Prerelease stratification in tag-recovery models with time dependence
R.M. Dorazio
1993, Canadian Journal of Fisheries and Aquatic Sciences (50) 535-541
A statistical model is developed for estimating time-dependent survival and recovery rates of tagged populations that are stratified into groups at release. For populations of fish, the groups might include different sexes or stocks, or they might be distinguished by the location or method of capture. In the model developed...
Autumn diet of lesser snow geese staging in northeastern Alaska
Alan W. Brackney, Jerry W. Hupp
1993, Journal of Wildlife Management (57) 55-61
The coastal plain of the Arctic National Wildlife Refuge (ANWR) is used by lesser snow geese (Chen caerulescens caerulescens) in autumn for premigratory staging. To better understand the potential impacts of human disturbance on snow geese, we investigated species composition of, and temporal and age-related variation in, their diet during...
Lead isotopic composition of paleozoic and late proterozoic marine carbonate rocks in the vicinity of Yucca Mountain, Nevada
Robert E. Zartman, Loretta M. Kwak
1993, Conference Paper, High Level Radioactive Waste Management
Paleozoic and Late Proterozoic marine carbonate rocks (limestones, dolomites, and their metamorphic equivalents) cropping out in the vicinity of Yucca Mountain contain lead with an isotopic composition strongly suggesting them to be a major source of the lead observed at Trench 14 in the carbonate phase of carbonate-silica veins and...
Imaging volcanoes using teleseismic tomography
H.M. lyerand, P.B. Dawson
1993, Book chapter, Seismic tomography; theory and practice
No abstract available ...
Trace metals (Cd, Cu, Ni, and Zn) and nutrients in coastal waters adjacent to San Francisco Bay, California
A. VanGeen, Samuel N. Luoma
1993, Estuaries (16) 559-566
Samples collected in December 1990 and July 1991 show that dissolved Cd, Cu, Ni, and Zn distributions in the Gulf of the Farallones are dominated by mixing of two end-members: (1) metal-enriched San Francisco Bay water and (2) offshore California Current water. The range of dissolved metal concentrations observed is...
Heat flow from four new research drill holes in the Western Cascades, Oregon, U.S.A.
S. E. Ingebritsen, M. A. Scholl, D. R. Sherrod
1993, Geothermics (22) 151-163
Conceptual models of the thermal structure of the Oregon Cascade Range propose either (1) a narrow zone of magmatic heat sources, flanked by shallow heat-flow anomalies caused by lateral ground-water flow; or (2) a wide zone of magmatic heat sources, with localized, generally negligible ground-water effects. The proposed narrow heat...
Distributional records of amphibians and reptiles from the Exuma Islands, Bahamas, including the first reports of a freshwater turtle and an introduced gecko
R. Franz, C.K. Dodd Jr., D.W. Buden
1993, Caribbean Journal of Science (29) 165-173
Abstract not supplied at this time...
Dissolved sulfides in the oxic water column of San Francisco Bay, California
J.S. Kuwabara, G.W. Luther
1993, Estuaries (16) 567-573
Trace contaminants enter major estuaries such as San Francisco Bay from a variety of point and nonpoint sources and may then be repartitioned between solid and aqueous phases or altered in chemical speciation. Chemical speciation affects the bioavailability of metals as well as organic ligands to planktonic and benthic organisms,...
Composition of steam in the system NaCl-KCl-H2O-quartz at 600°C
Robert O. Fournier, J. Michael Thompson
1993, Geochimica et Cosmochimica Acta (57) 4365-4375
In the system NaCl-KCl-H2O, with and without ??-quartz present, steam was equilibrated in a large-volume reaction vessel with brine and/or precipitated salt at 600??C and pressures ranging from about 100 to 0.4 MPa. Episodically, steam was extracted for chemical analysis, accompanied by a decrease in pressure within the reaction vessel....
