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southwestern Alaska

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Journal Article
Journal: Geophysics
Published: 31 May 2016
Geophysics (2016) 81 (4): B101–B118.
... To illustrate the various issues related to guided waves in shallow marine data, we use multichannel seismic reflection profile 1242 from offshore southwestern Alaska (Figure  1 ), which was acquired by the R/V Ewing in 1994. This seismic survey was a collaborative effort between the University of Delaware...
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Journal Article
Journal: Geophysics
Published: 21 February 2014
Geophysics (2014) 79 (2): B63–B79.
...Eric D. Anderson; Wei Zhou; Yaoguo Li; Murray W. Hitzman; Thomas Monecke; James R. Lang; Karen D. Kelley ABSTRACT Aeromagnetic data helped us to understand the 3D distribution of plutonic rocks near the Pebble porphyry copper deposit in southwestern Alaska, USA. Magnetic susceptibility measurements...
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Journal Article
Journal: Geophysics
Published: 11 September 2013
Geophysics (2013) 78 (5): B317–B328.
... in southwestern Alaska (Figure  1 ), currently ranks first worldwide among porphyry deposits in contained gold (est. 3400 tons or 107.4 million ounces), third worldwide in contained copper (est. 36.5 Mt or 80.6 billion pounds), and high in contained molybdenum (est. 2.5 Mt or 5.6 billion pounds) ( Kelley et al...
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Journal Article
Journal: Economic Geology
Published: 01 May 2013
Economic Geology (2013) 108 (3): 421–436.
...Eric D. Anderson; Murray W. Hitzman; Thomas Monecke; Paul A. Bedrosian; Anjana K. Shah; Karen D. Kelley Abstract Aeromagnetic data are used to better understand the geology and mineral resources near the Late Cretaceous Pebble porphyry Cu-Au-Mo deposit in southwestern Alaska. The reduced-to-pole...
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Journal Article
Journal: Economic Geology
Published: 01 May 2013
Economic Geology (2013) 108 (3): 543–562.
...–1476 Ma, respectively) and soils (0.703680– 0.704107; 1.5–3.0) overlap those of mineralized rocks (0.703687–0.704707; ∼1.0–4.5; Figs. 7 , 8 ). Table 1 Pb Isotope Data for Sulfide Minerals, Pebble Porphyry Cu-Au-Mo Deposit, Southwestern Alaska Sample no. Rock types 206 Pb/ 204 Pb 207...
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Journal Article
Published: 01 January 2013
Journal of Foraminiferal Research (2013) 43 (1): 88–98.
... earthquakes and tsunamis : Quaternary Science Reviews , v. 28 , p. 7 – 13 . Talbot S. S. Talbot S. L. Thomson J. W. Danie¨ls F. J. A. Schofield B. , 2002 , Lichens from Simeonof wilderness, Shumagin Islands, southwestern Alaska : The Bryologist , v. 105 , p. 111 – 121...
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Series: Special Publications of the Society of Economic Geologists
Published: 01 January 2013
DOI: 10.5382/SP.17.05
EISBN: 9781629491639
... Abstract Cretaceous gold metallogenesis in southwestern Alaska comprises three distinct episodes related to the accretionary evolution of northwestern North America. The oldest mineralizing event is characterized by 112 Ma Cu-Au-Bi-Te porphyry-type(?) veining in the zoned Bonanza and adjacent...
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... New data from an Upper Triassic to Lower Cretaceous deep marine succession—the herein reinstated and restricted Gemuk Group—provide a vital piece of the puzzle for unraveling southwestern Alaska's tectonic history. First defined by Cady et al. in 1955 , the Gemuk Group soon became a regional...
... Cretaceous through Paleogene dominantly calc-alkaline magmatism in the Lake Clark region, southwestern Alaska, can be divided into three main periods of activity based on previous work and new 40 Ar/ 39 Ar and U-Pb geochronology. These episodes follow a protracted history of arc magmatism...
Journal Article
Journal: Economic Geology
Published: 01 June 2004
Economic Geology (2004) 99 (4): 643–671.
...Richard J. Goldfarb; Robert Ayuso; Marti L. Miller; Shane W. Ebert; Erin E. Marsh; Scott A. Petsel; Lance D. Miller; Dwight Bradley; Craig Johnson; William McClelland Abstract The Donlin Creek gold deposit, southwestern Alaska, has an indicated and inferred resource of approximately 25 million...
