulations in developing and testing reaction models are contrasted. Electron transfer is included in the mass balance equations to properly account for redox reactions in ground water. The mass balance calculations determine net mass transfer models which must be checked against the thermodynamic calculations of speciation and reaction-path programs. Although reaction-path simulations of ground-water chemistry are thermodynamically valid, they must be checked against the net mass transfer defined by the mass balance calculations. An example is given testing multiple reaction hypotheses along a flow path in the Floridan aquifer where several reaction models are eliminated. Use of carbon and sulfur isotopic data with mass balance calculations indicates a net reaction of incongruent dissolution of dolomite (dolomite dissolution with calcite precipitation) driven irreversibly by gypsum dissolution, accompanied by minor sulfate reduction, ferric hydroxide dissolution, and pyrite precipitation in central Florida. Along the flow path, the aquifer appears to be open to CO</span><sub>2</sub><span>&nbsp;initially, and open to organic carbon at more distant points down gradient.</span></p>","language":"English","publisher":"Elsevier","doi":"10.1016/0016-7037(83)90102-3","issn":"00167037","usgsCitation":"Plummer, N., Parkhurst, D., and Thorstenson, D., 1983, Development of reaction models for ground-water systems: Geochimica et Cosmochimica Acta, v. 47, no. 4, p. 665-685, https://doi.org/10.1016/0016-7037(83)90102-3.","productDescription":"21 p.","startPage":"665","endPage":"685","numberOfPages":"21","costCenters":[],"links":[{"id":221377,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"47","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0060e4b0c8380cd4f71d","contributors":{"authors":[{"text":"Plummer, Niel 0000-0002-4020-1013 nplummer@usgs.gov","orcid":"https://orcid.org/0000-0002-4020-1013","contributorId":190100,"corporation":false,"usgs":true,"family":"Plummer","given":"Niel","email":"nplummer@usgs.gov","affiliations":[{"id":436,"text":"National Research Program - Eastern Branch","active":true,"usgs":true}],"preferred":true,"id":361610,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Parkhurst, D.L.","contributorId":12474,"corporation":false,"usgs":true,"family":"Parkhurst","given":"D.L.","email":"","affiliations":[],"preferred":false,"id":361608,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Thorstenson, D.C.","contributorId":47377,"corporation":false,"usgs":true,"family":"Thorstenson","given":"D.C.","email":"","affiliations":[],"preferred":false,"id":361609,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70011238,"text":"70011238 - 1983 - CHEMICAL STRUCTURES IN COAL: GEOCHEMICAL EVIDENCE FOR THE PRESENCE OF MIXED STRUCTURAL COMPONENTS.","interactions":[],"lastModifiedDate":"2012-03-12T17:18:31","indexId":"70011238","displayToPublicDate":"1983-01-01T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"CHEMICAL STRUCTURES IN COAL: GEOCHEMICAL EVIDENCE FOR THE PRESENCE OF MIXED STRUCTURAL COMPONENTS.","docAbstract":"The purpose of this paper is to summarize work on the chemical structural components of coal, comparing them with their possible plant precursors in modern peat. Solid-state **1**3C nuclear magnetic resonance (NMR), infrared spectroscopy (IR), elemental analysis and, in some cases, individual compound analyses formed the bases for these comparisons.","conferenceTitle":"Proceedings - 1983 International Conference on Coal Science.","conferenceLocation":"Pittsburgh, PA, USA","language":"English","usgsCitation":"Hatcher, P.G., Breger, I.A., Maciel, G., and Szeverenyi, N., 1983, CHEMICAL STRUCTURES IN COAL: GEOCHEMICAL EVIDENCE FOR THE PRESENCE OF MIXED STRUCTURAL COMPONENTS., Proceedings - 1983 International Conference on Coal Science., Pittsburgh, PA, USA, p. 310-313.","startPage":"310","endPage":"313","numberOfPages":"4","costCenters":[],"links":[{"id":221159,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f2cde4b0c8380cd4b3ad","contributors":{"authors":[{"text":"Hatcher, Patrick G.","contributorId":93625,"corporation":false,"usgs":true,"family":"Hatcher","given":"Patrick","email":"","middleInitial":"G.","affiliations":[],"preferred":false,"id":360639,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Breger, Irving A.","contributorId":65205,"corporation":false,"usgs":true,"family":"Breger","given":"Irving","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":360637,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Maciel, G.E.","contributorId":43910,"corporation":false,"usgs":true,"family":"Maciel","given":"G.E.","email":"","affiliations":[],"preferred":false,"id":360636,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Szeverenyi, N.M.","contributorId":83663,"corporation":false,"usgs":true,"family":"Szeverenyi","given":"N.M.","email":"","affiliations":[],"preferred":false,"id":360638,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70011995,"text":"70011995 - 1983 - The relationship of acquisition systems to automated stereo correlation.","interactions":[],"lastModifiedDate":"2012-03-12T17:18:34","indexId":"70011995","displayToPublicDate":"1983-01-01T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3052,"text":"Photogrammetric Engineering and Remote Sensing","active":true,"publicationSubtype":{"id":10}},"title":"The