Mineral resource potential of the Baker-Cypress BLM Instant Study Area and Timbered Crater Forest Service Further Planning (RARE II) Areas, Modoc, Shasta, and Siskiyou Counties, California
Jocelyn A. Peterson, L.M. Martin, L. E. Esparza, Gary J. Cwick
1981, Miscellaneous Field Studies Map 1214-B
In accordance with the provisions of the Federal Land Policy and Management Act (Public Law 94-579, October 21, 1976), the Geological Survey and the Bureau of Mines have conducted mineral surveys on certain areas, which formally had been identified as "natural" and "primitive" areas prior to November 1, 1975.The Wilderness...
Hydrology of the coal-resource areas in the upper drainages of Huntington and Cottonwood creeks, central Utah
T. W. Danielson, Michael D. ReMillard, Richard H. Fuller
1981, Open-File Report 81-539
The hydrology of coal-resource areas in the upper drainages of Huntington and Cottonwood Creeks in central Utah was studied in order to better define the hydrologic system, to identify the hydrologic effects of underground coal mining, and to devise methods to detect the effects.Discharge records from gaging stations in this...
Rare-earth element geochemistry of the island-arc volcanic rocks of Rabaul and Talasea, New Britain
Joseph G. Arth
1981, Geological Society of America Bulletin (92) 858-863
The island-arc volcanic rocks of Rabaul and Talasea, New Britain, range in composition from basalt through rhyolite. Rare-earth elements have been determined by mass-spectrometric isotope dilution in 16 samples. Chondrite-normalized rare-earth element patterns are distinct for each volcanic center, but all are relatively flat (Ce/YbE.F. = 1.1 to 3.0). Within...
Origin of organic-carbon-rich mid-Cretaceous limestones, Mid-Pacific Mountains and southern Hess Rise
Walter E. Dean, George E. Claypool, Jorn Thiede
1981, Initial reports of the Deep Sea Drilling Project (62) 877-890
Limestones of mid-Cretaceous age containing as much as 8.6 percent organic carbon were cored at one site (463) in the Mid-Pacific Mountains and at two sites (465, 466) on southern Hess Rise, central North Pacific Ocean, during Leg 62 of the Deep Sea Drilling Project. In the Mid-Pacific Mountains, three...
Petrogenesis of garnet two-mica granites in the Ruby Mountains, Nevada
R. W. Kistler, E. D. Ghent, J. R. O’Neil
1981, Journal of Geophysical Research Solid Earth (86) 10591-10606
Garnet-two-mica granites of Jurassic (160 ± 3 m.y.) and Cretaceous (83 ± 1.3 m.y.) ages intrude amphibolite facies metasedimentary rocks of Precambrian age and lower Paleozoic sedimentary rocks in the northern part of the Ruby Mountains, Nevada. High initial 87Sr/86Sr and high values of δ18O for minerals suggest a dominantly sedimentary...
Minor and trace element geochemistry of volcanic rocks dredged from the Galapagos spreading center: Role of crystal fractionation and mantle heterogeneity
D.A. Clague, F.A. Frey, G. Thompson, S. Rindge
1981, Journal of Geophysical Research Solid Earth (86) 9469-9482
A wide range of rock types (abyssal tholeiite, Fe-Ti-rich basalt, andesite, and rhyodacite) were dredged from near 95°W and 85°W on the Galapagos spreading center. Computer modeling of major element compositions has shown that these rocks could be derived from common parental magmas by successive degrees of fractional crystallization. However,...
Trace elemental analysis of bituminuos coals using the Heidelberg proton microprobe
J.R. Chen, H. Kneis, B. Martin, R. Nobiling, K. Traxel, E. C. T. Chao, J.A. Minkin
1981, Nuclear Instruments and Methods (181) 151-157
Trace elements in coal can occur as components of either the organic constituents (macerals) or the inorganic constituents (minerals). Studies of the concentrations and distribution of the trace elements are vital to understanding the geochemical millieu in which the coal was formed and in evaluating the attempts to recover rare...
Clay mineralogy of weathering profiles from the Carolina Piedmont.
P. J. Loferski
1981, Southeastern Geology (22) 193-202
Saprolite profiles (12) that formed over various crystalline rocks from the Charlotte 1o X 2o quadrangle showed overall similarity in their clay mineralogy to depths of 6 to 45 m indicating control by weathering processes rather than by rock type. Most saprolite contained 10-25% clay, and ranged 3 to 70%....
Jasperoid float and stream cobbles as tools in geochemical exploration for hydrothermal ore deposits
T.G. Lovering
1981, Journal of Geochemical Exploration (14) 69-81
Fragments of silicified rocks that are associated with deposits of base and precious metals may be transported as cobbles and pebbles in alluvium far downstream from the source outcrop. These rocks commonly exhibit certain characteristics which distinguish them from other detrital siliceous material, and may thus serve as a useful...
Sm-Nd systematics of a tonalitic augen gneiss and its constituent minerals from northern Michigan
K. Futa
1981, Geochimica et Cosmochimica Acta (45) 1245-1249
The Sm-Nd isotopic system of a tonalitic augen gneiss and its constituent minerals from northern Michigan was disturbed during metamorphism. Sm-Nd zircon ages are lower than the wholerock Sm-Nd model age. However, closely associated pairs of minerals (for example, sphene and biotite or apatite and plagioclase) retain their apparent metamorphic...
Late Cenzoic rhyolites from the Kern Plateau, southern Sierra Nevada, California.
