Unnamed Prospect (ARDF - TK099; in upper Granite Creek), Valdez Creek Mining District, Matanuska-Susitna Borough, Alaska, USAi

Regional Level Types
Unnamed Prospect (ARDF - TK099; in upper Granite Creek)	- not defined -
Valdez Creek Mining District	Mining District
Matanuska-Susitna Borough	Borough
Alaska	State
USA	Country

MAS/MIL number 20760059.
Location: This prospect extends for 2 miles along upper Granite Creek. It is centered at an elevation of 5,200 feet, 0.4 mile due north of the center of sec. 3, T. 25 N., R. 8 E., Seward Meridian. The location is accurate to within 1/2 mile.
Geology: This prospect consists of chalcopyrite, pyrite, and sphalerite(?) in a siliceous gouge zone near the contact between Upper Jurassic diorite and tuffaceous volcanic rocks of the Lower Jurassic, Talkeetna Formation (Kurtak and others, 1992). The gouge zone strikes N20E and dips 70 W. Rock samples from the south, valley wall of upper Granite Creek contain 1.2 part per million silver, 436 parts per million zinc, and 6,640 parts per million copper (Clautice and others, 1990). A U.S. Bureau of Mines 3.5-foot-long, chip sample of an iron-stained zone contains 0.87 percent zinc and 0.16 percent copper. A sulfide-rich float sample collected nearby contains 1.5 ounce silver per ton, 5.8 percent copper, and 2.4 percent zinc (Kurtak and others, 1992). This prospect may be genetically related to prospects at TK097 and TK098. Claims were staked in 1971 by Leo Mark Anthony, who conducted grid soil sampling and trenching.
Workings: Claims were staked in 1971 by Leo Mark Anthony, who conducted grid soil sampling and trenching. Rock samples collected the Alaska Division of Geological and Geophysical Surveys and the U.S. Bureau of Mines (Clautice and others, 1990; Kurtak and others, 1992).
Alteration: Alteration includes clay and silicification in fault gouge. Iron-oxide staining.

Commodities (Major) - Ag, Cu, Zn
Development Status: None
Deposit Model: Polymetallic vein (Cox and Singer, 1986; model 22c)

Other Databases

Link to USGS - Alaska:	TK099

Other Regions, Features and Areas containing this locality

References