Isotopic evidence for glacial meltwater recharge to the Cambrian-Ordovician aquifer, north-central United States
D. I. Siegel, R.J. Mandle
1984, Quaternary Research (22) 328-335
The chemistry of water in the Cambrian-Ordovician aquifer in six midwestern states has been studied as part of the Northern Midwest Regional Aquifer-System Analysis of the U.S. Geological Survey. Dissolved-solids concentrations generally increase perpendicular to the direction of regional groundwater flow, from less than 400 mg/liter in southeast Minnesota, southwest...
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...
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...
Oldest (Early Tertiary) subsurface carbonate rocks of St. Croix, USVI, revealed in a turbidite-mudball.
B. H. Lidz
1984, Journal of Foraminiferal Research (14) 213-227
Ranging in age from early Eocene to early Miocene and younger, pelagic foraminifers form the major component of a phenoclastic mudball within a fossiliferous turbidite. The turibidite is part of a more than 12m-thick section of biogenic deposits of middle Miocene age.-from Author...
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...
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...
Potential flow through channel constriction.
J. K. Lee
1984, Journal of Hydraulic Engineering (110) 515-520
Potential flow through an eccentric, normal constriction of zero thickness in an infinitely long, straight channel of constant width and unit depth is studied by use of a Schwarz-Christoffel transformation. The transformation is integrated by a direct approach. Parametric equations for streamlines are obtained and used to compute an average...
LANDSAT M. S. S. IMAGE MOSAIC OF TUNISIA.
J. C. Boswell-Thomas
Cook Jerald J., editor(s)
1984, Conference Paper, Proceedings of the International Symposium on Remote Sensing of Environment
The Landsat mosaic of Tunisia funded by USAID for the Remote Sensing Laboratory, Soils Division, Ministry of Agriculture, Tunisia, was completed by the USGS in September 1983. It is a mixed mosaic associating digital corrections and enhancements to manual mosaicking and corresponding to the Tunisian request for high resolution and...
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....
MINERALOGICAL STUDIES OF THE HYDROTHERMAL SYSTEM IN NEWBERRY VOLCANO DRILL HOLE 2, OREGON.
Terry E.C. Keith, Keith E. Bargar, Stephen S. Howe, William W. Carothers, Ivan Barnes
1984, Conference Paper, Transactions - Geothermal Resources Council
Studies of secondary mineral distribution, whole-rock chemical compositions, isotopes, and fluid inclusions are being conducted on the core from Newberry Volcano drill hole 2. Rocks from the drill core are divided into 3 major intervals on the basis of their alteration pattern, which is controlled by rock permeabilities, primary lithologies,...
Hydrogeochemistry of Big Soda Lake, Nevada: An alkaline meromictic desert lake
Y.K. Kharaka, S.W. Robinson, LeRoy M. Law, W.W. Carothers
1984, Geochimica et Cosmochimica Acta (48) 823-835
Big Soda Lake, located near Fallon, Nevada, occupies an explosion crater rimmed by basaltic debris; volcanic activity apparently ceased within the last 10,000 years. This lake has been selected for a detailed multidisciplinary study that will ultimately cover the organic and inorganic hydrogeochemistry of water and sediments because the time...
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...
Floods of April 18, 1983 on St. Thomas and St. John, U.S. Virgin Islands
R. E. Curtis Jr.
1984, Water-Resources Investigations Report 84-4184
The U.S. Virgin Islands of St. Thomas and St. John experienced the most intense rainfall event in recorded history on April 18, 1983. Rainfall intensities of 2.5 inches per hour, and more than 16 inches in 18 hours were recorded. Almost instantaneous runoff caused widespread flooding near the coastlines of...
New data for iimoriite.
E.E. Foord, M.H. Staatz, N. M. Conklin
1984, American Mineralogist (69) 196-199
In its first reported occurrence outside of Japan, iimoriite, Y2(SiO4)(CO3), has been found in a thorite- and uraninite-bearing quartz and albite vein from Bokan Mountain on Prince of Wales Island, Alaska. It occurs as buff-tan subhedral and anhedral grains, 0.01-0.5 mm in diameter, with vitreous lustre, white streak, and H....
Evolution of the yardangs at Rogers Lake, California
A. W. Ward, R. Greeley
1984, Geological Society of America Bulletin (95) 829-837
Yardangs are streamlined, wind-eroded hills common to most deserts. Yardangs at Rogers Lake, Mojave Desert, California, have streamlined forms characteristic of objects eroded by moving fluids, a teardrop shape that approaches an ideal 1:4 width-to-length ratio. In wind-tunnel simulations, miniature forms of various...
