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|a 10.1029/2022GL100395
|2 doi
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|a eng
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| 100 |
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|a Aiken, John M
|e verfasserin
|4 aut
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| 245 |
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|a Gas Migration Episodes Observed During Peridotite Alteration in the Samail Ophiolite, Oman
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|c 2022
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|a Text
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|a Date Revised 09.09.2024
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a © 2022. The Authors.
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|a 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 rapidly into the borehole when a critical pressure, likely associated with a capillary barrier at a flow constriction, is reached. Our observations reveal a dynamic mode of fluid migration during serpentinization, and highlight the important role that free gas can play in modulating pore pressure, fluid flow, and alteration kinetics during peridotite weathering
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|a Journal Article
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|a hydroacoustics
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| 650 |
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|a hydrogeology
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| 650 |
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|a reaction driven cracking
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| 650 |
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|a serpentinization
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| 700 |
1 |
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|a Sohn, Robert A
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Renard, François
|e verfasserin
|4 aut
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| 700 |
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|a Matter, Juerg
|e verfasserin
|4 aut
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| 700 |
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|a Kelemen, Peter
|e verfasserin
|4 aut
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| 700 |
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|a Jamtveit, Bjørn
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Geophysical research letters
|d 1984
|g 49(2022), 21 vom: 16. Nov., Seite e2022GL100395
|w (DE-627)NLM098182501
|x 0094-8276
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| 773 |
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|g volume:49
|g year:2022
|g number:21
|g day:16
|g month:11
|g pages:e2022GL100395
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|u http://dx.doi.org/10.1029/2022GL100395
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