Unnamed Occurrence (ARDF - MM004; on Chitsia Mountain), Kantishna Mining District, Denali Borough, Alaska, USAi
Regional Level Types | |
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Unnamed Occurrence (ARDF - MM004; on Chitsia Mountain) | - not defined - |
Kantishna Mining District | Mining District |
Denali Borough | Borough |
Alaska | State |
USA | Country |
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Latitude & Longitude (WGS84):
63° 57' 51'' North , 150° 18' 18'' West
Latitude & Longitude (decimal):
KΓΆppen climate type:
Mindat Locality ID:
201332
Long-form identifier:
mindat:1:2:201332:2
GUID (UUID V4):
bd0c1810-c718-4e15-83e8-883700a5607e
The occurrence exemplifies stratiform, volcanogenic deposits in metarhyolite schist of the Upper Devonian to Mississippian Totatlanika Formation. It is in Denali National Park and Preserve.
Location: This 300-foot-long mineral occurrence (Cobb, 1980 [OFR 80-363]) is on a ridge crest about 2500 feet west-southwest of the top of Chitisia Mountain. The location is at the approximate midpoint of the occurrence and is accurate within 250 feet. The occurrence correponds to number 77 of Bundtzen, Smith, and Tosdal (1976), 58 of Hawley and Associates (1978), and 84 of Bundtzen (1981).
Geology: This occurrence is a stratiform deposit in schistose metarhyolite porphyry in the Upper Devonian to Mississippian Totatlanika Formation (Bundtzen, 1981, p. 82). The outcrop of the deposit is about 300 feet long and about 10 feet wide; it strikes ENE and dips about 30 NW (Hawley and Associates, 1978; fig. 4.1-A(3)). The deposit consists of barite-rich layers 1 to 6 inches thick in silicified(?) schist containing pyrite, galena, and sphalerite. Selected barite-rich samples contain 36-52 percent barium. Pyrite is fairly abundant; galena and sphalerite less so. Some grab samples assayed up to 3.1 percent lead and 0.8 ounce of silver per ton, but most contained 1 percent or less each of lead and zinc (Buntzen, Smith, and Tosdal (1976); Hawley and Associates, 1978; Bundtzen, 1981). The deposit is probably volcanogenic in origin, and formed in Late Devonian or Mississippian time.
Workings: The deposit was discovered during reconnaissance geologic mapping of the Kantishna district (Bundtzen, Smith, and Tosdal, 1976). There are no significant workings.
Age: The deposit is probably Late Devonian or Mississippian, the depositional age of the Totatlanika metarhyolite hostrock (Bundtzen, 1981).
Alteration: Silification of Totatlanika schistose metarhyolite.
Commodities (Major) - Ba; (Minor) - Ag, Pb, Zn
Development Status: No
Deposit Model: Distal, barite-rich, kuroko massive sulfide deposit (Cox and Singer, 1986; mode
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
4 valid minerals.
Detailed Mineral List:
β Baryte Formula: BaSO4 |
β Galena Formula: PbS |
β Pyrite Formula: FeS2 |
β Sphalerite Formula: ZnS |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
Group 2 - Sulphides and Sulfosalts | |||
---|---|---|---|
β | Sphalerite | 2.CB.05a | ZnS |
β | Galena | 2.CD.10 | PbS |
β | Pyrite | 2.EB.05a | FeS2 |
Group 7 - Sulphates, Chromates, Molybdates and Tungstates | |||
β | Baryte | 7.AD.35 | BaSO4 |
List of minerals for each chemical element
O | Oxygen | |
---|---|---|
O | β Baryte | BaSO4 |
S | Sulfur | |
S | β Baryte | BaSO4 |
S | β Galena | PbS |
S | β Pyrite | FeS2 |
S | β Sphalerite | ZnS |
Fe | Iron | |
Fe | β Pyrite | FeS2 |
Zn | Zinc | |
Zn | β Sphalerite | ZnS |
Ba | Barium | |
Ba | β Baryte | BaSO4 |
Pb | Lead | |
Pb | β Galena | PbS |
Other Databases
Link to USGS - Alaska: | MM004 |
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Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
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