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The AAPG/Datapages Combined Publications Database

Journal of Petroleum Geology

Abstract

Journal of Petroleum Geology, Vol.10, No.1, pp. 59-72, 1987

┬ęCopyright 2000 Scientific Press, Ltd.

THE THREE-PHASE DEVELOPMENT OF THE PORCUPINE SEABIGHT: BASIN FORMATION AND THE STRUCTURALLY-DEPENDENT SEDIMENTARY PATTERN

M. D. Max*

*Naval Research Laboratory, Code 5110, Washington DC, 20375-5000, USA.


Abstract

The Porcupine Seabight appears to have been formed in three distinct episodes, each reflecting somewhat different structural controls. The oldest episode was rifting and selective crustal thinning associated with Permo-Triassic taphrogenes, during which there was some dextral movement on NW-trending faults. The important second episode was probably Mid-Jurassic to Mid-Cretaceous, and involved major crustal thinning related to nearby oceanic crust spreading, which initially reactivated and exploited structures in the continental crust while later imposing structural trends more related to the newly-developing oceanic crust rift-transform orientations. The last significant phase was one of minor adjustment, mainly by normal faulting of a down-to-basin character. Later, minor compression with some folding associated with reactivation along structural lines took place during Tertiary, probably Alpine times, but did not much affect the pattern of sedimentation within the Porcupine Seabight.

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