Personal information

Geochemistry
United States

Activities

Employment (4)

University of Maryland: College Park, MD, US

1990-08 to present | Professor (Department of Geology)
Employment
Source: Self-asserted source
Richard Walker

US Geological Survey: Reston, VA, US

1988 to 1990 | Research Scientist (Isotope Branch)
Employment
Source: Self-asserted source
Richard Walker

Carnegie Institution Department of Terrestrial Magnetism: Washington, DC, US

1987 to 1988 | Postdoctoral Fellow (DTM)
Employment
Source: Self-asserted source
Richard Walker

NIST Physical Measurement Laboratory: Gaithersburg, MD, US

1985 to 1987 | National Research Council Postdoctoral Fellow (Isotope Group)
Employment
Source: Self-asserted source
Richard Walker

Education and qualifications (3)

Stony Brook University: Stony Brook, NY, US

1981-06 to 1984-12 | Ph.D. (Earth and Space Sciences)
Education
Source: Self-asserted source
Richard Walker

Stony Brook University: Stony Brook, NY, US

1979-08 to 1981-05 | M.S. (Earth and Space Science)
Education
Source: Self-asserted source
Richard Walker

College of William and Mary: Williamsburg, VA, US

1975-09 to 1979-05 | B.S. (Geology)
Education
Source: Self-asserted source
Richard Walker

Funding (40)

Application of Siderophile Elements to the Study of the Chemical Structure and Mixing History of the Oceanic Mantle

Source: Self-asserted source
Richard Walker via DimensionsWizard
grade
Preferred source (of 2)‎

CSEDI Collaborative Research: Application of Siderophile Elements to Early Earth Processes and Mantle Mixing

2013-08-01 to 2016-07-31 | Grant
National Science Foundation - Directorate for Geosciences (Arlington, US)
GRANT_NUMBER: 1265169
Source: Self-asserted source
Richard Walker via DimensionsWizard
grade
Preferred source (of 2)‎

Acquisition of a State-of-the-Art Thermal Ionization Mass Spectrometer

2013-05-15 to 2015-04-30 | Grant
National Science Foundation - Directorate for Geosciences (Arlington, US)
GRANT_NUMBER: 1255787
Source: Self-asserted source
Richard Walker via DimensionsWizard
grade
Preferred source (of 2)‎

ESTABLISHED CHEMICAL PURIFICATION TECHNIQUES WILL BE COMBINED WITH HIGH-PRECISION THERMAL IONIZATION AND INDUCTIVELY-COUPLED PLASMA MASS SPECTROMETRY TO PURSUE 4 MAJOR TASKS: (I) APPLICATIONS OF THE 182HF-182W SYSTEM. USING OUR NEWLY DEVELOPED TECHNIQUES

CSEDI Collaborative Research: Application of siderophile elements to mantle geodynamics

2012-05-15 to 2014-04-30 | Grant
National Science Foundation - Directorate for Geosciences (Arlington, US)
GRANT_NUMBER: 1160728
Source: Self-asserted source
Richard Walker via DimensionsWizard
grade
Preferred source (of 2)‎

Highly Siderophile Elements as Tracers of Mantle-crust Interactions in Subduction Zone Metamorphic Rocks

2011-08-01 to 2015-07-31 | Grant
National Science Foundation - Directorate for Geosciences (Arlington, US)
GRANT_NUMBER: 1119111
Source: Self-asserted source
Richard Walker via DimensionsWizard
grade
Preferred source (of 2)‎

Established chemical purification techniques will be combined with high-precision thermal ionization and inductively-coupled plasma mass spectrometry to pursue 4 major tasks: (i) Nucleosynthetic Anomalies in Meteorites. Osmium, Ru and Mo isotopes will be

PGE, Re-Os and Lu-Hf Isotopic Signature of Lithosphere Removal Beneath the North China Craton

2009-09-15 to 2014-08-31 | Grant
National Science Foundation - Directorate for Geosciences (Arlington, US)
GRANT_NUMBER: 0911096
Source: Self-asserted source
Richard Walker via DimensionsWizard
grade
Preferred source (of 2)‎

ORIGIN AND EVOLUTION OF ORGANICS IN PLANETARY SYSTEMS Despite our recent progress, there are many uncertainties and important questions that remain with regard to the nature and timing of the late influx. The object of this aspect of study will be to cont

Collaborative Research: CSEDI--Origin and Evolution of Highly Siderophile Elements in Earth's Mantle

2008-05-01 to 2012-04-30 | Grant
National Science Foundation - Directorate for Geosciences (Arlington, US)
GRANT_NUMBER: 0757808
Source: Self-asserted source
Richard Walker via DimensionsWizard
grade
Preferred source (of 2)‎

ACQUISITION OF A HIGH PRESSURE ASHER Current state-of-the-art mass spectrometry now allows precise Os (osmium) isotopic measurement of quantities of material totaling between 10-12g (pico-gram) and 10-15g (femto-gram). Natural samples of planetary or sola

