Kavanaugh and Boon; Esther Group Prospect, Prince William Sound Mining District, Valdez-Cordova Census Area, Alaska, USAi

Regional Level Types
Kavanaugh and Boon; Esther Group Prospect	Prospect
Prince William Sound Mining District	Mining District
Valdez-Cordova Census Area	Census Area
Alaska	State
USA	Country

Location: This prospect is at an elevation of 500 feet on the west side Esther Island, about 1,500 feet from the beach. It is in the W1/2 section 36, T. 9 N., R 7 E., of the Seward Meridian. This is location 167 of Tysdal (1978 [MF-880-A] and location S-126 of Jansons and others (1984). This location is accurate to within half a mile. Cobb and Tysdal (1980) summarized the relevant references under the name Kavanaugh and Boon.
Geology: The prospect is in sheared sandstone beds of the Valdez Group of Late Cretaceous age near the contact with the Esther granite of Tertiary age (Cobb and Tysdal, 1980). The deposit consists of stringers and masses of sugary quartz along a 5- to 6-foot-wide shear zone that strikes N40E and dips 85NW. Workings on the prospect consist of an 8-foot-long adit. A poorly defined zone of bluish quartz along the west wall of the adit contained considerable free gold, along with chlorite, chalcopyrite, pyrite, galena, and pyrrhotite (Roehm, 1938 [PE 95-14]). Three channel samples collected in 1937 contained 0.11, 0.08, and 0.75 ounce of gold per ton, along with traces of silver (Roehm, 1938 [PE 95-14]).
Workings: Workings on the prospect consist of an 8-foot-long adit with a small dump. A little ore was reported to have been shipped between 1911 and 1913 (Johnson, 1914 [B 592-G, p. 234]). Three channel samples collected in 1937 contained 0.11, 0.08, and 0.75 ounce of gold per ton, along with traces of silver (Roehm, 1938 [PE 95-14).
Age: Tertiary or younger; the veins are within a shear zone that cuts Tertiary granite.
Production: A little ore was reported to have been shipped between 1911 and 1913 (Johnson, 1914 [B 592-G, p. 234]).

Commodities (Major) - Au; (Minor) - Cu, Pb
Development Status: None
Deposit Model: Low-sulfide Au-quartz veins (Cox and Singer, 1986; model 36a)

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Link to USGS - Alaska:	SR086

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References