Prospect, Active

Commodities and mineralogy

Main commodities Ag; Au
Ore minerals gold

Geographic location

Quadrangle map, 1:250,000-scale TY
Quadrangle map, 1:63,360-scale D-8
Latitude 61.8346
Longitude -152.83
Nearby scientific data Find additional scientific data near this location
Location and accuracy The Bonanza prospect is about 3.2 miles east-southeast of Mount Estelle and about 0.5 mile southwest of the center of section 12, T. 20 N., R. 20 W. The location is accurate.

Geologic setting

Geologic description

The date of the original discovery of the Bonanza prospect is uncertain; it probably was discovered when Cominco Alaska worked in the area from 1986 to 1989 (Wahl and others, 2008). Kennecott Exploration Company was active in the area from 2004 to 2006 and staked a large block of claims that covered the Bonanza prospect. Geoinformatics Exploration Inc. acquired the property from Kennecott in 2007, and in 2009, Kiska Metals Corporation was formed by a merger of Geoinformatics and Rimfire Minerals Corporation. As of early 2010, Kiska Metals (2010a) was actively exploring their claim blocks as the Whistler project.
The Bonanza prospect is along about 600 meters of the contact of diorite with hornfelsed sediments (Kiska Metals Corporation, 2010b). Twenty samples were collected. Eleven contained more than 1 gram of gold per tonne and the best contained 69.12 grams of gold per tonne. There is little more information on the prospect other than it and their other prospects in the Muddy Creek area have 'high-grade gold-silver and base metals' and the rocks in the general area consist of monzonite porphyry and hornfels. The plutonic rocks are probably part of the Mount Estelle pluton to the east (Wilson and others, 2009) that Reed and Lanphere (1972) dated at 65 to 66 Ma. See ARDF record TY019 for a general description of the mineralization associated with the Mount Estelle pluton in this area.
Geologic map unit (-152.83221965547, 61.8340065981772)
Mineral deposit model '... high-grade gold-silver and base metals...' mineralization.
Age of mineralization Probably coeval with or younger than the 65 to 66 Ma Mount Estelle pluton.
Alteration of deposit Not mentioned.

Production and reserves

Workings or exploration Apparently only surface sampling.
Indication of production None
Reserve estimates None.
Production notes None.



Kiska Metals Corporation, 2010a, Whistler project overview; (as of February 26, 2010).
Kiska Metals Corporation, 2010b, Geoinformatics portfolio - Muddy Creek, Alaska: (as of February 27, 2010).
Wahl, George, Coutture, Jean-Francois, and Keller, GD., 2008, Mineral resource estimation, Whistler copper-gold project, Alaska Range, Alaska: Technical report for Geoinformatics Exploration, Inc., 124 p. (posted on, February 22, 2008).
Reporters D.J. Grybeck (Contractor, U.S. Geological Survey)
Last report date 4/2/2010