Drenchwater--East Prospect, Colville Mining District, North Slope Borough, Alaska, USAi
| Regional Level Types | |
|---|---|
| Drenchwater--East Prospect | Prospect |
| Colville Mining District | Mining District |
| North Slope Borough | Borough |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
68° 34' 11'' North , 158° 40' 48'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Location: Location plotted is site of samples NK13k and NK14b of Nokleberg and Winkler (1982, Pl. 2) and locality 65 of Jansons (1982, p. 17), in T10S, R29W; about 0.25 mi (0.4 km) west of False Wager Creek from a point about 2.25 mi (3.6 km) upstream from its confluence with Drenchwater Creek; located to within 2000 ft (610 m).
Geology: Apparently stratiform deposit of disseminated fine-grained galena, sphalerite, and pyrite, minor barite, and rare fluorite in black chert, and siliceous shale of the Mississippian to Lower Pennsylvanian(?) Kuna Formation of the Lisburne group. Sporadic occurrences of sphalerite and galena occur in a zone that extends about 1.25 mi (2 km) west-northwest from this locality parallel to the strike of bedding. Main discovery rubblecrop is semi-massive sulfide with quartz gangue. Sulfides probably syngenetic. Interbedded felsic to intermediate(?) composition volcanic rocks lie north of mineralized zone; stratigraphic top not known so Pb-Zn mineralization may either underlie or overlie the volcanic section. Some sulfides also present as fracture fillings and in boxwork silica. Area imbricated by thrust faults of various displacements (Nokleberg and Winkler, 1982).
Workings: Samples contain >10,000 ppm Zn, 1000 ppm Pb, 700 ppm Ba, and 20 ppm Ag (Nokleberg and Winkler, 1982, p. 16).
Age: K-Ar ages of 319+10 and 330+17 Ma were obtained from biotite from a volcanic interbed within the mineralized belt; a Pb-isotope model age of 200 Ma was obtained from galena.
Alteration: Silicification of minor carbonate layers in shale may be diagenetic.
Commodities (Major) - Pb, Zn; (Minor) - Ag, Ba
Development Status: No
Deposit Model: Lode; sediment-hosted Pb-Zn
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:
| ⓘ Fluorite Formula: CaF2 |
| ⓘ Galena Formula: PbS |
| ⓘ Pyrite Formula: FeS2 |
| ⓘ Quartz Formula: SiO2 |
| ⓘ Sphalerite Formula: ZnS |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Sphalerite | 2.CB.05a | ZnS |
| ⓘ | Galena | 2.CD.10 | PbS |
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
| Group 3 - Halides | |||
| ⓘ | Fluorite | 3.AB.25 | CaF2 |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Quartz | 4.DA.05 | SiO2 |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Quartz | SiO2 |
| F | Fluorine | |
| F | ⓘ Fluorite | CaF2 |
| Si | Silicon | |
| Si | ⓘ Quartz | SiO2 |
| S | Sulfur | |
| S | ⓘ Galena | PbS |
| S | ⓘ Pyrite | FeS2 |
| S | ⓘ Sphalerite | ZnS |
| Ca | Calcium | |
| Ca | ⓘ Fluorite | CaF2 |
| Fe | Iron | |
| Fe | ⓘ Pyrite | FeS2 |
| Zn | Zinc | |
| Zn | ⓘ Sphalerite | ZnS |
| Pb | Lead | |
| Pb | ⓘ Galena | PbS |
Other Databases
| Link to USGS - Alaska: | HW002 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
- Brooks RangeMountain Range
- Rocky MountainsMountain Range
North America PlateTectonic Plate
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