Brian Marshall
Brian Marshall is a Scientist Emeritus with the Geology, Geophysics, and Geochemistry Science Center.
Professional Experience
USGS Yucca Mountain Project Branch, Geochemistry Team Chief (2007-2010): Leader of team of geochemists and hydrologists responsible for defining, executing, and reporting on research for a variety of projects both externally and internally funded.
USGS Yucca Mountain Project Branch, Research Hydrologist/Geologist (1999-2007): Chemical and isotopic composition of pore water, rocks and secondary minerals in a thick vadose zone that is the proposed site of a nuclear waste repository. Responsible for formulating the research tasks, writing operating procedures, and publishing results, often with colleagues working on the same project.
Abstracts and Presentations
Marshall, B.D. and Futa, K., 2003, Strontium in pore water from the Topopah Spring Tuff, Yucca Mountain, Nevada. Proceedings of the Tenth International High-Level Radioactive Waste Management Conference, Las Vegas, NV. American Nuclear Society, La Grange Park, IL, p. 373-376.
Marshall, B.D., Stuckless, J.S., Peterman, Z.E., and Whelan, J.F., 1993, Isotopic studies of cavity filling and fracture coating minerals as an aid to understanding paleohydrology, Yucca Mountain, Nevada, USA, in Paleohydrological Methods and their Applications, Proceedings of NEA-OECD Workshop held November 1992, p. 147.
Science and Products
Filter Total Items: 44
Strontium isotopes in carbonate deposits at Crater Flat, Nevada
Strontium isotope studies of carbonates from soils, veins, eolian dust and Paleozoic basement sampled near Crater Flat, southwest of Yucca Mountain, provide evidence for the origins of these materials. Vein and soil carbonates have nearly identical ranges of 87Sr/86Sr, and eolian material has 87Sr/86Sr ratios at the lower end of the pedogenic range. The average 87Sr/86Sr of Paleozoic...
Authors
B.D. Marshall, Kiyoto Futa, Z. E. Peterman, John S. Stuckless
Assessing the natural performance of felsic tuffs using the Rb-Sr and Sm-Nd systems-A study of the altered zone in the Topopah Spring Member, Paintbrush Tuff, Yucca Mountain, Nevada
Core samples of the Topopah Spring Member of the Paintbrush Tuff from drill hole UE25A#1 were analyzed for Sr and Nd isotopes and selected minor and trace elements to constrain the origin of a zcolitized zone associated with the lower vitrophyre. The Sm-Nd radiogenic isotope system was unperturbed by the alteration, but the Rb-Sr system was severely disturbed in the altered zone. The...
Authors
Zell E. Peterman, Richard W. Spengler, Kiyoto Futa, Brian D. Marshall
Origin of carbonate deposits in the vicinity of Yucca Mountain, Nevada. Preliminary results of strontium-isotope analyses
As part of the paleohydrology study of the Yucca Mountain Project, strontium-isotope analyses of carbonate deposits, ground water, and major rock reservoirs of strontium are in progress. This paper presents a summary of the strontium-isotope data obtained through 1989. Calcium carbonate is ubiquitous in the vicinity of Yucca Mountain, where it occurs as pedogenic horizons and rhizoliths...
Authors
B.D. Marshall, Kiyoto Futa, Shannon A. Mahan, Z. E. Peterman, John S. Stuckless, J. S. Downey, Edwin D. Gutentag
TexCon : a text file conversion utility for use with Apple Macintosh computers
No abstract available.
Authors
Brian D. Marshall
TexCon : a text file conversion utility for use with Apple Macintosh computers
No abstract available.
Authors
Brian D. Marshall
CONTROL; a solid-source mass spectrometer data acquisition program for use with Hewlett-Packard computers
No abstract available.
Authors
Brian D. Marshall
Rb-Sr, Sm-Nd, K-Ca, O, and H isotopic study of Cretaceous-Tertiary boundary sediments, Caravaca, Spain: evidence for an oceanic impact site
Isotopic ratios and trace element abundances were measured on samples of Ir-enriched clay at the Cretaceous-Tertiary boundary, and in carbonate and marl from 5 cm below and 3 cm above the boundary. Samples were leached with acetic acid to remove carbonate, and with hydrochloric acid. Leachates and residues were measured. The Sr, Nd, O and H isotopic compositions of the boundary clay...
Authors
D.J. DePaolo, F.T. Kyte, B.D. Marshall, J. R. O'Neil, J. Smit
Proceedings of the Symposium on Mineral Deposits of the Pacific Northwest: Geological Society of America, Cordilleran Section meeting at Corvallis, Oregon, March 20-21, 1980
Stratiform and volcanogenic zinc-lead-barium deposits occur within the pelagic Kagvik sequence in the Red Dog Creek and Drenchwater Creek areas in the DeLong Mountains and Howard Pass quadrangles. The sulfide deposits occur together with barite, tuff, sandstone, shale, chert, and keratophyre flows and sills. The three main occurrences of the stratiform zinc-lead-barium deposits in the...
Authors
Miles L. Silberman, C. W. Field, Anne L. Berry
Non-USGS Publications**
Marshall, Brian D. and DePaolo, Donald J., 1989, Calcium isotopes in igneous rocks and the origin of granite: Geochimica et Cosmochimica Acta, v. 53, p. 917-922, https://doi.org/10.1016/0016-7037(89)90036-7.
