Geoffrey Plumlee, Ph.D.
As the USGS Chief Scientist, Geoff provides strategic scientific vision and counsel to the Director and the USGS Executive Leadership Team on inter- and trans-disciplinary USGS science research priorities, opportunities, activities, capabilities, and partnerships, particularly those cross multiple Mission Areas and Regions.
Geoff serves as a USGS executive science liaison with the Department of the Interior (DOI) and other Federal agencies, and is the USGS/DOI principal or representative on various Federal interagency coordination bodies such as the NSTC Subcommittee on Global Change Research and the NSTC Joint Subcommittee on Environment, Innovation and Public Health.
Executive Biography
As Chief Scientist of the U.S. Geological Survey (USGS), Dr. Geoff Plumlee provides strategic scientific vision and counsel to the USGS Director and Executive Leadership Team on inter- and transdisciplinary USGS science research priorities, opportunities, activities, capabilities, and partnerships, particularly those that cross multiple USGS Mission Areas and Regions. He serves as an executive science liaison for the USGS with the Department of the Interior (DOI) and other Federal agencies and is the USGS/DOI principal or representative on various Federal interagency committees such as the Subcommittee on Global Change Research and the NSTC Joint Subcommittee on Environment, Innovation and Public Health. As reflected in his role as a USGS executive champion or co-champion of two USGS Employee Resource Groups, Geoff is committed to promoting a diverse and inclusive USGS workforce, and to enhancing USGS use-inspired science that better meets the needs of underrepresented and disadvantaged communities.
Geoff has been USGS Chief Scientist and Senior Science Advisor to the USGS Director since January 2019. From May 2016 to early 2020, Geoff was the USGS Associate Director for Environmental Health, where he led USGS research at the intersection of the environment and health.
Geoff brought to these executive leadership positions 33 years of research and science leadership experience with the USGS, as well as his ability to seek out and establish successful research collaborations with scientists from a broad range of earth, biological, health, social, emergency response, and engineering science disciplines. From 1983 through May 2016, Geoff helped lead and carry out many research projects on linkages between mineral resources, the environment, disasters, and human health.
Geoff is a Fellow of the Geological Society of America (GSA), Past Chair of the GSA Geology and Health Division, a leader in the founding of the American Geophysical Union’s (AGU) GeoHealth Section, past AGU Council Member, and past adjunct clinical assistant professor at the University of Colorado School of Public Health. He is author or coauthor of more than 140 scientific publications, including many in journals across a wide range of scientific disciplines. Geoff has received the Department of the Interior Superior and Meritorious Service awards, the inaugural AGU GeoHealth Section Award, the GSA Geology and Health Division Distinguished Service Award, and the Society of Economic Geologists Waldemar Lindgren (Early Career Scientist) Award.
Education and Certifications
Doctorate in Geochemistry from Harvard University, 1989
Bachelor’s of Science in Geology from the University of New Mexico, 1980
Abstracts and Presentations
Geoff’s key publications are listed under the publications tab below. PDF’s of specific publications, as well as a complete list of Geoff’s more than 140 publications, are available upon request.
