Limitations on the role of pore pressure in gravity gliding.

P. L. Guth; K. V. Hodges; J. H. Willemin

doi:10.1130/0016-7606(1982)93<606:LOTROP>2.0.CO;2

Limitations on the role of pore pressure in gravity gliding.

P. L. Guth, K. V. Hodges, J. H. Willemin

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6 Scopus citations

Abstract

We have developed a simple model to evaluate the gravity gliding of nappes in sedimentary terranes. Three factors play a critical role in the model: 1) the ratio of horizontal to vertical stress; 2) the rate of fluid flow to the detachment horizon, and 3) the permeability of lithologies immediately above that horizon. Effective cap-rock permeabilities less than 10 ^-4 to 10 ^{- 5} md are required for gravity gliding in a sedimentary basin. Based on available in situ permeability measurements, only shales and evaporites could have sufficiently low permeabilities on a regional scale. -Authors

Original language	English (US)
Pages (from-to)	606-612
Number of pages	7
Journal	Geological Society of America Bulletin
Volume	93
Issue number	7
DOIs	https://doi.org/10.1130/0016-7606(1982)93<606:LOTROP>2.0.CO;2
State	Published - Jan 1 1982
Externally published	Yes

ASJC Scopus subject areas

Geology

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AU - Hodges, K. V.

AU - Willemin, J. H.

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N2 - We have developed a simple model to evaluate the gravity gliding of nappes in sedimentary terranes. Three factors play a critical role in the model: 1) the ratio of horizontal to vertical stress; 2) the rate of fluid flow to the detachment horizon, and 3) the permeability of lithologies immediately above that horizon. Effective cap-rock permeabilities less than 10 -4 to 10 - 5 md are required for gravity gliding in a sedimentary basin. Based on available in situ permeability measurements, only shales and evaporites could have sufficiently low permeabilities on a regional scale. -Authors

AB - We have developed a simple model to evaluate the gravity gliding of nappes in sedimentary terranes. Three factors play a critical role in the model: 1) the ratio of horizontal to vertical stress; 2) the rate of fluid flow to the detachment horizon, and 3) the permeability of lithologies immediately above that horizon. Effective cap-rock permeabilities less than 10 -4 to 10 - 5 md are required for gravity gliding in a sedimentary basin. Based on available in situ permeability measurements, only shales and evaporites could have sufficiently low permeabilities on a regional scale. -Authors

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Limitations on the role of pore pressure in gravity gliding.

Abstract

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