Platinum metals in magmatic sulfide ores
A.J. Naldrett, J.M. Duke
1980, Science (208) 1417-1424
Platinum-group elements (PGE) are mined predominantly from deposits that have formed by the segregation of molten iron-nickel-copper sulfides from silicate magmas. The absolute concentrations of PGE in sulfides from different deposits vary over a range of five orders of magnitude, whereas those of other chalcophile elements vary by factors of...
Aeromagnetic and gravity surveys in the Coso Range, California
Donald Plouff, W.F. Isherwood
1980, Journal of Geophysical Research B: Solid Earth (85) 2491-2501
The effect of an underlying magma reservoir cannot be identified within the complex gravity pattern in the Coso Range, California. Rather, linear gravity contours, which suggest a regional tectonic origin, enclose the location of most of the volcanic activity of the Coso Range. Faults along the edges of northwest trending,...
Pollution ecology of breeding great blue herons in the Columbia Basin, Oregon and Washington
L. J. Blus, Charles J. Henny, T. E. Kaiser
1980, Murrelet (61) 63-71
Approximately 40 pairs of Great Blue Herons (Ardea herodias) formerly nested in trees on or near Blalock Island about 95 km downstream from Richland, Washington, in the Columbia River (Nehls 1972 ). In conjunction with construction of the John Day Lock and Dam and before creating Lake Umatilla in 1968,...
Transfer of crude oil from contaminated water to bird eggs
P.H. Albers
1980, Environmental Research (22) 307-314
Paris of breeding mallard ducks were exposed to oiled water for 2 days during the first week of incubation. Hatching success of ducks exposed to 100 ml of Prudhoe Bay crude oil per square meter of water surface was significantly less than that of controls. Hatching success of ducks exposed...
Comments and replies on ‘Collision-deformed Paleozoic continental margin, western Brooks Range, Alaska’: Reply
Michael Churkin, Warren J. Nokleberg
1980, Geology (8) 356-357
No abstract available....
Main image file tape description
Howard W. Warriner
1980, Report
This Main Image File Tape document defines the data content and file structure of the Main Image File Tape (MIFT) produced by the EROS Data Center (EDC). This document also defines an INQUIRY tape, which is just a subset of the MIFT. The format of the INQUIRY tape is identical...
Late Cenozoic volcanism, geochronology, and structure of the Coso Range, Inyo County, California
Wendell A. Duffield, Charles R. Bacon, G. Brent Dalrymple
1980, Journal of Geophysical Research B: Solid Earth (85) 2381-2404
The Coso Range lies at the west edge of the Great Basin, adjacent to the southern part of the Sierra Nevada. A basement complex of pre‐Cenozoic plutonic and metamorphic rocks is partly buried by ∼35 km3 of late Cenozoic volcanic rocks that were erupted during two periods, as defined by K‐Ar...
Stability of sulfur slopes on Io
Gary D. Clow, M. H. Carr
1980, Icarus (44) 268-279
The mechanical properties of elemental sulfur are such that the upper crust of Io cannot be primarily sulfur. For heat flows in the range 100–1000 ergs cm−2, sec−1, sulfur becomes ductile within several hundred meters of the surface and would prevent the formation of calderas with depths greater than this....
Environmental stratification — A method to improve Landsat digital analysis accuracy and land cover map utility
L. R. Pettinger
1980, Conference Paper, Proceedings of the 14th International Symposium on Remote Sensing of the Environment
No abstract available....
Sediment transport in Norton Sound, Alaska
D.E. Drake, D.A. Cacchione, R.D. Muench, C.H. Nelson
1980, Marine Geology (36) 97-126
The Yukon River, the largest single source of Bering Sea sediment, delivers > 95% of its sediment load at the southwest comer of Norton Sound during the ice-free months of late May through October. During this period, surface winds in the northern Bering Sea area are generally light from the...
Allochthonous Jurassic ophiolite in northwest Washington
John T. Whetten, R. E. Zartman, Richard J. Blakely, David L. Jones
1980, GSA Bulletin (91) 359-368
Fragments of Jurassic ophiolite having U-Pb zircon ages narrowly grouped at 160 to 170 m.y. are widespread over parts of northwest Washington. The Haystack thrust fault is inferred to mark the base of the ophiolite in the San Juan Islands and adjacent Cascade foothills; other bodies of mafic and ultramafic...
Need for new sensors to map lithologic units
Lawrence C. Rowan
Anthony R. Barringer, editor(s)
1980, Sixth Annual Pecora Symposium and Exposition 106-107
One of the most important contributions that remote sensing can make to mineral energy explorations to provide data from satellites to augment regional geological mapping. Geologic maps, which show information on the subsurface, are the main basis for formulating models of resource genesis that guide exploration. However, conventional...
Detection and modeling of subsurface coal oxidation
Leo S. Leonhart, William O. Rasmussen
Anthony R. Barringer, editor(s)
1980, Sixth Annual Pecora Symposium and Exposition 83-83
The oxidation and sustained ignition of coal and coaly wastes within surface coal mine spoils in the southwestern U.S. have hampered the success of reclamation efforts at these locations. To assess better the magnitude, depth, geometry, and dynamics of the oxidation process thermal infrared remote sensing data have been...
Integration of geological, geochemical, and geophysical spatial data of the Cement oil field, Oklahoma, test site
Patricia A. Termain, Terrence J. Donovan, Pat S. Chavez
Anthony R. Barringer, editor(s)
1980, Sixth Annual Pecora Symposium and Exposition 57-57
Measurement pertaining to geology, geochemistry, and geophysics of the Cement oil field, Oklahoma, test site were collected employing both airborne sensors and ground-based data collection. The measurements include: (1) airborne gamma-ray spectrometry (supplying bismuth 214, thalium 208, and potassium 40 gamma-ray intensities); (2) aeromagnetic survey data; (3) multi-frequency airborne resistivity...