relationship of acquisition systems to automated stereo correlation.","docAbstract":"Today a concerted effort is being made to expedite the mapping process through automated correlation of stereo data. Stereo correlation involves the comparison of radiance (brightness) signals or patterns recorded by sensors. Conventionally, two-dimensional area correlation is utilized but this is a rather slow and cumbersome procedure. Digital correlation can be performed in only one dimension where suitable signal patterns exist, and the one-dimensional mode is much faster. Electro-optical (EO) systems, suitable for space use, also have much greater flexibility than film systems. Thus, an EO space system can be designed which will optimize one-dimensional stereo correlation and lead toward the automation of topographic mapping.-from Author","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Photogrammetric Engineering and Remote Sensing","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","usgsCitation":"Colvocoresses, A., 1983, The relationship of acquisition systems to automated stereo correlation.: Photogrammetric Engineering and Remote Sensing, v. 49, no. 4, p. 539-544.","startPage":"539","endPage":"544","numberOfPages":"6","costCenters":[],"links":[{"id":220804,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"49","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505baf21e4b08c986b324582","contributors":{"authors":[{"text":"Colvocoresses, A. P.","contributorId":82703,"corporation":false,"usgs":true,"family":"Colvocoresses","given":"A. P.","affiliations":[],"preferred":false,"id":362468,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70011179,"text":"70011179 - 1983 - Diatom evidence on Wisconsin and Holocene events in the Bering Sea","interactions":[],"lastModifiedDate":"2013-01-26T15:49:27","indexId":"70011179","displayToPublicDate":"1983-01-01T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3218,"text":"Quaternary Research","active":true,"publicationSubtype":{"id":10}},"title":"Diatom evidence on Wisconsin and Holocene events in the Bering Sea","docAbstract":"Previous work on surface (modern) sediments has defined diatom species which appear to be good indicators of various oceanographic/ecologic conditions in the North Pacific Ocean and marginal seas. Three long cores from the eastern and northern sides of the Aleutian Basin show changes in species assemblage which can be interpreted in terms of changes in the ocean environment during the last glaciation (Wisconsin) and the Holocene. The early and late Wisconsin maxima were times of prolonged annual sea-ice cover and a short cool period of phytoplankton productivity during the ice-free season. The middle Wisconsin interstade, at least in the southern Bering Sea, had greater seasonal contrast than today, with some winter sea-ice cover, an intensified temperature minimum, and high spring productivity. Variations in clastic and reworked fossil material imply varying degrees of transport to the basin by Alaskan rivers. The results of Jouse?? from the central Bering Sea generally correspond with those presented here, although there are problems with direct comparison. ?? 1983.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Quaternary Research","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Elsevier","publisherLocation":"Amsterdam, Netherlands","doi":"10.1016/0033-5894(83)90079-0","issn":"00335894","usgsCitation":"Sancetta, C., and Robinson, S., 1983, Diatom evidence on Wisconsin and Holocene events in the Bering Sea: Quaternary Research, v. 20, no. 2, p. 232-245, https://doi.org/10.1016/0033-5894(83)90079-0.","startPage":"232","endPage":"245","numberOfPages":"14","costCenters":[],"links":[{"id":266557,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/0033-5894(83)90079-0"},{"id":221277,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"20","issue":"2","noUsgsAuthors":false,"publicationDate":"2017-01-20","publicationStatus":"PW","scienceBaseUri":"505a00abe4b0c8380cd4f859","contributors":{"authors":[{"text":"Sancetta, C.","contributorId":14951,"corporation":false,"usgs":true,"family":"Sancetta","given":"C.","affiliations":[],"preferred":false,"id":360466,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Robinson, S.W.","contributorId":30985,"corporation":false,"usgs":true,"family":"Robinson","given":"S.W.","email":"","affiliations":[],"preferred":false,"id":360467,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70011993,"text":"70011993 - 1983 - Crustal and upper mantle structure of the northern and central Sierra Nevada","interactions":[],"lastModifiedDate":"2024-06-28T16:16:42.34482","indexId":"70011993","displayToPublicDate":"1983-01-01T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":6453,"text":"Journal of Geophysical Research Solid Earth","active":true,"publicationSubtype":{"id":10}},"title":"Crustal and upper mantle structure of the northern and central Sierra Nevada","docAbstract":"<p><span>Teleseismic data were recorded within the Sierra Nevada to look for lateral variations in the upper mantle. The data were collected at both temporary and permanent stations, and&nbsp;</span><i>P</i><span>&nbsp;wave residuals were computed. After correcting the&nbsp;</span><i>P</i><span>&nbsp;residual data for crustal and topographic effects, there is still a