Differential equations governing slip-induced pore-pressure fluctuations in a water-saturated granular medium
R.M. Iverson
1993, Mathematical Geology (25) 1027-1048
Macroscopic frictional slip in water-saturated granular media occurs commonly during landsliding, surface faulting, and intense bedload transport. A mathematical model of dynamic pore-pressure fluctuations that accompany and influence such sliding is derived here by both inductive and deductive methods. The inductive derivation shows how the governing differential equations represent the...
Estrus synchronization and successful artificial insemination in gaur (Bos gaurus)
T. S. Gross, D.L. Armstrong, L.G. Simmons, J.R. Schwartz
1993, Journal of Zoo and Wildlife Medicine (17) 193-206
Abstract not supplied at this time...
Bimodal Density Distribution of Cryptodome Dacite from the 1980 Eruption of Mount St. Helens, Washington
R. Hoblitt, R.S. Harmon
1993, Bulletin of Volcanology (55) 421-437
The explosion of a cryptodome at Mount St. Helens in 1980 produced two juvenile rock types that are derived from the same source magma. Their differences-color, texture and density-are due only to vesicularity differences. The vesicular gray dacite comprises bout 72% of the juvenile material; the black dacite comprises the...
Kosnarite, KZr2(PO4)3, a new mineral from Mount Mica and Black Mountain, Oxford County, Maine
Michael E. Brownfield, E.E. Foord, S. J. Sutley, T. Botinelly
1993, American Mineralogist (78) 653-656
Kosnarite, ideally KZr2(PO4)3, has been identified as part of a late-stage, secondary phosphate mineral assemblage from the Mount Mica pegmatite at Paris, and from the Black Mountain pegmatite, Rumford, Oxford County, Maine. Kosnarite from Mount Mica occurs as pseudocubic rhombohedral crystals, as much as 0.9 mm in maximum dimension, that...
Acid processing of pre-Tertiary radiolarian cherts and its impact on faunal content and biozonal correlation
C.D. Blome, K. M. Reed
1993, Geology (21) 177-180
The numbers of radiolarians visible in thin sections of chert-rich rocks are commonly an order of magnitude greater than the numbers observed on the surfaces of fragments etched by hydrofluoric acid (HF) and typically orders of magnitude greater than the numbers of individuals...
Devonian volcanogenic massive sulfide deposits and occurrences, southern Yukon-Tanana Terrace, eastern Alaska Range, Alaska
I. M. Lange, W. J. Nokleberg, S.R. Newkirk, J. N. Aleinikoff, S. E. Church, H.R. Krouse
1993, Economic Geology (88) 344-376
A belt of volcanogenic massive sulfide deposits extends for over 150 km along the southern margin of the Yukon-Tanana terrane of the eastern Alaska Range. Located north of the Denali fault, the Yukon-Tanana terrane forms a major basement unit in east-central Alaska. The volcanogenic massive sulfide deposits are primarily in...
Experimental dynamic metamorphism of mineral single crystals
S. H. Kirby, L.A. Stern
1993, Journal of Structural Geology (15) 1223-1240
This paper is a review of some of the rich and varied interactions between non-hydrostatic stress and phase transformations or mineral reactions, drawn mainly from results of experiments done on mineral single crystals in our laboratory or our co-authors. The state of stress and inelastic deformation can enter explicitly into...
Seismic responses of two adjacent buildings. II. Interaction
Mehmet Çelebi
1993, Journal of Structural Engineering (119) 2477-2492
Presented in this part of the two-part paper is a study of the relations between earthquake motions recorded from two, adjacent, seven-story buildings, from a downhole below the foundation of one of the buildings and from three free-field sites, all within one city block. This unique data set was obtained...
