T.B. Coplen, N.N. Greenwood, H.S. Peiser
1994, Inorganica Chimica Acta (217) 217-218
[No abstract available]...
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Publication Extents
Not all publications have extents, not all extents are completely accurateT. W. Sisson
1994, Chemical Geology (117) 331-344
Trace-element abundances were measured in situ by ion microprobe in five samples of hornblende and melt ranging from basaltic andesite to high-silica rhyolite. Except for one sample, for which quench overgrowth or disequilibrium is suspected, the abundance ratios show systematic inter-element and inter-sample variations, and probably approach true partition coefficients....
R. C. Cipriano, J.D. Teska
1994, Biomedical Letters (49) 7-12
No abstract available....
M.E. Reid
1994, Journal of Geology (102) 709-717
Many types of landslide movement are induced by large rainstorms, and empirical rainfall intensity/duration thresholds for initiating movement have been determined for various parts of the world. In this paper, I present a simple pressure diffusion model that provides a physically based...
R.S. Oremland, L.G. Miller, F.E. Strohmaler
1994, Environmental Science & Technology (28) 514-520
No abstract available....
Carl W. Stover, Lindie R. Brewer
1994, Bulletin 2089
R.J. Walker, J. W. Morgan, M.F. Horan, G.K. Czamanske, E.J. Krogstad, V.A. Fedorenko, V.E. Kunilov
1994, Geochimica et Cosmochimica Acta (58) 4179-4197
Magmatic Cu-Ni sulfide ores and spatially associated ultramafic and mafic rocks from the Noril'sk I, Talnakh, and Kharaelakh intrusions are examined for Re-Os isotopic systematics. Neodymium and lead isotopic data also are reported for the ultramafic and mafic rocks. The Re-Os data for most samples indicate closed-system behavior since the...
Art McGarr
1994, Pure and Applied Geophysics PAGEOPH (142) 467-489
Although laboratory stick-slip friction experiments have long been regarded as analogs to natural crustal earthquakes, the potential use of laboratory results for understanding the earthquake source mechanism has not been fully exploited because of essential difficulties in relating seismographic data to measurements made in the controlled laboratory environment. Mining-induced earthquakes,...
S. B. Roberts, R.W. Stanton, R. M. Flores
1994, International Journal of Coal Geology (25) 213-241
Coal and clastic facies investigations of a Paleocene coal-bearing succession in the Grass Creek coal mine, southwestern Bighorn Basin, Wyoming, USA, suggest that disruption of peat accumulation in recurrent mires was caused by the repetitive progradation of crevasse splays and, ultimately,...
M.A. Nilles, J.D. Gordon, L.J. Schroder
1994, Atmospheric Environment (28) 1121-1128
A collocated, wet-deposition sampler program has been operated since October 1988 by the U.S. Geological Survey to estimate the overall sampling precision of wet atmospheric deposition data collected at selected sites in the National Atmospheric Deposition Program and National Trends Network (NADP/NTN). A duplicate set of wet-deposition sampling instruments was...
W. Z. Savage
1994, International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts (31) 471-483
An exact solution for gravity-induced stresses in finite elastic slopes is presented. This solution, which is applied for gravity-induced stresses in 15, 30, 45 and 90?? finite slopes, has application in pit-slope design, compares favorably with published finite element results for this problem and satisfies the conditions that shear and...
C.J. Nye, S.E. Swanson, V.F. Avery, T. P. Miller
1994, Journal of Volcanology and Geothermal Research (62) 429-452
The 1989-1990 eruption of Redoubt Volcano produced medium-K calc-alkaline andesite and dacite of limited compositional range (58.2-63.4% SiO2) and entrained quenched andesitic inclusions (55% SiO2) which bear chemical similarities to the rest of the ejecta. The earliest (December 15) magmas are pumiceous, often compositionally banded, and the majority is relatively...
J. H. Johnson, D. S. Dropkin
1994, Journal of the Pennsylvania Academy of Science (68) 34-35
R.H. Meade
1994, Quaternary International (21) 29-39
The Amazon and Orinoco Rivers are massive transcontinental conveyance systems for suspended sediment. They derive about 90% of their sediment from the Andes that support their western headwaters, transport it for thousands of kilometers across the breadth of the continent and deposit it in the coastal zones of the Atlantic....
