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Shock-induced devolatilization of calcite

Boslough, Mark B. and Ahrens, Thomas J. and Vizgirda, Joana and Becker, Richard H. and Epstein, Samuel (1982) Shock-induced devolatilization of calcite. Earth and Planetary Science Letters, 61 (1). pp. 166-170. ISSN 0012-821X. doi:10.1016/0012-821X(82)90049-8.

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The amounts of CO_2 and CO evolved upon shock compression and decompression of calcite to 18 GPa (180 kbar) have been determined using a new gas phase shock recovery technique and gas source mass spectrometry. The data demonstrate that from ∼0.03 to 0.3 mole percent of calcite is devolatilized at shock pressures significantly lower than those predicted (30 GPa) for the onset of volatilization by continuum thermodynamic theory and are in qualitative agreement with release adiabat data for calcite and aragonite. Carbon and oxygen isotope ratios in the shock-released CO_2 are the same as those in the unshocked (hydrothermal) calcite, demonstrating that the CO_2 comes from the calcite rather than other potential sources.

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Additional Information:© 1982 Elsevier Scientific Publishing Company. Received February 11, 1982. Revised version received July 15, 1982. We are grateful for the experimental assistance of Drs. Kon-Kee Liu and J. Leliwa-Kopystynski and to Professor S. Chan for the use of his ESR facility. This research was supported under NGL05-002-105 and NAS9-7944. Contribution No. 3685, Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125.
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Caltech Division of Geological and Planetary Sciences 3685
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Official Citation:Mark B. Boslough, Thomas J. Ahrens, Joana Vizgirda, Richard H. Becker, Samuel Epstein, Shock-induced devolatilization of calcite, Earth and Planetary Science Letters, Volume 61, Issue 1, November 1982, Pages 166-170, ISSN 0012-821X,
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:40737
Deposited By: Tony Diaz
Deposited On:27 Aug 2013 17:24
Last Modified:10 Nov 2021 00:08

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