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Unnamed Occurrence (ARDF - NL010; headwaters of theYuki River), Kaiyuh Mining District, Yukon-Koyukuk Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Unnamed Occurrence (ARDF - NL010; headwaters of theYuki River) | - not defined - |
| Kaiyuh Mining District | Mining District |
| Yukon-Koyukuk Census Area | Census Area |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
64° 13' 11'' North , 157° 22' 12'' West
Latitude & Longitude (decimal):
Köppen climate type:
Location: This occurrence, locally called the Yuki River gossan, is near the headwaters of the Yuki River, in the southern Kaiyuh Mountains. For this record, the site is plotted at an elevation of about 800 feet, in the NW1/4 sec. 6, T. 15 S. R. 8 E., Kateel River Meridian. river. The location is accurate within 2 miles.
Geology: This occurrence is a conspicuous ferricrete deposit 700 meters long and 2 to 5 meters thick along the Yuki River (Flanigan, 1998). The gossan is composed of rounded cobbles and pebbles of quartz-graphite schist, chlorite schist, quartzite, and greenstone in a limonite and manganese oxide matrix. The ferricrete rests unconformably on moderately to steeply dipping muscovite-quartz schist. Twenty-five rock samples contain values up to 180 ppm copper, 208 ppm zinc, 0.9 ppm silver, and 20 ppm molybdenum (Flanigan, 1998). See also NL002, 008, 009, and 011.
Workings: This occurrence was discovered by Anaconda Minerals Company in 1980 (Flanigan, 1998).
Age: Flanigan (1998) suggests that the molybdenum content of this occurrence may link it to the Round Top quartz monzonite intrusive complex (NL011), which has been dated at about 75 Ma.
Alteration: Conspicuous iron-oxide alteration.
Commodities (Major) - Cu, Zn; (Minor) - Ag, Mo
Development Status: None
Deposit Model: Plutonic-related Cu-Zn
Commodity List
This is a list of exploitable or exploited mineral commodities recorded at this locality.List of minerals for each chemical element
Other Databases
| Link to USGS - Alaska: | NL010 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Ruby DomainDomain
- Ruby TerraneAccretionary Complex
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