Rock Creek Prospect (Molybdenum), Chistochina Mining District, Valdez-Cordova Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Rock Creek Prospect (Molybdenum) | Prospect |
| Chistochina Mining District | Mining District |
| Valdez-Cordova Census Area | Census Area |
| Alaska | State |
| USA | Country |
This page is currently not sponsored. Click here to sponsor this page.
Latitude & Longitude (WGS84):
62° 35' 58'' North , 143° 21' 10'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Mentasta Lake | 112 (2011) | 41.6km |
The prospect is in the Wrangell-St. Elias National Preserve.
Location: This prospect is on the ridge between Rock Creek and Little Jack Creek. It is at an elevation of about 5,300 feet, 1,800 feet southwest of peak 6315, and 4,000 feet southeast of saddle 5310. The site is near the center of the south boundary of section 33, T. 10 N., R. 11 E. of the Copper River Meridian. This is locality 4 of Richter and Schmoll (1973), locality 6 of Richter and others (1975), and National Park Service locality WRST-5 (unpublished data). Cobb and Richter (1980) included this prospect under the name 'Rock Cr.'. It is located to within a few hundred feet.
Geology: Books of molybdenite up to 1.5 inches in diameter occur in a pegmatite dike that cuts alkali gneiss. High grade samples were reported to average about 3 percent molybdenum (Smith, 1939). The pegmatite dike strikes N 20 W, dips 60 SW, ranges from a few inches to 2 feet in thickness and can be traced for 70 feet on the surface. Some molybdenite occurs as flakes, blebs, and veinlets disseminated in finer grained parts of the alkali gneiss (Moffit, 1943, 1954). The gneiss intrudes metavolcanic rocks of the upper Paleozoic, Tetelna Volcanics (Richter and Schmoll, 1973; Richter, 1976). This deposit was staked in 1936 and explored by open cuts; soon after. Kennecott Copper Corporation drove a 160-foot-long adit under the exposed mineralization in 1937. They did not find molybdenite in the adit and further exploration has been restricted to surface observations and sampling.
Workings: This deposit was staked in 1936 and explored by open cuts; soon after. Kennecott Copper Corporation drove a 160-foot-long adit under the exposed mineralization in 1937. They did not find molybdenite in the adit and further exploration has been restricted to surface observations and sampling.
Age: Early Jurassic or older; K/Ar ages indicate an Early Jurassic or older age for the host intrusive complex (Richter and others, 1975).
Commodities (Major) - Mo
Development Status: None
Deposit Model: Molybdenum in pegmatite dike
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:
| ⓘ Molybdenite Formula: MoS2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Molybdenite | 2.EA.30 | MoS2 |
List of minerals for each chemical element
| S | Sulfur | |
|---|---|---|
| S | ⓘ Molybdenite | MoS2 |
| Mo | Molybdenum | |
| Mo | ⓘ Molybdenite | MoS2 |
Other Databases
| Link to USGS - Alaska: | NB010 |
|---|
Other Regions, Features and Areas containing this locality
This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to
visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders
for access and that you are aware of all safety precautions necessary.
