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Page 273, results 6801 - 6825

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Publication Extents

Not all publications have extents, not all extents are completely accurate
Subsurface temperatures and geothermal gradients on the North Slope, Alaska
Timothy S. Collett, Kenneth J. Bird, Leslie B. Magoon
1989, Society of Petroleum Engineers of AIME, (Paper) SPE
Geothermal gradients as interpreted from a series of high-resolution stabilized well-bore-temperature surveys from 46 North Slope, Alaska, wells vary laterally and vertically throughout the near-surface sediment (0-2,000 m). The data from these surveys have been used in conjunction with depths of ice-bearing permafrost, as interpreted from 102 well logs, to...
Igneous history of the Koyukuk terrane, western Alaska: Constraints on the origin, evolution, and ultimate collision of an accreted island arc terrane
S. E. Box, W. W. Patton Jr.
1989, Journal of Geophysical Research Solid Earth (94) 15843-15867
The Koyukuk terrane of western Alaska consists of volcanic, volcaniclastic, and plutonic rocks which range from Late Paleozoic to Early Cretaceous in age. The terrane crops out in a U-shaped belt which is roughly paralleled by outer belts of ultramafic rocks, oceanic plate basalts and cherts, and retrograded blueschist facies...
Geologic implications of topographic, gravity, and aeromagnetic data in the northern Yukon-Koyukuk province and its borderlands, Alaska
J. W. Cady
1989, Journal of Geophysical Research Solid Earth (94) 15821-15841
The northern Yukon-Koyukuk province is characterized by low elevation and high Bouguer gravity and aeromagnetic anomalies in contrast to the adjacent Brooks Range and Ruby geanticline. Using newly compiled digital topographic, gravity, and aeromagnetic maps, I have divided the province into three geophysical domains. The Koyukuk domain, which is nearly...
The Resurrection Peninsula ophiolite
Steven W. Nelson, Marti L. Miller, Julie A. Dumoulin
Steven W. Nelson, Thomas D. Hamilton, editor(s)
1989, Book chapter, Guide to the ceology of the Resurrection Bay - Eastern Kenai Fjords area
The Resurrection Peninsula forms the east side of Resurrection Bay (fig. 3). Relief ranges from 437 m (1,434 ft) at the southern end of the peninsula to more than 1,463 m (4,800 ft) opposite the head of the bay. All rock units composing the informally named Resurrection Peninsula ophiolite of...
Remarkable isotopic and trace element trends in potassic through sodic Cretaceous plutons of the Yukon-Koyukuk Basin, Alaska, and the nature of the lithosphere beneath the Koyukuk terrane
Joseph G. Arth, Robert E. Criss, Clara C. Zmuda, Nora K. Foley, W. W. Patton Jr., T. P. Miller
1989, Journal of Geophysical Research B: Solid Earth (94) 15957-15968
During the period from 110 to 80 m.y. ago, a 450-km-long magmatic belt was active along the northern margin of Yukon-Koyukuk basin and on eastern Seward Peninsula. The plutons intruded Upper Jurassic(?) and Lower Cretaceous volcanic arc rocks and Cretaceous sedimentary rocks in Yukon-Koyukuk basin and Proterozoic and lower Paleozoic...
Extra-pair copulation in the greater white-fronted goose
Craig R. Ely
1989, The Condor (91) 990-991
Controlled experiments and quantitative field studies with both captive and wild waterfowl (Family Anatidae) have demonstrated that extra-pair copulations (EPCs, both forced and unforced) may be a viable alternative reproductive strategy for males (Mineau and Cooke 1979; Burns et al. 1980; Cheng et al. 1982, 1983; Afron 1985; Evarts and...
Iterative techniques for characterizing marine bird habitats with time-series of satellite images
J. Christopher Haney
1989, Colonial Waterbirds (12) 78-89
Demonstrating long-term habitat use of marine habitats by seabirds is often complicated by short-term changes in habitat locations, persistence, and age. This paper describes iterative techniques for characterizing non-static habitats, such as meso-scale (10-100 km) ocean eddies and fronts, using time-series of satellite images that define sea surface conditions. Seabird...
Baleen whales and their prey in a coastal environment
John F. Piatt, David A. Methven, Alan E. Burger, Ruth L. McLagan, Vicki Mercer, Elizabeth Creelman
1989, Canadian Journal of Zoology (67) 1523-30
Patterns of abundance of humpback (Megaptera novaeangliae), fin (Balaenoptera physalus), and minke (Balaenoptera acutorostrata) whales are described in relation to the abundance of their primary prey, capelin (Mallotus villosus), during 1982–1985 at Witless Bay, Newfoundland. The abundance ratio of the three whale species was 10:1:3.5, respectively. Abundance of all whale...
Bedrock geology and tectonic evolution of the Wrangellia, Peninsular, and Chugach terranes along the Trans-Alaska Crustal Transect in the Chugach Mountains and southern Copper River Basin, Alaska
George Plafker, W. J. Nokleberg, J. S. Lull
1989, Journal of Geophysical Research Solid Earth (94) 4255-4295
The Trans-Alaskan Crustal Transect in the southern Copper River Basin and Chugach Mountains traverses the margins of the Peninsular and Wrangellia terranes, and the adjacent accretionary oceanic units of the Chugach terrane to the south. The southern Wrangellia terrane margin consists of a polymetamorphosed magmatic arc complex at least in...
Tectonic setting of the Yukon-Koyukuk basin and its borderlands, western Alaska
W. W. Patton Jr., S. E. Box
1989, Journal of Geophysical Research Solid Earth (94) 15807-15820
The Yukon-Koyukuk basin of western Alaska is composed of an arcuate belt of Jurassic and Early Cretaceous subduction-related volcanic and plutonic rocks (Koyukuk terrane) flanked by deep subbasins filled with mid-Cretaceous terrigenous sedimentary rocks. The basin is bordered on three sides by metamorphosed Proterozoic and Paleozoic continental rocks (Seward, Arctic...
