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 resource assessment of the Ajo and Lukeville 1° by 2° quadrangles, Arizona
Geologic map of the Lower Coon Mountain Pluton, Del Norte County, California
NORTH FORK SMITH RIVER ROADLESS AREA, CALIFORNIA AND OREGON.
WILD ROGUE WILDERNESS, OREGON.
Preliminary geologic map of the Medford 1° x 2° quadrangle, Oregon and California
Geochemical analyses of rock and stream-sediment samples from the Wild Rogue Wilderness Area, Coos, Curry, and Douglas counties, Oregon
Geochemical analyses of rock and stream-sediment samples from the North Fork Smith River Roadless Area, Del Norte County, California, and Curry County, Oregon
Reconnaissance geologic map of parts of the Gold Hill, Ruch, Medford, and Talent 15' quadrangles, southwestern Oregon
Geology of the igneous complex of Tincup Peak, Kalmiopsis Wilderness Area, southwestern Oregon
Preliminary reconnaissance geologic map of the Glendale Quadrangle, Oregon
Science and Products
- Science
- Data
- Maps
Filter Total Items: 18
- Publications
Filter Total Items: 58
Mineral resource assessment of the Ajo and Lukeville 1° by 2° quadrangles, Arizona
No abstract available.AuthorsJ. A. Peterson, D. P. Cox, Floyd GrayGeologic map of the Lower Coon Mountain Pluton, Del Norte County, California
No abstract available.AuthorsFloyd Gray, Norman J. PageNORTH FORK SMITH RIVER ROADLESS AREA, CALIFORNIA AND OREGON.
Geologic, geochemical, and geophysical investigations and a survey of mines and prospects were conducted to evaluate the mineral-resource potential of the North Fork Smith River Roadless Area, California. The area has probable and sustantiated resource potential for nickel, chromium, copper, and mercury and approximately 2300 mining claims exist in or adjacent to the area. The geologic terrane preAuthorsFloyd Gray, Michael HamiltonWILD 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, silveAuthorsFloyd Gray, Michael S. MillerPreliminary geologic map of the Medford 1° x 2° quadrangle, Oregon and California
No abstract available.AuthorsJames G. Smith, N. J. Page, M. G. Johnson, B. C. Moring, Floyd GrayGeochemical analyses of rock and stream-sediment samples from the Wild Rogue Wilderness Area, Coos, Curry, and Douglas counties, Oregon
No abstract available.AuthorsFloyd Gray, J. A. PetersonGeochemical analyses of rock and stream-sediment samples from the North Fork Smith River Roadless Area, Del Norte County, California, and Curry County, Oregon
No abstract available.AuthorsFloyd Gray, J. Haffty, E.F. Cooley, N. J. PageReconnaissance geologic map of parts of the Gold Hill, Ruch, Medford, and Talent 15' quadrangles, southwestern Oregon
No abstract available.AuthorsWill N. Blair, Albert Wong, B. C. Moring, J. B. Barnard, N. J. Page, Floyd GrayGeology of the igneous complex of Tincup Peak, Kalmiopsis Wilderness Area, southwestern Oregon
No abstract available.AuthorsFloyd GrayPreliminary reconnaissance geologic map of the Glendale Quadrangle, Oregon
No abstract available.AuthorsNorman J. Page, M. G. Johnson, Barry Moring, W.N. Blair, Floyd Gray, J.K. Cannon