Crustal structure of the Chugach Mountains, southern Alaska: A study of peg‐leg multiples from a low‐velocity zone
Ernst Flueh, Walter D. Mooney, Gary S. Fuis, Elizabeth L. Ambos
1989, Journal of Geophysical Research B: Solid Earth (94) 16023-16035
A seismic refraction profile recorded along the geologic strike of the Chugach Mountains in southern Alaska shows three upper crustal high‐velocity layers (6.9, 7.2, and 7.6 km/s) and a unique pattern of strongly focussed echelon arrivals to a distance of 225 km. The group velocity of the...
The crustal structure of the Wrangellia Terrane along the East Glenn Highway, eastern‐southern Alaska
E.B. Goodwin, Gary S. Fuis, Warren J. Nokleberg, E. L. Ambos
1989, Journal of Geophysical Research B: Solid Earth (94) 16037-16057
Recently acquired seismic refraction data from eastern‐southern Alaska provide new information on the structure and composition of the Wrangellia and adjacent terranes. The data comprise a 160‐km‐long refraction profile along the East Glenn (Tok‐Cutoff) Highway that was collected as part of the U.S. Geological Survey's multidisciplinary Trans‐Alaska Crustal Transect program....
Evolution of the western part of the Coast plutonic–metamorphic complex, South-Eastern Alaska, USA: A summary
David A. Brew, A. B. Ford, G. R. Himmelberg
1989, Geological Society Special Publication (43) 447-452
The western Cordillera of North America extends for over 6000 km from the tip of Baja California to the Alaska Range. It includes a wide variety of metamorphic and plutonic terrains, but none is more spectacular scenically or geologically than the Coast plutonic-metamorphic complex (Brew & Ford 1984) of...
Changes in redox conditions in deep‐sea sediments of the subarctic North Pacific Ocean: Possible evidence for the presence of North Pacific Deep Water
Walter E. Dean, J. V. Gardner, Eileen Hemphill-Haley
1989, Paleoceanography (4) 639-653
Cores of upper Quaternary and Holocene sediment from the subarctic North Pacific north of about 48°N contain one or more layers of oxidized brown sediment interbedded within predominantly reduced green sediment. The brown layers are enriched in several trace elements, especially Mn, Mo, Ni, and Co, relative to the green...
Continued studies on opiods and hibernation: Does the polar bear (Ursus maritimus) hibernate?
David S. Bruce, Nancy K. Darling, Katheleen J. Seeland, Peter R. Oeltgen, Sita P. Nilekani, Steven C. Amstrup
Andre Malan, Bernard Canguilhem, editor(s)
1989, Conference Paper, Proceedings of the second international symposium on living in the cold (Colloque Inserm volume 193)
No abstract available....
ODP investigates Indian Ocean origins
F.M. Gradstein, J. Ludden, Leg 123 Shipboard Scientific Party
1989, Geotimes (34) 16-19
No abstract available....
Populations, productivity, and feeding habits of seabirds at Cape Thompson, Alaska: Final report
Brian S. Fadely, John F. Piatt, Scott A. Hatch, David G. Roseneau
1989, Report
Investigations of seabird population sizes and breeding biology were conducted at Cape Thompson from 1959 to 1961 during pre-development studies associated with the Atomic through 1982, the Alaskan Program (OCSEAP) supported determine whether changes Energy Commission’s “Project Chariot.” From 1976 Outer Continental Shelf Environmental Assessment efforts to recensus seabirds at...
Back-arc with frontal-arc component origin of Triassic Karmutsen basalt, British Columbia, Canada
F. Barker, Brown A. Sutherland, J. R. Budahn, George Plafker
1989, Chemical Geology (75) 81-102
The largely basaltic, ???4.5-6.2-km-thick, Middle to Upper Triassic Karmutsen Formation is a prominent part of the Wrangellian sequence. Twelve analyses of major and minor elements of representative samples of pillowed and massive basalt flows and sills from Queen Charlotte and Vancouver Islands are ferrotholeiites that show a range of 10.2-3.8%...
Performance and utility of satellite telemetry during field studies of free-ranging polar bears in Alaska
Gerald W. Garner, Steven C. Amstrup, David C. Douglas, Craig L. Gardner
Charles J. Amlaner Jr., editor(s)
1989, Conference Paper, Biotelemetry X: Proceedings of the 10th international symposium on biotelemetry
Satellite telemetry technology has been used during field studies of polar bears in Alaska since 1985. A total of 109 Platform Transmitter Terminals (PTT) have been deployed on free-ranging female polar bears that seasonally inhabit waters adjacent to the Alaskan coast. The PTTs transmitted locational and sensor data to TIROS-N...
The nature of the crust in the Yukon-Koyukuk province as inferred from the chemical and isotopic composition of five Late Cretaceous to Early Tertiary volcanic fields in western Alaska
E. Moll-Stalcup, Joseph G. Arth
1989, Journal of Geophysical Research Solid Earth (94) 15989-16020
Late Cretaceous and early Tertiary volcanic and plutonic rocks in western Alaska comprise a vast magmatic province extending from the Alaska Range north to the Arctic Circle, south to Bristol Bay, and west to the Bering Sea Shelf. The chemical and isotopic composition of five of these Late Cretaceous to...
