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Browse almost 5,000 conference papers authored by our scientists and refine search by topic, location, year, and advanced search.

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Analysis of the age and paleomagnetic orientation of the Broadwell Mesa Basalt, Bristol Mountains, CA Analysis of the age and paleomagnetic orientation of the Broadwell Mesa Basalt, Bristol Mountains, CA

To add to the regional paleomagnetic data documenting block rotation in eastern California, we determined the age and paleomagnetic rotation of the Broadwell Mesa basalt, a basalt in the Bristol Mountains, CA as part of an effort to constrain the timing and rotation of blocks adjacent to the fault. The east-striking sinistral Broadwell Mesa fault cuts and separates the basalt into two...
Authors
Geoffrey Phelps, John Hillhouse, Robert J. Fleck, David M. Miller, David C. Buesch, Andrew J. Cyr, Kevin M. Schmidt
By
Geology, Energy, and Minerals Mission Area, Energy Resources Program, Mineral Resources Program, National Laboratories Program, Science and Decisions Center, Geology, Minerals, Energy, and Geophysics Science Center

Spectral properties of anhydrous carbonates and nitrates Spectral properties of anhydrous carbonates and nitrates

No abstract available.
Authors
J.L. Bishop, S.J. King, M.D. Lane, B. Lafuente, A. J. Brown, T. Hiroi, Gregg A. Swayze, J.-F. Lin
By
Mineral Resources Program, Geology, Geophysics, and Geochemistry Science Center, Spectroscopy Lab

Using enteric pathogens to assess sources of fecal contamination in the Silurian Dolomite Aquifer: Preliminary results Using enteric pathogens to assess sources of fecal contamination in the Silurian Dolomite Aquifer: Preliminary results

The fractured Silurian dolomite aquifer is an important, but vulnerable, source of drinking water in northeast Wisconsin (Sherrill in Geology and ground water in Door County, Wisconsin, with emphasis on contamination potential in the Silurian dolomite, 1978; Bradbury and Muldoon in Hydrogeology and groundwater monitoring of fractured dolomite in the Upper Door Priority Watershed, Door...
Authors
Maureen A. Muldoon, Mark A. Borchardt, Susan K. Spencer, Randall J. Hunt, David W. Owens
By
Water Resources Mission Area, Upper Midwest Environmental Sciences Center, Upper Midwest Water Science Center

New method to integrate remotely sensed hydrothermal alteration mapping into quantitative mineral resource assessments New method to integrate remotely sensed hydrothermal alteration mapping into quantitative mineral resource assessments

Hydrothermal alteration data mapped using the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) were compiled into hydrothermal alteration polygons for use in an assessment of porphyry copper mineral resource potential in the southwestern United States. Hydrothermal alteration polygons along with geochemistry, gravity and magnetic, lithologic, and deposit and...
Authors
John C. Mars, Jane M. Hammarstrom, Gilpin R. Robinson, Stephen Ludington, Lukas Zurcher, Helen W. Folger, Mark E. Gettings, Federico Solano, Thomas Kress
By
Geology, Energy & Minerals Science Center

Effect of stocking and biotic and abiotic factors on Muskellunge recruitment in northern Wisconsin lakes Effect of stocking and biotic and abiotic factors on Muskellunge recruitment in northern Wisconsin lakes

The Muskellunge Esox masquinongy is an important recreational fish species in North America. Some populations of Muskellunge are in decline, despite a reduction in harvest by anglers due largely to a growing catch-and-release ethic. Our objectives were to determine if Muskellunge recruitment was influenced by stocking, biotic factors, and abiotic factors in northern Wisconsin lakes. To...
Authors
Todd S. Caspers, Michael J. Hansen, Steven W. Hewett
By
Ecosystems Mission Area, Great Lakes Science Center

Iron isotope systematics of shale-derived soils as potentially influenced by small mineral particle loss Iron isotope systematics of shale-derived soils as potentially influenced by small mineral particle loss

Loss of small mineral particles from soil has been suggested as a process that can produce net isotopic fractionation in the remaining soil. We extracted water dispersible colloids (WDCs) from bulk soil collected at the Susquehanna/Shale Hills Critical Zone Observatory (SSHO) and measured their Fe isotopic composition for comparison to published data from the site. The goal was to...
Authors
Carleton R. Bern, Tiffany Yesavage, Michael Pribil
By
Water Resources Mission Area, Colorado Water Science Center
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