Forecasting rates of hydrocarbon discoveries in a changing economic environment
J.H. Schuenemeyer, E. D. Attanasi
1984, Marine and Petroleum Geology (1) 313-318
A method is presented for the estimation of undiscovered oil and gas resources in partially explored areas where economic truncation has caused some discoveries to go unreported; therefore distorting the relationship between the observed discovery size distribution and the parent or ultimate field size distribution. The method is applied 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...
EFFECTS OF RESOURCE DEVELOPMENT ON WATER QUALITY IN THE BIG SOUTH FORK NATIONAL RIVER AND RECREATION AREA, TENNESSEE AND KENTUCKY.
William P. Carey
Schreiber David L., editor(s)
1984, Conference Paper
The South Fork Cumberland River begins in Tennessee at the confluence of the New River and Clear Fork. Strip mining for coal in the New River basin has been ongoing for decades with little reclamation prior to 1977. Water-quality data show that suspended-sediment and dissolved-constituent loads from the New River...
Evaluation of the National Archives program to convert nitrate aerial photographs of the United States to a stable-base safety film.
R.S. Williams Jr., T.R. Lyons, J.G. Ferrigno, M.C. Quinn
1984, Photogrammetric Engineering and Remote Sensing (50) 1437-1441
Discusses the programme on reproducing the 1930's and early 1940's nitrate aerial photographs of large areas of the US onto stable-base safety film, and the proceedings of a February 1981 meeting at the National Archives and Records Service, General Services Administration, which discussed the programme and inspected the results of...
Evaluation of ryegrass cover crops in rearing ponds for Florida largemouth bass
C.W. Bowling, W.P. Rutledge, J. G. Geiger
1984, Progressive Fish-Culturist (46) 55-57
No abstract available. ...
Submarine sand dunes and sedimentary environments in Oceanographer Canyon.
P. C. Valentine, R.A. Cooper, J. R. Uzmann
1984, Journal of Sedimentary Petrology (54) 704-715
Observations from research submersibles in the northern part of Oceanographer Canyon reveal the presence of an extensive field of large sand dunes on the canyon floor. The dunes are medium to coarse sand, are oriented across the axis, and the largest of them are as high as 3 m and...
Great Salt Lake, and precursors, Utah: The last 30,000 years
R. J. Spencer, M.J. Baedecker, H.P. Eugster, R. M. Forester, M. B. Goldhaber, B.F. Jones, K. Kelts, J. McKenzie, D.B. Madsen, S.L. Rettig, M. Rubin, C.J. Bowser
1984, Contributions to Mineralogy and Petrology (86) 321-334
Sediment cores up to 6.5 m in length from the South Arm of Great Salt Lake, Utah, have been correlated. Radiocarbon ages and volcanic tephra layers indicate a record of greater than 30,000 years. A variety of approaches have been employed to collect data used in stratigraphic correlation and lake...
The Palmer Drought Severity Index: limitations and assumptions.
W.M. Alley
1984, Journal of Climate and Applied Meteorology (23) 1100-1109
The structure of the Palmer Drought Severity Index (PDSI), which is perhaps the most widely used regional index of drought, is examined. The PDSI addresses two of the most elusive properties of droughts: their intensity and their beginning and ending times. Under certain conditions, the PDSI values are very sensitive...
Simulation of ground-water flow in a mined watershed in eastern Ohio
J. S. Weiss, A. C. Razem
1984, Groundwater (22) 549-560
A 43-acre watershed in Muskingum County, Ohio, was studied to determine the hydrologic consequences of strip mining for coal. A quantitative description of the effects on the ground-water flow components of the hydrologic system has been obtained using digital models.The premining watershed was characterized by...
