Preliminary investigations indicate a potential tar sand accumulation in the Trapper Creek deposit of more than 2.13 million tons of mineralized material with a yield of 0.92 bbl per ton of 5.2° API oil for an approximate resource of 1.96 million bbl of recoverable petroleum. Remote sensing data suggest that the accumulation is in part controlled by two major and four minor lineaments which traverse the area. Stratigraphic and lithologic criteria can be used to infer a Minnelusa-type mode of occurrence. Ancillary stream sediment and outcrop geochemistry data yield locally anomalous but uneconomic concentrations of Mg, Ca, Ti, Mn, Ag, Cu, Mo, V, K, and Si, which may have significance in the identification of similar hydrocarbon accumulations along the west flank of th Bighorn Mountains.

End_of_Article - Last_Page 419------------