Physical factors that could restrict mineral supply
John H. DeYoung Jr., Donald A. Singer
1981, Economic Geology (75th Anniversary) 939-954
Stages in the metal supply process are affected by each of the following physical (geologic) factors: (1) geographic distribution of concentrations of potential ore minerals, (2) depth of these concentrations, (3) mineralogy, (4) grain size of the minerals, and (5) grade and (6) tonnages of the concentrations. For mineral deposits...
Matrix modification with silver for the electrothermal atomization of arsenic and selenium
R. F. Sanzolone, T. T. Chao
1981, Analytica Chimica Acta (128) 225-227
Silver as a matrix modifier is shown to improve the carbon-rod atomization of both arsenic and selenium for atomic absorption spectrometry. Compared to nickel, the efficiency of silver is greater for arsenic and about the same for selenium. Silver fulfils two functions in its reaction, namely stabilization during the ashing...
Migration through soil of organic solutes in an oil-shale process water
J.A. Leenheer, H. A. Stuber
1981, Environmental Science & Technology (15) 1467-1475
The migration through soil of organic solutes in an oil-shale process water (retort water) was studied by using soil columns and analyzing leachates for various organic constituents. Retort water extracted significant quantities of organic anions leached from ammonium-saturated-soil organic matter, and a distilled-water rinse, which followed retort-water leaching, released additional...
Response of the suspended sediment transport system to continental shelf dynamics
Herman A. Karl, D.E. Drake, D.A. Cacchione
1981, Geo-Marine Letters (1) 243-248
Surface currents influenced by a wind-driven upwelling event in San Pedro Bay moved total suspended matter (TSM) confined to the inner shelf on 19 April 1978 seaward, so that by 27 April surface TSM had increased over the outer shelf. Near-bottom concentrations of TSM also increased across the shelf during...
Geological opportunities and constraints on the use of underground space
M.S. Walton
1981, Underground Space (5) 287-289
[No abstract available]...
The occurrence of chlorine in serpentine minerals
Y. Miura, J. Rucklidge, Gordon L. Nord Jr.
1981, Contributions to Mineralogy and Petrology (76) 17-23
Partially serpentinized dunites containing small amounts of Chlorine (< 0.5%) from Dumont, Quebec, and Horoman, Hokkaido, Japan, and one containing less than 0.05% Chlorine from Higashi-Akaishi-Yama, Ehime, Japan have been examined using the electron probe microanalyzer and scanning transmission electron microscope with X-ray analytical capabilities. Chlorine was found together with...
Upper Oligocene evaporites in basin fill of Sevier Desert region, western Utah
D. A. Lindsey, Richard K. Glanzman, Charles W. Naeser, Douglas J. Nichols
1981, American Association of Petroleum Geologists Bulletin (65) 251-260
The basin fill beneath the Sevier Desert of western Utah contains evaporites that were deposited in a broad closed basin. All of the basin fill penetrated by the Gulf Oil 1 Gronning contains abundant volcanic detritus and its alteration products of Cenozoic age. Fission-track dating of tuffaceous sandstone yields ages...
Origin of chert grains and a halite- silcrete bed in the Cambrian and Ordovician Whitehall Formation of eastern New York State
D. M. Rubin, G.M. Friedman
1981, Journal of Sedimentary Petrology (51) 69-72
A chert bed in the Whitehall Formation (Cambrian and Ordovician) of eastern New York State is strikingly similar in petrography and inferred origin to Australian and South African silcretes. The chert in the Whitehall, like its Australian and South African counterparts, occurs along...
Chrysophyte cysts as potential environmental indicators
D.P. Adam, A.D. Mahood
1981, Geological Society of America Bulletin (92) 839-844
Many Chrysophyte algae produce morphologically distinctive, siliceous, microscopic cysts during a resting stage of their life cycles; these cysts are often preserved in sediments. Scanning electron microscopy and Nomarski optics permit much more detailed observation of these cysts than was heretofore possible. We...
Seismic evidence for an extensive gas-bearing layer at shallow depth, offshore from Prudhoe Bay, Alaska
G. Boucher, E. Reimnitz, E. Kempema
1981, Cold Regions Science and Technology (4) 63-71
High-resolution seismic reflection data, recorded offshore from Prudhoe Bay, Alaska, were processed digitally to determine the reflectivity structure of the uppermost layers of the seafloor. A prominent reflector, found at 27 m below the mud line (water depths 7-9 m), has a negative reflection coefficient greater than 0.5. The large...
Some regional costs of a synthetic fuel industry: The case of illinois
E. D. Attanasi, E.K. Green
1981, The Annals of Regional Science (15) 43-52
The Federal Government's efforts to induce development of a coal-based synthetic fuel industry include direct subsidies, tax concessions, and assurances that it will purchase the industry's output, even if above the market price. In this note it is argued that these subsidies will enable this industry to secure a region's...
13C 12C exchange between calcite and graphite: A possible thermometer in Grenville marbles
J.W. Valley, J. R. O’Neil
1981, Geochimica et Cosmochimica Acta (45) 411-419
The fractionation of 13C between calcite and graphite, Δ(Cc-Gr). is consistently small (2.6–4.8 permil) in 34 assemblages from upper amphibolite- and granulite-facies marbles of the Grenville Province. In 25 samples from the Adirondack Mountains, New York, it decreases regularly with increasing metamorphic temperature. The fractionations are independent of absolute δ13C values...