Science and Products
In vitro studies evaluating leaching of mercury from mine waste calcine using simulated human body fluids
Report from Ground Zero: How geoscientists aid in the aftermath of environmental disasters
Climax-Type Porphyry Molybdenum Deposits
Questa Baseline and Pre-mining Ground-Water Quality Investigation, 7. A Pictorial Record of Chemical Weathering, Erosional Processes, and Potential Debris-flow Hazards in Scar Areas Developed on Hydrothermally Altered Rocks
Sample collection of ash and burned soils from the October 2007 southern California Wildfires
Environmental mapping of the World Trade Center area with imaging spectroscopy after the September 11, 2001 attack
Materials characterization of dusts generated by the collapse of the World Trade Center
Inorganic chemical composition and chemical reactivity of settled dust generated by the World Trade Center building collapse
Application of in vitro extraction studies to evaluate element bioaccessibility in soils from a transect across the United States and Canada
Speciation Methods Used to Assess Potential Health Effects of Toxic Metals in Environmental Materials
Release of Hexavalent Chromium by Ash and Soils in Wildfire-Impacted Areas
Preliminary analytical results for a mud sample collected from the LUSI Mud Volcano, Sidoarjo, East Java, Indonesia
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In vitro studies evaluating leaching of mercury from mine waste calcine using simulated human body fluids
In vitro bioaccessibility (IVBA) studies were carried out on samples of mercury (Hg) mine-waste calcine (roasted Hg ore) by leaching with simulated human body fluids. The objective was to estimate potential human exposure to Hg due to inhalation of airborne calcine particulates and hand-to-mouth ingestion of Hg-bearing calcines. Mine waste calcines collected from Hg mines at Almadén, Spain, and TeAuthorsJohn E. Gray, Geoffrey S. Plumlee, Suzette A. Morman, Pablo L. Higueras, James G. Crock, Heather A. Lowers, Mark L. WittenReport from Ground Zero: How geoscientists aid in the aftermath of environmental disasters
People around the world remember when they first learned of the attacks on New York City’s World Trade Center towers on Sept. 11, 2001. For me, the memories are vivid — my feelings of shock, horror and sadness were similarly etched on the faces of all the attendees of a mining and the environment workshop in Buenos Aires, Argentina, where I was speaking. At that time, I had no idea that our smallAuthorsGeoffrey S. PlumleeClimax-Type Porphyry Molybdenum Deposits
Climax-type porphyry molybdenum deposits, as defined here, are extremely rare; thirteen deposits are known, all in western North America and ranging in age from Late Cretaceous to mainly Tertiary. They are consistently found in a postsubduction, extensional tectonic setting and are invariably associated with A-type granites that formed after peak activity of a magmatic cycle. The deposits consistAuthorsSteve Ludington, Geoffrey S. PlumleeQuesta Baseline and Pre-mining Ground-Water Quality Investigation, 7. A Pictorial Record of Chemical Weathering, Erosional Processes, and Potential Debris-flow Hazards in Scar Areas Developed on Hydrothermally Altered Rocks
Erosional scar areas developed along the lower Red River basin, New Mexico, reveal a complex natural history of mineralizing processes, rapid chemical weathering, and intense physical erosion during periodic outbursts of destructive, storm-induced runoff events. The scar areas are prominent erosional features with craggy headwalls and steep, denuded slopes. The largest scar areas, including, fAuthorsGeoffrey S. Plumlee, Steve Ludington, Kirk R. Vincent, Philip L. Verplanck, Jonathan S. Caine, K. Eric LivoSample collection of ash and burned soils from the October 2007 southern California Wildfires
Between November 2 through 9, 2007 scientists from the U.S. Geological Survey (USGS) collected samples of ash and burned soils from 28 sites in six areas burned as a result of the Southern California wildfires of October 2007, including the Harris, Witch, Santiago, Ammo, Canyon, and Grass Valley Fires. The primary goal of this sampling and analysis effort was to understand how differences in ash aAuthorsTodd M. Hoefen, Raymond F. Kokaly, Deborah A. Martin, Carlton J. Rochester, Geoffrey S. Plumlee, Greg Mendez, Eric G. Reichard, Robert N. FisherEnvironmental mapping of the World Trade Center area with imaging spectroscopy after the September 11, 2001 attack
