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

165 Scopus citations

Abstract

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
Volume5
Issue number5-6
DOIs
StatePublished - 1990
Externally publishedYes

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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