Paper No. 69-7
Presentation Time: 9:00 AM-5:30 PM
LONG-TERM REPRODUCIBILITY OF STANDARDS FOR CLUMPED ISOTOPE MEASUREMENTS
JESMOK, Greg1, UPADHYAY, Deepshikha1, DAVILA, Nathaniel1, CLOUGH, Cassie2, BRICKER, Hayley1, MITSUNAGA, Bryce A.3, DEFLIESE, William F.4, ELLIOTT, Ben4 and TRIPATI, Aradhna K.5, (1)Department of Earth, Planetary and Space Sciences, University of California, Los Angeles, 595 Charles E. Young Dr. East, Los Angeles, CA 90095, (2)Environmental Science, University of California, Santa Cruz, Department of, Santa Cruz, CA 95064, (3)Department of Earth, Planetary, and Space Sciences, Departments of Atmospheric and Oceanic Sciences, Institute of the Environment and Sustainability, Institute of Geophysics and Planetary Physics, University of California, Los Angeles, 595 Charles Young Drive East, Box 951567, Los Angeles, CA 90095; Department of Earth, Planetary and Space Sciences, University of California, Los Angeles, 595 Charles E. Young Dr. East, Los Angeles, CA 90095, (4)Department of Earth, Planetary and Space Sciences, University of California, Los Angeles, 595 Charles E. Young Dr. East, Los Angeles, CA 90095; Department of Earth, Planetary, and Space Sciences, Departments of Atmospheric and Oceanic Sciences, Institute of the Environment and Sustainability, Institute of Geophysics and Planetary Physics, University of California, Los Angeles, 595 Charles Young Drive East, Box 951567, Los Angeles, CA 90095, (5)Department of Earth, Planetary, and Space Sciences, Departments of Atmospheric and Oceanic Sciences, Institute of the Environment and Sustainability, Institute of Geophysics and Planetary Physics, University of California, Los Angeles, 595 Charles Young Drive East, Box 951567, Los Angeles, CA 90095, jesmok@gmail.com
Carbonate clumped isotope thermometry uses the abundance of heavy isotope pairs (e.g., 13C-18O) within carbonate minerals as a measure of mineral formation temperature. The abundance of clumped isotopologues (isotopic species) are reported relative to a stochastic distribution. Using the reported values, a range of different procedures are used for the calculation of isotope ratios and standardization. To quantify isotope ratios in our lab, samples are measured interspersed with both carbonate standards and thermodynamically-equilibrated gas standards. These measurements allow for the reporting of data on an absolute reference frame, facilitating inter-lab comparisons. Here we examine the long-term reproducibility of carbonate standard data for clumped isotope measurements.
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