Fain Creek

Prospect, Active

Commodities and mineralogy

Main commodities Cu; Pb; Zn
Other commodities Ag; Au; Mn
Ore minerals pyrite

Geographic location

Quadrangle map, 1:250,000-scale RB
Quadrangle map, 1:63,360-scale D-4
Latitude 64.9856
Longitude -154.98896
Nearby scientific data Find additional scientific data near this location
Location and accuracy The approximate center of the Fain Creek prospect is located on a north-facing slope at about 2,500 feet of elevation in section 10, T. 6 S., R. 19 E. of the Kateel River meridian. The location is accurate. Fain Creek lies within Doyon, Limited selected land.

Geologic setting

Geologic description

The Fain Creek prospect is located along a northeast-trending contact between amphibolite and greenschist facies metamorphic rocks to the southeast and greenstone to the northwest (DiMarchi and others, 1990). A mixed unit, possibly a foliated tectonic melange, separates the metamorphic rocks from the greenstone, and it underlies the area from which anomalous stream sediment samples have been taken. The mixed unit includes quartzite, chlorite-quartz schist, pelitic schist, graphitic schist, and minor marble. The greenstone package consists of metamorphosed basalt and diabase that are in possible thrust contact with pelitic schist. Locally, the greenstone and the metamorphic rocks are cut by pegmatite and aplite dikes that are probably related to the Melozitna pluton to the north (DiMarchi and others, 1990).
The granitic stock at Fain Creek is argillically and sericitically altered and contains 1 to 3 percent pyrite (Northstar Exploration Company, 1999).
Soil samples collected in the Fain Creek area contain as much as 115 parts per billion gold, 6.6 parts per million silver, 463 parts per million copper, 4,310 parts per million lead, 4,040 parts per million zinc, and 9,525 parts per million manganese associated with iron and manganese stained fractures in quartzite (Northstar Exploration Company, 1999).
Contrasting geochemical signatures at Fain Creek suggest the presence of two styles of mineralization that may be unrelated to each other: (1) gold-based mineralization associated with a quartz veining event, and (2) lead-based, silver/base-metal mineralization (DiMarchi and others, 1990).
Soil, stream sediment, and rock sampled since at least 1989.
Geologic map unit (-154.991455034693, 64.985012092896)
Alteration of deposit Argillic and sericitic alteration occur in the granitic stock (Northstar Exploration Company, 1999).

Production and reserves

Workings or exploration Soil, rock, and stream sediment samples have been collected from the Fain Creek area since at least 1989 (DiMarchi and others, 1990; Northstar Exploration Company, 1999).
Indication of production None

Additional comments

The Fain Creek prospect lies within Doyon, Ltd. selected land. For more information, contact Doyon, Ltd.

References

References

DiMarchi, J., Weglarz, T.B., Dickey, C.F., Laux, D.P., Smith, M.T., Toro, J., and Kurtz, J.P., 1990, Central Alaska Gold Company 1990 Annual Report, Alaska Field Operations - Doyon Option Volume 1: held by Doyon, Limited, Fairbanks, Alaska.
North Star Exploration Company, 1999, North Star 1998 Annual Report, Block 18, Middle Yukon, DLR 99-33 (Report held by Doyon, Limited, Fairbanks, Alaska).
Reporters C.E. Cameron (Alaska Division of Geological and Geophysical Surveys)
Last report date 3/22/2000