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Book Chapter

Sequence Stratigraphic Architecture of the Late Permian Tanqua Submarine Fan Complex, Karoo Basin, South Africa

By
R. K. Goldhammer
R. K. Goldhammer
Texaco Exploration, Bellaire, Texas, U.S.A.
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H. Deville Wickens
H. Deville Wickens
Kuils River, South Africa
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A. H. Bouma
A. H. Bouma
Department of Geology and Geophysics, Louisiana State University, Baton Rouge, Louisiana, U.S.A.
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G. Wach
G. Wach
E&P Technology Department, Texaco, Houston, Texas, U.S.A.
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Published:
January 01, 2000

Abstract

The Late Permian Ecca Group (1300 m thick) in the Tanqua Karoo consists of a basin floor fan complex (400 m thick), overlain by river-dominated deltaic deposits and associated updip fluvial deposits. This succession is subdivided into two “third-order” depositional sequences with several superimposed high-frequency, “fourth-order” depositional sequences. The Tanqua submarine fan complex contains six regionally distinct fan systems (24 to 60 m thick), five of which form a progradational stack, as revealed by their spatial distribution and regional facies variation. The sixth fan is situated to the south and downlaps onto the fifth fan. This long-term (third-order) progradational pattern records a combination of reduced accommodation space and/or increased sediment supply. Each fan system is assigned to the lowstand systems tract of each high-frequency, fourth-order sequence, and the particular attributes of each fan system are a consequence of their respective positions within the lower-frequency third-order sequence.

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Contents

AAPG Memoir

Fine-Grained Turbidite Systems

Arnold H. Bouma
Arnold H. Bouma
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Charles G. Stone
Charles G. Stone
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American Association of Petroleum Geologists
Volume
72
ISBN electronic:
9781629812625
Publication date:
January 01, 2000

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