The Gibbs energies of mixing for NaCl-KCl binary solids and liquids and solid-saturated NaCl-KCl-H2O ternary liquids were modeled using asymmetric Margules treatments. The coefficients of the expressions were calibrated using an extensive array of binary solvus and solidus data, and both binary and ternary liquidus data. Over the PTX range considered, the system exhibits complete liquid miscibility among all three components and extensive solid solution along the anhydrous binary. Solid-liquid and solid-solid phase equilibria were calculated by using the resulting equations and invoking the equality of chemical potentials of NaCl and KCl between appropriate phases at equilibrium. The equations reproduce the ternary liquidus and predict activity coefficients for NaCl and KCl components in the aqueous liquid under solid-saturation conditions between 673 and 1200 K from vapor saturation up to 5 kbar. In the NaCl-KCl anhydrous binary system, the equations describe phase equilibria and predict activity coefficients of the salt components for all stable compositions of solid and liquid phases between room temperature and 1200 K and from 1 bar to 5 kbar.
","language":"English","publisher":"Elsevier","doi":"10.1016/0016-7037(92)90190-T","issn":"00167037","usgsCitation":"Sterner, S., Chou, I., Downs, R., and Pitzer, K.S., 1992, Phase relations in the system NaCl-KCl-H2O: V. Thermodynamic-PTX analysis of solid-liquid equilibria at high temperatures and pressures: Geochimica et Cosmochimica Acta, v. 56, no. 6, p. 2295-2309, https://doi.org/10.1016/0016-7037(92)90190-T.","productDescription":"15 p.","startPage":"2295","endPage":"2309","numberOfPages":"15","costCenters":[],"links":[{"id":224830,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"56","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a7882e4b0c8380cd786fd","contributors":{"authors":[{"text":"Sterner, S.M.","contributorId":49526,"corporation":false,"usgs":true,"family":"Sterner","given":"S.M.","email":"","affiliations":[],"preferred":false,"id":375856,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Chou, I.-M. 0000-0001-5233-6479","orcid":"https://orcid.org/0000-0001-5233-6479","contributorId":44283,"corporation":false,"usgs":true,"family":"Chou","given":"I.-M.","affiliations":[{"id":245,"text":"Eastern Mineral and Environmental Resources Science Center","active":true,"usgs":true}],"preferred":false,"id":375855,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Downs, R.T.","contributorId":93635,"corporation":false,"usgs":true,"family":"Downs","given":"R.T.","email":"","affiliations":[],"preferred":false,"id":375857,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Pitzer, Kenneth S.","contributorId":94435,"corporation":false,"usgs":true,"family":"Pitzer","given":"Kenneth","email":"","middleInitial":"S.","affiliations":[],"preferred":false,"id":375858,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70017244,"text":"70017244 - 1992 - Methodology for rapid assessment of the radon potential of soils","interactions":[],"lastModifiedDate":"2012-03-12T17:18:48","indexId":"70017244","displayToPublicDate":"1992-01-01T00:00:00","publicationYear":"1992","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Methodology for rapid assessment of the radon potential of soils","docAbstract":"A technique using a small diameter probe and a portable alpha-particle scintillometer for sample collection and analysis has been developed. It is fast, efficient, cost-effective, and can be modified to accommodate a wide spectrum of sampling conditions. When soil-gas sampling for radon is combined with geophysical gamma-ray measurements, pedological characteristics of surficial materials, and geologic knowledge of bedrock, the combination forms a powerful technological basis for estimating radon potential of soils. The method can help provide information on a short time-frame so that local governments, land developers, and builders can take appropriate measures when planning new construction.","largerWorkTitle":"Journal of Radioanalytical and Nuclear Chemistry","language":"English","doi":"10.1007/BF02040484","issn":"02365731","usgsCitation":"Reimer, G., 1992, Methodology for rapid assessment of the radon potential of soils, in Journal of Radioanalytical and Nuclear Chemistry, v. 161, no. 2, p. 377-387, https://doi.org/10.1007/BF02040484.","startPage":"377","endPage":"387","numberOfPages":"11","costCenters":[],"links":[{"id":205573,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/BF02040484"},{"id":224925,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"161","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a5574e4b0c8380cd6d1fb","contributors":{"authors":[{"text":"Reimer, G.M.","contributorId":59800,"corporation":false,"usgs":true,"family":"Reimer","given":"G.M.","affiliations":[],"preferred":false,"id":375875,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70017247,"text":"70017247 - 1992 - Laser microprobe analyses of Cl, Br, I, and K in fluid inclusions: Implications for sources of salinity in some ancient hydrothermal fluids","interactions":[],"lastModifiedDate":"2017-06-05T11:00:42","indexId":"70017247","displayToPublicDate":"1992-01-01T00:00:00","publicationYear":"1992","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":"Laser microprobe analyses of Cl, Br, I, and K in fluid inclusions: Implications for sources of salinity in some ancient hydrothermal fluids","docAbstract":"The relative concentrations of Cl, Br, I, and K in fluid inclusions in hydrothermal minerals were measured by laser microprobe noble gas mass spectrometry on irradiated samples containing 10−10 to 10−8 L of fluid. Distinctive halogen signatures indicate contrasting sources of fluid salinity in fluid inclusions from representative “magmatic” (St. Austell), “metamorphic” (Alleghany), and “geothermal” (Creede, Salton Sea) aqueous systems. Br/Cl mol ratios are lowest at Salton Sea (0.27–0.33 × 10−3), where high salinities are largely due to halite dissolution; intermediate at St. Austell (0.85 × 10−3), possibly representative of magmatic volatiles; and highest (near that of seawater) at Creede (1.5–2.1 × 10−3) and Alleghany (1.2–2.4 × 10−3), where dissolved halogens probably were leached from volcanic and (or) nonevaporitic sedimentary rocks.
Horizontal and vertical thermal maturity patterns and time-temperature modeling of Cretaceous and Tertiary rocks in the San Juan Basin of southwestern Colorado and northwestern New Mexico indicate that the high levels of thermal maturity in the northern part of the basin are due to either (1) convective heat transfer associated with a deeply buried heat source located directly below the northern part of the basin or (2) the circulation of relatively hot fluids into the basin from a heat source north of the basin located near the San Juan Mountains. Vitrinite-reflectance (Rm) well profiles through Cretaceous and Tertiary rocks in the basin are commonly nonlinear, with two to four segments having different gradients. The different gradients most likely represent the combined effects of contrasting thermal conductivities associated with lithologic variations and differences in heat transfer processes (conductive versus convective). Time-temperature and kinetic modeling of nonlinear Rm profiles indicates that present-day heat flow is insufficient to account for the measured levels of thermal maturity. Furthermore, in order to match the nonlinear Rm profiles, it is necessary to assign artificially high thermal-conductivity values to some of the stratigraphic units. These unrealistically high thermal conductivities are interpreted as evidence of convective heat transfer.
Multi-incidence-angle (in the 25° to 55° range) radar data acquired by the NASA/JPL Airborne Synthetic Aperture Radar (AIRSAR) at three wavelengths simultaneously and displayed at three polarizations are examined for their utility in characterizing lava flows at Pisgah volcanic field, California. Pisgah lava flows were erupted in three phases; flow textures consist of hummocky pahoehoe, smooth pahoehoe, and aa (with and without thin sedimentary cover). Of the eight AIRSAR images used here, four were calibrated to within an accuracy of ±2 dB with trihedral corner reflectors, and data from these calibrations were used to process the additional images to a conservatively estimated ±5 dB level of accuracy. Calibrated radar backscatter data (σ°, in dB) were plotted as a function of incidence angle at three wavelengths (P-band, 68 cm; L-band, 24 cm; and C-band, 5.6 cm) and three polarizations (HH, horizontal transmit/horizontal receive; HV, horizontal transmit/vertical receive; and VV, vertical transmit/vertical receive) for eight major units at Pisgah for which multi-incidence-angle AIRSAR data were available. The eight units consist of near-vent and distal aa flows; near-vent and distal, hummocky pahoehoe flows; a mantled, hummocky pahoehoe flow; a platform pahoehoe flow; an alluvial fan; and a playa. Analyses of these backscatter data show that major unmodified volcanic units at Pisgah are readily distinguishable from each other and that they exhibit diffuse (HH, VV) and/or multiple (HV) scattering behavior typical of rough surfaces at these wavelengths. These analyses show that discrimination of smooth lavas (platform pahoehoe) from mantled units with greater primary roughness (hummocky pahoehoe) is difficult and must rely on supporting observations (such as evidence of localized weathering and/or sediment deposition, contrast with surrounding units, and superposition of flow units). L-band backscatter and image data at HV polarization show the best discrimination of Pisgah lava flows, with optimal unit separation observed between ∼40° and 50° incidence angles. Backscatter data shown as a function of relative age of Pisgah flows indicate that dating of lava flows on the basis of average radar backscatter may yield ambiguous results if primary flow textures and modification processes are not well understood.
