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SIGF - About

Located in the Eller O&M Building in the College of Geosciences at Texas A&M University, the Stable Isotope Geosciences Facility consists of two instrument laboratories, three sample preparation laboratories, and a Facility Manager’s office. With the 2017 installation of three new isotope ratio mass spectrometers (IRMSs), SIGF now houses one of the most comprehensive light stable isotope laboratories in the US, with five dynamic-source IRMSs and seven peripheral devices with the capabilities of performing high precision H, C, N, O, S and clumped analyses on carbonates, sediments, waters, and organic matter. The current configuration includes

  • ThermoElectron MAT253 IRMS with a Kiel IV automated carbonate device for C and O isotope analyses of carbonate minerals
  • Thermo Fisher Scientific 253 Plus IRMS and Kiel IV automated carbonate device for clumped isotope analyses of carbonate minerals
  • ThermoFinnigan DeltaPlusXP IRMS with an elemental analyzer (EA) for C and N isotope analyses of bulk organic matter
  • Thermo Fisher Scientific Delta V Advantage IRMS with GC-Isolink for compound specific analyses of H, C, and N isotopes of organic compounds
  • Thermo Fisher Scientific Delta V Advantage Flash Elemental Analyzer (EA) IRMS for C, N, and S isotope analyses of bulk organic matter

Additional peripherals coupled to the Delta instruments include a high temperature EA (TCEA) for H and O isotope analyses of water and O isotope analyses of cellulose, and a Gas Bench II for C and O isotope analyses of water and carbonates. SIGF also operates a Picarro L2130i Cavity Ring-Down Spectrometer capable of high precision H and O isotope analyses of water. this instrumentation was purchased with National Science Foundation and TAMU funds. 

SIGF is managed by Dr. Christopher Maupin, who has extensive experience in the operation, maintenance, and repair of IRMS systems. Drs. Brendan Roark and Ethan Grossman serve as co-Directors of SIGF, and serve on the Executive Committee along with PI’s Drs. Niall Slowey and Yige Zhang.  SIGF is supported by the College of Geosciences and the Departments of Geography, Geology and Geophysics, and Oceanography at TAMU, and revenue generated by PI and client analyses.

Student Opportunities

June, 2013 - Graduate Research Assistantship in Climate Change Research. We invite highly motivated Ph.D. and Ph.D.-aspiring M.S. students to apply for a graduate assistantship under the auspices of the Stable Isotope Geosciences Facility at Texas A&M University (http://stableisotope.tamu.edu/). This assistantship, in the Department of Geography, pursues biogeochemical proxy development in deep-sea corals. Funding is available for at least three years with additional funding available through TAs. Preference will be given to students with experience and interest in mass spectrometry. Contact Brendan Roark ( broark@geog.tamu.edu).

February 2011 - The Stable Isotope Geosciences Facility is continually looking to broaden its base of undergraduate student workers. Although students from The College of Geosciences are preferred, we will consider undergraduate student workers from other departments with an interest in working with light element stable isotopes (i.e. Ecology, Fish and Wildlife Management, Soil Science, Water Chemistry). If you meet these criteria then please send a CV to stableisotope@tamu.edu.

Graduate Research Assistantships

Graduate Research Assistantships in Climate Change Research

We invite highly motivated Ph.D. and Ph.D.-aspiring M.S. students to apply for two graduate assistantships under the auspices of the Stable Isotope Geosciences Facility at Texas A&M University. Both assistantships involve development and application of trace element and stable isotope proxies to study climate change and paleoceanography. The first, in the Department of Geography (Roark), pursues biogeochemical proxy development in deep-sea corals. The second, in the Department of Geology & Geophysics through the Halbouty Chair in Geology (Grossman), applies geochemical proxies to macrofossils to understand Caribbean extinction or Paleozoic paleoclimate. Funding is available for at least three years with additional funding available through TAs. Preference will be given to students with experience and interest in mass spectrometry. Contact Brendan Roark ( broark@geog.tamu.edu) or Ethan Grossman ( e-grossman@tamu.edu).

Links of Interest

 

College of Geosciences

Department of Atmospheric Sciences

Department of Geography

Department of Geology and Geophysics

Department of Oceanography

Stable Isotope Precipitation Links

Fundamentals of Isotope Geochemistry

The Forensic Isotope Radio Mass Spectrometry (FIRMS) Network

Links for Geochemists

Web Stable Isotope Calculator

Environmental and Isotope Geochemistry

IsoGeoChem Wiki

Thermo Scientific

Supporting the Facility

We here at the Stable Isotope Geosciences Facility (SIGF) would like to thank our Sponsors for making it possible to be a top facility for stable isotopic research and allowing us the opportunity to continue our research for the next generations. Without our sponsors, this facility would not be possible. Thanks and Gig 'Em!

Our sponsors are the Department of Geography, Department of Geology and Geophysics, the Department of Oceanography, the College of Geosciences, Texas A&M University, and the National Science Foundation.

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