variation of as much as 0.5-0.6 s from the north end of the Sierra Nevada to Mono Lake, located east of the central part of the range. In addition, there are significant variations in travel time patterns, depending on the azimuth of wave arrivals. Two simple modeling approaches have been used to infer the upper mantle velocity structure from the observed variations in travel time. In the first, it is assumed that the velocity variations are distributed throughout a depth range of about 60–160 km. One model that fits the data indicates a north-to-south trend in upper mantle&nbsp;</span><i>P</i><span>&nbsp;velocities from about 7.9 km/s at the north end of the Sierra to 7.6 km/s near Mono Lake. Superimposed is a west-to-east trend from 7.85 km/s under the Sierra Nevada crest to 7.7 km/s east of Lake Tahoe. In the second modeling approach, a fixed velocity contrast is assumed between the lithosphere and asthenosphere with variations in travel time resulting from variations in lithospheric thickness. One model, consistent with the observations, indicates a thinning of the lithosphere from 110 km at the north end of the Sierra to 60 km near Mono Lake.</span></p>","language":"English","publisher":"American Geophysical Union","doi":"10.1029/JB088iB07p05874","issn":"01480227","usgsCitation":"Mavko, B., and Thompson, G.A., 1983, Crustal and upper mantle structure of the northern and central Sierra Nevada: Journal of Geophysical Research Solid Earth, v. 88, no. B7, p. 5874-5892, https://doi.org/10.1029/JB088iB07p05874.","productDescription":"19 p.","startPage":"5874","endPage":"5892","numberOfPages":"19","costCenters":[],"links":[{"id":220802,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"88","issue":"B7","noUsgsAuthors":false,"publicationDate":"2012-09-20","publicationStatus":"PW","scienceBaseUri":"5059fcd8e4b0c8380cd4e472","contributors":{"authors":[{"text":"Mavko, B.B.","contributorId":11331,"corporation":false,"usgs":true,"family":"Mavko","given":"B.B.","email":"","affiliations":[],"preferred":false,"id":362465,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Thompson, G. A.","contributorId":90332,"corporation":false,"usgs":true,"family":"Thompson","given":"G.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":362466,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70011417,"text":"70011417 - 1983 - Simulation of solute transport in a mountain pool-and-riffle stream: A transient storage model","interactions":[],"lastModifiedDate":"2018-02-07T13:43:16","indexId":"70011417","displayToPublicDate":"1983-01-01T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3722,"text":"Water Resources Research","onlineIssn":"1944-7973","printIssn":"0043-1397","active":true,"publicationSubtype":{"id":10}},"title":"Simulation of solute transport in a mountain pool-and-riffle stream: A transient storage model","docAbstract":"<p><span>The physical characteristics of mountain streams differ from the uniform and conceptually well- defined open channels for which the analysis of solute transport has been oriented in the past and is now well understood. These physical conditions significantly influence solute transport behavior, as demonstrated by a transient storage model simulation of solute transport in a very small (0.0125 m</span><sup>3</sup><span>s</span><sup>−1</sup><span>) mountain pool-and-riffle stream. The application is to a carefully controlled and intensively monitored chloride injection experiment. The data from the experiment are not explained by the standard convection-dispersion mechanisms alone. A transient storage model, which couples dead zones with the one-dimensional convection-dispersion equation, simulates the general characteristics of the solute transport behavior and a set of simulation parameters were determined that yield an adequate fit to the data. However, considerable uncertainty remains in determining physically realistic values of these parameters. The values of the simulation parameters used are compared to values used by other authors for other streams. The comparison supports, at least qualitatively, the determined parameter values.</span></p>","language":"English","publisher":"American Geophysical Union","doi":"10.1029/WR019i003p00718","usgsCitation":"Bencala, K.E., and Walters, R.A., 1983, Simulation of solute transport in a mountain pool-and-riffle stream: A transient storage model: Water Resources Research, v. 19, no. 3, p. 718-724, https://doi.org/10.1029/WR019i003p00718.","productDescription":"7 p.","startPage":"718","endPage":"724","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":220904,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"19","issue":"3","noUsgsAuthors":false,"publicationDate":"2010-07-09","publicationStatus":"PW","scienceBaseUri":"505b9084e4b08c986b319558","contributors":{"authors":[{"text":"Bencala, Kenneth E. kbencala@usgs.gov","contributorId":1541,"corporation":false,"usgs":true,"family":"Bencala","given":"Kenneth","email":"kbencala@usgs.gov","middleInitial":"E.","affiliations":[],"preferred":true,"id":361036,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Walters, Roy A.","contributorId":74877,"corporation":false,"usgs":true,"family":"Walters","given":"Roy","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":361035,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70011254,"text":"70011254 - 1983 - Kinetic analysis of strontium and potassium sorption onto sands and gravels in a natural channel","interactions":[],"lastModifiedDate":"2020-01-26T09:40:18","indexId":"70011254","displayToPublicDate":"1983-01-01T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3722,"text":"Water Resources Research","onlineIssn":"1944-7973","printIssn":"0043-1397","active":true,"publicationSubtype":{"id":10}},"title":"Kinetic analysis of strontium and potassium sorption onto sands and gravels in a natural channel","docAbstract":"<p><span>A kinetic, first-order mass transfer model was used to describe the sorption of strontium onto sand- and gravel-sized streambed sediments. Rate parameters, empirically determined for strontium, allowed for the prediction of potassium sorption with moderate success. The model parameters varied significantly with particle size. The sorption data were collected during an experimental injection of several elements into a small mountain pool-and-riffle stream. The sorption process onto sand- and gravel-sized sediment was relatively slow compared to changes in the dissolved concentrations.</span></p>","language":"English","publisher":"American Geophysical Union","doi":"10.1029/WR019i003p00725","usgsCitation":"Bencala, K.E., Jackman, A.P., Kennedy, V.C., Avanzino, R.J., and Zellweger, G.W., 1983, Kinetic analysis of strontium and potassium sorption onto sands and gravels in a natural channel: Water Resources Research, v. 19, no. 3, p. 725-731, https://doi.org/10.1029/WR019i003p00725.","productDescription":"7 p.","startPage":"725","endPage":"731","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":221743,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"19","issue":"3","noUsgsAuthors":false,"publicationDate":"2010-07-09","publicationStatus":"PW","scienceBaseUri":"505a40a3e4b0c8380cd64f07","contributors":{"authors":[{"text":"Bencala, Kenneth E. kbencala@usgs.gov","contributorId":1541,"corporation":false,"usgs":true,"family":"Bencala","given":"Kenneth","email":"kbencala@usgs.gov","middleInitial":"E.","affiliations":[],"preferred":true,"id":360671,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Jackman, Alan P.","contributorId":28239,"corporation":false,"usgs":true,"family":"Jackman","given":"Alan","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":360669,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Kennedy, Vance C.","contributorId":102063,"corporation":false,"usgs":true,"family":"Kennedy","given":"Vance","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":360668,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Avanzino, Ronald J.","contributorId":24355,"corporation":false,"usgs":true,"family":"Avanzino","given":"Ronald","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":360667,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Zellweger, Gary W.","contributorId":71171,"corporation":false,"usgs":true,"family":"Zellweger","given":"Gary","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":360670,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70011253,"text":"70011253 - 1983 - INTERACTIVE NAME PLACEMENT FOR PROVISIONAL MAPS.","interactions":[],"lastModifiedDate":"2012-03-12T17:19:08","indexId":"70011253","displayToPublicDate":"1983-01-01T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"INTERACTIVE NAME PLACEMENT FOR PROVISIONAL MAPS.","docAbstract":"Computer generation and placement of map type has been refined into a production mode at Mid-Continent Mapping Center (MCMC) for USGS 1:24,000- and 1:25,000-scale Provisional maps. The map collar program is written in FORTRAN using batch processing that allows the program to work in the background.","largerWorkTitle":"Technical Papers of the American Congress of Surveying and Mapping","conferenceTitle":"Technical Papers of the 43rd Annual Meeting of the American Congress on Surveying and Mapping.","conferenceLocation":"Washington, DC, USA","language":"English","publisher":"American Congress on Surveying & Mapping","publisherLocation":"Falls Church, VA, USA","usgsCitation":"Goldberg, J.L., and Miller, T.C., 1983, INTERACTIVE NAME PLACEMENT FOR PROVISIONAL MAPS., <i>in</i> Technical Papers of the American Congress of Surveying and Mapping, Washington, DC, USA, p. 314-321.","startPage":"314","endPage":"321","numberOfPages":"8","costCenters":[],"links":[{"id":221742,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a37d0e4b0c8380cd611b7","contributors":{"authors":[{"text":"Goldberg, Jeffrey L.","contributorId":59947,"corporation":false,"usgs":true,"family":"Goldberg","given":"Jeffrey","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":360666,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Miller, Thomas C.","contributorId":13752,"corporation":false,"usgs":true,"family":"Miller","given":"Thomas","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":360665,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70011249,"text":"70011249 - 1983 - VARIATIONS IN MINERAL MATTER CONTENT OF A PEAT DEPOSIT IN MAINE RESTING ON GLACIO-MARINE SEDIMENTS.","interactions":[],"lastModifiedDate":"2012-03-12T17:18:29","indexId":"70011249","displayToPublicDate":"1983-01-01T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"VARIATIONS IN MINERAL MATTER CONTENT OF A PEAT DEPOSIT IN MAINE RESTING ON GLACIO-MARINE SEDIMENTS.","docAbstract":"The Great