Expedition to Nunivak Island

Science ◽  
1927 ◽  
Vol 66 (1711) ◽  
Keyword(s):  
Nunivak Island

An Example of Consequent Mantle Metasomatism in Peridotite Inclusions from Nunivak Island, Alaska

1984 ◽  
Vol 25 (2) ◽  
pp. 546-577 ◽  
Author(s):  
M. F. RODEN ◽  
F. A. FREY ◽  
D. M. FRANCIS
Keyword(s):  
Mantle Metasomatism ◽  
Nunivak Island

Geology, Paleomagnetism, and Potassium-Argon Ages of Basalts from Nunivak Island, Alaska

1968 ◽  
pp. 377-414 ◽  
Author(s):  
Joseph M. Hoare ◽  
William H. Condon ◽  
Allan Cox ◽  
G. Brent Dalrymple
Keyword(s):  
Nunivak Island

Compositional and thermal state of the upper mantle beneath the Bering Sea basalt province: evidence from the Chukchi Peninsula of Russia

1997 ◽  
Vol 34 (6) ◽  
pp. 789-800 ◽  
Author(s):  
Vyacheslav V. Akinin ◽  
Julia Apt ◽  
Michael F. Roden ◽  
Don Francis ◽  
Elizabeth Moll-Stalcup
Keyword(s):  
Rare Earth ◽  
Rare Earth Element ◽  
Bering Sea ◽  
Upper Mantle ◽  
Earth Element ◽  
Chukchi Peninsula ◽  
Mantle Lithosphere ◽  
Nunivak Island ◽  
Seward Peninsula ◽  
The Bering Sea

Nephelinites and basanites of the Enmelen volcanic field, Chukchi Peninsula, Russia, contain upper mantle xenoliths of relatively calcium- and magnesium-rich spinel lherzolites, pyroxenites, and megacrysts. The phase assemblages of the lherzolites require equilibration near 1.5 GPa, and calculated equilibration temperatures for most inclusions are in the range 850–1030 °C. These temperatures are similar to those calculated for lherzolite inclusions from other Bering Sea localities (Nunivak Island and Seward Peninsula) and are higher than temperatures expected for likely conductive geotherms beneath these volcanic fields. The relatively high temperatures may be the result of magma intrusion into the mantle lithosphere and consequent perturbation of the geotherm shortly before entrainment of the xenoliths in basalt. Two Enmelen lherzolites equilibrated at higher temperatures (1230–1240 °C) and provide further evidence for heating due to intrusive magmas. Some spinel lherzolite inclusions have flat rare earth element patterns and major and trace element abundances close to that of the bulk silicate earth. Based on the occurrence of similar fertile peridotites at Nunivak Island and Seward Peninsula, near-primitive mantle compositions appear to be common in the upper mantle beneath the Bering Sea. These peridotites may represent recent additions to the mantle lithosphere from mantle plumes related to the volcanism. Other Enmelen inclusions are relatively light rare earth element-enriched group I lherzolites metasomatized by a silicate melt, group II pyroxenites precipitated from a variety of melts, and augite megacrysts with convex-upward rare earth element patterns consistent with precipitation from the host basalts at high pressures.

scholarly journals Relationships between carcass characteristics, meat quality, age and sex of free-ranging Alaskan reindeer: a pilot study

Rangifer ◽  
2005 ◽  
Vol 25 (2) ◽  
pp. 107-121 ◽  
Author(s):  
Teresa A. Renecker ◽  
Lyle A. Renecker ◽  
Frank F. Mallory
Keyword(s):  
Bering Sea ◽  
Rangifer Tarandus ◽  
Economic Value ◽  
Meat Production ◽  
Panel Analysis ◽  
Sensory Panel ◽  
Lean Tissue ◽  
Ph Values ◽  
Nunivak Island ◽  
Free Ranging

Twenty-four reindeer (Rangifer tarandus) carcasses from male and female animals that ranged in age from calves to adults were purchased from Bering Sea Reindeer Products (BSRP), Nunivak Island, Alaska, USA. Preslaughter and abattoir procedures were observed and evaluated. Carcasses were split in half, weighed, and broke into wholesale primal cuts of chuck, rib, loin, and hindquarter. Each primal cut was weighed, boxed, and frozen. Each half carcass of primal cuts was later dissected into lean tissue, bone, and the three compartments of fat: subcutaneous, intermuscular, and peritoneal. A portion of the loin was collected from each animal in order to obtain data on pH and shear force. Sensory panel analysis was performed on loin steaks. Due to management and environmental effects, pH values were high and the meat was dark in colour. Carcasses from adult male reindeer contained significantly lower levels of fat than carcasses of adult females. Data indicated that yearling reindeer are of greatest economic value for meat production.

scholarly journals Nursery areas of juvenile northern rock sole (Lepidopsetta polyxystra) in the eastern Bering Sea in relation to hydrography and thermal regimes

2014 ◽  
Vol 71 (7) ◽  
pp. 1683-1695 ◽  
Author(s):  
Daniel W. Cooper ◽  
Janet T. Duffy-Anderson ◽  
Brenda L. Norcross ◽  
Brenda A. Holladay ◽  
Phyllis J. Stabeno
Keyword(s):  
Bering Sea ◽  
Resource Selection ◽  
Large Scale ◽  
Gulf Of Alaska ◽  
Nursery Area ◽  
Eastern Bering Sea ◽  
Middle Domain ◽  
Nunivak Island ◽  
Near Shore ◽  
Unimak Island

Abstract Age-0 and age-1 northern rock sole were collected over large-scale areas of the eastern Bering Sea in the summers of 2003, 2008 and 2010. Age-0 presence was poorly predicted by a published resource selection model developed for the Gulf of Alaska, and the failure of that model may have been caused by oceanographic features in the eastern Bering Sea. Where a front (inner front) separated the well-mixed coastal domain from the stratified middle domain, age-0 fish were less abundant and occurred at fewer stations in the nearshore, thermally mixed coastal domain than expected by the Gulf of Alaska model. In contrast, where the inner front was not established, age-0 fish were present in the highest densities in nearshore and thermally mixed waters. North of Unimak Island, the same hydrographic pattern that inhibits the formation of the inner front also likely transports larvae near shore. Age-1 densities were highest in the coastal domain, and age-0 length decreased with distance from shore, suggesting northern rock sole move shoreward after settlement. Juvenile northern rock sole were abundant in a nursery area between Nunivak Island and Cape Newenham in a warm period (2003), but were almost completely absent in cold periods (2008 and 2010), leading to the hypothesis that climate variability limits the utility of this nursery area during cold periods.

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