Jingyuan Wang, M. Tatsumoto, X. Li, W. R. Premo, E. C. T. Chao
1994, Geochimica et Cosmochimica Acta (58) 3155-3169
We have obtained precise Th-Pb internal isochron ages on monazite and bastnaesite for the world's largest known rare earth elements (REE)-Fe-Nb ore deposit, the Bayan Obo of Inner Mongolia, China. The monazite samples, collected from the carbonate-hosted ore zone, contain extremely small amounts of uranium (less than 10 ppm) but...
K. J. Wenrich, R. M. Aumente-Modreski
1994, Applied Geochemistry (9) 431-454
Thousands of solution-collapse breccia pipes crop out in the canyons and on the plateaus of northwestern Arizona; some host high-grade uranium deposits. The mineralized pipes are enriched in Ag, As, Ba, Co, Cu, Mo, Ni, Pb, Sb, Se, V and Zn. These breccia pipes formed as sedimentary strata collapsed into...
J.A. Konnert, H. T. Evans Jr., J. J. McGee, G. E. Ericksen
1994, American Mineralogist (79) 1003-1008
Two new isostructural saline minerals from the nitrate deposits of northern Chile have the composition K6(Na,K)4Na6Mg10(XO4)12(IO3)12.12H2O: fuenzalidaite (X = S) and carlosruizite (X = Se,S,Cr). -from Authors...
C. F. Waythomas, R.D. Jarrett
1994, Geomorphology (11) 15-40
Episodic late Quaternary flooding is recorded by bouldery deposits and slackwater sediments along Arthurs Rock Gulch, an ephemeral stream west of Fort Collins, Colorado. Flood deposits consist of individual granodiorite and pegmatite boulders, boulder bars, and coarse overbank sediment that rest on...
D. L. Naftz, L.E. Spangler
1994, Water Resources Bulletin (30) 1119-1135
Salinity increases in water in some parts of the Navajo aquifer in southeastern Utah have been documented previously. The purpose of this paper is to use bromide, iodide, and chloride concentrations and del oxygen-18 and deuterium values in water from the study area to determine if oil-field brines (OFB) could...
Claude E. Boyd, Barnaby J. Watten, V. Goubier, R. Wu
1994, Aquacultural Engineering (13) 31-39
During the 1988 and 1989 growing seasons, dissolved gas pressures were measured in 0·04 ha to 0·06 ha earthen ponds (n = 17) used to produce channel catfish or bluegill sunfish, both with and without supplemental aeration. Surface waters in early morning hours (0630 to 0830 h) were typically saturated...
C.F. Eble, Robert A. Gastaldo, T.M. Demko, Yajing Liu
1994, International Journal of Coal Geology (26) 43-62
Vertical increment samples of the Mary Lee coal bed, collected along an inferred mire interior to mire margin transect, were studied palynologically, petrographically and geochemically to determine if any vertical or lateral changes in coal composition could be detected. Results show...
M.A. Noble, K.H. Brink, C.C. Eriksen
1994, Deep-Sea Research Part I: Oceanographic Research Papers (41) 643-658
Current measurements at depths of 19, 115, 264 and 464 m above the summit of Fieberling Guyot (32??28???N, 127??47???W) for 13 months in 1989 show that the diurnal tides are strongly amplified. The measured variances for K1, P1 and O1 at the 115 m depth were 810, 140 and 80...
D. J. Bove
1994, Open-File Report 94-224
Gary D. Tasker, Raymond M. Slade
1994, Conference Paper, Proceedings of the 21st Annual Conference on Water Policy and
In Texas, a computer program has been developed which will estimate flood quantiles for an ungaged site based on data from gaging stations with similar watershed characteristics. The user enters site location and watershed characteristics for an ungaged site and the program selects, from a data base of gaging stations,...
Mason Jr., D. Max Sheppard
1994, Conference Paper, Proceedings of the Symposium on Fundamentals and Advancements in Hydraulic Measurements and Experimentation
The Herbert C. Bonner Bridge over Oregon Inlet serves as the only land link between Bodie and Hatteras Islands, part of the Outer Banks of North Carolina. Periodic soundings over the past 30 years have documented channel migration, local scour, and deposition at several pilings that support the bridge. In...