|Quadrangle map, 1:250,000-scale||CA|
|Quadrangle map, 1:63,360-scale||B-5|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This occurrence is at an elevation of about 1,250 feet near the divide at the head of Quartz Creek. The site is in section 15, T. 1 N., R. 13 W., of the Kateel River Meridian. Miller and Elliott (1969), figure 2, location 27.|
Geologic descriptionThis occurrence is located adjacent to the mid-Cretaceous Quartz Creek pluton, a hook-shaped, quartz monzonite body. The pluton is surrounded by a N 15 W-trending alteration zone about 18 miles long and 2 to 5 miles wide. The alteration zone is in Jurassic-Cretaceous andesitic volcanic rocks, and is marked by carbonate-quartz replacement, and tourmaline. Fine-grained dikes of varying composition cut the andesites near the pluton. Dikes near the Quartz Creek pluton are locally mineralized. This occurrence is a sulfide-bearing, oxidized carbonate zone in altered andesite. A composite grab sample contained: 200 ppm Ag (5.8 ounces Ag per ton), greater than 500 ppm Cd, 200 ppm Cu, greater than 2% Pb, and greater than 1% Zn (Miller and Elliott, 1969, location 27).
|Geologic map unit||(-161.342643529204, 65.489327033185)|
|Mineral deposit model||Sulfides in altered andesite.|
|Age of mineralization||Late Cretaceous.|
|Alteration of deposit||Carbonate-quartz replacement and tourmaline.|
|Workings or exploration||The area has been mapped by the U.S. Geological Survey and examined by various exploration companies.|
|Indication of production||None|
Additional commentsThis site is one of numerous occurrences of argentiferous galena, sphalerite, pyrite and arsenopyrite in an 18-mile-long, 2- to 5-mile-wide zone of altered andesite surrounding the Quartz Creek quartz monzonite pluton. The altered zone trends N 15 W, across the drainage basins of Quartz Creek and the Kiwalik River, parallel to prominent lineaments in the area.
|Reporters||Anita Williams (Anchorage, AK)|
|Last report date||1/12/2000|