Unnamed Occurrence (ARDF - ID047; east of upper Little Yetna River), Iditarod Mining District, Yukon-Koyukuk Census Area, Alaska, USAi
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Latitude & Longitude (WGS84):
62° 31' 27'' North , 158° 37' 55'' West
Latitude & Longitude (decimal):
Köppen climate type:
Mindat Locality ID:
200833
Long-form identifier:
mindat:1:2:200833:5
GUID (UUID V4):
1e349f9f-c120-49e6-9480-25d740eca4cb
Location: This occurrence is on hill 540, about 1 mile east of the head of the Little Yetna River. The occurrence is in the SE1/4 SE1/4, section 12, T. 28 N., R. 51 W., of the Seward Meridian. The location is accurate.
Geology: This occurrence is in a zone of unknown size marked by Silicification of felsic volcanic rocks. The silicification is largely chalcedony. The volcanics are part of the Upper Cretaceous or early Tertiary, Yetna River volcanic field (Miller and Bundtzen, 1994; Miller, Bundtzen, and Gray, 2005). Iron-oxide-rich gossan after sulfides was noted in part of the zone. Two samples contained 100 parts per billion (ppb) gold, and 140 ppb mercury (McGimsey and others, 1988).
Workings: Samples were collected by the U.S. Geological Survey in 1984 and 1985 (McGimsey and others, 1988).
Age: Unknown; the rhyolite is part of the Upper Cretaceous or early Tertiary, Yetna River volcanic field (Miller and Bundtzen, 1994).
Alteration: Chalcedonic silicification; iron oxide alteration.
Commodities (Major) - Au; (Minor) - Ag, Hg
Development Status: None
Deposit Model: Hot springs gold-silver? (Cox and Singer, 1986; deposit model 25a).
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
1 valid mineral.
Detailed Mineral List:
ⓘ 'Limonite' |
ⓘ Quartz Formula: SiO2 |
ⓘ Quartz var. Chalcedony Formula: SiO2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
Group 4 - Oxides and Hydroxides | |||
---|---|---|---|
ⓘ | Quartz var. Chalcedony | 4.DA.05 | SiO2 |
ⓘ | 4.DA.05 | SiO2 | |
Unclassified | |||
ⓘ | 'Limonite' | - |
List of minerals for each chemical element
O | Oxygen | |
---|---|---|
O | ⓘ Quartz var. Chalcedony | SiO2 |
O | ⓘ Quartz | SiO2 |
Si | Silicon | |
Si | ⓘ Quartz var. Chalcedony | SiO2 |
Si | ⓘ Quartz | SiO2 |
Other Databases
Link to USGS - Alaska: | ID047 |
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Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
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