The Airborne Visible/Infrared Imaging Spectrometer (AVIRIS) was flown over the World Trade Center area on September 16, 18, 22, and 23, 2001. The data were used to map the WTC debris plume and its contents, including the spectral signatures of asbestiform minerals. Samples were collected and used as ground truth for the AVARIS mapping. A number of thermal hot spots were observed with temperaturesAuthorsRoger N. Clark, Gregg A. Swayze, Todd M. Hoefen, Robert O. Green, Keith E. Livo, Gregory P. Meeker, Stephen J. Sutley, Geoffrey S. Plumlee, Betina Pavri, Charles M. Sarture, Joe Boardman, Isabelle Brownfield, Laurie C. MorathMaterials characterization of dusts generated by the collapse of the World Trade Center
The major inorganic components of the dusts generated from the collapse of the World Trade Center buildings on September 11, 2001 were concrete materials, gypsum, and man-made vitreous fibers. These components were likely derived from lightweight Portland cement concrete floors, gypsum wallboard, and spray-on fireproofing and ceiling tiles, respectively. All of the 36 samples collected by the USGSAuthorsGregory P. Meeker, Stephen J. Sutley, Isabelle Brownfield, Heather Lowers, Amy M. Bern, Gregg A. Swayze, Todd M. Hoefen, Geoffrey S. Plumlee, Roger N. Clark, Carol A. GentInorganic chemical composition and chemical reactivity of settled dust generated by the World Trade Center building collapse
Samples of dust deposited around lower Manhattan by the September 11, 2001, World Trade Center (WTC) collapse have inorganic chemical compositions that result in part from the variable chemical contributions of concrete, gypsum wallboard, glass fibers, window glass, and other materials contained in the buildings. The dust deposits were also modified chemically by variable interactions with rain waAuthorsGeoffrey S. Plumlee, Philip L. Hageman, Paul J. Lamothe, Thomas L. Ziegler, Gregory P. Meeker, Peter M. Theodorakos, Isabelle Brownfield, Monique G. Adams, Gregg A. Swayze, Todd M. Hoefen, Joseph E. Taggart, Roger N. Clark, S. Wilson, Stephen J. SutleyApplication of in vitro extraction studies to evaluate element bioaccessibility in soils from a transect across the United States and Canada
In vitro bioaccessibility tests (IVBA) are inexpensive, physiologically-based extraction tests designed to estimate the bioaccessibility of elements along ingestion exposure pathways. Published IVBA protocols call for the testing to be done on theAuthorsS.A. Morman, G.S. Plumlee, D. B. SmithSpeciation Methods Used to Assess Potential Health Effects of Toxic Metals in Environmental Materials
Assessing potential exposures to toxic metals or metalloids such as arsenic and chromium in environmental materials is important in protecting public health. The chemical form of an element in, or released from, a material is also important, since some forms, such as Cr(VI), are more toxic than others, for example, Cr(III). We have used a variety of procedures to assess potential exposures to hexaAuthorsRuth E. Wolf, Suzette A. Morman, Geoffrey S. PlumleeRelease of Hexavalent Chromium by Ash and Soils in Wildfire-Impacted Areas
The highly oxidizing environment of a wildfire has the potential to convert any chromium present in the soil or in residential or industrial debris to its more toxic form, hexavalent chromium, a known carcinogen. In addition, the highly basic conditions resulting from the combustion of wood and wood products could result in the stabilization of any aqueous hexavalent chromium formed. Samples weAuthorsRuth E. Wolf, Suzette A. Morman, Geoffrey S. Plumlee, Philip L. Hageman, Monique AdamsPreliminary analytical results for a mud sample collected from the LUSI Mud Volcano, Sidoarjo, East Java, Indonesia
On May 29, 2006, mud and gases began erupting unexpectedly from a vent 150 meters away from a hydrocarbon exploration well near Sidoarjo, East Java, Indonesia. The eruption, called the LUSI (Lumpur 'mud'-Sidoarjo) mud volcano, has continued since then at rates as high as 160,000 m3 per day. At the request of the United States Department of State, the U.S. Geological Survey (USGS) has been providinAuthorsGeoffrey S. Plumlee, Thomas J. Casadevall, Handoko T. Wibowo, Robert J. Rosenbauer, Craig A. Johnson, George N. Breit, Heather Lowers, Ruth E. Wolf, Philip L. Hageman, Harland L. Goldstein, Michael W. Anthony, Cyrus J. Berry, David L. Fey, Gregory P. Meeker, Suzette A. Morman - News