Denver Microbeam Laboratory

Publications

Filter Total Items: 63
Publication Thumbnail
Year Published: 2009

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...

Bern, A.M.; Lowers, H.A.; Meeker, G.P.; Rosati, J.A.
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; 2009; Article; Journal; Environmental Science and Technology; Bern, A. M.; Lowers, H. A.; Meeker, G. P.; Rosati, J. A.

Publication Thumbnail
Year Published: 2008

Understanding Contaminants Associated with Mineral Deposits

Interdisciplinary studies by the U.S. Geological Survey (USGS) have resulted in substantial progress in understanding the processes that control *the release of metals and acidic water from inactive mines and mineralized areas, *the transport of metals and acidic water to streams, and *the fate and effect of metals and acidity on downstream...

Verplanck, Philip L.
Understanding Contaminants Associated with Mineral Deposits; 2008; CIR; 1328; Edited by Verplanck, Philip L.

Publication Thumbnail
Year Published: 2008

Leachate Geochemical Results for Ash and Burned Soil Samples from the October 2007 Southern California Wildfires

This report is the second release of leachate geochemical data included as part of a multidisciplinary study of ash and burned soil samples from the October 2007 wildfires in southern California. Geochemical data for the first set of samples were released in an Open-File Report (Plumlee and others, 2007). This study is a continuation of that work...

Hageman, Philip L.; Plumlee, Geoffrey S.; Martin, Deborah A.; Hoefen, Todd M.; Meeker, Gregory P.; Adams, Monique; Lamothe, Paul J.; Anthony, Michael W.
Leachate Geochemical Results for Ash and Burned Soil Samples from the October 2007 Southern California Wildfires; 2008; OFR; 2008-1139; Hageman, Philip L.; Plumlee, Geoffrey S.; Martin, Deborah A.; Hoefen, Todd M.; Meeker, Gregory P.; Adams, Monique; Lamothe, Paul J.; Anthony, Michael W.

Publication Thumbnail
Year Published: 2008

Chemistry, mineralogy, and petrology of amphibole in Mount St. Helens 2004-2006 dacite

Textural, compositional, and mineralogical data are reported and interpreted for a large population of clinoamphibole phenocrysts in 22 samples from the seven successive dacite spines erupted at Mount St. Helens between October 2004 and January 2006. Despite the uniformity in bulk composition of magma erupted since 2004, there is striking...

Sherrod, David R.; Scott, William E.; Stauffer, Peter H.; Thornber, Carl R.; Pallister, John S.; Lowers, Heather; Rowe, Michael C.; Mandeville, Charles W.; Meeker, Gregory P.
Chemistry, mineralogy, and petrology of amphibole in Mount St. Helens 2004-2006 dacite: Chapter 32 in A volcano rekindled: the renewed eruption of Mount St. Helens, 2004-2006; 2008; PP; 1750-32; A volcano rekindled: the renewed eruption of Mount St. Helens, 2004-2006 (Professional Paper 1750); Thornber, Carl R.; Pallister, John S.; Lowers, Heather A.; Rowe, Michael C.; Mandeville, Charles W.; Meeker, Gregory P.

Publication Thumbnail
Year Published: 2008

Petrology of the 2004-2006 Mount St. Helens lava dome -- implications for magmatic plumbing and eruption triggering

Eighteen years after dome-forming eruptions ended in 1986, and with little warning, Mount St. Helens began to erupt again in October 2004. During the ensuing two years, the volcano extruded more than 80×106 m3 of gas-poor, crystal-rich dacite lava. The 2004-6 dacite is remarkably uniform in bulk-rock composition and, at 65 percent SiO2 ,...

Sherrod, David R.; Scott, William E.; Stauffer, Peter H.; Pallister, John S.; Thornber, Carl R.; Cashman, Katharine V.; Clynne, Michael A.; Lowers, Heather; Mandeville, Charles W.; Brownfield, Isabelle K.; Meeker, Gregory P.
Petrology of the 2004-2006 Mount St. Helens lava dome -- implications for magmatic plumbing and eruption triggering: Chapter 30 in A volcano rekindled: the renewed eruption of Mount St. Helens, 2004-2006; 2008; PP; 1750-30; A volcano rekindled: the renewed eruption of Mount St. Helens, 2004-2006 (Professional Paper 1750); Pallister, John S.; Thornber, Carl R.; Cashman, Katharine V.; Clynne, Michael A; Lowers, Heather A.; Mandeville, Charles W.; Brownfield, Isabelle K.; Meeker, Gregory P.

Publication Thumbnail
Year Published: 2007

Preliminary analytical results for ash and burned soils from the October 2007 southern California wildfires

The U.S. Geological Survey (USGS) collected ash and burned soils from about 28 sites in southern California wildfire areas (Harris, Witch, Ammo, Santiago, Canyon and Grass Valley) from Nov. 2 through 9, 2007 (table 1). USGS researchers are applying a wide variety of analytical methods to these samples, with the goal of helping identify...

Plumlee, Geoffrey S.; Martin, Deborah A.; Hoefen, Todd; Kokaly, Raymond F.; Hageman, Philip; Eckberg, Alison; Meeker, Gregory P.; Adams, Monique; Anthony, Michael; Lamothe, Paul J.
Preliminary Analytical Results for Ash and Burned Soils from the October 2007 Southern California Wildfires; 2007; OFR; 2007-1407; Plumlee, Geoffrey S.; Martin, Deborah A.; Hoefen, Todd; Kokaly, Raymond; Hageman, Philip; Eckberg, Alison; Meeker, Gregory P.; Adams, Monique; Anthony, Michael; Lamothe, Paul J.

