William Ridley
Willian (Ian) Ridley is a Research Geologist with the Geology, Geophysics, and Geochemistry Science Center.
Professional Experience
Previous USGS Assignments
Staff Scientist, Central Colorado Project Staff Scientist, Integrated Studies of National Parks (Big Bend)
Section Chief, Branch of Exploration Geochemistry and Branch of GeochemistryConsultant Geochemist, Evergreen, CO
Geochemist, Geoexplorers International, Denver, CO
Exploration Manager, Beard Oil Company, Evergreen , CO
Research Specialist, Exxon Production Research Company, Houston, TX
Adjunct Professor, Columbia University, NY, NY
Anglo-American Visiting Professor of Geochemistry, University of Witswatersrand, Johanessburg, SA
Associate Professor, Columbia University, NY, NY
Adjunct Professor, Rutgers University, New Brunswick, NJ
Staff Scientist, Lunar and Planetary Institute, Houston, TX
National Research Council Associate, NASA-MSC, Houston, TX
Research Geologist, British Geological Survey, London, UK
Education and Certifications
Ph.D. (Geochemistry, Volcanology), Royal College of Science,Univ. of London 1968
Associate (Geochemistry), Royal School of Mines, Univ. of London 1968
B.Sc. (Geology/Chemistry), Royal College of Science, Univ. of London 1964
Affiliations and Memberships*
Adjunct Professor, Colorado School of Mines
Honors and Awards
Judd Research Prize, Imperial College, London University
NASA Distinguished Service Award
USGS Star Award
Ten NASA Research Grants
Seven NSF Research Grants
Four Miscellaneous Awards (EPRI, DOE, ONR)
Three USGS Venture Capital Awards
Abstracts and Presentations
141 abstract and extended abstracts
125 peer-reviewed papers
Science and Products
Filter Total Items: 38
Application of iron and zinc isotopes to track the sources and mechanisms of metal loading in a mountain watershed Application of iron and zinc isotopes to track the sources and mechanisms of metal loading in a mountain watershed
Here the hydrogeochemical constraints of a tracer dilution study are combined with Fe and Zn isotopic measurements to pinpoint metal loading sources and attenuation mechanisms in an alpine watershed impacted by acid mine drainage. In the tested mountain catchment, δ56Fe and δ66Zn isotopic signatures of filtered stream water samples varied by ∼3.5‰ and 0.4‰, respectively. The inherent...
Authors
D.M. Borrok, R. B. Wanty, Ridley W. Ian, P. J. Lamothe, B. A. Kimball, P. L. Verplanck, R.L. Runkel
Isotopic variations of dissolved copper and zinc in stream waters affected by historical mining Isotopic variations of dissolved copper and zinc in stream waters affected by historical mining
Zinc and Cu play important roles in the biogeochemistry of natural systems, and it is likely that these interactions result in mass-dependent fractionations of their stable isotopes. In this study, we examine the relative abundances of dissolved Zn and Cu isotopes in a variety of stream waters draining six historical mining districts located in the United States and Europe. Our goals...
Authors
David M. Borrok, David Nimick, Richard B. Wanty, William I. Ridley
Laser ablation ICP-MS in geochemistry and biogeochemistry: A progress report Laser ablation ICP-MS in geochemistry and biogeochemistry: A progress report
[No abstract available]
Authors
W.I. Ridley, A.E. Koenig, M.J. Pribil
Fractionation of Cu and Zn isotopes during adsorption onto amorphous Fe(III) oxyhydroxide: Experimental mixing of acid rock drainage and ambient river water Fractionation of Cu and Zn isotopes during adsorption onto amorphous Fe(III) oxyhydroxide: Experimental mixing of acid rock drainage and ambient river water
Fractionation of Cu and Zn isotopes during adsorption onto amorphous ferric oxyhydroxide is examined in experimental mixtures of metal-rich acid rock drainage and relatively pure river water and during batch adsorption experiments using synthetic ferrihydrite. A diverse set of Cu- and Zn-bearing solutions was examined, including natural waters, complex synthetic acid rock drainage, and...
Authors
Laurie S. Balistrieri, D.M. Borrok, R. B. Wanty, W.I. Ridley
Geochemical and sulfur-isotopic signatures of volcanogenic massive sulfide deposits on Prince of Wales Island and vicinity, southeastern Alaska Geochemical and sulfur-isotopic signatures of volcanogenic massive sulfide deposits on Prince of Wales Island and vicinity, southeastern Alaska
Stratabound volcanogenic massive sulfide (VMS) deposits on Prince of Wales Island and vicinity, southeastern Alaska, occur in two volcanosedimentary sequences of Late Proterozoic through Cambrian and of Ordovician through Early Silurian age. This study presents geochemical data on sulfide-rich samples, in situ laser-ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) of...
