Journal of Mineralogical and Petrological Sciences
Online ISSN : 1349-3825
Print ISSN : 1345-6296
ISSN-L : 1345-6296
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Evolution of permeability and fluid pathways in the uppermost oceanic crust inferred from experimental measurements on basalt cores
Kenta KAWAGUCHIIkuo KATAYAMA
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2018 Volume 113 Issue 5 Pages 268-272

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Abstract

To examine the systematic decrease in permeability with crustal age in the uppermost layer of the oceanic crust, we investigated the effect of mechanical compaction on the permeability of basalt cores from Hole 765D and Hole 456 of the Ocean Drilling Program. The results indicate that permeability systematically decreases with increasing confining pressure. However, the pressure effects observed in the laboratory experiments are insufficient to fully explain the result of insitu measurements of permeability through the oceanic crust. The permeability of core samples is closely related to porosity, both of which reduce with increasing crustal age. We infer that the evolution of permeability of the oceanic upper crust could be controlled by a reduction in porosity due to carbonate mineral precipitation.

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© 2018 Japan Association of Mineralogical Sciences
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