Geological Society of America

69 D32. Geochemistry (Posters)

Sunday, 22 October 2017
9:00 AM - 5:30 PM
Halls 4EF

LONG-TERM REPRODUCIBILITY OF STANDARDS FOR CLUMPED ISOTOPE MEASUREMENTS

Paper number: 69-7
Program: Technical Sessions
Time: 9:00 AM – 5:30 PM

Authors

Greg Jesmok Presenting Author
University of California, Los Angeles, Los Angeles, CA
Deepshikha Upadhyay
University of California, Los Angeles, Los Angeles, CA
Nathaniel Davila
University of California, Los Angeles, Los Angeles, CA
Cassie Clough
University of California, Santa Cruz, Department of, Santa Cruz, CA
Hayley Bricker
University of California, Los Angeles, Los Angeles, CA
Bryce A. Mitsunaga
University of California, Los Angeles, Los Angeles, CA
William F. Defliese
University of California, Los Angeles, Los Angeles, CA
Ben Elliott
University of California, Los Angeles, Los Angeles, CA
Aradhna K. Tripati
University of California, Los Angeles, Los Angeles, CA

Abstract

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.

Geological Society of America Abstracts with Programs. Vol. 49, No. 6

doi: 10.1130/abs/2017AM-306573

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