Considerations for blending data from various sensors
Brian P. Bauer
Anthony R. Barringer, editor(s)
1980, Sixth Annual Pecora Symposium and Exposition 56-56
A project is being proposed at the EROS Data Center to blend the information from sensors aboard various satellites. The problems of, and considerations for, blending data from several satellite-borne sensors are discussed. System descriptions of the sensors aboard the HCMM, TIROS-N, GOES-D, Landsat 3, Landsat D, Seasat,...
Interpretation of long- and short-wavelength magnetic anomalies
John M. DeNoyer
Anthony R. Barringer, editor(s)
1980, Sixth Annual Pecora Symposium and Exposition 51-51
Magset was launched on October 30, 1979. More than a decade of examining existing data, devising appropriate models of the global magnetic field, and extending methods for interpreting long-wavelength magnetic anomalies preceded this launch Magnetic data collected by satellite can be interrupted by using a method of analysis that quantitively...
Digital mapping of limonitic rocks by using Landsat MSS radio data
Melvin H. Podwysocki, Donald B. Segal, Shirley Simpson
Anthony R. Barringer, editor(s)
1980, Sixth Annual Pecora Symposium and Exposition 49-51
Color-ratio composite images of Landsat MSS (multi-spectral scanner) bands have been used by other workers to map the distribution of limonitic rocks in semi-arid and arid areas as possible indicators of hydrothermal alteration (Rowan et al, 1974). The images are particularly useful for broad overviews, but detailed analysis at...
Airborne Fraunhofer line discriminator (FLD) luminescence imaging systems and its application to exploration problems
Robert D. Watson, Arnold F. Theisen, William R. Hemphill
Anthony R. Barringer, editor(s)
1980, Sixth Annual Pecora Symposium and Exposition 40-42
Experiments with an imaging airborne Fraunhofer line discriminator (FLD) are being conducted to establish the feasibility of delineating the areal extent of luminescent materials on the earth's surface from aircraft and spacecraft. All luminescence measurements are related to a standard set of conditions with rhodamine wt dye used as...
Evaluation of new spectral bands for multi-spectral imaging: SMIRR aircraft test results
Alexander F.H. Goetz, Lawrence C. Rowan
Anthony R. Barringer, editor(s)
1980, Sixth Annual Pecora Symposium and Exposition 38-40
A 10-channel radiometer called the Shuttle Multispectral Infrared Radiometer (SMIRR) is scheduled to take data from orbit on the second shuttle orbital light test. As part of the instrument test sequence, a series of aircraft flights was carried out over 10 test areas in Utah and Nevada. Apart...
Airborne-biogeochemical survey test-case results
William E. Collins, Sheng-Huei Chang, Gary L. Raines, Frank C. Canney, Roger Ashley
Anthony R. Barringer, editor(s)
1980, Sixth Annual Pecora Symposium and Exposition 71-73
Airborne spectroradiometer surveys over several forest-covered sulfide bodies indicate that mineralization has affected the overlying vegetation; anomalous spectral reflectivity properties can be detected in the vegetation using appropriate remote-sensing interments and data-reduction techniques. Mineralization induces subtle changes in the shape of the chlorophyll a and b absorption spectrum between...
Use of solid-state 13C NMR in structural studies of humic acids and humin from Holocene sediments
Patrick G. Hatcher, D.L. VanderHart, W.L. Earl
1980, Organic Geochemistry (2) 87-92
13C NMR spectra of solid humic substances in Holocene sediments have been obtained using cross polarization with magic-angle sample spinning techniques. The results demonstrate that this technique holds great promise for structural characterizations of complex macromolecular substances such as humin and humic acids. Quantifiable distinctions can be made between structural...
The natural food habits of grizzly bears in Yellowstone National Park, 1973-74
Stephen Patrick Mealey
1980, Book chapter, Bears - Their biology and management
The natural food habits of grizzly bears (Ursus arctos horribilis Ord) in Yellowstone National Park were investigated in 1973-74 to identify the grizzly's energy sources and trophic level(s), nutrient use, and distribution. Food consumption was determined by scat analysis and field observations. Food quality and digestibility were estimated by chemical...
High duck nesting success in a predator-reduced environment
Harold F. Duebbert, John T. Lokemoen
1980, Journal of Wildlife Management (44) 428-437
Duck nesting and production were studied during 1969-74 on a 51-ha field of undisturbed grass-legume cover and a surrounding 8.13-km2 area in north-central South Dakota. The principal mammalian predators of ducks were reduced within a 259-km2 zone from May 1969 through August 1971. Dabbling duck nest densities, hatching success, and...
Sedimentology and geochemistry of surface sediments, outer continental shelf, southern Bering Sea
J.V. Gardner, W.E. Dean, T.L. Vallier
1980, Marine Geology (35) 299-329
Present-day sediment dynamics, combined with lowerings of sea level during the Pleistocene, have created a mixture of sediments on the outer continental shelf of the southern Bering Sea that was derived from the Alaskan Mainland, the Aleutian Islands, and the Pribilof ridge. Concentrations of finer-grained, higher-organic sediments in the region...
Effective and bankfull discharges of streams in the Yampa River basin, Colorado and Wyoming
E.D. Andrews
1980, Journal of Hydrology (46) 311-330
The effective discharge is defined as the increment of discharge that transports the largest fraction of the annual sediment load over a period of years. Increments of the average annual total sediment load transported by various discharges were calculated by the flow-duration, sediment-transport-curve method for 15 gaging stations in the...
