Bentonite is a constituent in some drilling fluids.
Location: Deposit crops out in the Tuluvak Bluffs along the Chandler River. Accurate to within 1.6 kilometers (1 mi).
Geology: Cretaceous rocks at this locality contain bentonite beds that are as much as 1.5 meters thick. Beds that appear to be composed of nearly pure bentonite locally are present in the Colville Group and in the Niakogan Tongue of the Chandler formation and the Ninuluk Formation of the Nanushuk group. Bentonite is also a common detrital constituent in rocks of the Colville Group.
Workings: Type of workings: Surface.
Age: Early and Late Cretaceous
Commodities (Major) - Clay1
Development Status: No
Deposit Model: Lode; volcanogenic
References:
Cobb, E.H., 1975, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in northern Alaska: U.S. Geological Survey Open-File Report 75-628, 106 p. Detterman, R.L., Bickel, R.S., and Gryc, George, 1964, Geology of the Chandler River region, Alaska: U.S. Geological Survey Professional Paper 303E, p. 223-324.
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Map Reference: 69°10'48"N , 151°28'47"W
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