Effects of hydraulic borehole mining on ground water at a test site in northeast St Johns County, Florida
P. S. Hampson
1984, Water-Resources Investigations Report 83-4149
An experimental mining project was conducted in northeast St. Johns County, Florida, to determine the feasibility of extracting deeply buried phosphate ore by hydraulic borehole mining techniques. The phosphate zone is between 232 and 250 feet below land surface and consists of approximately equal proportions of fine-grained phosphate, sand, and...
Geologic and hydrologic data collected during 1976-1983 at the Sheffield low-level radioactive waste disposal site and adjacent areas, Sheffield, Illinois
J.B. Foster, George Garklavs, G.W. Mackey
1984, Open-File Report 83-926
Hydrogeologic studies were conducted at the low-level radioactive-waste disposal site near Sheffield, Illinois, from 1976-84. Data in this report include water levels in wells, lake stages, inorganic, organic, and radiometric chemical analyses of ground and surface water, hydraulic conductivities of glacial materials, grain-size distribution, clay and carbonate mineralogy, and cation...
Interpretation of core and well log physical property data from drill hole UPH-3, Stephenson County, Illinois
J.J. Daniels, G.R. Olhoeft, J. H. Scott
1984, Open-File Report 82-941
Laboratory and well log physical property measurements show variations in the mineralogy with depth in UPH-3. Gamma ray values generally decrease with depth in the drill hole, corresponding to a decrease in the felsic mineral components of the granite. Correspondingly, an increase with depth in mafic minerals in the granite...
Canyon-filling lavas and lava dams on the Boise River, Idaho, and their significance for evaluating downcutting during the last 2 million years
Keith A. Howard, John W. Shervais, E.H. McKee
Bill Bonnichsen, R.M. Breckenridge, editor(s)
1984, Report, Cenozoic geology of Idaho
Basalts that periodically dammed the Boise River and its South Fork over the last 2 million years reveal the canyon history and illustrate how lava interacted with impounded river water. Intracanyon basalt flows record a granite canyon successively filled by lava and then recut at least five times in the...
Cenozoic plate motions and the volcano-tectonic evolution of western Oregon and Washington
Ray E. Wells, David C. Engebretson, P. D. Snavely Jr., R. S. Coe
1984, Tectonics (3) 275-294
A refined northeast Pacific plate-motion model provides a framework for analysis of the Tertiary volcanic and tectonic history of western Oregon and Washington. We examine three possible models for the origin of the allochthonous Paleocene and Eocene oceanic basalt basement of the Coast Range: (1) accretion to the continent of...
Mineral resources of the Atlantic Exclusive Economic Zone
William P. Dillon
1984, Conference Paper, Oceans Conference Record (IEEE)
Potential mineral resources of the Atlantic Exclusive Economic Zone (including the Gulf of Mexico and US Caribbean areas) include petroleum, sand and gravel, phosphorite, placer deposits of heavy mineral sands, ferromanganese nodules, and fresh water. Although major efforts have been made to search for petroleum, the oil and gas resources...
Causes of acidification of four streams on Laurel Hilld in southwestern Pennsylvania
William E. Sharpe, David R. DeWalle, Robert T. Leibfried, Richard S. Dinicola, William G. Kimmel, Lysle S. Sherwin
1984, Journal of Environmental Quality (13) 619-631
Atmospheric deposition, soils developed from bedrock, a natural bog, gas wells, and a ski area were all investigated as possible sources of water quality degradation for four streams on Laurel Hill in southwestern Pennsylvania where fish kills have been reported since 1960. An intensive study of the chemistry of atmospheric...
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...
RECOMMENDATIONS FROM THE DEPARTMENT OF THE INTERIOR - EEZ SYMPOSIUM.
Robert W. Rowland, Bonnie A. McGregor
1984, Conference Paper, Oceans Conference Record (IEEE)
The Presidential proclamation on March 10, 1983, of a 200-nautical-mile-wide Exclusive Economic Zone (EEZ) focuses attention on the mineral resources of a vast submarine area. The hard-mineral resources in the EEZ include shallow-water placer deposits, polymetallic sulfide deposits, and cobalt-enriched manganese crusts in deeper water. The petroleum resource potential of...
Paleomagnetic constraints on the interpretation of early Cenozoic Pacific Northwest paleogeography
Ray E. Wells
1984, Pacific Section S.E.P.M. (42) 231-237
Widespread Cenozoic clockwise tectonic rotation in the Pacific Northwest is an established fact; however, the geologic reconstructions based on these rotations are the subject of continuing debate. Three basic mechanisms have been proposed to explain the rotations: (1) simple shear rotation of marginal terranes caught in the dextral shear couple...
Geophysical methods as mapping tools in a strata-bound gold deposit: Haile mine, South Carolina slate belt
J. C. Wynn, R.W. Luce
1984, Economic Geology (79) 382-388
Very low frequency electromagnetic, magnetic, and induced polarization methods. The very low frequency electromagnetic resistivity data show high resistivity zones that correlate with siliceous units known to host the gold. The magnetic data clearly identify the mafic and ultramafic dikes which cut metasediments and also fill faults that offset them....
Magmatic inclusions in rhyolites, contaminated basalts, and compositional zonation beneath the Coso volcanic field, California
C. R. Bacon, J. Metz
1984, Contributions to Mineralogy and Petrology (85) 346-365
Basaltic lava flows and high-silica rhyolite domes form the Pleistocene part of the Coso volcanic field in southeastern California. The distribution of vents maps the areal zonation inferred for the upper parts of the Coso magmatic system. Subalkalic basalts (<50% SiO2) were erupted well away from the rhyolite field...
