Camel Gypsum

Prospect, Undetermined

Commodities and mineralogy

Main commodities Gypsum
Ore minerals gypsum

Geographic location

Quadrangle map, 1:250,000-scale SI
Quadrangle map, 1:63,360-scale D-3
Latitude 57.9118
Longitude -134.9613
Nearby scientific data Find additional scientific data near this location
Location and accuracy The Camel Gypsum prospect is at an elevation of about 100 feet, about 0.4 mile northwest of Flints Point in Iyoukeen Cove. The mine is 0.4 mile east-northeast of the center of sec. 1, T. 46 S., R. 64 E. It is location P-20 of Bittenbender and others (1999) and MAS no. 0021140040 (U.S. Bureau of Land Management, 2002). The location is accurate.

Geologic setting

Geologic description

The rocks in the vicinity of the Camel Gypsum prospect are part of the Mississippian, Iyoukeen Formation (Lathram and others, 1965). The upper half of the formation is cherty fossiliferous limestone; the lower half is fossiliferous shale with minor limestone. A Cretaceous hornblende-biotite quartz monzonite stock is about 1.5 miles north of the prospect.
The Camel Gypsum deposit was discovered in 1902 and is similar to the nearby Kaiser Gypsum Mine (SI059) which was discovered a few years earlier. By 1942, the deposit was developed by 5 adits, 3 winzes, and more than 1,000 feet of underground workings (Jermain and Rutledge, 1950). In 1948, the U.S. Bureau of Mines reopened some of the workings, sampled them, and drilled two holes. They drilled four more holes in 1962. There has been no production. Jermain and Rutledge (1950) estimated the indicated and inferred resources at the Camel Gypsum deposit as 92,500 tons of gypsum.
The origin of the deposit is unclear and most people who have described it or the nearby Kaiser Gypsum Mine (SI059) are uncertain whether they are bedded syngenetic deposits or epigenetic deposits related to a nearby quartz monzonite intrusion (Wright, 1907; Burchard, 1920; Steward, 1932; Flint and Cobb, 1953; Bittenbender and others, 1999). At least locally, the deposit is underlain by limestone breccia and overlain by conglomerate. Solution cavities filled with gravel are common.
Geologic map unit (-134.963082995884, 57.9114613650977)
Mineral deposit model Gypsum of debatable origin.
Age of mineralization If sedimentary, the gypsum is Mississippian, the age of the formation that hosts it. If epigenetic, the gypsum may be related to nearby Cretaceous quartz monzonite.

Production and reserves

Workings or exploration The Camel Gypsum deposit was discovered in 1902 and is similar to the nearby Kaiser Gypsum Mine (SI059) which was discovered a few years earlier. By 1942, the deposit was developed by 5 adits, 3 winzes, and more than 1,000 feet of underground workings (Jermain and Rutledge, 1950). In 1948, the U.S. Bureau of Mines reopened some of the workings, sampled them, and drilled two holes. They drilled four more holes in 1962.
Indication of production None
Reserve estimates Jermain and Rutledge (1950) estimated the indicated and inferred resources at the Camel Gypsum deposit as 92,500 tons of gypsum.

References

References

Bittenbender, P., Still, J.C., Maas, K., and McDonald, M., Jr., 1999, Mineral resources of the Chichagof and Baranof Islands area, southeast Alaska: Bureau of Land Management, BLM-Alaska Technical Report 19, 222 p.
Gnagy, W L., 1962, Some notes on, and a tentative summary of, the genesis of the gypsum deposits at the Pacific Coast Mine, Gypsum Creek and Gypsum Camel, Iyoukeen Cove, Chichagof Island, southeast Alaska: Unpublished petrographic report, No. 2-43, U. S. Bureau of Mines, 5 p. (Report held by the Mineral Information Center, Bureau of Land Management, Juneau, Alaska.)
Jermain, G.D., and Rutledge, F.A,, 1950, Diamond drilling the Gypsum-Camel prospect, Iyoukeen Cove, Chichagof Island. southeastern Alaska, confidential section: Unpublished U. S. Bureau of Mines report, 3 p. (Report held by the Mineral Information Center, Bureau of Land Management, Juneau, Alaska.)
Redman, Earl, 1989, Mining gypsum at Iyoukeen Cove: Unpublished report, 5 p. (Report held by the Mineral Information Center, Bureau of Land Management, Juneau, Alaska.)
Roppel, Patricia, 1973, Gypsum: Alaska Journal, V. 3, no. 3, p. 149-152.
U.S. Bureau of Land Management, 2002, Alaska mineral locations database report (Sitka quadrangle), July 2, 2002, 205 p. [http://imcg.wr.usgs.gov/dem.html]
U.S. Bureau of Mines, 1962, Results of diamond drilling at the Camel Gypsum deposit, Iyoukeen Cove, Chichagof Island, southeast Alaska: Unpublished report. (Report held by the Mineral Information Center, Bureau of Land Management, Juneau, Alaska.)
Reporters Donald Grybeck (U.S. Geological Survey)
Last report date 5/5/2005