Determination of arsenic, antimony, bismuth, cadmium, copper, lead, molybdenum, silver and zinc in geological materials by atomic-absorption spectrometry
J.G. Viets, R. M. O’Leary, Robert J. Clark
1984, The Analyst (109) 1589-1592
Arsenic, antimony, bismuth, cadmium, copper, lead, molybdenum, silver and zinc are very useful elements in geochemical exploration. In the proposed method, geological samples are fused with potassium pyrosulphate and the fusate is dissolved in a solution of hydrochloric acid, ascorbic acid and potassium iodide. When this solution is shaken with...
PROJECTED EFFECTS OF GROUND-WATER DEVELOPMENT IN THE SOUTHERN HIGH PLAINS OF TEXAS AND NEW MEXICO.
Richard R. Luckey
1984, Conference Paper, Proceedings - AWWA Annual Conference
A digital ground-water flow model of the southern High Plains of Texas and New Mexico has been constructed. The calibrated model with the 1980 water level as the initial condition was used to project water levels to 2020. Estimated future pumpage based on the U. S. Economic Development Administration's economic...
Methods of Fitting a Straight Line to Data: Examples in Water Resources
Robert M. Hirsch, Edward J. Gilroy
1984, Water Resources Bulletin (20) 705-711
Three methods of fitting straight lines to data are described and their purposes are discussed and contrasted in terms of their applicability in various water resources contexts. The three methods are ordinary least squares (OLS), least normal squares (LNS), and the line of organic correlation (OC). In all three methods...
A standard-reference water-suspended sediment sample for total recoverable metals
Marvin J. Fishman, Bernard A. Malo, Delora K. Boyle
1984, Journal of Testing and Evaluation (12) 182-186
The U.S. Geological Survey has been preparing and maintaining a library of standard-reference water samples for dissolved inorganic constituents for 19 years. Recently, the reference-sample program was expanded to include a water-suspended sediment mixture for the determination of total recoverable metals. An interlaboratory round-robin study was conducted. Digestion procedures used...
Fission-track dating applied to mineral exploration
C. W. Naeser
1984, Nuclear Tracks and Radiation Measurements (1982) (10) 422
The partial to total resetting of fission-track ages of minerals in country rock near a mineralized area can be used to (1) locate a thermal anomaly, and (2) date the mineralizing event. Two mining districts in Colorado have been studied - Rico and Gilman. Rico is a precious- and base-metal...
Comparison of sediments and organisms in identifying sources of biologically available trace metal contamination
E.A. Thomson, Samuel N. Luoma, C.E. Johansson, D.J. Cain
1984, Water Research (18) 755-765
Sediments and an indicator organism (Macoma balthica, a deposit-feeding bivalve) were used to assess the relative importance of secondary sewage, urban runoff, a landfill containing metal-enriched ash wastes and a yacht harbor in contributing to Ag, Cu and Zn enrichment in South San Francisco Bay. Spatial gradients in sediments and...
Laboratory studies of volcanic jets
S. W. Kieffer, B. Sturtevant
1984, Journal of Geophysical Research Solid Earth (89) 8253-8268
The study of the fluid dynamics of violent volcanic eruptions by laboratory experiment is described, and the important fluid-dynamic processes that can be examined in laboratory models are discussed in detail. In preliminary experiments, pure gases are erupted from small reservoirs. The gases used are Freon 12 and Freon 22,...
TECHNIQUE FOR ENHANCING DIGITAL COLOR IMAGES BY CONTRAST STRETCHING IN MUNSELL COLOR SPACE.
Fred A. Kruse, Gary L. Raines
1984, Conference Paper
The Munsell color system can be used to further enhance the appearance of high-quality digital color-composite images. A color-balanced 'standard' color-composite image is first produced using any desired contrast stretching algorithm. The stretched digital data are then transformed into the cylindrical Munsell color space. An enhanced version of a color-composite...
Sedimentary structures formed in sand by surface tension on melting hailstones
D. M. Rubin, R. E. Hunter
1984, Journal of Sedimentary Petrology (54) 581-582
Craters form when hailstones impact sand. When a hailstone melts, wet but unsaturated sand within the crater is attracted to the hailstone surface by surface tension. Shrinkage of the melting hailstone then produces one or more rings of sand within the impact crater.--Modified...