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...
Twenty-four hour behavior patterns and budgets of free-ranging reindeer in winter
W. B. Collins, T. S. Smith
1989, Rangifer (9) 2-8
To obtain movement data on wild fulvous tree ducks (Dendrocygna bicolor) 165 immature pen-reared fulvous tree ducks were color-marked and released in three southeast Texas counties in July October 1969/70. Nine (5 percent) of the marked birds were recovered from 3 days to 9 months after release, and an...
A satellite-based digital data system for low-frequency geophysical data
S. Silverman, C. Mortensen, M. Johnston
1989, Bulletin of the Seismological Society of America (79) 189-198
A reliable method for collection, display, and analysis of low-frequency geophysical data from isolated sites, which can be throughout North and South America and the Pacific Rim, has been developed for use with the Geostationary Operational Environmental Satellite (GOES) system. Geophysical data primarily intended for earthquake hazard and crustal deformation...
Changes in floral diversities, floral turnover rates, and climates in Campanian and Maastrichtian time, North Slope of Alaska
N. O. Frederiksen
1989, Cretaceous Research (10) 249-266
One-hundred-and-ten angiosperm pollen taxa have been found in upper Campanian to Masstrichtian rocks of the Colville River region, North Slope of Alaska. These are the highest paleolatitude Campanian and Maastrichtian floras known from North America. Total angiosperm pollen diversity rose during the Campanian and declined toward the end of the...
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...
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...
Reinterpretation of lower Mesozoic rocks on the Chilkat Peninsula, Alaska, as a displaced fragment of Wrangellia
George Plafker, C.D. Blome, Norman J. Silberling
1989, Geology (17) 3-6
The southern Chilkat Peninsula is underlain by low-grade metamorphic rocks consisting of a thick unit of greenstone, in part of Carnian age, that is locally overlain by an attenuated section of calcareous sedimentary rocks and chart of latest Carnian to late Norian age...
A high-resolution seismic reflection/refraction study of the Chugach-Peninsular terrane boundary, southern Alaska
T.M. Brocher, M. A. Fisher, E.L. Geist, N.I. Christensen
1989, Journal of Geophysical Research Solid Earth (94) 4441-4455
We present results from a high-resolution seismic refraction analysis of the shallow (approximately 2 km) crustal structure along the 107-km-long Trans-Alaska Crustal Transect Chugach reflection line in southern Alaska and a comparison with laboratory measurements of field samples. The refraction analysis includes the two-dimensional interpretation of several thousand first- and...
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...
Techniques for shipboard surveys of marine birds
Patrick J. Gould, Douglas J. Forsell
1989, Fish and Wildlife Technical Report 25
We describe shipboard and small boat techniques used by the US Fish and Wildlife Service in Alaska to survey marine birds at sea. The basis is a 10-min, 300-m-wide, strip transect taken from a platform moving at a constant speed in a constant direction. Special routines, such as instantaneous counts...
Acute gastric dilatation and volvulus in a free-living polar bear
Steven C. Amstrup, Carol A. Nielsen
1989, Journal of Wildlife Diseases (25) 601-604
A large, adult male polar bear (Ursus maritimus) was found dead on a barrier island north of Prudhoe Bay, Alaska (USA), in June 1987. There were no external signs of trauma. A twisted distended stomach, distinctive parenchymal and fascial congestion, and significant difficulty in repositioning the...
Reproductive performance of Rio Grande wild turkeys
Joel A. Schmutz, Clait E. Braun
1989, The Condor (91) 675-680
Frequency, magnitude, and timing of reproduction in Rio Grande Wild Turkey (Meleagris gallopavo intermedia) hens were studied in northeastern Colorado in 1986 and 1987. All adults (n = 12) and 95% (n = 20) of yearlings were known to attempt nesting. Adults initiated first nest attempts earlier than yearlings in...
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...
Ethylene glycol (antifreeze) poisoning in a free-ranging polar bear
Steven C. Amstrup, Craig L. Gardner, Kevin C. Myers, Frederick W. Oehme
1989, Veterinary and Human Toxicology (31) 317-319
The bright, fluorescent pink-colored remains of a polar bear were found on an Alaskan island with the gravel and snow adjacent to the bear colored bright purple. Traces of fox urine and feces found nearby were also pink. The punk and purple colors were due to rhodamine B, and ethylene...
Autumn use of Izembek Lagoon, Alaska, by brant from different breeding areas
Austin Reed, Robert A. Stehn, David H. Ward
1989, Journal of Wildlife Management (53) 720-725
Thirty-three adult brant (Branta bernicla) were radiomarked at 4 widely separated areas of the western Canadian arctic and 1 area in western Alaska during June-August 1987. Their use of the Izembek Lagoon on the Alaska Peninsula was monitored through the 1987 fall staging period (Sep-Dec). Eighty percent of the brant...