Paleogene geology and chronology of southwestern Umnak Island, Aleutian Islands, Alaska
H. McLean, J.R. Hein
1984, Canadian Journal of Earth Sciences (21) 171-180
The rocks of southwestern Umnak Island (Nikolski area) consist mainly of a slightly deformed marine sedimentary sequence intruded by hypabyssal quartz diorite sills and small plutons. Laminated and thin-bedded argillaceous and tuffaceous mudstone and siltstone reflect volcanic arc sedimentation from late Eocene to early Oligocene time. Zeolite facies minerals formed...
ASSESSMENT OF HIGH-TEMPERATURE GEOTHERMAL RESOURCES IN HYDROTHERMAL CONVECTION SYSTEMS IN THE UNITED STATES.
Manuel Nathenson
1984, Conference Paper, Proceedings of the Intersociety Energy Conversion Engineering Conference
The amount of thermal energy in high-temperature geothermal systems (>150 degree C) in the United States has been calculated by estimating the temperature, area, and thickness of each identified system. These data, along with a general model for recoverability of geothermal energy and a calculation that takes account of the...
Coalification of organic matter in coal balls of the Pennsylvanian (upper Carboniferous) of the Illinois Basin, United States
Paul C. Lyons, Carolyn L. Thompson, Patrick G. Hatcher, F. W. Brown, M.A. Millay, Nikolaus Szeverenyi, G.E. Maciel
1984, Organic Geochemistry (5) 227-239
An evaluation was made of the degree of coalification of two coal balls from the Illinois Basin of the Pennsylvanian (upper Carboniferous) of the United States. Previous interpretations are mainly misleading and contradictory, primarily because of the assumption that the brown color and exceptional cellular and subcellular preservation typical of...
A review of progress in understanding the fluid geochemistry of the Cerro Prieto geothermal system
A.H. Truesdell, N.L. Nehring, J. M. Thompson, C. J. Janik, T.B. Coplen
1984, Geothermics (13) 65-74
Fluid geochemistry has played a major role in our present understanding of the Cerro Prieto geothermal system. Fluid chemical and isotopic compositions have been used to indicate the origin of water, salts and gases, original subsurface temperature and fluid flow, fluid-production mechanisms, and production-induced aquifer boiling and cold-water entry. The...
Flameless atomic absorption determination of platinum, palladium, and rhodium in geologic materials
Philip Aruscavage, F.O. Simon, R. Moore
1984, Geostandards Newsletter (8) 3-6
Platinum, palladium and rhodium have been determined in 18 U.S. Geological Survey reference materials by graphite furnace atomic absorption spectrometry after preconcentration by the classical leadfree assay technique. A comparison with literature values shows clearly the need for additional data on these samples before “best” values can be assigned....
Aquifer reclamation design: The use of contaminant transport simulation combined with nonlinear programing
Steven M. Gorelick, Clifford I. Voss, Philip E. Gill, Walter Murray, Michael A. Saunders, Margaret H. Wright
1984, Water Resources Research (20) 415-427
A simulation-management methodology is demonstrated for the rehabilitation of aquifers that have been subjected to chemical contamination. Finite element groundwater flow and contaminant transport simulation are combined with nonlinear optimization. The model is capable of determining well locations plus pumping and injection rates for groundwater quality control. Examples demonstrate linear...
Stable isotope geochemistry of acid mine drainage: Experimental oxidation of pyrite
B.E. Taylor, M.C. Wheeler, D. Kirk Nordstrom
1984, Geochimica et Cosmochimica Acta (48) 2669-2678
Sulfate and water from experiments in which pyrite was oxidized at a pH of 2.0 were analyzed for sulfur and oxygen stable isotopes. Experiments were conducted under both aerobic and anaerobic sterile conditions, as well as under aerobic conditions in the presence of Thiobacillus ferrooxidans, to elucidate the pathways of...
MAPPING IN MICRONESIA.
Randle W. Olsen, J.R. Swinnerton
1984, Conference Paper, Technical Papers of the American Congress of Surveying and Mapping
The U. S. Geological Survey has recently completed a series of new topographic maps of Micronesia in cooperation with the Trust Territory of the Pacific Islands, the Federal agency administering the islands. Monocolor 1:10,000-scale manuscripts were compiled, from which 1:25,000-scale metric quadrangles were derived with symbology consistent with USGS quadrangle...