","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Geological Society of America Bulletin","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Geological Society of America","doi":"10.1130/0016-7606(1992)104<0695:LFCAPV>2.3.CO;2","usgsCitation":"Gaddis, L.R., 1992, Lava-flow characterization at Pisgah Volcanic Field, California, with multiparameter imaging radar: Geological Society of America Bulletin, v. 104, no. 6, p. 695-703, https://doi.org/10.1130/0016-7606(1992)104<0695:LFCAPV>2.3.CO;2.","productDescription":"9 p.","startPage":"695","endPage":"703","numberOfPages":"9","costCenters":[{"id":131,"text":"Astrogeology Science Center","active":true,"usgs":true}],"links":[{"id":225013,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"California","otherGeospatial":"Pisgah volcanic field","volume":"104","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a4590e4b0c8380cd67415","contributors":{"authors":[{"text":"Gaddis, Lisa R. 0000-0001-9953-5483 lgaddis@usgs.gov","orcid":"https://orcid.org/0000-0001-9953-5483","contributorId":2817,"corporation":false,"usgs":true,"family":"Gaddis","given":"Lisa","email":"lgaddis@usgs.gov","middleInitial":"R.","affiliations":[{"id":131,"text":"Astrogeology Science Center","active":true,"usgs":true}],"preferred":true,"id":375888,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70017251,"text":"70017251 - 1992 - On the state of stress in the near-surface of the earth's crust","interactions":[],"lastModifiedDate":"2012-03-12T17:18:53","indexId":"70017251","displayToPublicDate":"1992-01-01T00:00:00","publicationYear":"1992","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3209,"text":"Pure and Applied Geophysics PAGEOPH","active":true,"publicationSubtype":{"id":10}},"title":"On the state of stress in the near-surface of the earth's crust","docAbstract":"Five models for near-surface crustal stresses induced by gravity and horizontal deformation and the influence of rock property contrasts, rock strength, and stress relaxation on these stresses are presented. Three of the models-the lateral constraint model, the model for crustal stresses caused by horizontal deformation, and the model for the effects of anisotropy-are linearly elastic. The other two models assume that crustal rocks are brittle or viscoelastic in order to account for the effects of rock strength and time on near-surface stresses. It is shown that the lateral constraint model is simply a special case of the combined gravity-and deformation-induced stress field when horizontal strains vanish and that the inclusion of the effect of rock anisotropy in the solution for crustal stresses caused by gravity and horizontal deformation broadens the range for predicted stresses. It is also shown that when stress levels in the crust reach the limits of brittle rock strength, these stresses become independent of strain rates and that stress relaxation in ductile crustal rocks subject to constant horizontal strain rates causes horizontal stresses to become independent of time in the long term. ?? 1992 Birkha??user Verlag.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Pure and Applied Geophysics PAGEOPH","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisherLocation":"Birkha??user-Verlag","doi":"10.1007/BF00878896","issn":"00334553","usgsCitation":"Savage, W.Z., Swolfs, H., and Amadei, B., 1992, On the state of stress in the near-surface of the earth's crust: Pure and Applied Geophysics PAGEOPH, v. 138, no. 2, p. 207-228, https://doi.org/10.1007/BF00878896.","startPage":"207","endPage":"228","numberOfPages":"22","costCenters":[],"links":[{"id":205587,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/BF00878896"},{"id":225014,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"138","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a6dfee4b0c8380cd75437","contributors":{"authors":[{"text":"Savage, W. Z.","contributorId":106481,"corporation":false,"usgs":true,"family":"Savage","given":"W.","email":"","middleInitial":"Z.","affiliations":[],"preferred":false,"id":375891,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Swolfs, H.S.","contributorId":70759,"corporation":false,"usgs":true,"family":"Swolfs","given":"H.S.","affiliations":[],"preferred":false,"id":375889,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Amadei, B.","contributorId":86902,"corporation":false,"usgs":true,"family":"Amadei","given":"B.","affiliations":[],"preferred":false,"id":375890,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70017256,"text":"70017256 - 1992 - A model of late quaternary landscape development in the Delaware Valley, New Jersey and Pennsylvania","interactions":[],"lastModifiedDate":"2024-02-02T22:33:01.718803","indexId":"70017256","displayToPublicDate":"1992-01-01T00:00:00","publicationYear":"1992","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1801,"text":"Geomorphology","active":true,"publicationSubtype":{"id":10}},"title":"A model of late quaternary landscape development in the Delaware Valley, New Jersey and Pennsylvania","docAbstract":"In the Delaware Valley of New Jersey and eastern Pennsylvania the late Quaternary history of colluviation, fluvial adjustment, and soil formation is based on the ages of pre-Wisconsinan soils and glacial deposits which are indicated by feld relationships and inferred from mid-latitude climate changes indicated by marine oxygen-isotope records. The area is divided into four terranes characterized by sandstone, gneiss, slate and carbonate rocks. Since the last pre-Wisconsinan glaciation (> 130 ka, inferred to be late Illinoian), each terrane responded differently to chemical and mechanical weathering. During the Sangamon interglacial stage (∼ 130-75 ka) in situ weathering is inferred to have occurred at rates greater than transportation of material which resulted in the formation of deep, highly weathered soil and saprolite, and dissolution of carbonate rocks. Cold climatic conditions during the Wisconsinan, on the other hand, induced erosion of the landscape at rates faster than soil development. Upland erosion during the Wisconsinan removed pre-Wisconsinan soil and glacial sediment and bedrock to produce muddy to blocky colluvium, grézes litées, and alluvial fans on footslopes. Fluvial gravel and overlying colluvium in the Delaware Valley, both buried by late Wisconsinan outwash, are inferred to represent episodes of early and middle Wisconsinan (∼ 75-25 ka) upland erosion and river aggradiation followed by river degradation and colluvium deposition. Early-middle Wisconsinan colluvium is more voluminous than later colluvium despite colder, possibly permafrost conditions during the late Wisconsinan ∼ 25-10 ka). Extensive colluviation during the early and middle Wisconsinan resulted from a longer (50 kyr), generally cold interval of erosion with a greater availability of easily eroded pre-Wisconsinan surficial materials on uplands than during the late Wisconsinan. After recession of late Wisconsinan ice from its terminal position, soil formation and landscape stability were delayed until the Holocene by a lingering cold climate, slope erosion, colluvium and alluvial fan deposition, and eolian sedimentation. Late Quaternary erosion in the Delaware Valley was dominated by glacial and periglacial processes during glacial stages. During the warm interglacial stages, soils developed on a more stable landscape. These souls were easily colluviated by periglacial erosion during periods of intermittent cold climate.
Brine seepage into the Dolores River from ground water in Paradox Valley, Colorado constitutes a major source of salt to the Colorado River. Plants are enderway to remove this source of salt by drawing down the Paradox Valley brine (PVB) and forcibly injecting it into a deep disposal well (4.8 km). Experiments were conducted to determine the effects of deep-well injection of PVB. The results show that PVB is near saturation with anhydrite at 25°C, and that heating results in anhydrite precipitation. The amount and the rate at which anhydrite forms is temperature, pressure, and substrate dependent. Paradox Valley brine heated in the presence of Precambrian rocks from the drill core produces the same amount of anhydrite as PVB heated alone, but at a greatly accelerated rate. A 30% dilution of PVB with Dolores River water completely eliminates anhydrite precipitation when the fluid is heated with the Precambrian rocks. Interaction of PVB and Leadville Limestone is characterized by dolomitization of calcite by brine Mg which releases Ca to solution. This added Ca reacts with SO4 to form increased amounts of anhydrite. A 20% dilution of PVB by Dolores River water has no effect on dolomitization and reduces the amount of anhydrite only slightly. A 65% dilution of PVB by Dolores River water still does not prevent dolomitization but does suppress anhydrite formation. Computer modeling of PVB by programs utilizing the Pitzer ion-interaction parameters is in general agreement with the experimental results. Ion-activity products calculated by both SOLMINEQ and PHRQPITZ are close to equilibrium with both anhydrite and dolomite whenever these phases are present experimentally, although the calculations over-estimate by a factor of 2 the degree of saturation. Some discrepancies in the calculated results between the two programs are due largely to differences in mineral solubility data.