The Timing and Geometry of Lithosphere Removal Beneath the North China Craton

2007-06-01 to 2010-05-31 | Grant
National Science Foundation - Directorate for Geosciences (Arlington, US)
GRANT_NUMBER: 0635671
Source: Self-asserted source
Richard Walker via DimensionsWizard
grade
Preferred source (of 2)‎

Acquisition of a State-of-the-Art Thermal Ionization Mass Spectrometer

2006-03-01 to 2008-02-29 | Grant
National Science Foundation - Directorate for Geosciences (Arlington, US)
GRANT_NUMBER: 0549300
Source: Self-asserted source
Richard Walker via DimensionsWizard
grade
Preferred source (of 2)‎

Rhenium-Osmium Isotope Investigations of the Taitao Ophiolite

2004-01-01 to 2007-12-31 | Grant
National Science Foundation - Directorate for Geosciences (Arlington, US)
GRANT_NUMBER: 0335933
Source: Self-asserted source
Richard Walker via DimensionsWizard
grade
Preferred source (of 2)‎

CSEDI: Collaborative Research:Development of Geochemical Tests for Detection of Core-Mantle Interaction

2003-12-15 to 2007-11-30 | Grant
National Science Foundation - Directorate for Geosciences (Arlington, US)
GRANT_NUMBER: 0330528
Source: Self-asserted source
Richard Walker via DimensionsWizard
grade
Preferred source (of 2)‎

Melt Influx and the Effects on Os-Sr-Nd Isotopic Systems and Platinum Group Elements in Jurassic Oceanic Mantle (Totalp Massif, Swiss Alps)

Source: Self-asserted source
Richard Walker via DimensionsWizard
grade
Preferred source (of 2)‎

Characterizing Eastern North American Mantle Using Re-Os

2003-01-01 to 2005-12-31 | Grant
National Science Foundation - Directorate for Geosciences (Arlington, US)
GRANT_NUMBER: 0229995
Source: Self-asserted source
Richard Walker via DimensionsWizard
grade
Preferred source (of 2)‎

Collaborative Research: Characterizing the Late Veneer

2002-06-01 to 2005-05-31 | Grant
National Science Foundation - Directorate for Geosciences (Arlington, US)
GRANT_NUMBER: 0207107
Source: Self-asserted source
Richard Walker via DimensionsWizard
grade
Preferred source (of 2)‎

186Os Investigations into the Origins of Osmium in Seawater

2001-10-01 to 2003-09-30 | Grant
National Science Foundation - Directorate for Geosciences (Arlington, US)
GRANT_NUMBER: 0116955
Source: Self-asserted source
Richard Walker via DimensionsWizard
grade
Preferred source (of 2)‎

CSEDI Collaborative Geochemical Research on the Deep Mantle

2000-08-01 to 2002-07-31 | Grant
National Science Foundation - Directorate for Geosciences (Arlington, US)
GRANT_NUMBER: 0001921
Source: Self-asserted source
Richard Walker via DimensionsWizard
grade
Preferred source (of 2)‎

A Rhenium-Osmium Study of Alkaline Basalts from Vesteris Seamount and the Jan Mayen area in the North Atlantic

2000-04-15 to 2001-03-31 | Grant
National Science Foundation - Directorate for Geosciences (Arlington, US)
GRANT_NUMBER: 9911609
Source: Self-asserted source
Richard Walker via DimensionsWizard
grade
Preferred source (of 2)‎

Accomplishment-Based Renewal (ABR) - Rhenium-Osmium Isotope Study of the Mantle

2000-03-01 to 2004-02-29 | Grant
National Science Foundation - Directorate for Geosciences (Arlington, US)
GRANT_NUMBER: 9909197
Source: Self-asserted source
Richard Walker via DimensionsWizard
grade
Preferred source (of 2)‎

187Re-187Os, 190Pt-186Os, 34S/32S Isotopic Systematics of the Subcontinental Mantle of the Western United States

2000-01-01 to 2001-08-31 | Grant
National Science Foundation - Directorate for Geosciences (Arlington, US)
GRANT_NUMBER: 0096207
Source: Self-asserted source
Richard Walker via DimensionsWizard
grade
Preferred source (of 2)‎

Acquisition of a Multi-Collector Inductively Coupled Plasma Mass Spectrometer for Geochemical and Cosmochemical Investigations

Source: Self-asserted source
Richard Walker via DimensionsWizard
grade
Preferred source (of 2)‎

187Re-187Os, 190Pt-186Os, 34S/32S Isotopic Systematics of the Subcontinental Mantle of the Western United States

1998-09-01 to 2000-07-31 | Grant
National Science Foundation - Directorate for Geosciences (Arlington, US)
GRANT_NUMBER: 9804909
Source: Self-asserted source
Richard Walker via DimensionsWizard
grade
Preferred source (of 2)‎

