Oceanic Pb-isotopic sources of Proterozoic and Paleozoic volcanogenic massive sulfide deposits on Prince of Wales Island and vicinity, southeastern Alaska

Ayuso, Robert A.; Karl, Susan M.; Slack, John F.; Haeussler, Peter J.; Bittenbender, Peter E.; Wandless, G. A.; Colvin, A. S.

doi:10.3133/pp1732e

Cited by 2 publications

(2 citation statements)

References 52 publications

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“…1) intrudes Ordovician-Early Silurian metasedimentary and metavolcanic rocks of the informally named Moira Sound unit and Ordovician-Early Silurian granitoid rocks (Gehrels, 1992). The rocks of the Moira Sound unit unconformably overlie the Neoproterozoic to Lower Cambrian Wales Group which is composed of juvenile arc-related volcanic rocks, sedimentary sequences and granitoid intrusions (Ayuso et al, 2007;Samson et al, 1989). Stratigraphic rock units on Prince of Wales Island (PWI) are of Neoproterozoic and Paleozoic age.…”

Section: Geological Settingmentioning

confidence: 99%

The Early Jurassic Bokan Mountain peralkaline granitic complex (southeastern Alaska): Geochemistry, petrogenesis and rare-metal mineralization

Dostál

Kontak

Karl

2014

Lithos

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Section: Geological Settingmentioning

confidence: 99%

The Early Jurassic Bokan Mountain peralkaline granitic complex (southeastern Alaska): Geochemistry, petrogenesis and rare-metal mineralization

Dostál

Kontak

Karl

2014

Lithos

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“…The informally named Bonsai Lake is located at ′′55°16′ 52.44′′ N, 133°38′ 15.21′′ W (107 m a.s.l.) in a granitic glacial valley (Ayuso et al 2005) on Baker Island in southeastern Alaska's Alexander Archipelago (Figure 1). The lake is in a bedrock-dammed catchment with one outlet on the west end ( Figure 2).…”

Section: Study Areamentioning

confidence: 99%

A mild Younger Dryas recorded in southeastern Alaska

Wilcox

Fowell

Baichtal

2020

Arctic, Antarctic, and Alpine Research

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Palynological and sedimentological analyses of lacustrine cores from Baker Island, located in southeastern Alaska's Alexander Archipelago, indicate that the beginning of the Younger Dryas chronozone, between approximately 12,900 cal yr BP and approximately 12,600 cal yr BP, was cooler and drier than modern conditions, based on decreases in the percentages of Pinus (pine) and Tsuga mertensiana (mountain hemlock) pollen accompanied by increases in Alnus (alder) pollen and fern spores. This initial cool period, lasting only 300 years, was relatively mild compared to the North Atlantic region, with an estimated temperature reduction of approximately 2°C from modern. Further, there is no sedimentological evidence of glaciation within the lake basin during this time interval. A subsequent increase in the percentages of Pinus and Picea cf. sitchensis (Sitka spruce) indicates that conditions ameliorated during the latter portion of the YD, between approximately 12,600 cal yr BP and approximately 11,700 cal yr BP.

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Oceanic Pb-isotopic sources of Proterozoic and Paleozoic volcanogenic massive sulfide deposits on Prince of Wales Island and vicinity, southeastern Alaska

Abstract: Volcanogenic massive sulfide (VMS) deposits on Prince

Cited by 2 publications

References 52 publications

The Early Jurassic Bokan Mountain peralkaline granitic complex (southeastern Alaska): Geochemistry, petrogenesis and rare-metal mineralization

The Early Jurassic Bokan Mountain peralkaline granitic complex (southeastern Alaska): Geochemistry, petrogenesis and rare-metal mineralization

A mild Younger Dryas recorded in southeastern Alaska

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