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The AAPG/Datapages Combined Publications Database

Journal of Petroleum Geology

Abstract

Journal of Petroleum Geology, Vol. 15, No.3, pp. 305-318, 1992

┬ęCopyright 2000 Scientific Press, Ltd.

LITHOSTRATIGRAPHY OF OIL-BEARING TERTIARY BIOHERMS IN THE SIRTE BASIN, LIBYA

Y. D. Gumati*

*Geology Department, UAE University, PO Box 16596, Al-Ain, UAE.


Abstract

In the early Palaeocene, a carbonate platform existed in the southern part of the Sirte Trough (a NW-trending depression in the eastern Sirte Basin), and a shale basin in the north. A major transgression occurred during the early Palaeocene, and part of the platform subsided, resulting in the formation of a basinal re-entrant within the carbonate province. A positive northerly-trending ridge, which was active in the early Palaeocene, persisted within the re-entrant during the late Palaeocene. This positive element provided a platform on which isolated bioherms grew, surrounded by shale deposits in the subsiding basin. The bioherms began as foraminiferal banks that built-out on local mounds in shallow water. Sparse coral growth bound coralline detritus, until richer coral development resulted in a large coral reef

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