Acquisition of a State of the Art Electron Probe Microanalyzer

1998-08-15 to 2002-07-31 | Grant
National Science Foundation - Directorate for Geosciences (Arlington, US)
GRANT_NUMBER: 9810244
Source: Self-asserted source
Richard Walker via DimensionsWizard
grade
Preferred source (of 2)‎

CSEDI Collaborative Research: The 190Pt-1860s System as a Test of Core-Mantle Interaction: Phase III

1998-08-01 to 2001-01-31 | Grant
National Science Foundation - Directorate for Geosciences (Arlington, US)
GRANT_NUMBER: 9809451
Source: Self-asserted source
Richard Walker via DimensionsWizard
grade
Preferred source (of 2)‎

Rhenium-Osmium Isotope Study of the Mantle

1998-03-01 to 2000-08-31 | Grant
National Science Foundation - Directorate for Geosciences (Arlington, US)
GRANT_NUMBER: 9711454
Source: Self-asserted source
Richard Walker via DimensionsWizard
grade
Preferred source (of 2)‎

Technician Support: Phase II for the Isotope Geochemistry Laboratory, Department of Geology, University of Maryland at College Park

Source: Self-asserted source
Richard Walker via DimensionsWizard
grade
Preferred source (of 2)‎

CSEDI Collaborative Research: The 190Pt-186Os System as a Test of Core-Mantle Interaction: Phase II

1997-09-01 to 1999-02-28 | Grant
National Science Foundation - Directorate for Geosciences (Arlington, US)
GRANT_NUMBER: 9709896
Source: Self-asserted source
Richard Walker via DimensionsWizard
grade
Preferred source (of 2)‎

Lithium Isotope Investigations of Magmatic and Hydrothermal Systems

1997-06-15 to 2000-12-31 | Grant
National Science Foundation - Directorate for Geosciences (Arlington, US)
GRANT_NUMBER: 9706469
Source: Self-asserted source
Richard Walker via DimensionsWizard
grade
Preferred source (of 2)‎

CSEDI: Collaborative Research of the 190Pt-186Os System as a Test of Core-Mantle Interaction

1996-07-15 to 1997-12-30 | Grant
National Science Foundation - Directorate for Geosciences (Arlington, US)
GRANT_NUMBER: 9628703
Source: Self-asserted source
Richard Walker via DimensionsWizard
grade
Preferred source (of 2)‎

Rhenium-Osmium Isotope Study of the Mantle

1996-03-01 to 1998-02-28 | Grant
National Science Foundation - Directorate for Geosciences (Arlington, US)
GRANT_NUMBER: 9526329
Source: Self-asserted source
Richard Walker via DimensionsWizard
grade
Preferred source (of 2)‎

Collaborative Research: Physical and Chemical Processes in Silicic Magma Chambers Invaded by Basalt

1996-01-01 to 1999-06-30 | Grant
National Science Foundation - Directorate for Geosciences (Arlington, US)
GRANT_NUMBER: 9526784
Source: Self-asserted source
Richard Walker via DimensionsWizard
grade
Preferred source (of 2)‎

Student Support for the Third Hutton Symposium

1995-06-01 to 1996-05-31 | Grant
National Science Foundation - Directorate for Geosciences (Arlington, US)
GRANT_NUMBER: 9423071
Source: Self-asserted source
Richard Walker via DimensionsWizard
grade
Preferred source (of 2)‎

A Geochemical Technician for the Department of Geology, University of Maryland, College Park

1994-04-01 to 1997-09-30 | Grant
National Science Foundation - Directorate for Geosciences (Arlington, US)
GRANT_NUMBER: 9317136
Source: Self-asserted source
Richard Walker via DimensionsWizard
grade
Preferred source (of 2)‎

SGER: Lithium Isotope Investigations of Magmatic and Environmental Systems

1994-03-15 to 1996-02-29 | Grant
National Science Foundation - Directorate for Geosciences (Arlington, US)
GRANT_NUMBER: 9404039
Source: Self-asserted source
Richard Walker via DimensionsWizard
grade
Preferred source (of 2)‎

Re-Os Isotope Investigations of Mantle-Derived Systems

1994-02-15 to 1996-07-31 | Grant
National Science Foundation - Directorate for Geosciences (Arlington, US)
GRANT_NUMBER: 9315900
Source: Self-asserted source
Richard Walker via DimensionsWizard
grade
Preferred source (of 2)‎

Re-Os Isotope Studies of Ultramafic Rocks and Noble Metal Ores

1992-01-15 to 1994-06-30 | Grant
National Science Foundation - Directorate for Geosciences (Arlington, US)
GRANT_NUMBER: 9117684
Source: Self-asserted source
Richard Walker via DimensionsWizard
grade
Preferred source (of 2)‎

Acquisition of a Pulsed Laser System for Resonance Ionization Mass Spectrometry and a Thermal Ionization Mass Spectrometer.

Source: Self-asserted source
Richard Walker via DimensionsWizard
grade
Preferred source (of 2)‎

Peer review (4 reviews for 2 publications/grants)

Review activity for Earth and planetary science letters. (3)
Review activity for Icarus. (1)