Roberts No. 1 Prospect, Delta River Mining District, Southeast Fairbanks Census Area, Alaska, USAi
Regional Level Types | |
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Roberts No. 1 Prospect | Prospect |
Delta River Mining District | Mining District |
Southeast Fairbanks Census Area | Census Area |
Alaska | State |
USA | Country |
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Latitude & Longitude (WGS84):
63° 35' 56'' North , 146° 15' 46'' West
Latitude & Longitude (decimal):
Type:
KΓΆppen climate type:
Mindat Locality ID:
199701
Long-form identifier:
mindat:1:2:199701:2
GUID (UUID V4):
00df809c-1b07-4cfa-9bfa-d47d4e37434d
Location: The Roberts No. 1 prospect is at an elevation of about 7,700 feet on a steep ridge about 3.8 miles north-northeast of McGinnis Peak. The prospect is about 1,100 feet south-southeast of the center of section 19, T. 15 S., R. 8 E., Fairbanks Meridian. Nokleberg and others (1991) designated the Roberts No. 1 as locality N8 in their table 2.
Geology: The Roberts No. 1 prospect consists of a massive sulfide lens in quartz-chlorite-calc schist. Sedimentary and volcanic protoliths of the schist are of Devonian age (Nokleberg and Aleinikoff, 1985 ; Aleinikoff and Nokleberg, 1985 [C 967]). The lens consists of pyrrhotite, pyrite, sphalerite, chalcopyrite, and some galena.
Workings: Grab samples contain as much as 2.3 percent zinc, 0.26 percent copper, 0.03 percent lead, and 70 parts per million tin (Nokleberg and others, 1991). There are no extensive workings.
Age: Devonian, the protolith age of the host rock.
Commodities (Major) - Cu, Zn; (Minor) - Pb, Sn
Development Status: None
Deposit Model: Kuroko massive sulfide (Cox and Singer, 1986; model 28a).
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
5 valid minerals.
Detailed Mineral List:
β Chalcopyrite Formula: CuFeS2 |
β Galena Formula: PbS |
β Pyrite Formula: FeS2 |
β Pyrrhotite Formula: Fe1-xS |
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 | Chalcopyrite | 2.CB.10a | CuFeS2 |
β | Pyrrhotite | 2.CC.10 | Fe1-xS |
β | Galena | 2.CD.10 | PbS |
β | Pyrite | 2.EB.05a | FeS2 |
List of minerals for each chemical element
S | Sulfur | |
---|---|---|
S | β Chalcopyrite | CuFeS2 |
S | β Galena | PbS |
S | β Pyrite | FeS2 |
S | β Pyrrhotite | Fe1-xS |
S | β Sphalerite | ZnS |
Fe | Iron | |
Fe | β Chalcopyrite | CuFeS2 |
Fe | β Pyrite | FeS2 |
Fe | β Pyrrhotite | Fe1-xS |
Cu | Copper | |
Cu | β Chalcopyrite | CuFeS2 |
Zn | Zinc | |
Zn | β Sphalerite | ZnS |
Pb | Lead | |
Pb | β Galena | PbS |
Other Databases
Link to USGS - Alaska: | MH009 |
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Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
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