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Tyler Coplen

Director, Reston Stable Isotope Laboratory

Contact Info


Short Biography

B.S. (Physics), Pacific Lutheran Univ. (1961-1966)        

M.S. (Geophysical Sciences/Geochemistry), Univ. of Chicago (1966-1968)  

Ph.D. (Geophysical Sciences/Geochemistry), Univ. of Chicago (1968-1970) 

Assistant Research Geochemist, University of California, Riverside (1970-1974)

Leader of the project titled Physical Chemistry of Stable Isotope Fractionation in Hydrologic Processes since 1974.

 

Head of the Reston Stable Isotope Laboratory since 1978 (see http://isotopes.usgs.gov/ ).

                    



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My Science Topics


Science Topic
Subtopic
Techniques and Methodsisotopic analysis
Techniques and Methodslaboratory methods



My USGS Science Strategy Areas

A Water Census of the United States

Research Objectives

Several light stable isotopes (H, C, N, O, Si, and S) show variations in their isotope abundances and can be used for the study of evaporation, ground-water mixing, biotransformations, lake or reservoir circulation and stratification and associated hydrochemical phenomena. These isotope fractionations are related to: (1) purely physical processes; (2) heterogeneous chemical equilibria; and (3) reaction kinetics. Many of these processes are not sufficiently understood or quantified to make the most effective use of stable isotope techniques in hydrologic research. Objectives of this project are to develop theoretical and instrumental mass spectrometric techniques through experimental investigation and to test techniques in suitable field locations, to aid in more complete utilization of light stable isotope phenomena in hydrologic studies. For additional information, see the Reston Stable Isotope Laboratory, www.isotopes.usgs.gov.

The Reston Stable Isotope Laboratory, which provides isotopic analysis of several thousand samples yearly to both the operational program and the NRP, and is a major service to the WRD. Because the results of such analytical services may be used in court cases or in national security activities, the laboratory strives for the highest quality measurements and develops state-of-the-art analytical methods.


Contact Information

Tyler Coplen
12201 Sunrise Valley Dr
Reston, VA 20192-0002
tbcoplen@usgs.gov
703-648-5862
703-648-5832 - Fax
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