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Floyd Gray

75 items:

Analytical results and sample locality maps of stream-sediment, heavy-mineral-concentrate, and rock samples from the Big Horn Mountains Wilderness Study Area (AZ-020-099), Maricopa County, Arizona Categories: Publication; Types: Citation; Tags: Open-File Report
Geologic map of the Growler Mountains, Pima and Maricopa counties, Arizona Categories: Publication; Types: Citation; Tags: Miscellaneous Field Studies Map
Nonfuel mineral resources in the United States-Mexico border region; a progress report on information available from the Center for Inter-American Mineral Resource Investigations (CIMRI) The exploitation of minerals has played a significant role in population growth and development of the U.S.Mexico border region. Recent proposed changes in regulations related to mining in the United States and changes in mining and investment regulations in Mexico have led to increased mineral exploration and development in Mexico, especially in the border region. As a preliminary step in the study of the mineral industry of this area, the Center for Inter-American Mineral Resource Investigations (CIMRI) of the U.S. Geological Survey has compiled mine and occurrence data for nonfuel minerals in the border region. Analysis of this information indicates that a wide variety of metallic and industrial mineral commodities... Categories: Publication; Types: Citation; Tags: Circular
WILD ROGUE WILDERNESS, OREGON. A geologic, geochemical, and geophysical investigation and a survey of mines, prospects, and quarries were conducted to evaluate the mineral-resource potential of the Wild Rogue Wilderness, Oregon. Approximately 800 mining claims, one-third of which are placer gold locations, exist in or adjacent to the area. The Wild Rogue Wilderness has one area of probable resource for copper, lead, zinc, silver, and gold and two area of probable resource potential for gold. Categories: Publication; Types: Citation; Tags: Geological Survey Professional Paper (United States)
Introduction to pathways of metal transfer from mineralized sources to biorecptors Since 1995, the Mineral Resources Program of the U.S. Geological Survey has funded a number of studies in the western United States that address environmental issues associated with mineral deposits. Categories: Publication; Types: Citation; Tags: Bulletin

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