No abstract available

No abstract available

No abstract available

No abstract available

[en] Mineral surveys conducted in 1978 show that the Sierra Ancha Wilderness has demonstrated resources of uranium, asbestos, and iron; probable and substantiated resource potential for uranium, asbestos, and iron; and a probable resource potential for fluorspar. Uranium resources occur in vein and stratabound deposits in siltstone that underlies much of the wilderness. Deposits of long-staple chrysotile asbestos are likely in parts of the wilderness adjacent to known areas of asbestos production. Magnetite deposits in the wilderness form a small iron resource. A fluorite resource may exist in the northern part of the wilderness east of a notable fluorite that is located in a comparable geologic setting 1.4 mi west of the wilderness boundary. No fossil fuel resources were identified in this study

[en] As part of the long-range plans for the Energy Fuels Corporation, they have embarked on one of the most active and aggressive uranium exploration programs in the US. These exploration efforts are located in the northwestern part of Arizona in an area referred to as the Arizona Strip. At a time when the domestic uranium industry is staggering to recover from its worst economic slump, Energy Fuels is spending millions of dollars a year on exploration, development, production, and milling. The reason for Energy Fuels' commitment to uranium exploration and production lies in the ground of Arizona in unique geologic formations called breccia pipes. Some of these structures, generally no more than 300 to 350 ft in diameter, contain uranium that is, on the average, five to ten times richer than ore found elsewhere in the US. The richness of this Arizona ore makes it the only conventionally mined uranium in the US that can compete in today's market of cheaper, high-grade foreign sources. Between January 1980 and December 1986, Energy Fuels has mined more than 10 billion lb of uranium from breccia pipe deposits at an average grade of 0.65% U₃O₈. Currently, Energy Fuels is operating six breccia pipe mines, and a plan of operations on a seventh mine has been submitted to the appropriate government agencies for the necessary mining permits

[en] This paper describes a radioactive waste management program instituted at the University of Arizona at a Master of Science (MS) level. The program was developed with the coordination of five academic departments in the College of Engineering and Mines by the joint agreement of common core courses to be required of all participants. The concepts is to qualify the student for an MS degree in a primary discipline with a specialty in radioactive waste management

[en] The Muggins Mountains Wilderness Study Area covers approximately 8,855 acres immediately south of the Yuma Proving Ground. This study area contains sand and gravel, and it has a moderate potential for gold in placer deposits. One small drainage basin along the southeast boundary of this study area has a moderate potential for uranium. This study area has a low potential for geothermal energy and for oil and gas resources

[en] On the basis of geologic studies and mineral evaluations made between 1973 and 1977, most of the Superstition Wilderness and adjoining areas are judged to have little promise for occurrence of mineral resources. However, two areas in an east-trending zone near the southern margin of the area, marked by spotty occurrences of mineralized rock, prospect pits, and a band of geochemical anomalies that coincides with alined magnetic anomalies, are considered to have probable mineral-resource potential. This zone lies within about 6 mi of two productive mines in Arizona's great copper belt, and the trend of the zone is parallel to many of the significant mineralized structures of this belt. A small isolated uranium anomaly was found in the northeastern part of the wilderness, but no evidence of other energy resources, such as petroleum, coal, or geothermal, was found

[en] Using a thermal-inertia mapping algorithm which provides greater discrimination capability than those in current use, a geologic feature was detected in the Cabeza Prieta, Arizona, area. Initially seen on an image formed as a difference of two thermal-inertia images, it was found to be the extension of a bilaterally symmetrical aeromagnetic feature which trends northeast for a distance of at least 1200 km