Geochemistry of placer gold, Koyukuk-Chandalar mining district, Alaska
E. L. Mosier, J. B. Cathrall, J.C. Antweiler, R. B. Tripp
1989, Journal of Geochemical Exploration (31) 97-115
The Koyukuk-Chandalar mining district of the Brooks Range mineral belt in north-central Alaska contains numerous placer gold deposits but few known lode gold sources. Gold grains, collected from 46 placer localities and 6 lode gold sites in the district, were analyzed for Ag and 37 trace elements utilizing direct current-arc...
Petrology and age of volcanic-arc rocks from the continental margin of the Bering Sea: Implications for Early Eocene relocation of plate boundaries
A. S. Davis, L.-B.G. Pickthorn, T.L. Vallier, M. S. Marlow
1989, Canadian Journal of Earth Sciences (26) 1474-1490
Eocene volcanic flow and dike rocks from the Beringian margin have arc characteristics, implying a convergent history for this region during the early Tertiary. The extrusive rocks are basalt, basaltic andesite, andesite, and minor dacite and rhyolite. The intrusive sample is from a quartz diorite dike intruding serpentinized peridotite. Major-element...
Remote characterization of marine bird habitats with satellite imagery
J. Christopher Haney
1989, Colonial Waterbirds (12) 67-77
Remote sensing techniques such as radar altimetry, synthetic aperture radar, coastal zone color scanning, and infrared radiometry provide effective, instantaneous, and relatively inexpensive means for characterizing critical habitats of marine birds. In order to make optimal use of satellite-derived data, the rationale for marine habitat classification is presented, and advantages...
The Kanuti ophiolite, Alaska
R. A. Loney, G. R. Himmelberg
1989, Journal of Geophysical Research Solid Earth (94) 15869-15900
The Kanuti ophiolite is a mafic-ultramafic thrust sheet of probable Jurassic age, formerly considered to be the upper part of the Yukon-Koyukuk ophiolite belt (Angayucham terrane). It is here called the Kanuti ophiolite after the Kanuti River region on the southeastern flank of the Yukon-Koyukuk Basin. The thrust sheet crops...
Nesting biology of pacific loons, Gavia pacifica, on the Yukon-Kuskokwim Delta, Alaska
Margaret R. Petersen
1989, Canadian Field-Naturalist (103) 265-269
The nesting biology of Pacific Loons, Gavia pacifica, was studied from 1973 to 1975 on the Yukon-Kuskokwim Delta, Alaska. Loons maintained territories on ponds throughout the pre-nesting period. Both adults incubated eggs and raised the young. Males incubated more than females during early incubation, and females more than males during...
Cytopathology and coagulopathy associated with viral erythrocytic necrosis in chum salmon
John R. MacMillian, D. Mulcahy, M.L. Landolt
1989, Journal of Aquatic Animal Health (1) 255-262
The 8-month cytopathologic progression of viral erythrocytic necrosis (VEN) disease in chum salmon Oncorhynchus keta is described. Single to multiple acidophilic, cytoplasmic viral inclusion bodies developed first in mature erythrocytes and then, within 1–2 months, all morphologically identifiable hemopoietic cell types contained VEN inclusions. Cytologic analysis indicated that multinucleate giant...
Seasonal and annual variation in the diet of Atlantic cod (Gadus morhua) in relation to the abundance of capelin (Mallotus villosus) off eastern Newfoundland, Canada
David A. Methven, John F. Piatt
1989, ICES Journal of Marine Science (45) 223-225
The importance of capelin as prey for cod has long been known (Thompson, 1943; and see Lilly (1987) for a review); however, no studies have been conducted on how the highly dynamic seasonal and yearly variations in capelin abundance affect cod diet. We studied the occurrence of capelin in cod...
Seismic reflection images of the crust of the northern part of the Chugach terrane, Alaska: Results of a survey for the Trans-Alaska Crustal Transect (TACT)
M. A. Fisher, T.M. Brocher, W. J. Nokleberg, George Plafker, G.L. Smith
1989, Journal of Geophysical Research Solid Earth (94) 4424-4440
Deep crustal seismic reflection data show strong reflections from the middle and lower crust of the convergent continental margin near the eastern end of the Aleutian trench. These data were collected across the Border Ranges fault system, a major suture zone that separates the Peninsular and Chugach tectonostratigraphic terranes. The...
A comparison of instrumental dewatering methods for the separation and concentration of suspended sediment for subsequent trace element analysis
A. J. Horowitz, K. A. Elrick, R.C. Hooper
1989, Hydrological Processes (3) 163-184
A comparison involving both field and laboratory trials was performed to evaluate the utility of two continuous-flow centrifuges and a tangential-flow filtration system for dewatering suspended sediments for subsequent trace element analysis. Although recovery efficiencies for the various devices differ, the analytical results from the...
Structural analysis of the southern Peninsular, southern Wrangellia, and northern Chugach terranes along the Trans-Alaska Crustal Transect, northern Chugach Mountains, Alaska
W. J. Nokleberg, George Plafker, J. S. Lull, W. K. Wallace, G. R. Winkler
1989, Journal of Geophysical Research Solid Earth (94) 4297-4320
Structural and tectonic analysis of the southern Peninsular, southern Wrangellia, and northern Chugach terranes, along the Trans-Alaska Crustal Transect in the northern Chugach Mountains documents a long succession of Early Jurassic through Cenozoic deformational events. The deformational events are generally characterized by distinctive structural fabrics and metamorphisms. Most of the...