DIAMOND DRILLING IN THE SOUTHERN BLACK HILLS, FALL RIVER COUNTY, SOUTH DAKOTA

Technical Report · Sat Oct 01 04:00:00 EDT 1955

OSTI ID:4099772

Bartley, R C

During the winter of 1954 to 1955, a total of 12,472 feet was drilled in 42 holes in two separate areas of the southern Black Hills about 8 miles northeast of Edgemont, South Dakota. The drilling was done to corroborate the results of a surface resistivity survey, to develop ore guides applicable to subsurface exploration, and to gain a better understanding of the regional changes in lithology. Carnotite-type ores are found in the sandstones of the Dakota and Fall River formations of the Inyan Kara group of Early Cretaceous age and are analogous in occurrence to secondary ores of the Salt Wash sandstone member of the Morrison formation of Late Jurassic age on the Colorado Plateau. Changes in lithology are believed to be the most important single factor in ore deposition. Tectonic and sedimentary structures play a major role in ore deposition and, where both of these factors reach an optimum, ore deposition appears most favorable. (auth)

• Research Organization: Grand Junction Operations Office. Production Evaluation Div., AEC
• NSA Number: NSA-15-009183
• OSTI ID: 4099772
• Report Number(s): RME-1067(Rev.)
• Country of Publication: United States
• Language: English

Related Subjects

CARNOTITE
DEPOSITS
ELECTRIC CONDUCTIVITY
GEOLOGY
GEOLOGY, MINERALOGY, AND METEOROLOGY
MEASURED VALUES
ORES
PROSPECTING
SANDSTONES
WELL LOGGING