Implications of the petrochemistry of palladium at Iron Canyon, Lander County, Nevada
Norman J. Page, Ted G. Theodore
1978, Journal of Research of the U.S. Geological Survey (6) 107-114
Approximately one-half of the 270 samples from the Iron Canyon area, Nevada, analyzed for platinum-group metals, contain measurable amounts of palladium in the 0.001- to 0.02-part per million range with an average of 0.0034 ppm. The rocks include lower Paleozoic sedimentary and volcanic rocks, Tertiary granitic porphyries, and breccia, all...
Porphyry copper exploration model for northern Sonora, Mexico
Gary L. Raines
1978, Journal of Research of the U.S. Geological Survey (6) 51-58
The regional tectonic pattern of the porphyry copper province of northern Sonora, Mexico, is similar to, but more complex than, the Colorado mineral belt. Four northeast-trending shear zones, spaced at 30- to 50-kilometer intervals from Hermosillo, Mexico, north to Nogales, Mexico, are interpreted from analysis of lineament data from Landsat-1...
Map showing copper determined by atomic absorption in stream sediments, Ketchikan and Prince Rupert quadrangles, Alaska
Richard D. Koch, Raymond L. Elliott, M. J. Diggles
1978, Open-File Report 78-73-C
No abstract available....
Determination of silver, bismuth, cadmium, copper, lead, and zinc in geologic materials by atomic absorption spectrometry with tricaprylylmethylammonium chloride
John G. Viets
1978, Analytical Chemistry (50) 1097-1101
Interferences commonly encountered in the determination of silver, bismuth, cadmium, copper, lead, and zinc at crustal abundance levels are effectively eliminated using a rapid, sensitive, organic extraction technique. A potassium chlorate-hydrochloric acid digestion solubilizes the metals not tightly bound in the silicate lattice of rocks, soils, and stream sediments. The...
The architecture of the porphyry-metal system as a prospecting stratagem in the Southern Rocky Mountains
George J. Neuerburg
1978, Open-File Report 78-130
A model of the porphyry-metal system characteristic of the consanguineous Cretaceous and Tertiary igneous rocks and associated ores of the southern Rocky Mountains is constructed from the bits and pieces exposed in the Colorado mineral belt and the San Juan volcanic field. Hydrothermally altered rocks in a part of the...
Submarine faults and slides on the continental shelf, northern Gulf of Alaska
Paul R. Carlson, Bruce F. Molnia
1977, Marine Geotechnology (2) 275-290
Submarine faults and slides or slumps of Quaternary age are potential environmental hazards on the outer continental shelf (OCS) of the northern Gulf of Alaska. Most faults that approach or reach the seafloor cut strata that may be equivalent in age to the upper Yakataga Formation (Pliocene‐Pleistocene). Along several faults,...
Exploration geochemical studies of some sandstone copper-uranium deposits, Bradford, Columbia, and Lycoming Counties, Pa
F. G. Lesure, J. M. Motooka, P. L. Weis
1977, Journal of Research of the U.S. Geological Survey (5) 609-621
Semi-quantitative spectrographic analyses of mineralized and unmineralized sandstone, siltstone, and claystone from the Catskill Formation of Devonian age in Bradford, Columbia, and Lycoming Counties, Pa., suggest that copper, silver, and uranium are the principal metallic elements concentrated in the mineralized rock. Lead, mercury, and molybdenum may be concentrated slightly in...
Geochemical exploration techniques based on distribution of selected elements in rocks, soils, and plants, Vekol porphyry copper deposit area, Pinal County, Arizona
Maurice A. Chaffee
1977, Bulletin 1278-E
A summary of the mineral resources of the proposed Great Bear wilderness, Flathead, Teton, and Pondera counties, Montana
Melville Rhodes Mudge, Robert L. Earhart, Dudley D. Rice, Lawrence Y. Marks
1977, Open-File Report 77-95
The proposed Great Bear wilderness has a good potential for oil and gas (mainly gas), and a moderate potential for submarginal resources of copper and silver in a belt 25 miles (40 km) long and about 1 mile (1.6 km) wide that is partly within the study area along the...
Data from geologic investigations in the Yemen Arab Republic during 1976
Maurice J. Grolier, J. A. Domenico, Mary Donato, G. Chase Tibbitts Jr., W.C. Overstreet, Mohammad Mukred Ibrahim
1977, Open-File Report 77-733
The results of semiquantitative spectrographic analyses for 31 elements in 126 specimens of rocks from the Yemen Arab Republic, collected mainly during February 1976 from the Precambrian area in the southeastern part of the country, provide background data for use in geochemical evaluation of areas potentially favorable for mineral deposits....