The surface chemistry of fresh and weathered historical basalt flows was characterized using surface-sensitive X-ray photoelectron spectroscopy (XPS). Surfaces of unweathered 1987–1990 flows from the Kilauea Volcano, Hawaii, exhibited variable enrichment in Al, Mg, Ca, and F due to the formation of refractory fluoride compounds and pronounced depletion in Si and Fe from the volatilization of SiF4 and FeF3 during cooling. These reactions, as predicted from shifts in thermodynamic equilibrium with temperature, are induced by diffusion of HF from the flow interiors to the cooling surface. The lack of Si loss and solid fluoride formation for recent basalts from the Krafla Volcano, Iceland, suggest HF degassing at higher temperatures.
Subsequent short-term subaerial weathering reactions are strongly influenced by the initial surface composition of the flow and therefore its cooling history. Successive samples collected from the 1987 Kilauea flow demonstrated that the fluoridated flow surfaces leached to a predominantly SiO2 composition by natural weathering within one year. These chemically depleted surfaces were also observed on Hawaiian basalt flows dating back to 1801 AD. Solubility and kinetic models, based on thermodynamic and kinetic data for crystalline AlF3, MgF2, and CaF2, support observed elemental depletion rates due to chemical weathering. Additional loss of alkalis from the Hawaiian basalt occurs from incongruent dissolution of the basalt glass substrate during weathering.
","language":"English","publisher":"Elsevier","doi":"10.1016/0016-7037(92)90164-E","issn":"00167037","usgsCitation":"White, A.F., and Hochella, M., 1992, Surface chemistry associated with the cooling and subaerial weathering of recent basalt flows: Geochimica et Cosmochimica Acta, v. 56, no. 10, p. 3711-3721, https://doi.org/10.1016/0016-7037(92)90164-E.","productDescription":"11 p.","startPage":"3711","endPage":"3721","numberOfPages":"11","costCenters":[],"links":[{"id":224538,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"56","issue":"10","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b9f97e4b08c986b31e6c6","contributors":{"authors":[{"text":"White, A. F.","contributorId":36546,"corporation":false,"usgs":true,"family":"White","given":"A.","email":"","middleInitial":"F.","affiliations":[],"preferred":false,"id":375952,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hochella, M.F. Jr.","contributorId":30765,"corporation":false,"usgs":true,"family":"Hochella","given":"M.F.","suffix":"Jr.","affiliations":[],"preferred":false,"id":375951,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70017273,"text":"70017273 - 1992 - Variation of rock-forming metals in sub-annual increments of modern Greenland snow","interactions":[],"lastModifiedDate":"2023-02-09T18:06:23.045111","indexId":"70017273","displayToPublicDate":"1992-01-01T00:00:00","publicationYear":"1992","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":925,"text":"Atmospheric Environment - Part A General Topics","active":true,"publicationSubtype":{"id":10}},"title":"Variation of rock-forming metals in sub-annual increments of modern Greenland snow","docAbstract":"Modern snowpack from central south Greenland was sampled in sub-seasonal increments and analysed for a suite of major, minor and trace rock-forming metals (K, Rb, Cs, Ca, Sr, Ba). There is a sharp seasonal concentration maximum for all six metals that comes in summer, later than mid-June. Metal concentrations in all other parts of the year's snowpack are up to 10 or more times smaller. The concentration maximum is preceded by low values in autumn-winter, very low values in early-mid-spring, and moderate-to-high values in late spring-early summer; this pattern is seen consistently in three-separate time stratigraphic intervals representing the same seasonal periods, spanning the time interval 1981–1984. The absolute concentration values of the snow strata representing the low-concentration portion of the year, autumn-winter-spring, may vary substantially from year to year, by a factor of two, or more.
The finding that all rock-forming metals are at a sharp concentration maximum in late summer contrasts with the interpretations of several other studies in high-latitude northern regions. Those studies have reported a broad maximum of continental dust-associated metals in late winter and spring. However, samples of the other studies have mostly come from regions farther to the north, and the analyses have emphasized industrial pollutant metals rather than the matched rock-forming suite of the present study.
The metals measured were chosen to give information about the origin and identity of the rock and soil dusts, and sea salts, present as impurities in the snow. Metal ratios indicate that the dusts in the snowpacks are of continental origin and from ferromagnesian rocks. Source rock types for dusts in central south Greenland snow contrast with the felsic rock dusts of the Sierra Nevada, CA, annual snowpacks, and with the very felsic rock dusts in large south central Alaskan mountain glaciers. Samples in which masses of sea salt are much larger than those of rock dusts may be identified by small changes in metal ratios caused by moderate increases of K and Ca from marine sources, nearly unaccompanied by the minor and trace metals Rb, Cs and Ba, that are very rare in the oceans.
A sampling frequency, such as that of the present study, that divides a year's accumulation into 8–10 subsamples is sufficient to reveal details of the time pattern of variation in proportions and concentrations of metals that give information about atmospheric deposition of important types of earth materials.
","language":"English","publisher":"Elsevier","doi":"10.1016/0960-1686(92)90359-S","issn":"00046981","usgsCitation":"Hinkley, T.K., 1992, Variation of rock-forming metals in sub-annual increments of modern Greenland snow: Atmospheric Environment - Part A General Topics, v. 26 A, no. 13, p. 2283-2293, https://doi.org/10.1016/0960-1686(92)90359-S.","productDescription":"11 p.","startPage":"2283","endPage":"2293","costCenters":[],"links":[{"id":224540,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"Greenland","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"coordinates\": [\n [\n [\n -48.61331539242025,\n 64.67434822891337\n ],\n [\n -48.61331539242025,\n 62.66873105505019\n ],\n [\n -43.430498617816,\n 62.66873105505019\n ],\n [\n -43.430498617816,\n 64.67434822891337\n ],\n [\n -48.61331539242025,\n 64.67434822891337\n ]\n ]\n ],\n \"type\": \"Polygon\"\n }\n }\n ]\n}","volume":"26 A","issue":"13","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bc171e4b08c986b32a58d","contributors":{"authors":[{"text":"Hinkley, T. K. 0000-0001-8507-6271","orcid":"https://orcid.org/0000-0001-8507-6271","contributorId":78731,"corporation":false,"usgs":true,"family":"Hinkley","given":"T.","email":"","middleInitial":"K.","affiliations":[],"preferred":false,"id":375954,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70017281,"text":"70017281 - 1992 - Chemical, crystallographic and stable isotopic properties of alunite and jarosite from acid-Hypersaline Australian lakes","interactions":[],"lastModifiedDate":"2019-03-07T07:07:36","indexId":"70017281","displayToPublicDate":"1992-01-01T00:00:00","publicationYear":"1992","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1213,"text":"Chemical Geology","active":true,"publicationSubtype":{"id":10}},"title":"Chemical, crystallographic and stable isotopic properties of alunite and jarosite from acid-Hypersaline Australian lakes","docAbstract":"Chemical, crystallographic and isotopic analyses were made on samples containing alunite and jarosite from the sediments of four acid, hypersaline lakes in southeastern and southwestern Australia. The alunite and jarosite are K-rich with relatively low Na contents based on chemical analysis and determination of unit cell dimensions by powder X-ray diffraction. Correcting the chemical analyses of fine-grained mineral concentrates from Lake Tyrrell, Victoria, for the presence of halite, silica and poorly crystalline aluminosilicates, the following formulas indicate best estimates for solid-solution compositions: for alunite, K0.87Na0.04(H3O)0.09(Al0.92Fe0.08)3(SO4)2(OH)6 and for jarosite, K0.89Na0.07(H3O)0.04(Fe0.80Al0.20)3(SO4)2(OH)6.