Publication Thumbnail
Year Published: 2007

Compositional Data for Bengal Delta Sediment Collected from a Borehole at Rajoir, Bangladesh

Processes active within sediment of the Bengal basin have attracted world concern because of the locally high content of arsenic dissolved in ground water drawn from that sediment. Sediment samples were collected from a borehole in the town of Rajoir, Rajoir upazila, Madaripur district, Bangladesh, to investigate the processes contributing to...

Breit, George N.; Yount, James C.; Uddin, Md. Nehal; Muneem, Ad. Atual; Lowers, Heather; Berry, Cyrus J.; Whitney, John W.
Compositional Data for Bengal Delta Sediment Collected from a Borehole at Rajoir, Bangladesh; 2007; OFR; 2007-1022; Breit, George N.; Yount, James C.; Uddin, Md. Nehal; Muneem, Ad. Atual; Lowers, Heather A.; Berry, Cyrus J.; Whitney, John W.

Publication Thumbnail
Year Published: 2007

Characterization of flood sediments from Hurricanes Katrina and Rita and potential implications for human health and the environment

The flooding in the greater New Orleans, La., area that resulted from Hurricanes Katrina and Rita in August and September 2005 left behind accumulations of sediments up to many centimeters thick on streets, lawns, parking lots, and other flat surfaces (fig. 1). During the flood dewatering and subsequent cleanup, there were concerns that these...

Plumlee, Geoffrey S.; Foreman, William T.; Griffin, Dale W.; Lovelace, John K.; Meeker, Gregory P.; Demas, Charles R.
Characterization of flood sediments from Hurricanes Katrina and Rita and potential implications for human health and the environment: Chapter 7I in Science and the storms-the USGS response to the hurricanes of 2005; 2007; CIR; 1306-7I; Science and the storms-the USGS response to the hurricanes of 2005 (Circular 1306); Plumlee, Geoffrey S.; Foreman, William T.; Griffin, Dale W.; Lovelace, John K.; Meeker, Gregory P.; Demas, Charles R.

Publication Thumbnail
Year Published: 2006

Mineralogy and Morphology of Amphiboles Observed in Soils and Rocks in El Dorado Hills, California

From the Executive Summary: At the request of the U.S. Environmental Protection Agency (USEPA), the U.S. Geological Survey (USGS) has conducted an independent study of amphiboles in rocks and soils in the El Dorado Hills, California, area. The purpose of this study is to investigate specific issues regarding the presence of 'naturally occurring...

Meeker, G.P.; Lowers, H.A.; Swayze, G.A.; Van Gosen, B. S.; Sutley, S.J.; Brownfield, I.K.
Mineralogy and Morphology of Amphiboles Observed in Soils and Rocks in El Dorado Hills, California; 2006; OFR; 2006-1362; Meeker, G. P.; Lowers, H. A.; Swayze, G. A.; Van Gosen, B. S.; Sutley, S. J.; Brownfield, I. K.

Publication Thumbnail
Year Published: 2006

USGS environmental characterization of flood sediments left in the New Orleans area after Hurricanes Katrina and Rita, 2005--Progress Report

Introduction: The flooding in the greater New Orleans area that resulted from Hurricanes Katrina and Rita in September, 2005, left behind accumulations of sediments up to many centimeters thick on streets, lawns, parking lots, and other flat surfaces. These flood sediment deposits have been the focus of extensive study by the US Environmental...

Plumlee, Geoffrey S.; Meeker, Gregory P.; Lovelace, John K.; Rosenbauer, Robert J.; Lamothe, Paul J.; Furlong, Edward T.; Demas, Charles R.
USGS environmental characterization of flood sediments left in the New Orleans area after Hurricanes Katrina and Rita, 2005--Progress Report; 2006; OFR; 2006-1023; Plumlee, Geoffrey S.; Meeker, Gregory P.; Lovelace, John K.; Rosenbauer, Robert J.; Lamothe, Paul J.; Furlong, Edward T.; Demas, Charles R.

Publication Thumbnail
Year Published: 2006

Relationship between quartz trace elements and SEM-Cathodoluminescence textures revealed using WDS mapping techniques

[No abstract available]

Lowers, H.A.; Rusk, B.G.
Relationship between quartz trace elements and SEM-Cathodoluminescence textures revealed using WDS mapping techniques; 2006; Conference Paper; Microscopy and Microanalysis; Lowers, H. A.; Rusk, B. G.

Publication Thumbnail
Year Published: 2005

Questa baseline and pre-mining ground-water quality invistigation. 13. Mineral microscopy and chemistry of mined and unmined porphyry molybdenum mineralization along the Red River, New Mexico: Implications for ground- and surface-water quality

This report is one in a series presenting results of an interdisciplinary U.S. Geological Survey (USGS) study of ground-water quality in the lower Red River watershed prior to open-pit and underground molybdenite mining at Molycorp's Questa mine. The stretch of the Red River watershed that extends from just upstream of the town of Red River to...

Plumlee, Geoff; Lowers, Heather; Ludington, Steve; Koenig, Alan; Briggs, Paul
Questa Baseline and Pre-Mining Ground-Water Quality Investigation. 13. Mineral Microscopy and Chemistry of Mined and Unmined Porphyry Molybdenum Mineralization Along the Red River, New Mexico: Implications for Ground- and Surface-Water Quality; 2005; OFR; 2005-1442; Plumlee, Geoff; Lowers, Heather; Ludington, Steve; Koenig, Alan; Briggs, Paul