Heath, Washington County, Maine, is an excellent example of a multidomed ombrotrophic peatland resting on a gently undulating surface of glacio-marine sediments and towering above modern streams. A comprehensive study sponsored by the Geological Survey of Maine in cooperation with the U. S. Geological Survey included preparation of a contoured surficial geology map on which are located 81 core sites. Eight cross sections accompany the map showing occurrence and thickness of three types of organic material and locations of cored sample analyses. Refs.","largerWorkTitle":"Los Alamos National Laboratory (Report) LA","conferenceTitle":"Mineral Matter in Peat: Its Occurrence, Form, and Distribution.","conferenceLocation":"Los Alamos, NM, USA","language":"English","usgsCitation":"Cameron, C., and Schruben, P., 1983, VARIATIONS IN MINERAL MATTER CONTENT OF A PEAT DEPOSIT IN MAINE RESTING ON GLACIO-MARINE SEDIMENTS., <i>in</i> Los Alamos National Laboratory (Report) LA, Los Alamos, NM, USA, p. 63-76.","startPage":"63","endPage":"76","numberOfPages":"14","costCenters":[],"links":[{"id":221515,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bc0e5e4b08c986b32a3a0","contributors":{"authors":[{"text":"Cameron, Cornelia C.","contributorId":103002,"corporation":false,"usgs":true,"family":"Cameron","given":"Cornelia C.","affiliations":[],"preferred":false,"id":360660,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Schruben, Paul","contributorId":30249,"corporation":false,"usgs":true,"family":"Schruben","given":"Paul","email":"","affiliations":[],"preferred":false,"id":360659,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70011196,"text":"70011196 - 1983 - Quaternary geology of the Rhode Island inner shelf","interactions":[],"lastModifiedDate":"2017-09-14T15:01:12","indexId":"70011196","displayToPublicDate":"1983-01-01T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2667,"text":"Marine Geology","active":true,"publicationSubtype":{"id":10}},"title":"Quaternary geology of the Rhode Island inner shelf","docAbstract":"Five sedimentary units and three erosional unconformities identified in high-resolution seismic-reflection profiles reveal the stratigraphic framework and Quaternary history of the inner continental shelf south of Narragansett Bay, Rhode Island. Late Tertiary to early Pleistocene rivers eroded the pre-Mesozoic bedrock and the Upper Cretaceous to lower Tertiary coastal plain and continental shelf strata to form a lowland and cuesta having a north-facing escarpment. The lowland and landward flanks of the cuesta were modified by glaciers during Pleistocene time and subsequently were overlain by drift and end moraine deposits of the late Wisconsinan ice advance. During deglaciation, freshwater lakes formed between the retreating ice and end moraines. Prior to sea-level rise, the drift and older deposits were cut by streams flowing south and southwestward toward Block Island Sound. As sea level rose, postglacial valleys were partly filled by fluvial, freshwater-peat, estuarine and salt-marsh deposits. Transgressing seas eroded the sea floor, exposing bedrock and coastal plain outcrops, and deposited marine sediments. ?? 1983.","language":"English","publisher":"Elsevier","doi":"10.1016/0025-3227(83)90033-6","issn":"00253227","usgsCitation":"Needell, S., O’Hara, C.J., and Knebel, H., 1983, Quaternary geology of the Rhode Island inner shelf: Marine Geology, v. 53, no. 1-2, p. 41-53, https://doi.org/10.1016/0025-3227(83)90033-6.","productDescription":"13 p.","startPage":"41","endPage":"53","costCenters":[{"id":678,"text":"Woods Hole Coastal and Marine Science Center","active":true,"usgs":true}],"links":[{"id":221574,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Rhode Island","otherGeospatial":"Narragansett Bay","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -71.51275634765625,\n              41.410805789669816\n            ],\n            [\n              -71.11450195312499,\n              41.410805789669816\n            ],\n            [\n              -71.11450195312499,\n              41.84808170729204\n            ],\n            [\n              -71.51275634765625,\n              41.84808170729204\n            ],\n            [\n              -71.51275634765625,\n              41.410805789669816\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"53","issue":"1-2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a92c9e4b0c8380cd80a4b","contributors":{"authors":[{"text":"Needell, S. W.","contributorId":36938,"corporation":false,"usgs":true,"family":"Needell","given":"S. W.","affiliations":[],"preferred":false,"id":360513,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"O’Hara, C. J.","contributorId":32938,"corporation":false,"usgs":true,"family":"O’Hara","given":"C.","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":360512,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Knebel, H.J.","contributorId":79092,"corporation":false,"usgs":true,"family":"Knebel","given":"H.J.","affiliations":[],"preferred":false,"id":360514,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70011197,"text":"70011197 - 1983 - Scoresum - A technique for displaying and evaluating multi-element geochemical information, with examples of its use in regional mineral assessment