The δD-values of alunite are notably larger than those for jarosite from Lake Tyrrell and it appears that the minerals have closely approached hydrogen isotope equilibrium with the acidic regional groundwaters. The δD results are consistent with a fractionation ∼60–70‰ between alunite and jarosite observed in other areas. However, interpretation of δD results is complicated by large variability in fluid δDH2O from evaporation, mixing and possible ion hydration effects in the brine. δD-values of water derived from jarosite by step-wise heating tend to be smaller at 250°C, at which temperature hydronium and other non-hydroxyl water is liberated, than at 550°C, where water is derived from the hydroxyl site, but the differences are not sufficiently different to invalidate measurements of total δD obtained by conventional, single-step heating methods.
δ34S-values for alunite and jarosite from the four lakes (+19.7 to +21.2‰ CDT) and for aqueous sulfate from Lake Tyrrell (+18.3 to +19.8‰) are close to the values for modern evaporites (
δ18OSO4-values for alunite from three Western Australia lakes (+17.8 to +18.3‰ V-SMOW), for alunite and jarosite from Lake Tyrrell (+22.6 to +24.9‰) and for aqueous sulfate from Lake Tyrrell (+17.3 to +19.0‰) are much larger than the average value for seawater (+9.6‰). The data suggest an approach to 18O-16O equilibrium between aqueous sulfate and groundwater, which is known from experimental studies to be possible at low pH and low temperatures, but has not been previously documented in nature. A residence time of ∼0.1–1 kyr for sulfate in acidic water (pH 3–4) is needed to achieve the apparent partial oxygen exchange, using previously published data of R.M. Lloyd.
","language":"English","publisher":"Elsevier","doi":"10.1016/0009-2541(92)90129-S","issn":"00092541","usgsCitation":"Alpers, C.N., Rye, R.O., Nordstrom, D.K., White, L.D., and King, B., 1992, Chemical, crystallographic and stable isotopic properties of alunite and jarosite from acid-Hypersaline Australian lakes: Chemical Geology, v. 96, no. 1-2, p. 203-226, https://doi.org/10.1016/0009-2541(92)90129-S.","productDescription":"24 p.","startPage":"203","endPage":"226","costCenters":[{"id":154,"text":"California Water Science Center","active":true,"usgs":true},{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true},{"id":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true}],"links":[{"id":266072,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/0009-2541(92)90129-S"},{"id":224688,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"96","issue":"1-2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f59be4b0c8380cd4c302","contributors":{"authors":[{"text":"Alpers, Charles N. 0000-0001-6945-7365 cnalpers@usgs.gov","orcid":"https://orcid.org/0000-0001-6945-7365","contributorId":411,"corporation":false,"usgs":true,"family":"Alpers","given":"Charles","email":"cnalpers@usgs.gov","middleInitial":"N.","affiliations":[{"id":154,"text":"California Water Science Center","active":true,"usgs":true}],"preferred":true,"id":375979,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Rye, R. O.","contributorId":66208,"corporation":false,"usgs":true,"family":"Rye","given":"R.","email":"","middleInitial":"O.","affiliations":[],"preferred":false,"id":375977,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Nordstrom, D. Kirk 0000-0003-3283-5136 dkn@usgs.gov","orcid":"https://orcid.org/0000-0003-3283-5136","contributorId":749,"corporation":false,"usgs":true,"family":"Nordstrom","given":"D.","email":"dkn@usgs.gov","middleInitial":"Kirk","affiliations":[{"id":37277,"text":"WMA - Earth System Processes Division","active":true,"usgs":true},{"id":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true}],"preferred":false,"id":375978,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"White, L. D.","contributorId":14330,"corporation":false,"usgs":true,"family":"White","given":"L.","email":"","middleInitial":"D.","affiliations":[],"preferred":false,"id":375975,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"King, B.-S.","contributorId":54592,"corporation":false,"usgs":true,"family":"King","given":"B.-S.","email":"","affiliations":[],"preferred":false,"id":375976,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ,{"id":70017286,"text":"70017286 - 1992 - Improved first-order uncertainty method for water-quality modeling","interactions":[],"lastModifiedDate":"2024-04-22T15:05:19.879414","indexId":"70017286","displayToPublicDate":"1992-01-01T00:00:00","publicationYear":"1992","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2255,"text":"Journal of Environmental Engineering","active":true,"publicationSubtype":{"id":10}},"title":"Improved first-order uncertainty method for water-quality modeling","docAbstract":"Uncertainties are unavoidable in water-quality modeling and subsequent management decisions. Monte Carlo simulation and first-order uncertainty analysis (involving linearization at central values of the uncertain variables) have been frequently used to estimate probability distributions for water-quality model output due to their simplicity. Each method has its drawbacks: Monte Carlo simulation's is mainly computational time; and first-order analysis are mainly questions of accuracy and representativeness, especially for nonlinear systems and extreme conditions. An improved (advanced) first-order method is presented, where the linearization point varies to match the output level whose exceedance probability is sought. The advanced first-order method is tested on the Streeter-Phelps equation to estimate the probability distribution of critical dissolved-oxygen deficit and critical dissolved oxygen using two hypothetical examples from the literature. The advanced first-order method provides a close approximation of the exceedance probability for the Streeter-Phelps model output estimated by Monte Carlo simulation using less computer time - by two orders of magnitude - regardless of the probability distributions assumed for the uncertain model parameters.","language":"English","publisher":"ASCE","doi":"10.1061/(ASCE)0733-9372(1992)118:5(791)","issn":"07339372","usgsCitation":"Melching, C., and Anmangandla, S., 1992, Improved first-order uncertainty method for water-quality modeling: Journal of Environmental Engineering, v. 118, no. 5, p. 791-805, https://doi.org/10.1061/(ASCE)0733-9372(1992)118:5(791).","productDescription":"15 p.","startPage":"791","endPage":"805","numberOfPages":"15","costCenters":[],"links":[{"id":224736,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"118","issue":"5","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a3957e4b0c8380cd618b2","contributors":{"authors":[{"text":"Melching, Charles S.","contributorId":23973,"corporation":false,"usgs":true,"family":"Melching","given":"Charles S.","affiliations":[],"preferred":false,"id":375989,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Anmangandla, S.","contributorId":7850,"corporation":false,"usgs":true,"family":"Anmangandla","given":"S.","email":"","affiliations":[],"preferred":false,"id":375988,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70017289,"text":"70017289 - 1992 - The hydrodynamics of the Big Horn basin: A study of the role of faults","interactions":[],"lastModifiedDate":"2023-01-19T17:51:24.687857","indexId":"70017289","displayToPublicDate":"1992-01-01T00:00:00","publicationYear":"1992","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":701,"text":"American Association of Petroleum Geologists Bulletin","active":true,"publicationSubtype":{"id":10}},"title":"The hydrodynamics of the Big Horn basin: A study of the role of faults","docAbstract":"A three-dimensional mathematical model simulates virgin groundwater flow in the Big Horn basin, Wyoming. The computed results are compared to two published interpretations of the Tensleep Sandstone virgin potentiometric surface; both of these interpretations, Bredehoeft and Bennett, and Haun, were made from the same data set. The published maps are quite different. Bredehoeft and Bennett ignored the faults; Haun treated the faults as horizontal barriers to flow.
The hydraulic head at depth over much of the Big Horn basin is near the land surface elevation, a condition usually defined as hydrostatic. This condition indicates a high, regional-scale, vertical conductivity for the sediments in the basin. Our hypothesis to explain the high conductivity is that the faults act as vertical conduits for fluid flow. These same faults can act as either horizontal barriers to flow or nonbarriers, depending upon whether the fault zones are more permeable or less permeable than the adjoining aquifers.
A three-dimensional simulation of fluid flow in the basin indicates that either of the potentiometric interpretations, that of Bredehoeft and Bennett or that of Haun, can be reproduced. The results depend upon whether the fault zones are lateral barriers to flow. In the case where the faults are lateral barriers, the basin is broken into compartments with much of the areal head loss occurring across the fault zones.
