Unnamed (north of Glacier Bay Monument)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Mo
Ore minerals molybdenite

Geographic location

Quadrangle map, 1:250,000-scale SK
Quadrangle map, 1:63,360-scale A-3
Latitude 59.21
Longitude -136.07
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is at an elevation of approximately 4,000 feet. It is about 0.5 miles north of Peak 6725 on the northern boundary of Glacier Bay National Monument and 6.4 miles, N74W from the summit of Mount Krause. It is shown as location 10 of Cobb (1972 [MF 424]) and location BD 548 of Winkler and MacKevett (1970).

Geologic setting

Geologic description

Samples BD 548A and BD 548B of Winkler and MacKevett (1970) are described as 'Biotite granodiorite (?) with molybdenite disseminations'. Sample BD 548B contained 15 ppm Mo. The Cretaceous age of the host intrusive (Gilbert, 1988) establishes a maximum age for the deposit.
Geologic map unit (-136.07187626146, 59.2096331445846)
Mineral deposit model This is only an occurrence and there is very little information on it. The mineralization may be related to a porphyry copper system. The description from Winkler and MacKevett (1970) appears to be too mafic an association for a Climax type Mo deposit.
Age of mineralization The age is Cretaceous or younger, based upon the age of the host intrusive (Gilbert, 1988).

Production and reserves

Indication of production None