On the treatment of evapotranspiration, soil moisture accounting, and aquifer recharge in monthly water balance models
William M. Alley
1984, Water Resources Research (20) 1137-1149
Several two- to six-parameter regional water balance models are examined by using 50-year records of monthly streamflow at 10 sites in New Jersey. These models include variants of the Thornthwaite-Mather model, the Palmer model, and the more recent Thomas abcd model. Prediction errors are relatively similar among the models. However, simulated values...
CHARACTERIZATION OF SECONDARY ALTERATION IN THE COLUMBIA RIVER BASALT BY BACKSCATTERED ELECTRON IMAGING AND ENERGY-DISPERSIVE X-RAY SPECTROSCOPY.
P.P. Hearn, W.C. Steinkampf, Z. A. Brown
Romig Alton D.Jr.Goldstein Joseph I., editor(s)
1984, Conference Paper, Proceedings, Annual Conference - Microbeam Analysis Society
The thick sequences of flood basalts which underlie the Columbia River basin are important aquifiers, providing water for both agricultural and domestic use. Secondary alteration in these rocks occurs primarily as coatings or fillings in fractures and vesicles; alteration is generally believed to have occurred at low temperatures ( less...
Carbon and its isotopes in mid-oceanic basaltic glasses
D.J. Des Marais, J.G. Moore
1984, Earth and Planetary Science Letters (69) 43-57
Three carbon components are evident in eleven analyzed mid-oceanic basalts: carbon on sample surfaces (resembling adsorbed gases, organic matter, or other non-magmatic carbon species acquired by the glasses subsequent to their eruption), mantle carbon dioxide in vesicles, and mantle carbon dissolved...
Long-term observations of bottom conditions and sediment movement on the Atlantic continental shelf; time-lapse photography from instrumented tripod
Bradford Butman, Cynthia G. Bryden, Stephanie L. Pfirman, William J. Strahle, Marlene A. Noble
1984, Conference Paper
An instrument system that measures bottom current, temperature, light transmission, and pressure, and that photographs the bottom at 2- to 6-hour intervals has been developed to study sediment transport on the Atlantic Continental Shelf. Instruments have been deployed extensively along the United States East Coast Continental Shelf for periods of...
LASER MICROPROBE **4**0Ar/**3**9Ar DATING OF MINERAL GRAINS IN SITU.
J. F. Sutter, Jack B. Hartung
1984, Scanning Electron Microscopy 1525-1529
A laser-microprobe attached to a mass spectrometer for **4**0Ar/**3**9Ar age determination of single mineral grains in geological materials has been made operational at the US Geological Survey, Reston, VA. This microanalytical technique involves focusing a pulsed laser beam onto a sample contained in an ultra-high vacuum chamber attached to a...
Spectral properties of ice‐particulate mixtures and implications for remote sensing: 1. Intimate mixtures
Roger N. Clark, Paul G. Lucey
1984, Journal of Geophysical Research: Solid Earth (89) 6341-6348
The spectral properties of water ice-particulate mixtures are studied for the purpose of deriving the ice and particulate abundances from remotely obtained spectra (particulates referring to nonicy materials in the form of grains). Reflectance levels and ice absorption band depths are a complex function of the single scattering albedo of...
Field and laboratory analyses of water from the Columbia aquifer in Eastern Maryland
L. J. Bachman
1984, Groundwater (22) 460-469
Field and laboratory analyses of pH, alkalinity, and specific conductance from water samples collected from the Columbia aquifer on the Delmarva Peninsula in eastern Maryland were compared to determine if laboratory analyses could be used for making regional water-quality interpretations.On the basis of 170 field...
The complex variable boundary element method: Applications in determining approximative boundaries
T. V. Hromadka II
1984, Engineering Analysis (1) 218-222
The complex variable boundary element method (CVBEM) is used to determine approximation functions for boundary value problems of the Laplace equation such as occurs in potential theory. By determining an approximative boundary upon which the CVBEM approximator matches the desired constant (level curves) boundary conditions, the CVBEM is found to...
Origins and exploration significance of replacement and vein-type alunite deposits in the Marysvale volcanic field, west central Utah
C. G. Cunningham, R. O. Rye, T. A. Steven, H. H. Mehnert
1984, Economic Geology (79) 50-71
Alunite deposits formed 23 m.y. ago in near-surface, highly oxidizing conditions at the tops of hydrothermal plumes that were spaced at 3- to 4-km intervals around a monzonite stock. The delta 34 S values of 11.5 to 15.4 per mil for replacement alunite along with geologic constraints indicate that sulfate sulfur was...