","language":"English","publisher":"American Association of Petroleum Geologists","doi":"10.1306/BDFF8862-1718-11D7-8645000102C1865D","usgsCitation":"Bredehoeft, J., Belitz, K., and Sharp-Hansen, S., 1992, The hydrodynamics of the Big Horn basin: A study of the role of faults: American Association of Petroleum Geologists Bulletin, v. 76, no. 4, p. 530-546, https://doi.org/10.1306/BDFF8862-1718-11D7-8645000102C1865D.","productDescription":"17 p.","startPage":"530","endPage":"546","numberOfPages":"17","costCenters":[],"links":[{"id":224786,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Montana, Wyoming","otherGeospatial":"Big Horn basin","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"coordinates\": [\n [\n [\n -107.95547782805107,\n 43.4855183693671\n ],\n [\n -107.20215940356405,\n 43.69167057387412\n ],\n [\n -107.53827666732178,\n 44.277621348481944\n ],\n [\n -108.17998888621935,\n 45.06059888849629\n ],\n [\n -108.6740371579595,\n 45.354664015874505\n ],\n [\n -108.97759513387714,\n 45.29580825083869\n ],\n [\n -109.13937914969532,\n 44.82712943909215\n ],\n [\n -108.94576789197424,\n 44.282944909573445\n ],\n [\n -109.05263843020288,\n 44.049748043540205\n ],\n [\n -108.67570589216763,\n 43.720473324220166\n ],\n [\n -107.95547782805107,\n 43.4855183693671\n ]\n ]\n ],\n \"type\": \"Polygon\"\n }\n }\n ]\n}","volume":"76","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bacc5e4b08c986b32371c","contributors":{"authors":[{"text":"Bredehoeft, J.D.","contributorId":12836,"corporation":false,"usgs":true,"family":"Bredehoeft","given":"J.D.","affiliations":[],"preferred":false,"id":376000,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Belitz, K. 0000-0003-4481-2345","orcid":"https://orcid.org/0000-0003-4481-2345","contributorId":10164,"corporation":false,"usgs":true,"family":"Belitz","given":"K.","affiliations":[],"preferred":false,"id":375999,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Sharp-Hansen, S.","contributorId":91247,"corporation":false,"usgs":true,"family":"Sharp-Hansen","given":"S.","email":"","affiliations":[],"preferred":false,"id":376001,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70017293,"text":"70017293 - 1992 - Seismic response of Pacific Park Plaza. I. Data and preliminary analysis","interactions":[],"lastModifiedDate":"2013-03-15T20:14:35","indexId":"70017293","displayToPublicDate":"1992-01-01T00:00:00","publicationYear":"1992","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2467,"text":"Journal of Structural Engineering","active":true,"publicationSubtype":{"id":10}},"title":"Seismic response of Pacific Park Plaza. I. Data and preliminary analysis","docAbstract":"The objective of this paper is to present analyses of a set of acceleration response records obtained during the October 17, 1989 Loma Prieta earthquake (Ms = 7.1) from the 30-story, three-winged, ductile moment-resistant reinforced-concrete-framed Pacific Park Plaza Building, located in Emeryville, east of San Francisco, Calif. The building was constructed in 1983, and instrumented in 1985 with 21 channels of synchronized uniaxial accelerometers deployed throughout the structure, and three channels of accelerometers located at free-field outside on the north side of the building, all connected to a central recording system. In addition, a triaxial strong-motion accelerograph is deployed at free-field on the south side of the building. The predominant response modes of the building and the associated frequencies at approximately 0.4 Hz and 1.0 Hz are identified visually from the unprocessed records, and also from Fourier amplitude spectra of the processed records, which, as expected, reveal significant torsional motion. In addition, the response spectra of the free-field and basement motions are very similar. These spectra show that significant structural resonances at higher modes influence both the ground level and the free-field motions, thus rising the question as to the definition of free-field motion, at least at this site. This part of the paper includes the preliminary analyses of the data acquired from this building. Part 2 of the paper provides detailed analyses of the data using system identification techniques.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Structural Engineering","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"ASCE","doi":"10.1061/(ASCE)0733-9445(1992)118:6(1547)","issn":"07339445","usgsCitation":"Çelebi, M., and Safak, E., 1992, Seismic response of Pacific Park Plaza. I. Data and preliminary analysis: Journal of Structural Engineering, v. 118, no. 6, p. 1547-1565, https://doi.org/10.1061/(ASCE)0733-9445(1992)118:6(1547).","startPage":"1547","endPage":"1565","numberOfPages":"19","costCenters":[],"links":[{"id":224833,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":269412,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1061/(ASCE)0733-9445(1992)118:6(1547)"}],"volume":"118","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b8b59e4b08c986b317779","contributors":{"authors":[{"text":"Çelebi, M.","contributorId":36946,"corporation":false,"usgs":true,"family":"Çelebi","given":"M.","affiliations":[],"preferred":false,"id":376008,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Safak, E.","contributorId":104070,"corporation":false,"usgs":true,"family":"Safak","given":"E.","email":"","affiliations":[],"preferred":false,"id":376009,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70017295,"text":"70017295 - 1992 - Reconnaissance exploration geochemistry in the central Brooks Range, northern Alaska: Implications for exploration of sediment-hosted zinc-lead-silver deposits","interactions":[],"lastModifiedDate":"2024-04-16T00:29:18.358657","indexId":"70017295","displayToPublicDate":"1992-01-01T00:00:00","publicationYear":"1992","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":"Reconnaissance exploration geochemistry in the central Brooks Range, northern Alaska: Implications for exploration of sediment-hosted zinc-lead-silver deposits","docAbstract":"A reconnaissance geochemical survey was conducted in the southern Killik River quadrangle, central Brooks Range, northern Alaska. The Brooks Range lies within the zone of continuous permafrost which may partially inhibit chemical weathering and oxidation. The minus 30-mesh and nonmagnetic heavy-mineral concentrate fractions of sediment samples were chosen as the sample media for the survey so that mechanical rather than chemical dispersion patterns would be enhanced. A total of 263 sites were sampled within the southern half of the Killik River quadrangle at an average sample density of approximately one sample per 12 km2. All samples were submitted for multi-element analyses.
In the western and central Brooks Range, several known sediment-hosted Zn-Pb-Ag(-Ba) deposits occur within a belt of Paleozoic rocks of the Endicott Mountains allochthon. Exploration for this type of deposit in the Brook Range is difficult, due to the inherently high background values for Ba, Zn and Pb in shale and the common occurrence of metamorphic quartz-calcite veins, many of which contain traces of sulfide minerals. Stream sediments derived from these sources produce numerous geochemical anomalies which are not necessarily associated with significant mineralization.
R-mode factor analysis provides a means of distinguishing between element associations related to lithology and those related to possible mineralization. Factor analysis applied to the multi-element data from the southern Killik River quadrangle resulted in the discovery of two additional Zn-Pb-Ag mineral occurrences of considerable areal extent which are 80–100 km east of any previously known deposit. These have been informally named the Kady and Vidlee. Several lithogeochemical element associations, or factors, and three factors which represent sulfide mineralization were identified: Ag-Pb-Zn (galena and sphalerite) and Fe-Ni-Co-Cu (pyrite ± chalcopyrite) in the concentrate samples and Cd-Zn-Pb-As-Mn in the sediment samples. The distribution of high scores for each individual mineralization factor outlined several relatively large (200–250 km2) geochemically favorable areas. When the distribution of high scores for all three factors were superimposed, samples characterized by high scores for one or both of the concentrate mineralization factors and the mineralization factor in sediments define basin areas of approximately 48 and 64 km2 surrounding Kady and Vidlee, respectively.
UPWELLING of nutrient-rich Pacific deep water along the North American west coast is ultimately driven by the temperature difference between air masses over land and over the ocean. The intensity of upwelling, and biological production in the region, could therefore be affected by anthropogenic climate change. Examination of the geological record is one way to study the link between climate and upwelling. Because Pacific deep water is enriched in cadmium, dissolved cadmium concentrations in coastal water off central California reflect the intensity of upwelling. By demonstrating that the Cd/Ca ratio in the shell of a benthic foraminifer, Elphidiella hannai, is proportional to the Cd concentration in coastal water, we show here that foraminiferal Cd/Ca ratios can be used to detect past changes in mean upwelling intensity. Examination of a sediment core from the mouth of San Francisco Bay reveals that foraminiferal Cd/Ca decreased by about 30% from 4,000 years ago to the present, probably because of a reduction in coastal upwelling. This observation is consistent with predictions of atmospheric general circulation models that northwesterly winds, which drive upwelling, became weaker over this period as summer insolation of the Northern Hemisphere decreased.