East Pacific rise at 21°N: the volcanic, tectonic, and hydrothermal processes of the central axis
Richard D. Ballard, Jean Francheteau, Tierre Juteau, Claude Rangan, William Normark
1981, Earth and Planetary Science Letters (55) 1-10
Photographs obtained by the ANGUS survey system at 21°N reveal many similarities to the geological processes delineated at other spreading centers and in particular those observed in the Galapagos Rift at 86°W. The region of recent volcanism is restricted to a narrow zone (Zone 1) approximately 1 km wide. This...
An overview of the National Wildlife Health Laboratory after 6 years
Lynne M. Siegfried, Milton Friend
1981, Conference Paper, Proceedings of the twenty-fourth annual meeting of the American Association of Veterinary Laboratory Diagnosticians
No abstract available....
Munsell color value as related to organic carbon in Devonian shale of Appalachian basin
John W. Hosterman, Sallie I. Whitlow
1981, American Association of Petroleum Geologists Bulletin (65) 333-335
Comparison of Munsell color value with organic carbon content of 880 samples from 50 drill holes in the Appalachian basin shows that a power curve is the best fit for the data. A color value below 3 to 3.5 indicates the presence of organic carbon but is meaningless in determining...
Cretaceous Arctic silicoflagellates
D. Bukry
1981, Geo-Marine Letters (1) 57-63
Cretaceous silicoflagellate assemblages from Arctic Ocean USGS Core 437 show Vallacerta siderea the most abundant species; most species of Lyramula disappear halfway up the core; only L. burchardae, n. sp., persists into the upper sections. These occurrences are untypical of the few documented Cretaceous assemblages from other areas. A Campanian...
Mercury in the muscle tissue of fish from three northern Maine lakes
J.J. Akielaszek, T.A. Haines
1981, Bulletin of Environmental Contamination and Toxicology (27) 201-208
There is evidence that fish in Canadian wilderness areas exhibit elevated mercury levels because of the oligotrophic nature of the lakes they inhabit (BROUZES et al. 1977). D'ITRI et al. (1971) reported higher levels of mercury in trout from oligotrophic waters than in trout from eutrophic waters in unpolluted areas....
The Redskin granite: Evidence for thermogravitational diffusion in a Precambrian granite batholith
S. Ludington
1981, Journal of Geophysical Research Solid Earth (86) 10423-10430
The 1000-Ma-old composite Pikes Peak batholith consists largely of medium- to coarse-grained biotite granite but is intruded by several smaller granite plutons. Two of these, the Tarryall Mountains batholith and the Redskin Granite (Hawley, 1969; Hawley and Wobus, 1977), are here interpreted as cupolas atop the main mass of the...
Identification of kaolins and associated minerals in altered volcanic rocks by infrared spectroscopy
Graham R. Hunt, Robert B. Halley
1981, Clays and Clay Minerals (29) 76-78
Mid-infrared spectroscopy (2.5-50 /µm) has been extensively used to identify and characterize clays and associated minerals in rocks and soils, with particular emphasis on the 3-, 10-, and 20-/µm regions (Farmer and Russell, 1967; Farmer, 1968; White, 1971; Van der Marel and Beutelspacher, 1976). However, application of mid-infrared spectroscopy in...
Enzymes and other biochemical indicators of toxicant effects in fishes
Dora R. May Passino
1981, Conference Paper, Second Interagency Workshop on In-Situ Water-Quality Sensing: Biological Sensors
No abstract available....
Aseismic uplift in California
Robert O. Castle, Michael R. Elliot, Thomas D. Gilmore, Robert K. Mark, Evelyn B. Newman, John C. Tinsley III, D.D. Jackson, W.B. Lee, C.-C. Liu
1981, Science (213) 246-247
We disagree with several of the arguments cited by Jackson et al. in support of their view that "the inference of wide-spread aseismic uplift in southern California is not justified" (1). Specifically, the striking correlation shown in figure 1 of Jackson et al. (1) is an artifact of the construction,...
Regional geochemical studies in the Patagonia Mountains, Santa Cruz County, Arizona
M.A. Chaffee, R. H. Hill, S. J. Sutley, J.R. Watterson
1981, Journal of Geochemical Exploration (14) 135-153
The Patagonia Mountains in southern Arizona contain the deeply buried porphyry copper system at Red Mountain as well as a number of other base- and precious-metal mines and prospects. The range contains complex Basin and Range geology with units ranging in age from Precambrian to Holocene. Rock types present include...
Sr isotopic tracer study of the Samail ophiolite, Oman
M. A. Lanphere, R. G. Coleman, C.A. Hopson
1981, Journal of Geophysical Research Solid Earth (86) 2709-2720
We have measured Rb and Sr concentrations and Sr isotopic compositions in 41 whole-rock samples and 12 mineral separates from units of the Samail ophiolite, including peridotite, gabbro, plagiogranite, diabase dikes, and gabbro and websterite dikes within the metamorphic peridotite. Ten samples of cumulate gabbro from the Wadir Kadir section...
Pleistocene high-silica rhyolites of the Coso volcanic field, Inyo County, California
C. R. Bacon, R. Macdonald, R. L. Smith, P. A. Baedecker
1981, Journal of Geophysical Research (86) 10223-10241
The high-silica rhyolite domes and lava flows of the bimodal Pleistocene part of the Coso volcanic field provide an example of the early stages of evolution of a silicic magmatic system of substantial size and longevity. Major and trace element compositions are consistent with derivation from somewhat less silicic parental...
Classifying and characterizing natural vegetation on a regional basis with Landsat MSS data
Kirk C. McDaniel, Robert H. Haas
1981, Conference Paper, Arid land resource inventories: Developing cost-efficient methods: An international workshop, November 30–December 6, 1980, La Paz, Mexico
No abstract available....
