Publications
Filter Total Items: 87
The dispersion of fibrous amphiboles by glacial processes in the area surrounding Libby, Montana, USA The dispersion of fibrous amphiboles by glacial processes in the area surrounding Libby, Montana, USA
Mining operations began at a world-class vermiculite deposit at Vermiculite Mountain near Libby, Montana, circa 1920 and ended in 1990. Fibrous and asbestiform amphiboles intergrown with vermiculite ore are suspected to be a causative factor in an abnormally high number of cases of respiratory diseases in former mine and mill workers, and in residents of Libby. The question addressed in...
Authors
William Langer, Bradley Van Gosen, Gregory Meeker, David Adams, Todd Hoefen
Chemical and morphological comparison of erionite from Oregon, North Dakota, and Turkey Chemical and morphological comparison of erionite from Oregon, North Dakota, and Turkey
Erionite, a fibrous zeolite, occurs in pediment gravel deposits near Killdeer Mountain, North Dakota. Material from these pediment deposits has been excavated for use as roadbed throughout Dunn County, North Dakota. Erionite also occurs in the Cappadocian region of Turkey, where a link between malignant mesothelioma and inhalation of this mineral has been established. The U.S...
Authors
Heather Lowers, David Adams, Gregory Meeker, Constance Nutt
Estimated minimum discharge rates of the Deepwater Horizon spill— Interim report to the flow rate technical group from the Mass Balance Team Estimated minimum discharge rates of the Deepwater Horizon spill— Interim report to the flow rate technical group from the Mass Balance Team
All of the calculations and results in this report are preliminary and intended for the purpose, and only for the purpose, of aiding the incident team in assessing the extent of the spilled oil for ongoing response efforts. Other applications of this report are not authorized and are not considered valid. Because of time constraints and limitations of data available to the experts, many...
Authors
Victor Labson, Roger Clark, Gregg Swayze, Todd Hoefen, Raymond F. Kokaly, K. Eric Livo, Michael Powers, Geoffrey Plumlee, Gregory Meeker
Petrology and hydrothermal alteration of Jurassic intrusive rocks associated with gold deposits in the Bald Mountain mining district, White Pine County, Nevada Petrology and hydrothermal alteration of Jurassic intrusive rocks associated with gold deposits in the Bald Mountain mining district, White Pine County, Nevada
No abstract available.
Authors
Edward du Bray, J. Nash, Gregory Meeker, David Adams, William Wright
Examination of Libby, Montana, Fill Material for Background Levels of Amphibole from the Rainy Creek Complex Using Scanning Electron Microscopy and X-Ray Microanalysis Examination of Libby, Montana, Fill Material for Background Levels of Amphibole from the Rainy Creek Complex Using Scanning Electron Microscopy and X-Ray Microanalysis
Natural background levels of Libby-type amphibole in the sediment of the Libby valley in Montana have not, up to this point, been determined. The purpose of this report is to provide the preliminary findings of a study designed by both the U.S. Geological Survey and the U.S. Environmental Protection Agency and performed by the U.S. Geological Survey. The study worked to constrain the...
Authors
David Adams, William Langer, Todd Hoefen, Bradley Van Gosen, Gregory Meeker
In vitro studies evaluating leaching of mercury from mine waste calcine using simulated human body fluids 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...
Authors
John Gray, Geoffrey Plumlee, Suzette Morman, Pablo Higueras, James Crock, Heather A. Lowers, Mark Witten
Response to the comment by Henry Kahn and Dennis Santella on a summary of the development of a signature for detection of residual dust from the collapse of the World Trade Center buildings Response to the comment by Henry Kahn and Dennis Santella on a summary of the development of a signature for detection of residual dust from the collapse of the World Trade Center buildings
A response by Gregory P. Meeker and colleagues to a commentary on their article on the development of a signature for detection of residual dust from the collapse of the World Trade Center buildings is presented
Authors
Gregory Meeker, Heather Lowers, Paul Lioy, Morton Lippmann
Particle Size Characterization of Water-Elutriated Libby Amphibole 2000 and RTI International Amosite Particle Size Characterization of Water-Elutriated Libby Amphibole 2000 and RTI International Amosite
This report presents data on particle characterization analyzed by scanning electron microscopy on Libby amphibole collected by the U.S. Geological Survey in 2000 (LA2000) and amosite material collected by RTI International (RTI amosite). The particle characterization data were generated to support a portion of the Libby Action Plan. Prior to analysis, the raw LA2000 and RTI amosite...
Authors
Heather Lowers, Amy Bern
Materials characterization of dusts generated by the collapse of the World Trade Center Materials 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...
Authors
Gregory Meeker, Stephen Sutley, Isabelle Brownfield, Heather Lowers, Amy Bern, Gregg Swayze, Todd Hoefen, Geoffrey Plumlee, Roger Clark, Carol Gent
Inorganic chemical composition and chemical reactivity of settled dust generated by the World Trade Center building collapse Inorganic 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...
Authors
Geoffrey Plumlee, Philip Hageman, Paul Lamothe, Thomas Ziegler, Gregory Meeker, Peter Theodorakos, Isabelle Brownfield, Monique G. Adams, Gregg Swayze, Todd Hoefen, Joseph E. Taggart, Roger Clark, S. Wilson, Stephen Sutley
Environmental mapping of the World Trade Center area with imaging spectroscopy after the September 11, 2001 attack Environmental 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...
Authors
Roger Clark, Gregg Swayze, Todd Hoefen, Robert O. Green, Keith Livo, Gregory Meeker, Stephen Sutley, Geoffrey Plumlee, Betina Pavri, Charles Sarture, Joe Boardman, Isabelle Brownfield, Laurie Morath
Method development for analysis of urban dust using scanning electron microscopy with energy dispersive x-ray spectrometry to detect the possible presence of world trade center dust constituents Method development for analysis of urban dust using scanning electron microscopy with energy dispersive x-ray spectrometry to detect the possible presence of world trade center dust constituents
The collapse of the World Trade Center Towers on September 11, 2001, sent dust and debris across much of Manhattan and in the surrounding areas. Indoor and outdoor dust samples were collected and characterized by U.S. Geological Survey (USGS) scientists using scanning electron microscopy with energy-dispersive spectrometry (SEM/EDS). From this characterization, the U.S. Environmental...
Authors
A.M. Bern, H.A. Lowers, G.P. Meeker, J.A. Rosati