","language":"English","publisher":"Nature Publishing Group","doi":"10.1038/358054a0","issn":"00280836","usgsCitation":"VanGeen, A., Luoma, N., Fuller, C.C., Anima, R., Clifton, H., and Trumbore, S., 1992, Evidence from Cd/Ca ratios in foraminifera for greater upwelling off California 4,000 years ago: Nature, v. 358, no. 6381, p. 54-56, https://doi.org/10.1038/358054a0.","startPage":"54","endPage":"56","numberOfPages":"3","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":552,"text":"San Francisco Bay-Delta","active":false,"usgs":true},{"id":5079,"text":"Pacific Regional Director's Office","active":true,"usgs":true}],"links":[{"id":479595,"rank":2,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"https://escholarship.org/uc/item/61v845hk","text":"External Repository"},{"id":225018,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"358","issue":"6381","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0d59e4b0c8380cd52f80","contributors":{"authors":[{"text":"VanGeen, A.","contributorId":84086,"corporation":false,"usgs":true,"family":"VanGeen","given":"A.","email":"","affiliations":[],"preferred":false,"id":376063,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Luoma, N.","contributorId":66430,"corporation":false,"usgs":true,"family":"Luoma","given":"N.","email":"","affiliations":[],"preferred":false,"id":376061,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Fuller, C. C.","contributorId":29858,"corporation":false,"usgs":true,"family":"Fuller","given":"C.","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":376059,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Anima, R.","contributorId":77304,"corporation":false,"usgs":true,"family":"Anima","given":"R.","affiliations":[],"preferred":false,"id":376062,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Clifton, H.E.","contributorId":44151,"corporation":false,"usgs":true,"family":"Clifton","given":"H.E.","affiliations":[],"preferred":false,"id":376060,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Trumbore, S.","contributorId":89287,"corporation":false,"usgs":true,"family":"Trumbore","given":"S.","email":"","affiliations":[],"preferred":false,"id":376064,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}} ,{"id":70017307,"text":"70017307 - 1992 - Progress report on the Worldwide Earthquake Risk Management (WWERM) Program","interactions":[],"lastModifiedDate":"2012-03-12T17:18:47","indexId":"70017307","displayToPublicDate":"1992-01-01T00:00:00","publicationYear":"1992","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Progress report on the Worldwide Earthquake Risk Management (WWERM) Program","docAbstract":"Considerable progress has been made in the Worldwide Earthquake Risk Management (WWERM) Program since its initiation in late 1989 as a cooperative program of the Agency for International Development (AID), Office of U.S. Foreign Disaster Assistance (OFDA), and the U.S. Geological Survey. Probabilistic peak acceleration and peak Modified Mercalli intensity (MMI) maps have been prepared for Chile and for Sulawesi province in Indonesia. Earthquake risk (loss) studies for dwellings in Gorontalo, North Sulawesi, have been completed and risk studies for dwellings in selected areas of central Chile are underway. A special study of the effect of site response on earthquake ground motion estimation in central Chile has also been completed and indicates that site response may modify the ground shaking by as much as plus or minus two units of MMI. A program for the development of national probabilistic ground motion maps for the Philippines is now underway and pilot studies of earthquake ground motion and risk are being planned for Morocco.","largerWorkTitle":"NIST Special Publication","conferenceTitle":"Proceedings of the 24th Joint Meeting on Wind and Seismic Effects","conferenceLocation":"Gaithersburg, MD, USA","language":"English","publisher":"Publ by Natl Inst of Standards & Technology","publisherLocation":"Gaithersburg, MD, United States","usgsCitation":"Algermissen, S.T., Hays, W., and Krumpe, P.R., 1992, Progress report on the Worldwide Earthquake Risk Management (WWERM) Program, in NIST Special Publication, no. 843, Gaithersburg, MD, USA, p. 329-336.","startPage":"329","endPage":"336","numberOfPages":"8","costCenters":[],"links":[{"id":225063,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"issue":"843","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a8eaae4b0c8380cd7f30f","contributors":{"authors":[{"text":"Algermissen, S. T.","contributorId":39790,"corporation":false,"usgs":true,"family":"Algermissen","given":"S.","email":"","middleInitial":"T.","affiliations":[],"preferred":false,"id":376070,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hays, Walter W.","contributorId":66669,"corporation":false,"usgs":true,"family":"Hays","given":"Walter W.","affiliations":[],"preferred":false,"id":376071,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Krumpe, Paul R.","contributorId":69310,"corporation":false,"usgs":true,"family":"Krumpe","given":"Paul","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":376072,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70017308,"text":"70017308 - 1992 - Hydrous pyrolysis of crude oil in gold-plated reactors","interactions":[],"lastModifiedDate":"2019-03-14T05:52:59","indexId":"70017308","displayToPublicDate":"1992-01-01T00:00:00","publicationYear":"1992","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2958,"text":"Organic Geochemistry","active":true,"publicationSubtype":{"id":10}},"title":"Hydrous pyrolysis of crude oil in gold-plated reactors","docAbstract":"Crude oils from Iraq and California have been pyrolyzed under hydrous conditions at 200 and 300°C for time periods up to 210 days, in gold-plated reactors. Elemental (vanadium, nickel), stable isotopic (carbon), and molecular (n-alkanes, acyclic isoprenoids, steranes, terpanes and aromatic steroid hydrocarbons) analyses were made on the original and pyrolyzed oils. Various conventional crude oil maturity parameters, including 20S/(20S + 20R)-24-ethylcholestane ratios and the side-chain-length distribution of aliphatic and aromatic steroidal hydrocarbons, were measured in an effort to assess the modification of molecular maturity parameters in clay-free settings, similar to those encountered in “clean” reservoirs.
Concentrations of vanadium and nickel in the Iraq oil decrease significantly and the V/(V + Ni) ratio decreases slightly, with increasing pyrolysis time/temperature. Whole oil carbon isotope ratios remain fairly constant during pyrolysis, as do hopane/sterane ratios and carbon number distribution of 5α(H),14α(H),17α(H),20R steranes. These latter three parameters are considered maturity-invariant.
The ratios of short side-chain components to long side-chain components of the regular steranes [C21/(C21 + C29R)] and the triaromatic steroid hydrocarbons [C21/(C21 + C28)] vary systematically with increasing pyrolysis time, indicating that these parameters may be useful as molecular maturity parameters for crude oils in clay-free reservoir rocks. In addition, decreases in bisnorhopane/hopane ratio with increasing pyrolysis time, in a clay-free and kerogen-free environment, suggest that the distribution of these compounds is controlled by either differential thermal stabilities or preferential release from a higher-molecular weight portion of the oil.
","language":"English","publisher":"Elsevier","doi":"10.1016/0146-6380(92)90100-C","issn":"01466380","usgsCitation":"Curiale, J., Lundegard, P., and Kharaka, Y., 1992, Hydrous pyrolysis of crude oil in gold-plated reactors: Organic Geochemistry, v. 18, no. 5, p. 745-756, https://doi.org/10.1016/0146-6380(92)90100-C.","productDescription":"12 p.","startPage":"745","endPage":"756","costCenters":[{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":225112,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"18","issue":"5","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a37b2e4b0c8380cd6109e","contributors":{"authors":[{"text":"Curiale, J.A.","contributorId":84078,"corporation":false,"usgs":true,"family":"Curiale","given":"J.A.","email":"","affiliations":[],"preferred":false,"id":376075,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Lundegard, P.D.","contributorId":71323,"corporation":false,"usgs":true,"family":"Lundegard","given":"P.D.","email":"","affiliations":[],"preferred":false,"id":376074,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Kharaka, Y.K.","contributorId":23568,"corporation":false,"usgs":true,"family":"Kharaka","given":"Y.K.","email":"","affiliations":[],"preferred":false,"id":376073,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70017313,"text":"70017313 - 1992 - Distribution and characteristics of metamorphic belts in the south-eastern Alaska part of the North American Cordillera","interactions":[],"lastModifiedDate":"2024-05-09T16:41:51.95497","indexId":"70017313","displayToPublicDate":"1992-01-01T00:00:00","publicationYear":"1992","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2389,"text":"Journal of Metamorphic Geology","active":true,"publicationSubtype":{"id":10}},"title":"Distribution and characteristics of metamorphic belts in the south-eastern Alaska part of the North American Cordillera","docAbstract":"The Cordilleran orogen in south-eastern Alaska includes 14 distinct metamorphic belts that make up three major metamorphic complexes, from east to west: the Coast plutonic–metamorphic complex in the Coast Mountains; the Glacier Bay–Chichagof plutonic–metamorphic complex in the central part of the Alexander Archipelago; and the Chugach plutonic–metamorphic complex in the northern outer islands. Each of these complexes is related to a major subduction event. The metamorphic history of the Coast plutonic–metamorphic complex is lengthy and is related to the Late Cretaceous collision of the Alexander and Wrangellia terranes and the Gravina overlap assemblage to the west against the Stikine terrane to the east. The metamorphic history of the Glacier Bay–Chichagof plutonic–metamorphic complex is relatively simple and is related to the roots of a Late Jurassic to late Early Cretaceous island arc. The metamorphic history of the Chugach plutonic–metamorphic complex is complicated and developed during and after the Late Cretaceous collision of the Chugach terrane with the Wrangellia and Alexander terranes.