Local gravity anomalies produced by dislocation sources
J.C. Savage
1984, Journal of Geophysical Research Solid Earth (89) 1945-1952
Rundle (1978) and Walsh and Rice (1979) have shown that the change in the vertical component of gravity is proportional to uplift for a spherical source of dilatation and for slip on an infinitely long dip-slip fault. In the first case, no free air gravity anomaly is produced and in...
Geomorphic and vegetative characteristics along three northern Virginia streams
W. R. Osterkamp, C.R. Hupp
1984, Geological Society of America Bulletin (95) 501-513
Geometry, sediment, and woody-vegetation data were collected from bottomland geomorphic surfaces at valley sections along three gaged perennial streams of northern Virginia. The basins of the streams differ widely in topography and physiography; mean discharges vary from 0.196 to 323 m3 per sec. Prevalent surfaces identified were the depositional bar, the...
Amino acid epimerization implies rapid sedimentation rates in Arctic Ocean cores
H.P. Sejrup, G. H. Miller, J. Brigham-Grette, R. Lovlie, D. Hopkins
1984, Nature (310) 772-775
The palaeooceanography of the Arctic Ocean is less well known than any other ocean basin, due to difficulties in obtaining cores and in providing a secure chronological framework for those cores that have been raised. Most recent investigators have suggested that low sedimentation rates (0.05-0.1 cm kyr-1) have characterized the...
Effect of anisotropy and groundwater system geometry on seepage through lakebeds. 1. Analog and dimensional analysis
H.O. Pfannkuch, T. C. Winter
1984, Journal of Hydrology (75) 213-237
Distribution of seepage through lakebeds is controlled partly by geometric configuration of the lake and of the groundwater system interacting with the lake. To evaluate the effect of these factors, conductive-paper electric-analog models were used to analyze a number of lake and groundwater...
Evolution of the MOSS geographic information system for 32-bit computer systems
R.J. Thompson, Lyndon R. Oleson
1984, Conference Paper
The authors discuss the current status and plans regarding the 32-bit implementation of the Map Overly and Statistical System (MOSS) geographic information system. Increasing interest in this system is promoting significant expansion of its capabilities, but any such enhancements will require careful analysis and planning to ensure that the resulting...
Mineralogy and chemistry of massive sulfide deposits from the Juan de Fuca Ridge
R.A. Koski, D.A. Clague, E. Oudin
1984, Geological Society of America Bulletin (95) 930-945
Six hydrothermal vent sites and associated benthic communities were located in the axial valley of the southern Juan de Fuca Ridge using transponder-navigated bottom photography. The hydrothermal deposits form ledges and shallow mounds within a central zone characterized by a linear bathymetric depression...
DISCRIMINATION OF GRANITOIDS AND MINERALIZED GRANITOIDS IN THE MIDYAN REGION, NORTHWESTERN ARABIAN SHIELD, SAUDI ARABIA, BY LANDSAT MSS DATA-ANALYSIS.
Philip A. Davis, Maurice J. Grolier
1984, Conference Paper
Landsat multispectral scanner (MSS) band and band-ratio databases of two scenes covering the Midyan region of northwestern Saudi Arabia were examined quantitatively and qualitatively to determine which databases best discriminate the geologic units of this semi-arid and arid region. Unsupervised, linear-discriminant cluster-analysis was performed on these two band-ratio combinations and...
Geomorphic domains and linear features on Landsat images, Circle quadrangle, Alaska
S. L. Simpson
1984, Open-File Report 83-170-E
A remote sensing study using Landsat images was undertaken as part of the Alaska Mineral Resource Assessment Program (AMRAP). Geomorphic domains A and B, identified on enhanced Landsat images, divide Circle quadrangle south of Tintina fault zone into two regional areas having major differences in surface characteristics. Domain A is...