User guide for the USGS aerial camera Report of Calibration.
W.P. Tayman
1984, Photogrammetric Engineering and Remote Sensing (50) 577-584
Calibration and testing of aerial mapping cameras includes the measurement of optical constants and the check for proper functioning of a number of complicated mechanical and electrical parts. For this purpose the US Geological Survey performs an operational type photographic calibration. This paper is not strictly a scientific paper but...
The heat capacities of osumilite from 298.15 to 1000 K, the thermodynamic properties of two natural chlorites to 500 K, and the thermodynamic properties of petalite to 1800 K.
B. S. Hemingway, R. A. Robie, J.A. Kittrick, E.S. Grew, J.A. Nelen, D. London
1984, American Mineralogist (69) 701-710
Modifications to an automated low-T, adiabatic calorimeter are described. Thermodynamic data obtained with this instrument are reported for minerals from metamorphic terrains. (U.S. Bureau of Mines Report of Investigations 8451)-J.A.Z....
The side-looking airborne radar program of the US Geological Survey ( Appalachian Mountains).
C.S. Southworth
1984, Photogrammetric Engineering and Remote Sensing (50) 1467-1470
SLAR images are being analysed by the USGS to support mapping of geologic structures in the folded and thrust-faulted Appalachian Mountains, geological hazard appraisal, and monitoring of foliage cover for use in geological research. Four examples of SLAR imagery acquired during the 1982 flight program are illustrated and discussed.-R.House...
Deformation, geochemistry, and origin of massive sulfide deposits, Gossan lead district, Virginia
J. E. Gair, J. F. Slack
1984, Economic Geology (79) 1483-1520
The Gossan Lead district is a 28-km-long, northeast-trending belt of discontinuous massive sulfide deposits in the Blue Ridge province of southwestern Virginia. The deposits, hosted by the Ashe Formation of late Proterozoic age, consist of strata-bound lenses and layers of massive pyrrhotite, minor chalcopyrite, sphalerite, and pyrite, and rare arsenopyrite...
EFFECTS OF LOCALIZED AQUIFER BOILING ON FLUID PRODUCTION AT CERRO PRIETO.
Alfred H. Truesdell, Franco D’Amore, David Nieva
1984, Conference Paper, Transactions - Geothermal Resources Council
Localized aquifer boiling in the shallow two-phase reservoir of Cerro Prieto has produced excess steam and increased electrical output. Unfortunately it has also caused near-well mineral deposition that has decreased permeability and fluid flow. Inflow of cold water has limited the extent of aquifer boiling and permeability loss. The deeper...
A simple model of ice segregation using an analytic function to model heat and soil-water flow
T. V. Hromadka II, G. L. Guymon
1984, Journal of Energy Resources Technology, Transactions of the ASME (106) 515-520
For slowly moving freezing fronts in soil, the heat-transport equation may be approximated by the Laplacian of temperature. Consequently, potential theory may be assumed to apply and the temperature state can be approximated by an analytic function. The movement of freezing fronts may be approximated by a time-stepped solution of...
Effect of organic contamination upon microbial distributions and heterotrophic uptake in a Cape Cod, Massachusetts, aquifer
R.W. Harvey, R. L. Smith, L. George
1984, Applied and Environmental Microbiology (48) 1197-1202
No abstract available....
PREDICTING GROUND-WATER DRAINAGE TO SURFACE MINES.
Linda S. Weiss, Devin L. Galloway
Schreiber David L., editor(s)
1984, Conference Paper
A two-dimensional, finite-difference numerical model is used to simulate the drainage of ground water into a surface coal mine. Graphs of dimensionless head as a function of dimensionless distance, and dimensionless seepage flux as a function of dimensionless time are developed from results of the numerical modeling. Changes in seepage...
APPLICATION OF SPATIAL INFORMATION TECHNOLOGY TO PETROLEUM RESOURCE ASSESSMENT ANALYSIS.
Betty M. Miller, Michael A. Domaratz
1984, Conference Paper
Petroleum resource assessment procedures require the analysis of a large volume of spatial data. The US Geological Survey (USGS) has developed and applied spatial information handling procedures and digital cartographic techniques to a recent study involving the assessment of oil and gas resource potential for 74 million acres of designated...