The Coast plutonic–metamorphic complex records both dynamothermal and regional contact metamorphic events related to widespread plutonism within several juxtaposed terranes. Widespread moderate-P/T dynamothermal metamorphism affected most of this complex during the early Late Cretaceous, and local high-P/T metamorphism affected some parts during the middle Late Cretaceous. These events were contemporaneous with low- to moderate-P, high-T metamorphism elsewhere in the complex. Finally, widespread high-P–T conditions affected most of the western part of the complex in a culminating late Late Cretaceous event. The eastern part of the complex contains an older, pre-Late Triassic metamorphic belt that has been locally overprinted by a widespread middle Tertiary thermal event.
The Glacier Bay–Chichagof plutonic–metamorphic complex records dominantly regional contact-metamorphic events that affected rocks of the Alexander and Wrangellia terranes. Widespread low-P, high-T assemblages occur adjacent to regionally extensive foliated granitic, dioritic and gabbroic rocks. Two closely related plutonic events are recognized, one of Late Jurassic age and another of late Early and early Late Cretaceous age; the associated metamorphic events are indistinguishable. A small Late Devonian or Early Mississippian dynamothermal belt occurs just north-east of the complex. Two older low-grade regional metamorphic belts on strike with the complex to the south are related to a Cambrian to Ordovician orogeny and to a widespread Middle Silurian to Early Devonian orogeny.
The Chugach plutonic–metamorphic complex records a widespread late Late Cretaceous low- to medium/high-P, moderate- T metamorphic event and a local transitional or superposed early Tertiary low-P, high-T regional metamorphic event associated with mesozonal granitic intrusions that affected regionally deformed and metamorphosed rocks of the Chugach terrane. The Chugach complex also includes a post-Late Triassic to pre-Late Jurassic belt with uncertain relations to the younger belts.
","language":"English","publisher":"Wiley","doi":"10.1111/j.1525-1314.1992.tb00097.x","issn":"02634929","usgsCitation":"Brew, D.A., Himmelberg, G.R., Loney, R.A., and Ford, A.B., 1992, Distribution and characteristics of metamorphic belts in the south-eastern Alaska part of the North American Cordillera: Journal of Metamorphic Geology, v. 10, no. 3, p. 465-482, https://doi.org/10.1111/j.1525-1314.1992.tb00097.x.","productDescription":"18 p.","startPage":"465","endPage":"482","numberOfPages":"18","costCenters":[],"links":[{"id":225167,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"10","issue":"3","noUsgsAuthors":false,"publicationDate":"2007-05-05","publicationStatus":"PW","scienceBaseUri":"505a027fe4b0c8380cd50088","contributors":{"authors":[{"text":"Brew, D. A.","contributorId":88344,"corporation":false,"usgs":true,"family":"Brew","given":"D.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":376084,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Himmelberg, G. R.","contributorId":27106,"corporation":false,"usgs":true,"family":"Himmelberg","given":"G.","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":376082,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Loney, R. A.","contributorId":90757,"corporation":false,"usgs":true,"family":"Loney","given":"R.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":376085,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Ford, A. B.","contributorId":44924,"corporation":false,"usgs":false,"family":"Ford","given":"A.","email":"","middleInitial":"B.","affiliations":[],"preferred":false,"id":376083,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70017317,"text":"70017317 - 1992 - The Galileo Solid-State Imaging experiment","interactions":[],"lastModifiedDate":"2012-03-12T17:18:50","indexId":"70017317","displayToPublicDate":"1992-01-01T00:00:00","publicationYear":"1992","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3454,"text":"Space Science Reviews","active":true,"publicationSubtype":{"id":10}},"title":"The Galileo Solid-State Imaging experiment","docAbstract":"The Solid State Imaging (SSI) experiment on the Galileo Orbiter spacecraft utilizes a high-resolution (1500 mm focal length) television camera with an 800 ?? 800 pixel virtual-phase, charge-coupled detector. It is designed to return images of Jupiter and its satellites that are characterized by a combination of sensitivity levels, spatial resolution, geometric fiedelity, and spectral range unmatched by imaging data obtained previously. The spectral range extends from approximately 375 to 1100 nm and only in the near ultra-violet region (??? 350 nm) is the spectral coverage reduced from previous missions. The camera is approximately 100 times more sensitive than those used in the Voyager mission, and, because of the nature of the satellite encounters, will produce images with approximately 100 times the ground resolution (i.e., ??? 50 m lp-1) on the Galilean satellites. We describe aspects of the detector including its sensitivity to energetic particle radiation and how the requirements for a large full-well capacity and long-term stability in operating voltages led to the choice of the virtual phase chip. The F/8.5 camera system can reach point sources of V(mag) ??? 11 with S/N ??? 10 and extended sources with surface brightness as low as 20 kR in its highest gain state and longest exposure mode. We describe the performance of the system as determined by ground calibration and the improvements that have been made to the telescope (same basic catadioptric design that was used in Mariner 10 and the Voyager high-resolution cameras) to reduce the scattered light reaching the detector. The images are linearly digitized 8-bits deep and, after flat-fielding, are cosmetically clean. Information 'preserving' and 'non-preserving' on-board data compression capabilities are outlined. A special \"summation\" mode, designed for use deep in the Jovian radiation belts, near Io, is also described. The detector is 'preflashed' before each exposure to ensure the photometric linearity. The dynamic range is spread over 3 gain states and an exposure range from 4.17 ms to 51.2 s. A low-level of radial, third-order, geometric distortion has been measured in the raw images that is entirely due to the optical design. The distortion is of the pincushion type and amounts to about 1.2 pixels in the corners of the images. It is expected to be very stable. We discuss the measurement objectives of the SSI experiment in the Jupiter system and emphasize their relationships to those of other experiments in the Galileo project. We outline objectives for Jupiter atmospheric science, noting the relationship of SSI data to that to be returned by experiments on the atmospheric entry Probe. We also outline SSI objectives for satellite surfaces, ring structure, and 'darkside' (e.g., aurorae, lightning, etc.) experiments. Proposed cruise measurement objectives that relate to encounters at Venus, Moon, Earth, Gaspra, and, possibly, Ida are also briefly outlined. The article concludes with a description of a 'fully distributed' data analysis system (HIIPS) that SSI team members intend to use at their home institutions. We also list the nature of systematic data products that will become available to the scientific community. Finally, we append a short 'historical' note outlining the responsibilities and roles of institutions and individuals that have been involved in the 14 year development of the SSI experiment so far. ?? 1992 Kluwer Academic Publishers.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Space Science Reviews","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisherLocation":"Kluwer Academic Publishers","doi":"10.1007/BF00216864","issn":"00386308","usgsCitation":"Belton, M.J., Klaasen, K., Clary, M., Anderson, J.L., Anger, C., Carr, M.H., Chapman, C.R., Davies, M.E., Greeley, R., Anderson, D., Bolef, L., Townsend, T., Greenberg, R., Head, J.W., Neukum, G., Pilcher, C., Veverka, J., Gierasch, P., Fanale, F.P., Ingersoll, A., Masursky, H., Morrison, D., and Pollack, J.B., 1992, The Galileo Solid-State Imaging experiment: Space Science Reviews, v. 60, no. 1-4, p. 413-455, https://doi.org/10.1007/BF00216864.","startPage":"413","endPage":"455","numberOfPages":"43","costCenters":[],"links":[{"id":205492,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/BF00216864"},{"id":224494,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"60","issue":"1-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505ba741e4b08c986b321470","contributors":{"authors":[{"text":"Belton, M. J. S.","contributorId":79223,"corporation":false,"usgs":true,"family":"Belton","given":"M.","email":"","middleInitial":"J. S.","affiliations":[],"preferred":false,"id":376108,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Klaasen, K.P.","contributorId":56806,"corporation":false,"usgs":true,"family":"Klaasen","given":"K.P.","email":"","affiliations":[],"preferred":false,"id":376105,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Clary, M.C.","contributorId":70932,"corporation":false,"usgs":true,"family":"Clary","given":"M.C.","email":"","affiliations":[],"preferred":false,"id":376106,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Anderson, J. L.","contributorId":103240,"corporation":false,"usgs":true,"family":"Anderson","given":"J.