Ferromanganese nodules from MANOP Sites H, S, and R-Control of mineralogical and chemical composition by multiple accretionary processes
J. Dymond, M. Lyle, B. Finney, D.Z. Piper, K. Murphy, R. Conard, N. Pisias
1984, Geochimica et Cosmochimica Acta (48) 931-949
The chemical composition of ferromanganese nodules from the three nodule-bearing MANOP sites in the Pacific can be accounted for in a qualitative way by variable contributions of distinct accretionary processes. These accretionary modes are:1.(1) hydrogenous, i.e., direct precipitation or accumulation of colloidal metal oxides in seawater,2.(2)...
Resin rodlets in shale and coal (Lower Cretaceous), Baltimore Canyon Trough
P.C. Lyons, Patrick G. Hatcher, J.A. Minkin, C.L. Thompson, R.R. Larson, Z. A. Brown, R.N. Pheifer
1984, International Journal of Coal Geology (3) 257-278
Rodlets, occurring in shale and coal (uppermost Berriasian to middle Aptian, Lower Cretaceous), were identified from drill cuttings taken from depths between 9330 ft (2844 m) and 11, 460 ft (3493 m) in the Texaco et al., Federal Block 598, No....
Fluid heterogeneity during granulite facies metamorphism in the Adirondacks: stable isotope evidence
J.W. Valley, J. R. O’Neil
1984, Contributions to Mineralogy and Petrology (85) 158-173
The preservation of premetamorphic, whole-rock oxygen isotope ratios in Adirondack metasediments shows that neither these rocks nor adjacent anorthosites and gneisses have been penetrated by large amounts of externally derived, hot CO2-H2O fluids during granulite facies metamorphism. This conclusion is supported by calculations of the effect of fluid volatilization and...
Characterization of the oil shale of the New Albany Shale in Indiana
R. K. Leininger, J.G. Hailer, N.R. Shaffer
1984, Conference Paper, Preprints
In the 1920's chemical and mineralogic characterization of the New Albany Shale (Mississippian-Devonian) in Indiana showed the dark shale to be rich in organic material and have commercial possibilities. Projects in the 1960's resulted in disparaging descriptions of exiguous fossil record, monotonous mineralogy, and intractable chemistry. Since 1978 expanded efforts...
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...
Characteristics that distinguish types of epithermal deposits
D.O. Hayba, N.K. Foley, P. Heald-Wetlaufer
1984, Journal of Geochemical Exploration (25) 231-231
Three distinctive groupings of epithermal deposits were recognized from a literature study of fifteen well-described precious- and base-metal epithermal districts, supplemented by L. J. Buchanan's 1981 compilation of data from 47 less completely documented deposits. The three groups are distinguished primarily by the type of alteration and the sulfur fugacity...
Potential effects of surface coal mining on the hydrology of the West Otter area, Ashland and Birney-Broadus coal fields, southeastern Montana
N. E. McClymonds
1984, Water-Resources Investigations Report 84-4087
Shallow aquifers exist primarily within the Tongue River Member of the Paleocene Fort Union Formation and within valley alluvium. Sandstone beds are the principal aquifers for domestic supply and livestock watering, with the Knobloch coal bed being a secondary source of supply. Surface-water resources consist principally of perennial flow in...
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...
Reconnaissance geochemical assessment of metallic mineral resource potential, Riordan's Well Wilderness Study Area (NV 040-166), Nye County, Nevada
A. H. Hofstra, E. L. Rowan, G.W. Day
1984, Open-File Report 84-781
No abstract available....
Sources of nitrate in ground water in a sewered housing development, Central Long Island, New York
W.J. Flipse Jr., B. G. Katz, J.B. Lindner, R. Markel
1984, Groundwater (22) 418-426
Nitrate concentrations in ground water on Long Island, New York, have increased markedly in the last 30 years. A significant amount of this increase has been attributed to lawn and garden fertilizers in addition to cesspool and septic-tank discharges. The increase in nitrate concentration is...
Geochronology of Precambrian granites and associated U-Ti-Th mineralization, northern Olary province, South Australia
K.R. Ludwig, J.A. Cooper
1984, Contributions to Mineralogy and Petrology (86) 298-308
Proterozoic granitoids and metamorphic rocks in the Olary province of the Willyama block of South Australia host ore-grade amounts of U-Th-Ti and U-Fe-Ti-Th minerals. U-Pb-Th isotope analyses on zircons from all granitoids associated with the Crocker Well brannerite deposit indicate that these granitoids were intruded within a short time span,...
Book review: Geomagnetism of baked clays and recent sediments
Edward A. Mankinen
1984, Eos, Transactions, American Geophysical Union (65) 787-787
This book is an outgrowth of the symposium entitled “Time Scales of Geomagnetic Secular Variations,” which was held at the 4th Assembly of the International Association of Geomagnetism and Aeronomy (Edinburgh, U.K., August 1981). The volume includes many of the papers presented, which described paleomagnetic results from both archeologic materials...
Implications of paleomagnetism for the tectonic history of the Eastern Klamath and related terranes in California and Oregon
Edward A. Mankinen, William P. Irwin, C. Sherman Gromme
T. H. Nilsen, editor(s)
1984, Pacific Section S.E.P.M. (42) 221-229
Paleomagnetic study of Permian to Jurassic volcanic and sedimentary strata of the Eastern Klamath terrane has shown the remanent magnetism of these rocks to be prefolding and primary. The Permian and Triassic rocks are both indicated to have rotated 100° clockwise, while the Jurassic strata have rotated 60° clockwise. The...
