Unnamed Occurrence (ARDF - TK040; northwest of upper Watana Creek), Valdez Creek Mining District, Matanuska-Susitna Borough, Alaska, USAi
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Latitude & Longitude (WGS84):
62° 56' 49'' North , 147° 47' 52'' West
Latitude & Longitude (decimal):
Köppen climate type:
Mindat Locality ID:
201781
Long-form identifier:
mindat:1:2:201781:8
GUID (UUID V4):
0b7e841e-17c3-4eb5-a65e-279db6399148
Location: This occurrence is at an elevation of about 3,700 feet on the northwest side of upper Watana Creek. It is approximately 1.5 miles southeast of VABM Watana, in the NE1/4SE1/4 sec. 18, T. 33 N., R. 9 E., Seward Meridian. The location is accurate to within 1/4 mile.
Geology: This occurrence is a small gossan zone at the contact of maroon amygdaloidal basalt and overlying, buff-weathering dolomitic limestone. Upper Triassic fossils occur in the limestone, 1,000 feet north of the gossan (Csejtey and others, 1978; J. Schmidt, written commun., 2001). A U.S. Geological Survey sample contains 3.3 parts per million gold, 1.0 part per million silver, 293 parts per million copper, and 115 parts per million antimony. (The 3.3-ppm gold value is from an ICP analysis by XRAL Laboratories; a fire assay on the sample gives 0.024 ppm gold. The cause of this discrepancy is not known.)
Workings: Only surface sampling by U.S. Geological Survey (J. Schmidt, written commun., 2001).
Alteration: The basalt is oxidized.
Commodities (Major) - Au; (Minor) - Ag, Cu, Sb
Development Status: None
Deposit Model: Basaltic copper? (Cox and Singer, 1986; model 23?)
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: | TK040 |
|---|
Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Wrangellia DomainDomain
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References
