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The cooperative program between the Oklahoma Geological Survey and the U. S. Department of Energy has permitted evaluation of specific tar-sand deposits in Carter and Murray counties, Oklahoma. The Sulphur deposit was evaluated by a combination of industry and DOE-OGS boreholes. Bitumen content of the cores varied from 0 to 13 wt %, and “measured” in-place bitumen is approximately 34 million barrels. An additional 12. 5 million barrels of bitumen is considered “probable” at the Sulphur deposit. This site has several open pits and was worked until 1958; cumulative production is estimated at 1. 5 million tons. The bitumen occurs in an Ordovician sandstone, which is hydraulically mined, at other locations, for glass sand.

The South Woodford deposit contains 8 million barrels of “measured” in-place bitumen as defined by a nine-hole, 2. 5-mi transect. The bitumen is concentrated in vertical 26-m (85-ft) thick sandstone of Mississippian age. There are several oil seeps in the area, and bitumen occurs at the surface and at depths as great as 80 m (270 ft). The bitumen content of the recovered cores varied from 9. 5 to 14 wt %.

The tar-sand deposit located at the edge of Overbrook oil field contains “probable” in-place bitumen of approximately 3 million barrels. This deposit was evaluated by a single core and field relations. Bitumen content of the Pennsylvanian age sandstone varied from 2. 9 to 8. 0 wt %.

The Dougherty deposit was evaluated on the basis of field relations and bitumen yields from outcrop samples. The “probable” in-place bitumen is estimated to be 3. 5 million barrels.

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