Unnamed Occurrence (ARDF - SM067; southwestern Buckstock Mountains), Aniak Mining District, Bethel Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Unnamed Occurrence (ARDF - SM067; southwestern Buckstock Mountains) | - not defined - |
| Aniak Mining District | Mining District |
| Bethel Census Area | Census Area |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
61° 8' 28'' North , 158° 45' 57'' West
Latitude & Longitude (decimal):
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Chuathbaluk | 125 (2017) | 54.3km |
Mindat Locality ID:
201653
Long-form identifier:
mindat:1:2:201653:8
GUID (UUID V4):
3681615e-297e-45d8-b65b-551ffdf9081a
Location: This occurrence is a 0.6-mile-long area on a northeast-trending ridge overlooking an unnamed tributary of the Buckstock River. The coordinates are for the center of the area which is at elevation of about 1,900 feet in the SE1/4 sec. 12, T. 12 N., R. 53 W., of the Seward Meridian. The location is accurate.
Geology: This occurrence consists of a large swarm of hydrothermally altered of dikes of granite porphyry to alaskite that intrudes sedimentary rocks of the Mesozoic Gemuk Group (Cady and others, 1955; T.K. Bundtzen, unpublished field field data, 1999). The altered area includes numerous quartz-tourmaline-axinite-bearing veins that are associated with highly altered felsic dikes that, based on rubble-crop, strike northeast and dip steeply. The zone of alteration can be traced N70E about 0.6 mile and has a width of from 50 to 300 feet. The quartz veins contains blades of an unidentified gray sulfide mineral in small hairline fractures. In some areas the alteration zone contains tourmaline and axinite-bearing breccias that replace alaskite dikes. Grab samples of tourmaline-quartz veins contain up to 437 parts per million (ppm) arsenic, 700 parts per billion (ppm) silver, 18 ppb gold, and 29 ppm antimony (T.K. Bundtzen, unpublished analytical data, 1999).
Workings: Surface sampling and mapping was completed by the U.S. Geological Survey in 1999.
Age: Unknown. Miller and others (2002) give a U-Pb age of 59.2 Ma for the Buckstock pluton.
Alteration: Development of tourmaline-axinite-quartz greisen.
Commodities (Major) - Ag, As; (Minor) - Au, Sb
Development Status: None
Deposit Model: Silver-polymetallic veins? (Cox and Singer, 1986; model 20b).
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:
| ⓘ 'Axinite Group' |
| ⓘ Quartz Formula: SiO2 |
| ⓘ 'Tourmaline' Formula: AD3G6 (T6O18)(BO3)3X3Z |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 4 - Oxides and Hydroxides | |||
|---|---|---|---|
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| Unclassified | |||
| ⓘ | 'Tourmaline' | - | AD3G6 (T6O18)(BO3)3X3Z |
| ⓘ | 'Axinite Group' | - | |
List of minerals for each chemical element
| B | Boron | |
|---|---|---|
| B | ⓘ Tourmaline | AD3G6 (T6O18)(BO3)3X3Z |
| O | Oxygen | |
| O | ⓘ Quartz | SiO2 |
| O | ⓘ Tourmaline | AD3G6 (T6O18)(BO3)3X3Z |
| Si | Silicon | |
| Si | ⓘ Quartz | SiO2 |
Other Databases
| Link to USGS - Alaska: | SM067 |
|---|
Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Farewell buried DomainDomain
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References