Geochemical and generalized geologic map showing distribution of copper in the Round Mountain Quadrangle, Nye County, Nevada
D. R. Shawe
1977, Miscellaneous Field Studies Map 835-B
Igneous rocks and copper mineralization in the Ray porphyry copper district, Arizona
Henry Rowland Cornwall, Norman G. Banks
1977, Open-File Report 77-255
Map showing copper deposits of South America
G. H. Goudarzi (compiler)
1977, Miscellaneous Field Studies Map 868-F
The Alaskan Mineral Resource Assessment Program; background information to accompany folio of geologic and mineral resource maps of the McCarthy Quadrangle, Alaska
E. M. MacKevett, N. R. D. Albert, D.F. Barnes, J. E. Case, Keith Robinson, D.A. Singer
1977, Circular 739
The McCarthy 1? by 3? quadrangle, in eastern south-central Alaska, contains potentially significant resources of copper and possibly of a few other commodities. This circular and a companion folio of maps represent results of integrated field and laboratory studies in the disciplines of geology, geophysics, geochemistry, and satellite imagery that...
Some observations that bear on the origin of porphyry copper deposits
Norman G. Banks, Norman J. Page
1977, Open-File Report 77-127
Trophic conditions in Lake Winnisquam, New Hampshire
Leonard R. Frost Jr.
1977, Water-Resources Investigations Report 77-137
Lake Winnisquam has received treated domestic sewage for approximately 50 years and since June 1961 has been treated with copper sulfate to control the growth of nuisance algae. The Laconia City secondary sewage-treatment plant was upgraded in 1975 to include phosphorus removal. Phosphorus was not removed effectively until early 1976,...
The Triassic Chitistone Limestone, Wrangell Mountains, Alaska: stressing detailed descriptions of sabkha facies and other rocks in lower parts of the Chitistone and their relations to Kennecott-type copper deposits
Augustus K. Armstrong, E. M. MacKevett
1977, Open-File Report 77-217
Recent investigations show that sabkha deposits were important in the genesis of Kennecott-type copper ore. Massive chalcocite-rich lodes at Kennecott and nearby deposits formed in the lower 110 meters of the Upper Triassic Chitistone Limestone. The Chitistone and superimposed Upper Triassic and Jurassic sedimentary rocks formed in a marine basin...
Magmatic behavior of Cu, S, Cl, F, and H2O in igneous rocks associated with the Ray porphyry copper deposit, Arizona
Norman G. Banks
1977, Open-File Report 77-500
Heavy metal discharges into Shasta Lake and Keswick reservoirs on the upper Sacramento River, California; a reconnaissance during low flow
D. Kirk Nordstrom, Everett A. Jenne, Robert C. Averett
1977, Water-Resources Investigations Report 76-49
Four out of seventeen streams entering the Shasta-Keswick Reservoir system in California contribute up to 94 percent of the heavy metal load into the upper Sacramento River under the low flow conditions which existed in the fall of 1974. Of these four streams, three contain acid mine drainage, with Spring...
Map showing distribution pattern of copper from samples of -80 mesh stream sediment, northern Sonora, Mexico
James G. Frisken, R. L. Turner, T. M. Billings, Guillermo Monroy, Benjamin Ponce
1977, Open-File Report 77-338
The Jabal Murryyi copper prospect, Al'Aqiq quadrangle, sheet 20/41D, Kingdom of Saudi Arabia
Ronald G. Worl, Vincent J. Flanigan
1977, Open-File Report 78-522
No abstract available. ...
Quantity and quality of drainage from the Argo Tunnel and other sources related to metal mining in Gilpin, Clear Creek and Park Counties, Colorado
Dennis A. Wentz
1977, Open-File Report 77-734
Eighteen metal-mine drainage sources have been located in that part of Gilpin, Clear Creek, and Park Counties, Colo., lying within the Missouri River basin. At least 13 of these sources are known to contain high acidity and (or) trace-element concentrations or to contribute water to adversely affected streams. From January...
Geology of an Upper Cretaceous copper deposit in the Andean Province, Lassiter Coast, Antarctic Peninsula
Peter D. Rowley, Dwight Lyman Schmidt, Paul L. Williams
1977, Professional Paper 984
Summary of results of frictional sliding studies, at confining pressures up to 6.98 kb, in selected rock materials
R. Summers, J. Byerlee
1977, Open-File Report 77-142
This report is a collection of stress-strain charts which were produced by deforming selected simuiated fault gouge materials. Several sets of samples consisted of intact cylinders, 1.000 inch in diameter and 2.500 inches long. The majority of the samples consisted of thin layers of the selected sample material, inserted within...
Geology and ore deposits of the Kutam Mine, Kingdom of Saudi Arabia
Charles W. Smith, R. Ernest Anderson, M.R. Dehlavi
1977, Open-File Report 78-519
The ancient Kutam mine in southwestern Saudi Arabia was discovered during the course of regional geologic mapping. Malachite coatings along fractures in the ancient workings and nearby large piles of slag indicate the mine was worked for copper. Quartz porphyry of Precambrian age is the principal host rock of the deposit....