programs","interactions":[],"lastModifiedDate":"2025-03-07T16:52:51.250953","indexId":"70011197","displayToPublicDate":"1983-01-01T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2302,"text":"Journal of Geochemical Exploration","active":true,"publicationSubtype":{"id":10}},"title":"Scoresum - A technique for displaying and evaluating multi-element geochemical information, with examples of its use in regional mineral assessment programs","docAbstract":"<div class=\"u-margin-s-bottom\">A technique called SCORESUM was developed to display a maximum of multi-element geochemical information on a minimum number of maps for mineral assessment purposes. The technique can be done manually for a small analytical data set or can be done with a computer for a large data set. SCORESUM can be used with highly censored data and can also weight samples so as to minimize the chemical differences of diverse lithologies in different parts of a given study area.</div><div class=\"u-margin-s-bottom\">The full range of reported analyses for each element of interest in a data set is divided into four categories. Anomaly scores — values of O (background), 1 (weakly anomalous), 2 (moderately anomalous), and 3 (strongly anomalous) — are substituted for all of the analyses falling into each of the four categories. A group of elements based on known or suspected association in altered or mineralized areas is selected for study and the anomaly scores for these elements are summed for each sample site and then plotted on a map. Some of the results of geochemical studies conducted for mineral assessments in two areas are briefly described. The first area, the Mokelumne Wilderness and vicinity, is a relatively small and geologically simple one. The second, the Walker Lake 1° × 2° quadrangle, is a large area that has extremely complex geology and that contains a number of different mineral deposit environments. These two studies provide examples of how the SCORESUM technique has been used (1) to enhance relatively small but anomalous areas and (2) to delineate and rank areas containing geochemical signatures for specific suites of elements related to certain types of alteration or mineralization.</div>","language":"English","publisher":"Elsevier","doi":"10.1016/0375-6742(83)90031-6","issn":"03756742","usgsCitation":"Chaffee, M., 1983, Scoresum - A technique for displaying and evaluating multi-element geochemical information, with examples of its use in regional mineral assessment programs: Journal of Geochemical Exploration, v. 19, no. 1-3, p. 361-381, https://doi.org/10.1016/0375-6742(83)90031-6.","productDescription":"21 p.","startPage":"361","endPage":"381","numberOfPages":"21","costCenters":[],"links":[{"id":221575,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"19","issue":"1-3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b879de4b08c986b316592","contributors":{"authors":[{"text":"Chaffee, M.A.","contributorId":108049,"corporation":false,"usgs":true,"family":"Chaffee","given":"M.A.","affiliations":[],"preferred":false,"id":360515,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70011198,"text":"70011198 - 1983 - Conjunctive use of groundwater and surface water for irrigated agriculture: Risk aversion","interactions":[],"lastModifiedDate":"2018-02-07T13:41:14","indexId":"70011198","displayToPublicDate":"1983-01-01T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3722,"text":"Water Resources Research","onlineIssn":"1944-7973","printIssn":"0043-1397","active":true,"publicationSubtype":{"id":10}},"title":"Conjunctive use of groundwater and surface water for irrigated agriculture: Risk aversion","docAbstract":"<p><span>In examining the South Platte system in Colorado where surface water and groundwater are used conjunctively for irrigation, we find the actual installed well capacity is approximately sufficient to irrigate the entire area. This would appear to be an overinvestment in well capacity. In this paper we examine to what extent groundwater is being developed as insurance against periods of low streamflow. Using a simulation model which couples the hydrology of a conjunctive stream aquifer system to a behavioral-economic model which incorporates farmer behavior in such a system, we have investigated the economics of an area patterned after a reach of the South Platte Valley in Colorado. The results suggest that under current economic conditions the most reasonable groundwater pumping capacity is a total capacity capable of irrigating the available acreage with groundwater. Installing sufficient well capacity to irrigate all available acreage has two benefits: (1) this capacity maximizes the expected net benefits and (2) this capacity also minimizes the variation in annual income: it reduces the variance to essentially zero. As pumping capacity is installed in a conjunctive use system, the value of flow forecasts is diminished. Poor forecasts are compensated for by pumping groundwater.