Unnamed Occurrence (ARDF - ID055; head of Caribou Creek), Iditarod Mining District, Yukon-Koyukuk Census Area, Alaska, USAi
Regional Level Types | |
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Unnamed Occurrence (ARDF - ID055; head of Caribou Creek) | - not defined - |
Iditarod Mining District | Mining District |
Yukon-Koyukuk Census Area | Census Area |
Alaska | State |
USA | Country |
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Latitude & Longitude (WGS84):
62° 31' 42'' North , 157° 51' 39'' West
Latitude & Longitude (decimal):
Köppen climate type:
Mindat Locality ID:
200841
Long-form identifier:
mindat:1:2:200841:0
GUID (UUID V4):
c6ef451f-09b6-43d6-b613-800252859bb6
Location: This occurrence is on a small but prominent knob, hill 877, on an unnamed fork of Caribou Creek. The occurrences is at an elevation of about 700 feet, about 0.5 mile west to west-southwest of the center of section 8, T. 28 N., R. 46 W., of the Seward Meridian. The location is accurate.
Geology: This occurrence consists of altered, iron-oxide-stained hornfels near a biotite-bearing, fine grained intrusion. The intrusion has been radiometrically dated as 70.2 Ma (Miller and Bundtzen, 1994; Miller, Bundtzen, and Gray, 2005). The mineralized body is of uncertain size and orientation. One grab sample of mineralization rock contained 2,000 parts per billion (ppb) silver, 850 parts per million (ppm) arsenic, 200 ppm copper, 52 ppm bismuth, 30 ppm tin, and 50 ppb gold (McGimsey and others, 1988).
Workings: The area was sampled by the Alaska Division of Geological and Geophysical Surveys and U.S. Geological Survey in 1986 (McGimsey and others, 1988).
Age: Undated; the nearby intrusion is 70.2 Ma (Miller and Bundtzen, 1994).
Alteration: Iron oxide staining.
Commodities (Major) - Ag, Bi, Sn; (Minor) - As, Au, Cu
Development Status: None
Deposit Model: Sn-polymetallic deposit or Polymetallic vein (Cox and Singer, 1986; model 20b o
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsCommodity List
This is a list of exploitable or exploited mineral commodities recorded at this locality.Mineral List
Detailed Mineral List:
ⓘ 'Limonite' |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
Unclassified | |||
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ⓘ | 'Limonite' | - |
List of minerals for each chemical element
Other Databases
Link to USGS - Alaska: | ID055 |
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Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Farewell buried DomainDomain
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