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Reconnaissance of Metal Mining in the San Juan Region: Ouray, San Juan, and San Miguel Counties, Colorado

Description: Report issued by the U.S. Bureau of Mines discussing metal mines in Colorado. As stated in the summary, "this paper describes the mineral deposits and discusses mining and milling methods and related operating conditions in an important gold, silver, lead, and zinc producing area in Ouray, San Juan, and San Miguel Counties, Colo., embracing 250 square miles" (p. 5). This report includes tables, maps, and illustrations.
Date: March 1950
Creator: King, William H. & Allsman, Paul T.
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Carnotite Resources of the Legin Group Area, San Miguel County, Colorado

Description: From abstract: The Legin group area comprises five privately owned claims, nine Government claims, and some public land. The area is in parts of secs. 28 and 29, T. 43 N., R. 19 W., New Mexico principal meridian, San Miguel County, Colo. It is about 45 miles from the Government mill at Monticello, Utah, and 50 miles from the Vanadium Corporation of America mill at Naturita, Colo. The Legin group area has yielded a total production of more than 18,000 short tons of carnotite ore that averaged 0.… more
Date: July 1952
Creator: Bell, Henry
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Preliminary Report on Exploration in the Spud Patch Area, San Miguel County, Colorado

Description: From introduction: From November 1949 to May 1952, the U. S. Geological Survey explored the Spud Patch area by diamond drilling to find carnotite deposits that would make new mines and to appraise the reserves of the area. Previous work and a brief outline of the general geology of the area have been reported (Bell and Icke, 1950; and Bell, 1952).
Date: 1952
Creator: Hilpert, Lowell S.
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Preliminary Results of Radiometric Reconnaissance of Parts of the Northwestern San Juan Mountains, Gunnison, Ouray, San Juan, San Miguel, and Dolores Counties, Colorado

Description: From abstract: A reconnaissance radiometric survey of parts of the northwestern San Juan Mountains has revealed the occurrence of uranium-bearing ores in several mining districts in Ouray and San Juan Counties, and the occurrence of thorium-bearing veins in southwestern Gunnison County.
Date: March 1952
Creator: Burbank, W. S. & Pierson, Charles Thomas
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Preliminary Appraisal of Diamond-Drill Exploration in the Legin Group Area, San Miguel County, Colorado

Description: From introduction: This preliminary report summarizes the results of the 1950 drilling in the Legin group area of San Miguel County, Colorado and gives a more complete, but preliminary, estimate of the uranium and vanadium ore reserves. When the radiometric and chemical assay data are completed, a detailed report will be transmitted.
Date: February 1951
Creator: Bell, Henry
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Preliminary Report on Diamond-Drill Exploration of the Legin Group Area, San Miguel County, Colorado

Description: From introduction: The results of U. S. Geological Survey exploration in the Legin group area are summarized briefly in this preliminary report. No additional drilling is planned. The Legin group area comprising nine Government-owned claims, three privately owned claims and adjoining public land, is in San Miguel County, Colo. The area explored includes parts of secs. 28 and 29, T. 43 N., R. 19 W., New Mexico principal meridian (fig. 1).
Date: October 1951
Creator: Bell, Henry
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Carnotite Resources in the Charles T. Area and Vicinity, San Miguel County, Colorado

Description: Report discussing an exploratory drilling program in the Charles T. area and vicinity during the period from November 1947 and September 1949. "The purpose of the exploration was to discover new carnotite deposits to support milling operations on the Colorado Plateau, and to appraise the uranium and vanadium resources of the area explored."
Date: March 1950
Creator: Bush, Alfred L.
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Directional Resistivity Measurements in Exploration for Uranium Deposits on the Colorado Plateau

Description: The following report covers a study of the electrical properties of the Morrison formation in the Uravan mineral belt of the Colorado Plateau province where it is indicated that there is a significant correlation between electrical resistivity and the relative favorability for occurrence of ore. This report presents the measurements of resistivity trends.
Date: April 1958
Creator: Keller, George V.
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