Unnamed (on south Fork Andrew Creek)

Occurrences, Inactive

Commodities and mineralogy

Main commodities Au
Ore minerals gold
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale PE
Quadrangle map, 1:63,360-scale C-1
Latitude 56.5686
Longitude -132.1044
Nearby scientific data Find additional scientific data near this location
Location and accuracy These occurrences are on the South Fork of Andrew Creek at an elevation of about 1000 feet. They are about 12.6 miles east-northeast of Wrangell near the center of section 23, T. 61 S., R. 85 E.

Geologic setting

Geologic description

During a reconnaissance examination of Andrew Creek, Still and others (2002) found a piece of quartz float with visible gold in the South Fork of Andrew Creek at an elevation of about 1,000 feet. They could not locate the lode source but several other samples of quartz float in the creek contained 137 to 1,992 parts per billion (ppb) gold. They also collected 21 stream-sediment sample and a panned concentrate. The stream sediment samples contained up to 493 ppb gold and the panned concentrate sample contained 1,058 ppb gold. Andrew Creek largely flows on Mesozoic and Paleozoic schist and gneiss that is intruded by Cretaceous tonalite plutons (Brew, 1997; Karl and others, 1999) . These make up the western border zone of the Coast Plutonic Complex. East of Andrew Creek the complex consists largely of Tertiary tonalite and migmatite. (Brew, 1997; Karl and others, 1999).
Geologic map unit (-132.106082720876, 56.5682655578741)
Mineral deposit model Visible gold in quartz float.
Age of mineralization Uncertain because the mineralization was not found in place.

Production and reserves

Workings or exploration Only sampling by government engineers and geologists.
Indication of production None

Additional comments

The area is now within the Stikine-LeConte Wilderness which is closed to mineral exploration and mining.

References

References

Reporters D.J. Grybeck (Port Ludlow, WA)
Last report date 4/8/2007