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Journal Article
Journal: Geology
Published: 01 August 2002
Geology (2002) 30 (8): 679–682.
... Al cosmogenic exposure and radiocarbon dating to obtain a precise chronology for a prominent moraine system deposited by alpine glaciers in the Ahklun Mountains, southwestern Alaska. The 200-km-long and 150-km-wide Ahklun Mountains ( Fig. 1 ) have been a major center for Pleistocene glaciation...
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Journal Article
Published: 01 August 2002
Geochemistry: Exploration, Environment, Analysis (2002) 2 (3): 275–285.
...Elizabeth A. Bailey; John E. Gray; Peter M. Theodorakos Abstract We chemically analysed vegetation (willow and alder) and soil samples collected at three abandoned mercury (Hg) mines and at background sites in southwestern Alaska and compared Hg concentrations, speciation and distribution. Total Hg...
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Journal Article
Published: 01 May 2002
The Journal of Geology (2002) 110 (3): 247–270.
.... These faults are on the upper plate of a subduction zone ∼350–450 km inboard of the paleotrench. In southwestern Alaska, dextral displacement is 134 km on the Denali fault, at least 88–94 km on the Iditarod–Nixon Fork fault, and perhaps tens of kilometers on the Dishna River fault. The strike-slip regime...
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Series: Economic Geology Monograph Series
Publisher: Economic Geology Publishing Company
Published: 01 January 1997
DOI: 10.5382/Mono.09.09
EISBN: 9781629490045
... Abstract Placer gold and precious metal-bearing lode deposits of southwestern Alaska lie within a region 550 by 350 km, herein referred to as the Kuskokwim mineral belt. This mineral belt has yielded 100,240 kg (3.22 Moz) of gold, 12,813 kg (412,000 oz) of silver, 1,377,412 kg (39,960 flasks...
Series: Economic Geology Monograph Series
Publisher: Economic Geology Publishing Company
Published: 01 January 1997
DOI: 10.5382/Mono.09.10
EISBN: 9781629490045
... Abstract Epithermal mineral deposits and occurrences of southwestern Alaska consist of Hg-Sb and gold- and sulfidebearing vein lodes. Numerous Hg-Sb lodes are located throughout a region measuring several tens of thousands of square kilometers in and surrounding the Kuskokwim River basin...
Journal Article
Published: 01 July 1995
Journal of Paleontology (1995) 69 (4): 723–736.
Series: DNAG, Geology of North America
Published: 01 January 1994
DOI: 10.1130/DNAG-GNA-G1.285
EISBN: 9780813754536
... Abstract Southwest Alaska lies between the Yukon-Koyukuk province to the north, and the Alaska Peninsula to the south (Wahrhaftig, this volume). It includes the southwestern Alaska Range, the Kuskokwim Mountains, the Ahklun Mountains, the Bristol Bay Lowland, and the Minchumina and Holitna...
Journal Article
Journal: GSA Bulletin
Published: 01 September 1990
GSA Bulletin (1990) 102 (9): 1230–1245.
...PETER D. LEA Abstract Extensive wave-cut exposures at Ekuk Bluffs in the Nushagak lowland of southwestern Alaska provide a 7-km longitudinal section through deposits related to advance of Pleistocene glaciers from the Ahklun Mountains onto the adjoining piedmont. Facies analysis of the proglacial...
Journal Article
Published: 01 July 1990
Journal of Sedimentary Research (1990) 60 (4): 582–591.
...Peter D. Lea Abstract Pleistocene periglacial eolian sediments are widespread in the Nushagak, Holitna, and Upper Kuskokwim lowlands of southwestern Alaska. These sediments comprise mainly sand-sheet deposits and sand-loess intergrades, with subordinate sand-dune deposits and loess. Sand-sheet...
Journal Article
Journal: GSA Bulletin
Published: 01 November 1989
GSA Bulletin (1989) 101 (11): 1389–1407.
... of southwestern Alaska consists largely of such basinal deposits. Regional and detailed studies in and adjacent to this terrane suggest several new conclusions regarding the origin of the basin and its role in the tectonic evolution of southwestern Alaska. Stratigraphic, sedimentologic, compositional...