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Book Chapter

Mechanics of Diapir Growth

Published:
January 01, 1984

Abstract

Overburden parallel to dipping source layer (fig. 1A). All layers are equally thick. The overburden pressure (lithostatic pressure) = λ (acceleration due to gravity) times the sum of all the products of layer thickness, η, and density, P, with correction for dip, a. The pressure head within the fluid source layer is equal at points P1 and P2 and everywhere else along the upper contact of the source layer. Thus the total hydraulic head between P1 and P2 equals only the difference in gravity head. Because P1 is lower than P2, salt flows downhill in the direction of lower total hydraulic head. In this example salt flows downhill regardless of the overburden density. Where both the source layer and its overburden are horizontal, the pressure head and gravity head are constant along a horizontal plane. The total hydraulic head is zero, so no flow occurs.

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AAPG Continuing Education Course Notes Series

Structural and Depositional Styles of Gulf Coast Tertiary Continental Margins: Application to Hydrocarbon Exploration

Martin P.A. Jackson
Martin P.A. Jackson
Bureau of Economic Geology, The University of Texas at Austin
Search for other works by this author on:
William E. Galloway
William E. Galloway
Bureau of Economic Geology, The University of Texas at Austin
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American Association of Petroleum Geologists
Volume
25
ISBN electronic:
9781629811543
Publication date:
January 01, 1984

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