</span></p>","language":"English","publisher":"American Geophysical Union","doi":"10.1029/WR019i005p01111","usgsCitation":"Bredehoeft, J.D., and Young, R.A., 1983, Conjunctive use of groundwater and surface water for irrigated agriculture: Risk aversion: Water Resources Research, v. 19, no. 5, p. 1111-1121, https://doi.org/10.1029/WR019i005p01111.","productDescription":"11 p.","startPage":"1111","endPage":"1121","costCenters":[],"links":[{"id":221576,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Colorado","otherGeospatial":"South Platte River","volume":"19","issue":"5","noUsgsAuthors":false,"publicationDate":"2010-07-09","publicationStatus":"PW","scienceBaseUri":"5059f9c7e4b0c8380cd4d794","contributors":{"authors":[{"text":"Bredehoeft, John D.","contributorId":86747,"corporation":false,"usgs":true,"family":"Bredehoeft","given":"John","email":"","middleInitial":"D.","affiliations":[],"preferred":false,"id":360516,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Young, Richard A.","contributorId":38975,"corporation":false,"usgs":true,"family":"Young","given":"Richard","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":360517,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70012115,"text":"70012115 - 1983 - Comparison of rapid methods for chemical analysis of milligram samples of ultrafine clays","interactions":[],"lastModifiedDate":"2018-01-26T17:53:31","indexId":"70012115","displayToPublicDate":"1983-01-01T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1245,"text":"Clays and Clay Minerals","onlineIssn":"1552-8367","printIssn":"0009-8604","active":true,"publicationSubtype":{"id":10}},"title":"Comparison of rapid methods for chemical analysis of milligram samples of ultrafine clays","docAbstract":"<p><span>Two rapid methods for the decomposition and chemical analysis of clays were adapted for use with 20–40-mg size samples, typical amounts of ultrafine products (≤0.5-µm diameter) obtained by modern separation methods for clay minerals. The results of these methods were compared with those of “classical” rock analyses. The two methods consisted of mixed lithium metaborate fusion and heated decomposition with HF in a closed vessel. The latter technique was modified to include subsequent evaporation with concentrated H</span><sub>2</sub><span>SO</span><sub>4</sub><span><span>&nbsp;</span>and re-solution in HCl, which reduced the interference of the fluoride ion in the determination of Al, Fe, Ca, Mg, Na, and K. Results from the two methods agree sufficiently well with those of the “classical” techniques to minimize error in the calculation of clay mineral structural formulae. Representative maximum variations, in atoms per unit formula of the smectite type based on 22 negative charges, are 0.09 for Si, 0.03 for Al, 0.015 for Fe, 0.07 for Mg, 0.03 for Na, and 0.01 for K.</span></p>","language":"English","publisher":"The Clay Minerals Society","doi":"10.1346/CCMN.1983.0310605","usgsCitation":"Rettig, S., Marinenko, J., Khoury, H.N., and Jones, B., 1983, Comparison of rapid methods for chemical analysis of milligram samples of ultrafine clays: Clays and Clay Minerals, v. 31, no. 6, p. 440-446, https://doi.org/10.1346/CCMN.1983.0310605.","productDescription":"7 p.","startPage":"440","endPage":"446","costCenters":[],"links":[{"id":222053,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"31","issue":"6","noUsgsAuthors":false,"publicationDate":"2024-04-02","publicationStatus":"PW","scienceBaseUri":"5059f887e4b0c8380cd4d176","contributors":{"authors":[{"text":"Rettig, S.L.","contributorId":42592,"corporation":false,"usgs":true,"family":"Rettig","given":"S.L.","email":"","affiliations":[],"preferred":false,"id":362767,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Marinenko, J.W.","contributorId":75558,"corporation":false,"usgs":true,"family":"Marinenko","given":"J.W.","email":"","affiliations":[],"preferred":false,"id":362769,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Khoury, Hani N.","contributorId":17765,"corporation":false,"usgs":false,"family":"Khoury","given":"Hani","email":"","middleInitial":"N.","affiliations":[],"preferred":false,"id":362766,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Jones, B.F.","contributorId":52156,"corporation":false,"usgs":true,"family":"Jones","given":"B.F.","email":"","affiliations":[],"preferred":false,"id":362768,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70012053,"text":"70012053 - 1983 - DETERMINATION OF MODE OF OCCURRENCE OF TRACE ELEMENTS IN THE UPPER FREEPORT COAL BED USING SIZE AND DENSITY SEPARATION PROCEDURES.","interactions":[],"lastModifiedDate":"2012-03-12T17:18:44","indexId":"70012053","displayToPublicDate":"1983-01-01T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"DETERMINATION OF MODE OF OCCURRENCE OF TRACE ELEMENTS IN THE UPPER FREEPORT COAL BED USING SIZE AND DENSITY SEPARATION PROCEDURES.","docAbstract":"A procedure has been developed using low temperature ashing, followed by size and sink-float separation of the ash, X-ray diffraction analysis, and instrumental neutron activation analysis to give both qualitative and quantitative information for major, minor and trace minerals and their associated trace elements in coal.","conferenceTitle":"Proceedings - 1983 International Conference on Coal Science.","conferenceLocation":"Pittsburgh, PA, USA","language":"English","usgsCitation":"Palmer, C., and Filby, R., 1983, DETERMINATION OF MODE OF OCCURRENCE OF TRACE ELEMENTS IN THE UPPER FREEPORT COAL BED USING SIZE AND DENSITY SEPARATION PROCEDURES., Proceedings - 1983 International Conference on Coal Science., Pittsburgh, PA, USA, p. 