The solubility of strontianite (SrCO3) in CO2-H2O solutions between 2 and 91°C, the association constants of SrHCO+3(aq) and SrCO03(aq) between 5 and 80°C, and an evaluation of the thermodynamic properties of Sr2+(aq) and SrCO3(cr) at 25°C and 1 atm total pressure
Eurybiades Busenberg, Niel Plummer, Vivian B. Parker
1984, Geochimica et Cosmochimica Acta (48) 2021-2035
Seventy new measurements (SrT-Pco2 of the solubility of strontianite were used to evaluate the equilibrium constant for the reaction SrCO3(cr) = Sr2+(aq) + CO2−3(aq) between 2 and 91 °C. The temperature dependence of the equilibrium constant is given by the expression Log K = 155.0305 − 7239.594/T − 56.58638 log T where T is in degrees Kelvin. The log K of strontianite,...
Computer-assisted cartography: an overview.
S.C. Guptill, L.E. Starr
1984, South African Journal of Photogrammetry, Remote Sensing & Cartography (14) 13-18
An assessment of the current status of computer-assisted cartography, in part, is biased by one's view of the cartographic process as a whole. From a traditional viewpoint we are concerned about automating the mapping process; from a progressive viewpoint we are concerned about using the tools of computer science to...
Determination of uranium concentration in water by liquid anion exchange-delayed neutron analysis
R. A. Zielinski, D. M. McKown
1984, Journal of Radioanalytical and Nuclear Chemistry (84) 207-212
Dissolved uranium is selectively removed from 11 of filtered, acidified water using a liquid anion exchange resin (Amberlite LA-1) dissolved in 10 ml of purified kerosene. The organic phase is then analyzed by a standard delayed neutron counting technique. Yields of removed uranium are consistently greater than 90 percent over...
Comparative geochronology in the reversely zoned plutons of the Bottle Lake Complex, Maine: U-Pb on zircons and Rb-Sr on whole rocks
R. A. Ayuso, Joseph G. Arth, A.K. Sinha, J. Carlson, D. R. Wones
1984, Contributions to Mineralogy and Petrology (88) 113-125
The Bottle Lake Complex is a composite granitic batholith emplaced into Cambrian to Lower Devonian metasedimentary rocks. Both plutons (Whitney Cove and Passadumkeag River) are very coarse grained hornblende and biotite-bearing granites showing petrographic and geochemical reverse zonation. Two linear whole rock Rb/Sr isochrons on xenolith-free Whitney Cove and Passadumkeag...
Contrasting fluid/rock interaction between the Notch Peak granitic intrusion and argillites and limestones in western Utah: evidence from stable isotopes and phase assemblages
P.I. Nabelek, T.C. Labotka, J. R. O’Neil, J. J. Papike
1984, Contributions to Mineralogy and Petrology (86) 25-34
The Jurassic Notch Peak granitic stock, western Utah, discordantly intrudes Cambrian interbedded pure limestones and calcareous argillites. Contact metamorphosed argillite and limestone samples, collected along traverses away from the intrusion, were analyzed for ??18O, ??13C, and ??D. The ??13C and ??18O values for the limestones remain constant at about 0.5...
Modification of wave-cut and faulting-controlled landforms
Thomas C. Hanks, R.C. Bucknam, K. R. Lajoie, R. E. Wallace
1984, Journal of Geophysical Research Solid Earth (89) 5771-5790
From a casual observation that the form of degraded fault scarps resembles the error function, this investigation proceeds through an elementary diffusion equation representation of landform evolution to the application of the resulting equations to the modern topography of scarplike landforms. The morphologic observations can be analyzed either in the...
Flooding in northwestern Hillsborough and southern Pasco counties, Florida, in 1979
W. R. Murphy Jr., R. P. Evans, James K. Whalen
1984, Open-File Report 82-96
Heavy rainfall in the late spring and summer of 1979 caused severe flooding in northwestern Hillsborough and southern Pasco counties, including north Tampa. May 7-9 rainfall for some stations had a recurrence interval in excess of 100 years; the August and September rainfall total had a recurrence interval in excess...
