Quadrangle map, 1:250,000-scale | LC |
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Quadrangle map, 1:63,360-scale | C-3 |
Latitude | 60.52 |
Longitude | -154 |
Nearby scientific data | Find additional scientific data near this location |
Location and accuracy | 6.4 km W-NW of Portage Lake, in Sec. 15, T. 5 N., R. 27 W., of the Seward Meridian. Accurate within 500 meters. |
Geologic descriptionThe only information is that the U.S. Bureau of Mines (1995) reported as a lode gold and silver deposit. The bedrock in the vicinity of the occurrence is Tertiary volcanic rocks. The rocks of this unit include: rhyolitic breccia, ash-flow tuff, flows, and intrusive rocks and subordinate mafic to intermediate flows (Nelson and others, 1983, unit Tv). Potassium-argon ages for this unit (Tv) range from 56.2 to 62.7 m.y. indicating a Tertiary age for these rocks (Eakins and others, 1978). | |
Geologic map unit | (-154.002240421484, 60.5193364488939) |
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Mineral deposit model | Unknown |
Age of mineralization | Potassium-argon ages for unit Tv range from 56.2 to 62.7 m.y. (Eakins and others, 1978) indicating a Tertiary age for the host rocks to the mineralization. |
Alteration of deposit | Unknown |
Workings or exploration | Unknown |
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Indication of production | None |
Reserve estimates | No reserves |
Production notes | No production |
Additional commentsMAS/MILS sequence number 0020930009 (Bureau of Mines, 1995). Site is in Lake Clark National Park and Preserve. |
MRDS Number | A106354 |
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ReferencesU.S. Bureau of Mines, 1995, Spatial data extracted from the Minerals Availability System/Minerals Industry Location System (MAS/MILS): U.S. Bureau of Mines Special Publication 12-95, CD-ROM.
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Reporters | D.P. Bickerstaff (USGS) |
Last report date | 6/15/1998 |