Influence of Tectonics on Submarine Fan Deposition, Tanqua and Laingsburg Subbasins, South Africa
Erik D. Scott, Arnold H. Bouma, H. DeVille Wickens, 2000. "Influence of Tectonics on Submarine Fan Deposition, Tanqua and Laingsburg Subbasins, South Africa", Fine-Grained Turbidite Systems, Arnold H. Bouma, Charles G. Stone
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The Permian Tanqua and Laingsburg subbasins in the southwestern Karoo Basin, South Africa, had near-contemporaneous formation and filling. Five submarine fan systems are in the broad, shallow Tanqua subbasin and four in the more typical foredeep-style Laingsburg subbasin. Petrologic and micro-probe analysis of the sandstones indicates a distant source area. Tectonic events led to varying sea-floor topography that directed sediment transport to the subbasins. Tectonic activity was low to nonexistent during deposition of any one or more of the submarine fans and indicates that the depositional cycle is much shorter than a tectonic cycle. The tectonic style of a basin may not always define the sedimentary characteristics of turbidite systems deposited in that basin.
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Fine-Grained Turbidite Systems
This Memoir covers one of the most important and active exploration reservoirs being pursued by geoscientists worldwide: fine-grained turbidite systems. 28 chapters show the results of an intense research effort in the 1990s that resulted from the discovery of large hydrocarbon accumulations in fine-grained turbidite systems in Brazil, the Gulf of Mexico, West Africa, and the North Sea. Industry and academia have joined together in this publication and the result is a unique opportunity to study these turbidite systems from the outcrop to the modeling; through the interpretation with 2-D and 3-D seismic data; to case histories and analog studies from Arkansas and Oklahoma, South and West Africa, Gulf of Mexico, west Texas, and New Zealand.