2.8-Ma ash-flow caldera at Chegem River in the northern Caucasus Mountains (Russia), contemporaneous granites, and associated ore deposits
P. W. Lipman, O.A. Bogatikov, A.A. Tsvetkov, C. Gazis, A.G. Gurbanov, K. Hon, N.V. Koronovsky, V.I. Kovalenko, P. Marchev
1993, Journal of Volcanology and Geothermal Research (57) 85-124
Diverse latest Pliocene volcanic and plutonic rocks in the north-central Caucasus Mountains of southern Russia are newly interpreted as components of a large caldera system that erupted a compositionally zoned rhyolite-dacite ash-flow sheet at 2.83 ?? 0.02 Ma (sanidine and biotite 40Ar/39Ar). Despite its location within a cratonic collision zone,...
Geophysical investigations of concealed faults near Yucca Mountain, Southwest Nevada
D. A. Ponce
1993, Conference Paper, High Level Radioactive Waste Management
Detailed gravity and ground magnetic data collected along surveyed traverses across Midway Valley, on the eastern flank of Yucca Mountain, Nevada reveal that these methods can be used to delineate concealed faults. These studies are part of an effort to evaluate faulting in the vicinity of the proposed surface facilities...
Geophysical characteristics of the hydrothermal systems of Kilauea volcano, Hawaii
J. Kauahikaua
1993, Geothermics (22) 271-299
Clues to the overall structure of Kilauea volcano can be obtained from spatial studies of gravity, magnetic, and seismic velocity variations. The rift zones and summit are underlain by dense, magnetic, high P-wave-velocity rocks at depths of about 2 km less. The gravity and seismic velocity studies indicate that the...
Mitochondrial DNA variation in chinook salmon and chum salmon detected by restriction enzyme analysis of polymerase chain reaction products
M. Cronin, R. Spearman, R. Wilmot, J. Patton, J. Bickman
1993, Canadian Journal of Fisheries and Aquatic Sciences (50) 708-715
We analyze intraspecific mitochondrial DNA variation in chinook salmon from drainages in the Yukon River, the Kenai River, and Oregon and California rivers; and chum salmon from the Yukon River and vancouver Island, and Washington rivers. For each species, three different portions of the mtDNA molecule were amplified seperately using...
Sharpness of upper-mantle discontinuities determined from high-frequency reflections
H.M. Benz, J.E. Vidale
1993, Nature (365)
AN understanding of the nature of seismic discontinuities in the Earth's upper mantle is important for understanding mantle processes: in particular, the amplitude and sharpness of these discontinuities are critical for assessing models of upper-mantle phase changes and chemical layering. So far, seismic studies aimed at determining the thickness and...
Sulfur isotope and porewater geochemistry of Florida escarpment seep sediments
J. P. Chanton, C.S. Martens, C. K. Paull, J.A. Coston
1993, Geochimica et Cosmochimica Acta (57) 1253-1266
Distributions of porewater constituents, SO4=, NH4+, Cl−, ∑CO2, and H2S, solid phase iron, and sulfur concentrations, and the sulfur isotopic composition of dissolved and solid phases were investigated in sediments from abyssal seeps at the base of the Florida escarpment. Despite the apparent similarity of seep sediment porewater chemistry to...
Phosphate rock demand into the next century: Impact on wolld food supply
J. R. Herring, R.J. Fantel
1993, Nonrenewable Resources (2) 226-246
A vital and indisputable link exists between phosphate rock and world food supply. Phosphate rock is the source of phosphorus used to make phosphatic fertilizers, essential for growing the food needed by humans in the world today and in the future. We modeled the depletion of the known reserves and...
Evaluation of the anesthetic metomidate for the handling and transport of juvenile American shad
R. M. Ross, T. W. H. Backman, R. M. Bennett
1993, Progressive Fish-Culturist (55) 236-243
Juvenile American shad (Alosa sapidissima) were exposed to three levels of metomidate (0.0 = control, 0.5, and 1.0 mg/L) and three types of sedation or handling (none, sedation only, and handling after sedation) to determine the efficacy and safety of the drug for use in transport and handling of this...
