Location: This site includes several mineralized exposures on the south side of the Jarvis Glacier in a steep walled canyon about 4 miles east-southeast from the Pleasant Camp border station on the Haines Highway. They are in the NE1/4, section 30, T. 28 S., R. 53 E. of the Copper River Meridian. The location corresponds to sample location 109 in Figure 8 of Still (1984 [OF 118-84]) and was informally termed the 'Jarvis Glacier Gulches' prospect by Still and others (1991).
Geology: According to Still (1984 [OF 118-84]), these occurrences are located in the Little Jarvis volcanic-sedimentary sequence (Redman, 1983) that consists of northwesterly striking basalt, andesite, and metasediments that include slate and limestone. Most of the occurrences are within the 'Pzsv' unit that consists of slate, limestone and andesite. This unit is capped by andesite and pillow basalt. The Little Jarvis sequence may be the same age as the Glacier Creek sequence, which hosts the Main Zone/Palmer prospect (SK066) (Redman, 1983). Rubicon Minerals(1998) interprets this prospect to be the most northwesterly prospect along a mineral trend that extends to the southeast through the RW Zone prospect (SK067) and Main Zone/Palmer prospect (SK066) to the Red Creek prospect (SK063) Still (1984 [OF 118-84] also cites an important mineralized exposure at an elevation of about 3,600 feet on the southwest side of the canyon shown as number 109 on figure 8. He describes this exposure as a zone of chlorite-altered metasediments and andesites containing lenses of massive and disseminated sulfide mineralization. The zone follows bedding, is up to 5 feet thick, and contains massive-sulfide lenses up to 0.5 feet across. It can be traced for about 100 feet or more. The sulfide lenses consist of pyrite, sphalerite, chalcopyrite, and galena in calcite- and quartz-rich rock. Samples contain up to 17.8% zinc, 0.3% lead, 1.3% copper, 11.56 ppm silver, and 0.163 ppm gold (Still, 1984 [OF 118-84]; Still and others, 1991). On the northeast side of the canyon just above the floor of the canyon at an elevation of 3,200 feet, quartz-stringer zones and sulfide zones are present. Samples of the sulfide zones at this site contained up to 6.1% zinc, 0.76% copper, 110 ppm cobalt, 4.64 ppm silver, and 0.127 ppm gold (Still, 1984 [OF 118-84]; Still and others, 1991). This prospect and other similar prospects in the Mt. Henry Clay area are probably correlative with the Windy Craggy deposit in Canada and the Greens Creek deposit on Admiralty Island and are therefore Late Triassic (Still and others, 1984 [OF 118-84]; Newberry and others, 1997).
Workings: Sulfide float found by the U. S. Bureau of Mines at the mouth of the steep north-draining canyon lead to the initial discovery of some of the occurrences here in August, 1983. Other occurrences were discovered by ALYU Mining Corporation in September, 1983.
Age: Probably Late Triassic based on correlation with the Greens Creek Mine on Admiralty Island and the Windy Craggy deposit in Canada (Still, 1984 [OF 118-84]); Newberry and others, 1997).
Alteration: Chloritic.

Commodities (Major) - Ag, Au, Ba, Cu, Pb, Zn
Development Status: No
Deposit Model: Probably a Kuroko- or Besshi-type volcanogenic massive sulfide system with asso

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.

Mineral List

10 valid minerals.