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":376112,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Anger, C.D.","contributorId":84514,"corporation":false,"usgs":true,"family":"Anger","given":"C.D.","email":"","affiliations":[],"preferred":false,"id":376109,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"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":376110,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Chapman, C. R.","contributorId":12984,"corporation":false,"usgs":true,"family":"Chapman","given":"C.","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":376097,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Davies, M. E.","contributorId":26050,"corporation":false,"usgs":true,"family":"Davies","given":"M.","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":376099,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Greeley, R.","contributorId":6538,"corporation":false,"usgs":true,"family":"Greeley","given":"R.","email":"","affiliations":[],"preferred":false,"id":376093,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Anderson, D.","contributorId":9211,"corporation":false,"usgs":true,"family":"Anderson","given":"D.","affiliations":[],"preferred":false,"id":376095,"contributorType":{"id":1,"text":"Authors"},"rank":10},{"text":"Bolef, L.K.","contributorId":51603,"corporation":false,"usgs":true,"family":"Bolef","given":"L.K.","email":"","affiliations":[],"preferred":false,"id":376103,"contributorType":{"id":1,"text":"Authors"},"rank":11},{"text":"Townsend, T.E.","contributorId":104774,"corporation":false,"usgs":true,"family":"Townsend","given":"T.E.","email":"","affiliations":[],"preferred":false,"id":376113,"contributorType":{"id":1,"text":"Authors"},"rank":12},{"text":"Greenberg, R.","contributorId":26778,"corporation":false,"usgs":true,"family":"Greenberg","given":"R.","email":"","affiliations":[],"preferred":false,"id":376100,"contributorType":{"id":1,"text":"Authors"},"rank":13},{"text":"Head, J. W. III","contributorId":106267,"corporation":false,"usgs":true,"family":"Head","given":"J.","suffix":"III","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":376115,"contributorType":{"id":1,"text":"Authors"},"rank":14},{"text":"Neukum, G.","contributorId":105443,"corporation":false,"usgs":true,"family":"Neukum","given":"G.","email":"","affiliations":[],"preferred":false,"id":376114,"contributorType":{"id":1,"text":"Authors"},"rank":15},{"text":"Pilcher, C.B.","contributorId":31917,"corporation":false,"usgs":true,"family":"Pilcher","given":"C.B.","email":"","affiliations":[],"preferred":false,"id":376101,"contributorType":{"id":1,"text":"Authors"},"rank":16},{"text":"Veverka, J.","contributorId":71689,"corporation":false,"usgs":true,"family":"Veverka","given":"J.","email":"","affiliations":[],"preferred":false,"id":376107,"contributorType":{"id":1,"text":"Authors"},"rank":17},{"text":"Gierasch, P.J.","contributorId":9005,"corporation":false,"usgs":true,"family":"Gierasch","given":"P.J.","email":"","affiliations":[],"preferred":false,"id":376094,"contributorType":{"id":1,"text":"Authors"},"rank":18},{"text":"Fanale, F. P.","contributorId":24925,"corporation":false,"usgs":false,"family":"Fanale","given":"F.","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":376098,"contributorType":{"id":1,"text":"Authors"},"rank":19},{"text":"Ingersoll, A.P.","contributorId":54735,"corporation":false,"usgs":true,"family":"Ingersoll","given":"A.P.","email":"","affiliations":[],"preferred":false,"id":376104,"contributorType":{"id":1,"text":"Authors"},"rank":20},{"text":"Masursky, H.","contributorId":33823,"corporation":false,"usgs":true,"family":"Masursky","given":"H.","affiliations":[],"preferred":false,"id":376102,"contributorType":{"id":1,"text":"Authors"},"rank":21},{"text":"Morrison, D.","contributorId":98015,"corporation":false,"usgs":true,"family":"Morrison","given":"D.","email":"","affiliations":[],"preferred":false,"id":376111,"contributorType":{"id":1,"text":"Authors"},"rank":22},{"text":"Pollack, James B.","contributorId":12616,"corporation":false,"usgs":true,"family":"Pollack","given":"James","email":"","middleInitial":"B.","affiliations":[],"preferred":false,"id":376096,"contributorType":{"id":1,"text":"Authors"},"rank":23}]}} ,{"id":70017326,"text":"70017326 - 1992 - Seismic excitation by space shuttles","interactions":[],"lastModifiedDate":"2012-03-12T17:18:49","indexId":"70017326","displayToPublicDate":"1992-01-01T00:00:00","publicationYear":"1992","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3384,"text":"Shock Waves","active":true,"publicationSubtype":{"id":10}},"title":"Seismic excitation by space shuttles","docAbstract":"Shock waves generated by the space shuttles Columbia (August 13, 1989), Atlantis (April 11, 1991) and Discovery (September 18, 1991) on their return to Edwards Air Force Base, California, were recorded by TERRAscope (Caltech's broadband seismic network), the Caltech-U.S.G.S Southern California Seismic Network (SCSN), and the University of Southern California (USC) Los Angeles Basin Seismic Network. The spatial pattern of the arrival times exhibits hyperbolic shock fronts from which the path, velocity and altitude of the space shuttle could be determined. The shock wave was acoustically coupled to the ground, converted to a seismic wave, and recorded clearly at the broadband TERRAscope stations. The acoustic coupling occurred very differently depending on the conditions of the Earth's surface surrounding the station. For a seismic station located on hard bedrock, the shock wave (N wave) was clearly recorded with little distortion. Aside from the N wave, very little acoustic coupling of the shock wave energy to the ground occurred at these sites. The observed N wave record was used to estimate the overpressure of the shock wave accurately; a pressure change of 0.5 to 2.2 mbars was obtained. For a seismic station located close to the ocean or soft sedimentary basins, a significant amount of shock wave energy was transferred to the ground through acoustic coupling of the shock wave and the oceanic Rayleigh wave. A distinct topography such as a mountain range was found effective to couple the shock wave energy to the ground. Shock wave energy was also coupled to the ground very effectively through large man made structures such as high rise buildings and offshore oil drilling platforms. For the space shuttle Columbia, in particular, a distinct pulse having a period of about 2 to 3 seconds was observed, 12.5 s before the shock wave, with a broadband seismograph in Pasadena. This pulse was probably excited by the high rise buildings in downtown Los Angeles which were simultaneously hit by the space shuttle shock waves. The proximity of the natural periods of the high rise buildings and the modal periods of the Los Angeles basin enabled efficient energy transfer from shock wave to seismic wave. ?? 1992 Springer-Verlag.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Shock Waves","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisherLocation":"Springer-Verlag","doi":"10.1007/BF01415896","issn":"09381287","usgsCitation":"Kanamori, H., Mori, J., Sturtevant, B., Anderson, D., and Heaton, T., 1992, Seismic excitation by space shuttles: Shock Waves, v. 2, no. 2, p. 89-96, https://doi.org/10.1007/BF01415896.","startPage":"89","endPage":"96","numberOfPages":"8","costCenters":[],"links":[{"id":205521,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/BF01415896"},{"id":224642,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"2","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b8b13e4b08c986b317582","contributors":{"authors":[{"text":"Kanamori, H.","contributorId":55438,"corporation":false,"usgs":true,"family":"Kanamori","given":"H.","affiliations":[],"preferred":false,"id":376139,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Mori, J.","contributorId":24923,"corporation":false,"usgs":true,"family":"Mori","given":"J.","email":"","affiliations":[],"preferred":false,"id":376137,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Sturtevant, B.","contributorId":48318,"corporation":false,"usgs":true,"family":"Sturtevant","given":"B.","email":"","affiliations":[],"preferred":false,"id":376138,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Anderson, D.L.","contributorId":68713,"corporation":false,"usgs":true,"family":"Anderson","given":"D.L.","email":"","affiliations":[],"preferred":false,"id":376140,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Heaton, T.","contributorId":107862,"corporation":false,"usgs":true,"family":"Heaton","given":"T.","affiliations":[],"preferred":false,"id":376141,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ]}