365-368.","startPage":"365","endPage":"368","numberOfPages":"4","costCenters":[],"links":[{"id":222760,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059fd43e4b0c8380cd4e71d","contributors":{"authors":[{"text":"Palmer, C.A.","contributorId":81894,"corporation":false,"usgs":true,"family":"Palmer","given":"C.A.","email":"","affiliations":[],"preferred":false,"id":362622,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Filby, R.H.","contributorId":26071,"corporation":false,"usgs":true,"family":"Filby","given":"R.H.","email":"","affiliations":[],"preferred":false,"id":362621,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70011200,"text":"70011200 - 1983 - 40Ar/39Ar and U-Th-Pb dating of separated clasts from the Abee E4 chondrite","interactions":[],"lastModifiedDate":"2023-12-10T22:05:45.297428","indexId":"70011200","displayToPublicDate":"1983-01-01T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1427,"text":"Earth and Planetary Science Letters","active":true,"publicationSubtype":{"id":10}},"title":"40Ar/39Ar and U-Th-Pb dating of separated clasts from the Abee E4 chondrite","docAbstract":"<div id=\"abstracts\" class=\"Abstracts u-font-serif text-s\"><div id=\"ab1\" class=\"abstract author\" lang=\"en\"><div id=\"aep-abstract-sec-id4\"><p>Determinations of<sup>40</sup>Ar/<sup>39</sup>Ar and U-Th-Pb are reported for three clasts from the Abee (E4) enstatite chondrite, which has been the object of extensive consortium investigations. The clasts give<sup>40</sup>Ar/<sup>39</sup>Ar plateau ages and/or maximum ages of 4.5 Gy, whereas two of the clasts give average ages of 4.4 Gy. Within the range of 4.4–4.5 Gy these data do not resolve any possible age differences among the three clasts.<sup>206</sup>Pb measured in these clasts is only ∼1.5–2.5% radiogenic, which leads to relatively large uncertainties in the Pb isochron age and in the<sup>207</sup>Pb/<sup>206</sup>Pb model ages. The Pb data indicate that the initial<sup>207</sup>Pb/<sup>206</sup>Pb was no more than 0.08±0.07% higher than this ratio in Can˜on Diablo troilite. The U-Th-Pb data are consistent with the interpretation that initial formation of these clasts occurred 4.58 Gy ago and that the clasts have since remained closed systems, but are contaminated with terrestrial Pb. The<sup>40</sup>Ar/<sup>39</sup>Ar ages could be gas retention ages after clast formation or impact degassing ages. The thermal history of Abee deduced from Ar data appears consistent with that deduced from magnetic data, and suggests that various Abee components experienced separate histories until brecciation no later than 4.4 Gy ago, and experienced no appreciable subsequent heating.</p></div></div></div><ul id=\"issue-navigation\" class=\"issue-navigation u-margin-s-bottom u-bg-grey1\"></ul>","language":"English","publisher":"Elsevier","doi":"10.1016/0012-821X(83)90077-8","issn":"0012821X","usgsCitation":"Bogard, D., Unruh, D., and Tatsumoto, M., 1983, 40Ar/39Ar and U-Th-Pb dating of separated clasts from the Abee E4 chondrite: Earth and Planetary Science Letters, v. 62, no. 1, p. 132-146, https://doi.org/10.1016/0012-821X(83)90077-8.","productDescription":"15 p.","startPage":"132","endPage":"146","numberOfPages":"15","costCenters":[],"links":[{"id":221649,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"62","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059e264e4b0c8380cd45b3e","contributors":{"authors":[{"text":"Bogard, D.D.","contributorId":15762,"corporation":false,"usgs":true,"family":"Bogard","given":"D.D.","email":"","affiliations":[],"preferred":false,"id":360521,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Unruh, D.M.","contributorId":8498,"corporation":false,"usgs":true,"family":"Unruh","given":"D.M.","email":"","affiliations":[],"preferred":false,"id":360520,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Tatsumoto, M.","contributorId":76798,"corporation":false,"usgs":true,"family":"Tatsumoto","given":"M.","email":"","affiliations":[],"preferred":false,"id":360522,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70010314,"text":"70010314 - 1983 - Sulphide mineralization and wall-rock alteration in ophiolites and modern oceanic spreading centres","interactions":[],"lastModifiedDate":"2025-03-07T16:55:04.92366","indexId":"70010314","displayToPublicDate":"1983-01-01T00:00:00","publicationYear":"1983","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2302,"text":"Journal of Geochemical Exploration","active":true,"publicationSubtype":{"id":10}},"title":"Sulphide mineralization and wall-rock alteration in ophiolites and modern oceanic spreading centres","docAbstract":"<p>No abstract available.</p>","language":"English","publisher":"Elsevier","doi":"10.1016/0375-6742(83)90041-9","issn":"03756742","usgsCitation":"Koski, R., 1983, Sulphide mineralization and wall-rock alteration in ophiolites and modern oceanic spreading centres: Journal of Geochemical Exploration, v. 19, no. 1-3, p. 496-498, https://doi.org/10.1016/0375-6742(83)90041-9.","productDescription":"3 p.","startPage":"496","endPage":"498","numberOfPages":"3","costCenters":[],"links":[{"id":219678,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"19","issue":"1-3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b9de9e4b08c986b31db8e","contributors":{"authors":[{"text":"Koski, R.A.","contributorId":16006,"corporation":false,"usgs":true,"family":"Koski","given":"R.A.","email":"","affiliations":[],"preferred":false,"id":358615,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
]}