C. R. Bacon, W. A. Duffield
1981, American Journal of Science (281) 1-34
Four late Cenozoic rhyolite domes lie atop the Kern Plateau, 30 to 40km S-SE of Mount Whitney. K-Ar and 40Ar/39Ar dating shows that Monache, Templeton, and Little Templeton Mountains are all about 2.4Ma old; a small dome nearby is approx 0.2Ma old. The three older rhyolites have SiO2 = 73-74%...
Allelic variability in species and stocks of Lake Superior ciscoes (Coregoninae)
Thomas N. Todd
1981, Canadian Journal of Fisheries and Aquatic Sciences (38) 1808-1813
Starch gel electrophoresis was used as a means of recognizing species and stocks in Lake Superior Coregonus. Allelic variability at isocitrate dehydrogenase and glycerol-3-phosphate dehydrogenase loci was recorded for samples of lake herring (Coregonus artedii), bloater (C. hoyi), kiyi (C. kiyi), and shortjaw cisco (C. zenithicus) from five Lake Superior...
The origin of the Cerro Prieto geothermal brine
A.H. Truesdell, J. M. Thompson, T.B. Coplen, N.L. Nehring, C. J. Janik
1981, Geothermics (10) 225-238
The Cerro Prieto geothermal brine may have originated from mixing of Colorado River water with seawater evaporated to about six times its normal salinity. This mixture circulated deeply and was heated by magmatic processes. During deep circulation, Li, K, Ca, B, SiO2 and rare alkalis were transferred from rock minerals to...
Measurement and computation of bed-material discharge in a shallow sand-bed stream, Muddy Creek, Wyoming
E.D. Andrews
1981, Water Resources Research (17) 131-141
Both the measurement and computation of the bed-material discharge of a stream involve large uncertainties because of the difficulties in determining bedload discharge. Measurements of bedload discharge are rare and frequently of unknown accuracy because no bedload sampler has been extensively tested and calibrated over a wide range of hydraulic...
Observations of wing-feather molt and summer feeding ecology of Steller's Eiders at Nelson Lagoon, Alaska
Margaret R. Petersen
1980, Wildfowl (31) 99-106
The population size, moult chronology, food habits, and feeding behaviour of Steller's Eiders Polysticta stelleri were studied at Nelson Lagoon, Alaska from May to October 1977. Sub-adults were flightless from late July to late August and the adult males were flightless from late August to mid September. Adult females were...
Uranium, rare-earth and thorium mineralization at the Hope Mine, eastern Bristol Mountains, San Bernardino County, California
James K. Otton, Richard K. Glanzman, Elizabeth F. Brenner-Tourtelot
1980, Open-File Report 80-821
Composition and properties of the Pierre Shale and equivalent rocks, northern Great Plains region
Leonard Gene Schultz, H. A. Tourtelot, J. R. Gill, J.G. Boerngen
1980, Professional Paper 1064-B
The Pierre Shale and equivalent rocks of Late Cretaceous age consist in the east-central Dakotas of several hundred feet of offshore-marine shale and minor marl; in west-central Montana near the sediment source the equivalents of the Pierre Shale consist of several thousand feet of volcanic-rich and mostly nonmarine sediments; and...
Gamma-ray spectrometric and semiquantitative spectrographic analytical data of the thorium and rare-earth disseminated deposits in the southern Bear Lodge Mountains, Wyoming
Mortimer Hay Staatz, Nancy M. Conklin, Carl M. Bunker, Charles A. Bush
1980, Open-File Report 80-785
No abstract available....
Reconnaissance geochemical map of the Big Snowies Wilderness and contiguous RARE II study areas, Fergus, Golden Valley, and Wheatland Counties, Montana
David A. Lindsey, D.M. Hopkins, E. L. Mosier, J.C. Antweiler
1980, Miscellaneous Field Studies Map 1243-D
No abstract availabe. ...
Geologic map of the Baker-Cypress BLM Roadless Area and Timbered Crater RARE II Areas, Modoc, Shasta, and Siskiyou counties, California
J.A. Peterson, L.M. Martin
1980, Miscellaneous Field Studies Map 1214-A
Interpretation of an aerial radiometric and magnetic survey of the Salmo-Priest study area (RARE E6-981 A1-981), Pend Oreille County, Washington and Boundary County, Idaho
James A. Pitkin, Joseph S. Duval
1980, Miscellaneous Field Studies Map 1192-B
An aerial radiometric and magnetic survey of the Salmo-Priest study area (RARE E6-981) (index map) was made by the U.S. Geological Survey during October, 1978. Geophysical data from the survey will be used in the assessment of the mineral-resource potential of the study area. The Salmo-Priest area is located in...
Analysis of the heavy-mineral fraction of drainage sediments, Domeland Wilderness and adjacent RARE II study areas, Kern and Tulare counties, California
J. M. Motooka, John B. McHugh, W. R. Miller
1980, Open-File Report 80-918
Mineral resource potential of the Pine Creek (RARE II) area, Oregon
George Walton Walker
1980, Open-File Report 80-989
Geochemical analyses of stream sediments of the Middle Mountain-Tobacco Root further planning area (RARE II), Madison County, Montana
J. Michael O’Neill, David F. Siems, Eric P. Welsch, Wendy S. Speckman
1980, Open-File Report 80-720
No abstract available....
Maps showing geology and geochemical sample localities, Pine Creek (RARE II) area, Harney County, Oregon
G. W. Walker
1980, Miscellaneous Field Studies Map 1237