Marshall, B.D., Woodard, H.H., and DePaolo, D.J., 1986, K-Ca-Ar systematics of authigenic sanidine from Waukau, Wisconsin, and the diffusivity of argon: Geology, v. 14, p. 936-938, https://doi.org/10.1130/0091-7613(1986)14<936:KSOASF>2.0.CO;2.
.
.
Marshall, B.D. and DePaolo, D.J., 1982, Precise age determinations and petrogenetic studies using the K-Ca method: Geochimica et Cosmochimica Acta, v.46, p. 2537-2545, https://doi.org/10.1016/0016-7037(82)90376-3.
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
Science and Products
Filter Total Items: 44
Strontium isotopes in carbonate deposits at Crater Flat, Nevada
Strontium isotope studies of carbonates from soils, veins, eolian dust and Paleozoic basement sampled near Crater Flat, southwest of Yucca Mountain, provide evidence for the origins of these materials. Vein and soil carbonates have nearly identical ranges of 87Sr/86Sr, and eolian material has 87Sr/86Sr ratios at the lower end of the pedogenic range. The average 87Sr/86Sr of Paleozoic...
Authors
B.D. Marshall, Kiyoto Futa, Z. E. Peterman, John S. Stuckless
Assessing the natural performance of felsic tuffs using the Rb-Sr and Sm-Nd systems-A study of the altered zone in the Topopah Spring Member, Paintbrush Tuff, Yucca Mountain, Nevada
Core samples of the Topopah Spring Member of the Paintbrush Tuff from drill hole UE25A#1 were analyzed for Sr and Nd isotopes and selected minor and trace elements to constrain the origin of a zcolitized zone associated with the lower vitrophyre. The Sm-Nd radiogenic isotope system was unperturbed by the alteration, but the Rb-Sr system was severely disturbed in the altered zone. The...
Authors
Zell E. Peterman, Richard W. Spengler, Kiyoto Futa, Brian D. Marshall
Origin of carbonate deposits in the vicinity of Yucca Mountain, Nevada. Preliminary results of strontium-isotope analyses
As part of the paleohydrology study of the Yucca Mountain Project, strontium-isotope analyses of carbonate deposits, ground water, and major rock reservoirs of strontium are in progress. This paper presents a summary of the strontium-isotope data obtained through 1989. Calcium carbonate is ubiquitous in the vicinity of Yucca Mountain, where it occurs as pedogenic horizons and rhizoliths...
Authors
B.D. Marshall, Kiyoto Futa, Shannon A. Mahan, Z. E. Peterman, John S. Stuckless, J. S. Downey, Edwin D. Gutentag
TexCon : a text file conversion utility for use with Apple Macintosh computers
No abstract available.
Authors
Brian D. Marshall
TexCon : a text file conversion utility for use with Apple Macintosh computers
No abstract available.
Authors
Brian D. Marshall
CONTROL; a solid-source mass spectrometer data acquisition program for use with Hewlett-Packard computers
No abstract available.
Authors
Brian D. Marshall
Rb-Sr, Sm-Nd, K-Ca, O, and H isotopic study of Cretaceous-Tertiary boundary sediments, Caravaca, Spain: evidence for an oceanic impact site
Isotopic ratios and trace element abundances were measured on samples of Ir-enriched clay at the Cretaceous-Tertiary boundary, and in carbonate and marl from 5 cm below and 3 cm above the boundary. Samples were leached with acetic acid to remove carbonate, and with hydrochloric acid. Leachates and residues were measured. The Sr, Nd, O and H isotopic compositions of the boundary clay...
Authors
D.J. DePaolo, F.T. Kyte, B.D. Marshall, J. R. O'Neil, J. Smit
Proceedings of the Symposium on Mineral Deposits of the Pacific Northwest: Geological Society of America, Cordilleran Section meeting at Corvallis, Oregon, March 20-21, 1980
Stratiform and volcanogenic zinc-lead-barium deposits occur within the pelagic Kagvik sequence in the Red Dog Creek and Drenchwater Creek areas in the DeLong Mountains and Howard Pass quadrangles. The sulfide deposits occur together with barite, tuff, sandstone, shale, chert, and keratophyre flows and sills. The three main occurrences of the stratiform zinc-lead-barium deposits in the...
Authors
Miles L. Silberman, C. W. Field, Anne L. Berry
Non-USGS Publications**
Marshall, Brian D. and DePaolo, Donald J., 1989, Calcium isotopes in igneous rocks and the origin of granite: Geochimica et Cosmochimica Acta, v. 53, p. 917-922, https://doi.org/10.1016/0016-7037(89)90036-7.
Marshall, B.D., Woodard, H.H., and DePaolo, D.J., 1986, K-Ca-Ar systematics of authigenic sanidine from Waukau, Wisconsin, and the diffusivity of argon: Geology, v. 14, p. 936-938, https://doi.org/10.1130/0091-7613(1986)14<936:KSOASF>2.0.CO;2.
.
.
Marshall, B.D. and DePaolo, D.J., 1982, Precise age determinations and petrogenetic studies using the K-Ca method: Geochimica et Cosmochimica Acta, v.46, p. 2537-2545, https://doi.org/10.1016/0016-7037(82)90376-3.
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.