Floyd Gray
Floyd Gray is a Scientist Emeritus with the USGS Geology, Minerals, Energy, and Geophysics Science Center in Tucson, AZ. Floyd's work with the USGS has included regional geologic studies, metallogenic studies, mineral-resource assessments, and mineral-environmental studies.
As a mineral resource specialist in the MRP, he studies the genesis and geologic setting of early magmatic and hydrothermal ore deposits and conducts assessments for undiscovered mineral resources in the Southwestern US, northern Mexico, Central America and the Caribbean basin. He is the project chief of the USGS Puerto Rico, U.S. Virgin Islands and Adjacent Areas of the Greater Antilles Quantitative Mineral Resource Assessment project. His recent research efforts have been in the area of flood hazard early warning systems, hydrogeologic framework studies, aqueous and environmental geochemistry, soil geochemistry, and limnology focusing on mineral-related environmental/ecological vulnerabilities resulting from dispersal of metal contaminants from abandoned and newly developing mine lands. Part of the long-term focus has been to understand the physical and biogeochemical processes that control the distribution, transport, and fate of trace elements in aquatic systems.
Education and Certifications
M.S. Geology, University of Massachusetts, Amherst, 1982
B.A. Earth Science, Anthropology, University of California, Santa Cruz, 1976
Honors and Awards
Inaugural Rufus D. Catchings Diversity Award, 2021
Science and Products
Mineral resources of the Warm Springs Wilderness Study Area, Mohave County, Arizona
Mineral resources of the Eagletail Mountains Wilderness Study Area, La Paz, Maricopa, and Yuma counties, Arizona
Mineral resources of the Signal Mountain Wilderness Study Area, Maricopa County, Arizona
Mineral resources of the Arrastra Mountain/Peoples Canyon Wilderness Study Area, La Paz, Mohave, and Yavapai counties, Arizona
Abstracts of the symposium of the Geology and mineral deposits of the Ajo and Lukeville 1 degree x 2 degrees Quadrangle, Arizona
Geologic map of the Ajo and Lukeville 1° by 2° quadrangle, southwest Arizona
Mineral resources of the Big Horn Mountains Wilderness Study Area, Maricopa County, Arizona
Mineral resources of the Lower Burro Creek Wilderness Study Area, Mohave and Yavapai counties, Arizona
Mineral Resources of the Warm Springs Wilderness Study Area, Mohave County, Arizona
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
Reconnaissance geologic map and aeromagnetic map of the Hat Mountain Quadrangle, Maricopa County, Arizona
Platinum in soils and rocks from the Lower Coon Mountain Pluton, Del Norte County, California
Science and Products
- Science
- Data
- Maps
Filter Total Items: 18
- Publications
Filter Total Items: 58
Mineral resources of the Warm Springs Wilderness Study Area, Mohave County, Arizona
No abstract available.AuthorsFloyd Gray, Robert C. Jachens, Robert J. Miller, Robert L. Turner, Daniel H. Knepper, James A. Pitkin, William J. Keith, John Mariano, Stephanie L. Jones, Stanley L. KorzebMineral resources of the Eagletail Mountains Wilderness Study Area, La Paz, Maricopa, and Yuma counties, Arizona
No abstract available.AuthorsRobert J. Miller, Floyd Gray, J. R. Hassemer, W. F. Hanna, J. A. Pitkin, Michelle I. Hornberger, S.L. Jones, M. E. LaneMineral resources of the Signal Mountain Wilderness Study Area, Maricopa County, Arizona
No abstract available.AuthorsFloyd Gray, R. J. Miller, J. R. Hassemer, D.H. Knepper, J. A. Pitkin, W. F. Hanna, T. J. KreidlerMineral resources of the Arrastra Mountain/Peoples Canyon Wilderness Study Area, La Paz, Mohave, and Yavapai counties, Arizona
No abstract available.AuthorsFloyd Gray, R. J. Miller, J. A. Pitkin, W.C. Bagby, J. R. Hassemer, J. H. McCarthy, W. F. Hanna, M. L. Conant Callas, M. E. LaneAbstracts of the symposium of the Geology and mineral deposits of the Ajo and Lukeville 1 degree x 2 degrees Quadrangle, Arizona
No abstract available.AuthorsFloyd GrayGeologic map of the Ajo and Lukeville 1° by 2° quadrangle, southwest Arizona
No abstract available.AuthorsFloyd Gray, R. J. Miller, M. J. Grubensky, R. M. Tosdal, G. B. Haxel, D. W. Peterson, D. J. May, L. T. SilverMineral resources of the Big Horn Mountains Wilderness Study Area, Maricopa County, Arizona
No abstract available.AuthorsFloyd Gray, R. J. Miller, J. R. Hassemer, W. F. Hanna, J.C. Brice, R.A. SchreinerMineral resources of the Lower Burro Creek Wilderness Study Area, Mohave and Yavapai counties, Arizona
No abstract available.AuthorsRobert J. Miller, Floyd Gray, J. R. Hassemer, W. F. Hanna, John Brice, Russell SchreinerMineral Resources of the Warm Springs Wilderness Study Area, Mohave County, Arizona
At the request of the U.S. Bureau of Land Management, approximately 113,500 acres of the Warm Springs Wilderness Study Area (AZ-020-028/029) were evaluated for mineral resources and mineral resource potential. In this report, the area studied is referred to as the 'wilderness study area' or 'study area'; any reference to the Warm Springs Wilderness Study Area refers only to that part of the wilderAuthorsFloyd Gray, Robert C. Jachens, Robert J. Miller, Robert L. Turner, Daniel H. Knepper, James A. Pitkin, William J. Keith, John Mariano, Stephanie L. Jones, Stanley L. KorzebAnalytical 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
No abstract available.AuthorsR. J. Miller, Floyd Gray, J. R. Hassemer, D. E. Detra, Paul H. Briggs, J. C. BriceReconnaissance geologic map and aeromagnetic map of the Hat Mountain Quadrangle, Maricopa County, Arizona
No abstract available.AuthorsFloyd Gray, R. J. Miller, Lottie SollPlatinum in soils and rocks from the Lower Coon Mountain Pluton, Del Norte County, California
No abstract available.AuthorsNorman J. Page, Floyd Gray