--> Abstract: Slumping, Sliding and Basin Floor Physiography: Controls on Turbidite Deposition and Fan Geometries in the Paleocene Grane Field area, Block 25/11, Norwegian North Sea, by O. J. Martinsen, G. Indrevir, T. Dreyer, G. Mangerud, A. Ryseth, and L. Soyseth; #90937 (1998).

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Abstract: Slumping, Sliding and Basin Floor Physiography: Controls on Turbidite Deposition and Fan Geometries in the Paleocene Grane Field area, Block 25/11, Norwegian North Sea

MARTINSEN, OLE J., GEIR INDREViR, TOM DREYER, GUNN MANGERUD, ALF RYSETH and LISBETH SOYSETH; Norsk Hydro Research Center, Bergen, Norway.-

Summary

Upper Paleocene reservoir units of the Grane Field area in the Viking Graben in the Norwegian sector of the North Sea occur in two submarine fan systems of widely variable geometry. Both systems are very sandrich, but the northern system displays a classic radial shape, while the southern system displays an elongate shape. The northern, oldest system formed in an unconfined basin setting where flow of turbidity currents was laterally unrestricted. In contrast, the southern, younger system, formed in a confined setting between the Utsira structural high and the prograding western basin slope. Deposition of turbidite sands in the southern system was also controlled by topographic lows created by earlier slumping, and the entire fan was later deformed by sliding back towards the margin of the Viking Graben as a result of relative tectonic uplift of the Utsira High.

AAPG Search and Discovery Article #90937©1998 AAPG Annual Convention and Exhibition, Salt Lake City, Utah