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Preliminary results of induced polarization-resistivity surveys in the Northgate district, Colorado
Gordon Robert Francis Johnson
1971, Open-File Report 71-159
Induced polarization (I.P.) and resistivity surveys were made at selected locations in the Northgate district, Jackson County, Colorado. The objectives of the study were (1) to determine the feasibility of detecting and delineating pyrite-altered zones adjacent to fluorsparmineralized veins, and (2) to locate buried or obscured extensions of these fluorspar...
Selected fluvial monazite deposits in the southeastern United States
William C. Overstreet, A. M. White, P. K. Theobald, D. W. Caldwell
1971, Open-File Report 71-222
Farther southwest in Georgia, around Griffin and Zebullon, along streams tributary to the Flint River in the monazite belt the flood plains are generally small and discontinuous, and only about 1 percent of the sediment is gravel. The area between Griffin, Zebullon, and the Flint River is underlain by biotite...
Geochemical maps of Samrah and vicinity, Kingdom of Saudi Arabia
P. K. Theobald, Charles Emmet Thompson
1971, Open-File Report 71-280
Geochemical maps of Samrah and vicinity, near Ad Dawadimi, display anomalies for the ore metals over each of the major ancient mining sites, a large contamination anomaly over the ancient ore-processing waste, and less-well defined anomalies parallel to mineralized structures. Zirconium and lanthanum display negative anomalies over altered rocks, do...