Unnamed Occurrence (ARDF - TN044; near Garnet Creek), Rampart Mining District, Yukon-Koyukuk Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Unnamed Occurrence (ARDF - TN044; near Garnet Creek) | - not defined - |
| Rampart Mining District | Mining District |
| Yukon-Koyukuk Census Area | Census Area |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
65° 20' 50'' North , 150° 27' 25'' West
Latitude & Longitude (decimal):
Köppen climate type:
Location: This site represents a rock sample collected by the Alaska Division of Geological and Geophysical Surveys (ADGGS) from the west side of Garnet Creek at 1000-foot elevation, approximately 0.5 mile downstream from the junction of Garnet and Rock creeks (sample 96KC192A, Liss and others, 1997). The sample location is in the northwest quarter of section 16, T. 6 N., R. 14 W., of the Fairbanks Meridian. The location is accurate within 1000 feet.
Geology: Bedrock in the Garnet Creek area consists of Triassic to Mississippian Rampart Group basalt, gabbro, and sedimentary rocks in fault contact with Tertiary basalt and rhyolite (Reifenstuhl and others, 1997 [RI-15a]). Garnet Creek appears to follow the trace of a high-angle fault. At this site, the west side of the creek is bordered by steep cliffs of volcanic rocks (Karen Clautice, unpub. field notes, 1996). A sample (96KC192A) of a 10-inch-wide zone of orange-brown limonite in light gray aphanitic rhyolite contained 227 parts per billion gold and 14 parts per million antimony (Liss and others, 1997). The limonite appears to coat an east-trending joint that dips 70N. A cribbed shaft near the junction of Garnet and Rock creeks about 0.5 mile from this site indicates placer gold prospecting.
Workings: A sample (96KC192A) of a 10-inch-wide zone of orange-brown limonite in light gray aphanitic rhyolite contained 227 parts per billion gold and 14 parts per million antimony (Liss and others, 1997). The limonite appears to coat an east-trending joint that dips 70N. A cribbed shaft near the junction of Garnet and Rock creeks about 0.5 mile from this site indicates placer gold prospecting.
Age: Tertiary or younger, inferred from the age of the volcanic host rocks.
Commodities (Major) - Au; (Minor) - Sb
Development Status: None
Deposit Model: Low-sulfide Au-quartz veins(?) (Cox and Singer, 1986; model 36a).
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 | |||
|---|---|---|---|
| ⓘ | 'Limonite' | - | |
List of minerals for each chemical element
Other Databases
| Link to USGS - Alaska: | TN044 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Angayucham TerraneAccretionary Complex
- Ruby DomainDomain
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