Geology of zinc-lead skarn deposits in the Tin Creek area, McGrath B-2 Quadrangle, Alaska

Szumigala, D. J.

doi:10.14509/2428

Cited by 2 publications

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“…Small Zn-and Cu-rich stockwork veinlets in plutons, and disseminated sulfides in plutons and endoskarn occur nearby. Bundtzen and others, 1988;Szumigala, 1987 Significant Lode Deposits of Russian Far East, Alaska, and Canadian Cordillera Deposit has minimum strike length of 640 meters, an average thickness of 20 meters, and estimated down-dip extension of 300 meters. Gagaryah deposits contains slightly elevated levels of silver vanadium, and strontium (as celestite), but no lead or zinc.…”

Section: //Ementioning

confidence: 98%

Significant metalliferous and selected non-metalliferous lode deposits and placer districts for the Russian Far East, Alaska, and the Canadian Cordillera

Nokleberg¹,

Bundtzen²,

Dawson³

et al. 1996

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This report is a written tabular compilation of the significant metalliferous and selected non-metalliferous lode deposits and placer districts of the Russian Far East, Alaska, and the Canadian Cordillera. The report provides detailed summaries of the important features of the significant lode deposits and placer districts along with a summary of mineral deposit models, and a bibliography of cited references. Data are provided for 1,079 significant lode deposits and 158 significant placer districts of the region. This version of the report is issued on standard paper

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Section: //Ementioning

confidence: 98%

Significant metalliferous and selected non-metalliferous lode deposits and placer districts for the Russian Far East, Alaska, and the Canadian Cordillera

Nokleberg¹,

Bundtzen²,

Dawson³

et al. 1996

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“…Base-metal skams at Bowser, Tin, and Sheep Creeks in the Farewell district of the McGrath quadrangle exemplify this type (Nokleberg and others, 1987). In the Tin Creek area, Szumigala (1987) described copper-zinc-lead-silver skam and replacement bodies in Paleozoic carbonate and sedimentary rock overlain and intruded by Tertiary igneous rocks. Mineralizing fluids followed structural conduits, such as dikes or faults, to access and replace limestone located at great distances from known intrusive bodies.…”

Section: Skarn Deposit Modelsmentioning

confidence: 99%

“…Mineralizing fluids followed structural conduits, such as dikes or faults, to access and replace limestone located at great distances from known intrusive bodies. Using production statistics from 47 zinc-lead-silver skarn deposits throughout the world, Szumigala (1987) calculated that the 50th percentile, or average exploited deposit, was 2.1 million tons grading 0.079% copper, 5.8% zinc, 3.6% lead, and about 3 oz/ton silver.…”

Section: Skarn Deposit Modelsmentioning

confidence: 99%

Pre-field study and mineral resource assessment of the Sleetmule quadrangle, southwestern Alaska

Miller¹,

Belkin²,

Blodgett³

et al. 1989

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ill 3 -gold-tungsten-quartz vein, 4 -tin-silver-boron enriched, 5 -Mississippi Valley type lead-zinc, and 6 -zinc-lead-silver, copper, or iron skarn. CHAPTER 1. LOCATION. ACCESS. CLIMATE. AND LAND STATUSThe Sleetmute 1° x 3" quadrangle (scale 1:250,000) is located in southwest Alaska, 210 miles west of Anchorage (fig. 1). The area comprises nearly 18,000 km2 (7000 mi2) of variable terrain encompassing portions of two physiographic provinces: the Kuskokwim Mountains and the Holitna Lowland (Wahrhaftig, 1965). The Kuskokwim Mountains, a succession of rounded ridges and broad lowlands, lie along a northeast-trending axis; the southeastern range boundary diagonally bisects the quadrangle. The average elevation is 370 to 760 m (1,200 to 2,500 ft) but some of the more rugged terrain rises to between 900 and 1,250 m (3,000 and 4,100 ft) and has been glaciated. The intervening well-drained lowlands have an elevation of 90 to 180 m (300 to 600 ft). Timberline occurs at an elevation of about 370 m (1,200 ft). The broad, northwest-sloping plain of the Holitna Lowland lies east of the mountains, is 90 to 240 m (300 to 800 ft) in elevation, and drains part of the west side of the Alaska Range. The Kuskokwim River, the second largest in Alaska, roughly bisects the northern half of the quadrangle and several of its tributaries the Holitna, Stony, and Swift Rivers flow across the Holitna Lowland.Access to the quadrangle is essentially by aircraft since no roads or summer trails exist. Commercial air service from Aniak, 20 miles west of the quadrangle, is available to the villages of Sleetmute, Crooked Creek, Red Devil, and Stony River. Several other native villages along the Kuskokwim River have gravel airstrips suitable for small aircraft. During the summer months, the Kuskokwim River is navigable for small craft and suitable for float plane landings. Petroleum and heavy supplies are brought to the riverside villages by shallow-draft barge from Bethel. Although much of the quadrangle is heavily vegetated, ridgetops above timberline can be traversed on foot.The climate of the region is subarctic, characterized by short, typically wet summers, and by dry, cold, windy winters . Average summer temperatures are approximately 55" F, and the quadrangle has discontinuous permafrost.Land jurisdiction in the quadrangle is divisible into three categories (fig. 2). About 55% of the land is owned by the State of Alaska; 25% is Native land (5% of which is under multiple ownership); and about 20% of the land is Federally owned and administered by the Bureau of Land Management (BLM). The area contains no Federal or State designated park or wilderness lands.

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Geology of zinc-lead skarn deposits in the Tin Creek area, McGrath B-2 Quadrangle, Alaska

Abstract: This report is a preliminary publication of DGGS. The author is aoiely responsible for its content and will appreciate candid comments o n the accuracy of t h e data as well as suggestions to improve the report.

Cited by 2 publications

References 0 publications

Significant metalliferous and selected non-metalliferous lode deposits and placer districts for the Russian Far East, Alaska, and the Canadian Cordillera

Significant metalliferous and selected non-metalliferous lode deposits and placer districts for the Russian Far East, Alaska, and the Canadian Cordillera

Pre-field study and mineral resource assessment of the Sleetmule quadrangle, southwestern Alaska

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