Geochemistry of reduced gas related to serpentinization of the Zambales ophiolite, Philippines

T. A. Abrajano*, N. C. Sturchio, B. M. Kennedy, G. L. Lyon, K. Muehlenbachs, J. K. Bohlke

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    160 Scopus citations


    Methane-hydrogen gas seeps with mantle-like C and noble gas isotopic characteristics issue from partially serpentinized ultramafic rocks in the Zambales ophiolite, Philippines. New measurements of noble gas and 14C isotope abundances, rock/mixed-volatile equilibrium calculations, and previous chemical and isotopic data suggest that these reduced gases are products of periodotite hydration. The gas seeps are produced in rock-dominated zones of serpentinization, and similar gases may be ubiquitous in ultramafic terranes undergoing serpentinization.

    Original languageEnglish (US)
    Pages (from-to)625-630
    Number of pages6
    JournalApplied Geochemistry
    Issue number5-6
    StatePublished - 1990

    Bibliographical note

    Funding Information:
    Acknowledgements--This work was supported by the U.S. Department of Energy, Office of Basic Energy Sciences, under contract W-31-109-Eng-38 (Argonne National Laboratory) and UCB-34P32-146 (University of California, Berkeley). D. C. Lowe, R. J. Sparks and G. Wallace of the Institute of Nuclear Sciences (DSIR, New Zealand) performed the 14C measurements. Very thoughtful reviews by J. Apps, R. Coveney and Y. K. Kharaka are deeply appreciated.

    ASJC Scopus subject areas

    • Environmental Chemistry
    • Pollution
    • Geochemistry and Petrology


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