Gas Migration Episodes Observed During Peridotite Alteration in the Samail Ophiolite, Oman.

ABSTRACT: Serpentinization and carbonation of mantle rocks (peridotite alteration) are fundamentally important processes for a spectrum of geoscience topics, including arc volcanism, earthquake processes, chemosynthetic biological communities, and carbon sequestration. Data from a hydrophone array deployed in the Multi-Borehole Observatory (MBO) of the Oman Drilling Project demonstrates that free gas generated by peridotite alteration and/or microbial activity migrates through the formation in discrete bursts of activity. We detected several, minutes-long, swarms of gas discharge into Hole BA1B of the MBO over the course of a 9 month observation interval. The episodic nature of the migration events indicates that free gas accumulates in the permeable flow network, is pressurized, and discharges rapi

SUBMITTER: Aiken JM 

PROVIDER: S-EPMC9787822 | biostudies-literature | 2022 Nov

REPOSITORIES: biostudies-literature