Authors
John F. Slack, Wayne C. Shanks, Susan M. Karl, Pamela A. Gemery, Peter E. Bittenbender, W. Ian Ridley
Separation of copper, iron, and zinc from complex aqueous solutions for isotopic measurement Separation of copper, iron, and zinc from complex aqueous solutions for isotopic measurement
The measurement of Cu, Fe, and Zn isotopes in natural samples may provide valuable information about biogeochemical processes in the environment. However, the widespread application of stable Cu, Fe, and Zn isotope chemistry to natural water systems remains limited by our ability to efficiently separate these trace elements from the greater concentrations of matrix elements. In this...
Authors
David M. Borrok, Richard B. Wanty, William I. Ridley, Ruth E. Wolf, Paul J. Lamothe, M. Adams
Science and Products
Filter Total Items: 38
Application of iron and zinc isotopes to track the sources and mechanisms of metal loading in a mountain watershed Application of iron and zinc isotopes to track the sources and mechanisms of metal loading in a mountain watershed
Here the hydrogeochemical constraints of a tracer dilution study are combined with Fe and Zn isotopic measurements to pinpoint metal loading sources and attenuation mechanisms in an alpine watershed impacted by acid mine drainage. In the tested mountain catchment, δ56Fe and δ66Zn isotopic signatures of filtered stream water samples varied by ∼3.5‰ and 0.4‰, respectively. The inherent...
Authors
D.M. Borrok, R. B. Wanty, Ridley W. Ian, P. J. Lamothe, B. A. Kimball, P. L. Verplanck, R.L. Runkel
Isotopic variations of dissolved copper and zinc in stream waters affected by historical mining Isotopic variations of dissolved copper and zinc in stream waters affected by historical mining
Zinc and Cu play important roles in the biogeochemistry of natural systems, and it is likely that these interactions result in mass-dependent fractionations of their stable isotopes. In this study, we examine the relative abundances of dissolved Zn and Cu isotopes in a variety of stream waters draining six historical mining districts located in the United States and Europe. Our goals...
Authors
David M. Borrok, David Nimick, Richard B. Wanty, William I. Ridley
Laser ablation ICP-MS in geochemistry and biogeochemistry: A progress report Laser ablation ICP-MS in geochemistry and biogeochemistry: A progress report
[No abstract available]
Authors
W.I. Ridley, A.E. Koenig, M.J. Pribil
Fractionation of Cu and Zn isotopes during adsorption onto amorphous Fe(III) oxyhydroxide: Experimental mixing of acid rock drainage and ambient river water Fractionation of Cu and Zn isotopes during adsorption onto amorphous Fe(III) oxyhydroxide: Experimental mixing of acid rock drainage and ambient river water
Fractionation of Cu and Zn isotopes during adsorption onto amorphous ferric oxyhydroxide is examined in experimental mixtures of metal-rich acid rock drainage and relatively pure river water and during batch adsorption experiments using synthetic ferrihydrite. A diverse set of Cu- and Zn-bearing solutions was examined, including natural waters, complex synthetic acid rock drainage, and...
Authors
Laurie S. Balistrieri, D.M. Borrok, R. B. Wanty, W.I. Ridley
Geochemical and sulfur-isotopic signatures of volcanogenic massive sulfide deposits on Prince of Wales Island and vicinity, southeastern Alaska Geochemical and sulfur-isotopic signatures of volcanogenic massive sulfide deposits on Prince of Wales Island and vicinity, southeastern Alaska
Stratabound volcanogenic massive sulfide (VMS) deposits on Prince of Wales Island and vicinity, southeastern Alaska, occur in two volcanosedimentary sequences of Late Proterozoic through Cambrian and of Ordovician through Early Silurian age. This study presents geochemical data on sulfide-rich samples, in situ laser-ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) of...
Authors
John F. Slack, Wayne C. Shanks, Susan M. Karl, Pamela A. Gemery, Peter E. Bittenbender, W. Ian Ridley
Separation of copper, iron, and zinc from complex aqueous solutions for isotopic measurement Separation of copper, iron, and zinc from complex aqueous solutions for isotopic measurement
The measurement of Cu, Fe, and Zn isotopes in natural samples may provide valuable information about biogeochemical processes in the environment. However, the widespread application of stable Cu, Fe, and Zn isotope chemistry to natural water systems remains limited by our ability to efficiently separate these trace elements from the greater concentrations of matrix elements. In this...
Authors
David M. Borrok, Richard B. Wanty, William I. Ridley, Ruth E. Wolf, Paul J. Lamothe, M. Adams
*Disclaimer: Listing outside positions with professional scientific organizations on this Staff Profile are for informational purposes only and do not constitute an endorsement of those professional scientific organizations or their activities by the USGS, Department of the Interior, or U.S. Government