Neil Prospect, Chisana Mining District, Valdez-Cordova Census Area, Alaska, USAi

Regional Level Types
Neil Prospect	Prospect
Chisana Mining District	Mining District
Valdez-Cordova Census Area	Census Area
Alaska	State
USA	Country

The prospect is in the Wrangell-St. Elias National Preserve.
Location: This prospect is on the northeast flank of the ridge between the west and middle forks of Bond Creek. It is at an elevation of about 4,800 feet, about 2,000 feet south of the junction of the middle and east forks of Bond Creek. The site is near the center of section 12, T. 5 N., R. 14 E. of the Copper River Meridian. This is National Park Service locality WRST-36 (unpublished data) and the coordinates for this prospect were provided by the National Park Service.
Geology: An unpublished National Park Service map and accompanying database identify this locality as a copper prospect. The bedrock in this area is dominantly granitic rocks of the mid-Cretaceous Nabesna pluton (Richter, 1973). This pluton is locally intruded by dikes, small irregular bodies, and stocks of hornblende-plagioclase porphyry. This porphyry is considered to be Tertiary in age (Richter, 1973).
Workings: Some surface prospecting probably occurred here.
Age: Mid-Cretaceous? K/Ar ages for the Nabesna pluton range from 105 +/- 4.0 to 114 +/- 3.4 Ma (Richter and others, 1975; Richter, Lanphere, and Matson, 1975). Many varieties of hornblende-plagioclase porphyry form irregular intrusive bodies into the Nabesna pluton and other regional bedrock units in the area; the porphyry is considered to be Tertiary in age (Richter, 1973).

Commodities (Major) - Cu
Development Status: None
Deposit Model: Porphyry Cu-Mo? (Cox and Singer, 1986; model 21a)

Other Databases

Link to USGS - Alaska:	NB066

Other Regions, Features and Areas containing this locality

References