Landmark Gap Prospect, Delta River Mining District, Valdez-Cordova Census Area, Alaska, USAi
Regional Level Types | |
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Landmark Gap Prospect | Prospect |
Delta River Mining District | Mining District |
Valdez-Cordova Census Area | Census Area |
Alaska | State |
USA | Country |
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Latitude & Longitude (WGS84):
63° 8' 15'' North , 146° 5' 45'' West
Latitude & Longitude (decimal):
Type:
KΓΆppen climate type:
Mindat Locality ID:
198446
Long-form identifier:
mindat:1:2:198446:3
GUID (UUID V4):
0bcc2818-5c72-4540-aed5-1e571fb96614
The mineralization is characterized by abundant vermilion so-called copper lichen.
Location: The Landmark Gap prospect is at an elevation of about 3,950 feet and west of Landmark Gap Lake. It is about at the center of section 31, T. 20 S., R. 9 E., Fairbanks Meridian. The location is accurate within about 800 feet.
Geology: The prospect is in metabasalt of the Nikolai Greenstone of Late Triassic age (Nokleberg and others, 1991). Mineralization at the site is stratiform; it ranges from 1 inch to 3 feet thick and consists of disseminated to massive chalcopyrite, pyrite, and minor bornite. The sulfides occur in cherty bands and in irregular quartz veins that surround pillows and breccia clasts. The prospect was discovered in 1996 by American Copper and Nickel Company; samples contained as much as 3.5 percent copper (W.T. Ellis, unpublished data, 1996). The deposit probably is syngenetic and possibly of Cyprus type.
Workings: American Copper and Nickel Company discovered the site in 1996 and collected samples as rich as 3.5 percent copper (W.T. Ellis, unpublished data, 1996). The area is on active MAN Resources claims.
Age: Late Triassic, the age of the host rock.
Alteration: Silicification.
Commodities (Major) - Cu
Development Status: None
Deposit Model: Although most of the deposits in the Nikolai Greenstone are of basaltic copper
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 Bornite Formula: Cu5FeS4 |
β Chalcopyrite Formula: CuFeS2 |
β Pyrite Formula: FeS2 |
β Quartz Formula: SiO2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
Group 2 - Sulphides and Sulfosalts | |||
---|---|---|---|
β | Bornite | 2.BA.15 | Cu5FeS4 |
β | Chalcopyrite | 2.CB.10a | CuFeS2 |
β | Pyrite | 2.EB.05a | FeS2 |
Group 4 - Oxides and Hydroxides | |||
β | Quartz | 4.DA.05 | SiO2 |
List of minerals for each chemical element
O | Oxygen | |
---|---|---|
O | β Quartz | SiO2 |
Si | Silicon | |
Si | β Quartz | SiO2 |
S | Sulfur | |
S | β Bornite | Cu5FeS4 |
S | β Chalcopyrite | CuFeS2 |
S | β Pyrite | FeS2 |
Fe | Iron | |
Fe | β Bornite | Cu5FeS4 |
Fe | β Chalcopyrite | CuFeS2 |
Fe | β Pyrite | FeS2 |
Cu | Copper | |
Cu | β Bornite | Cu5FeS4 |
Cu | β Chalcopyrite | CuFeS2 |
Other Databases
Link to USGS - Alaska: | MH182 |
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Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Wrangellia DomainDomain
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