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Coarse-grained Infill of Failure-generated Slope Accommodation, Tres Pasos Formation, West Face, Sierra Contreras, Southern Chile

By
Michael R. Shultz
Michael R. Shultz
1
Department of Geological and Environmental Sciences, Stanford University, Stanford, California, USA
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Timothy D. Cope
Timothy D. Cope
1
Department of Geological and Environmental Sciences, Stanford University, Stanford, California, USA
3
Present address: Department of Geosciences, Depauw University, Greencastle, Indiana, USA
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Andrea Fildani
Andrea Fildani
1
Department of Geological and Environmental Sciences, Stanford University, Stanford, California, USA
2
Present address: chevron Energy Technology Company, San Ramon, California, USA
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Stephan A. Graham
Stephan A. Graham
1
Department of Geological and Environmental Sciences, Stanford University, Stanford, California, USA
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Published:
January 01, 2008

Abstract

Two thick turbidite sandstone units collectively form the basal Tres Pasos Formation sandstone exposed on the west face of the Sierra Contreras mountain range, Ultima Esperanza, chile (Figures 1,2). Both sandstone units overlie and interact with thick mass-transport complexes (MTCs). These units are generically interpreted to represent infill of accommodation produced by slope failure, and may represent submarine fans, channel-fill units, crevasse-splay units, or units representing channel capture by slope failure. Extensive exposure of both coarse- and fine-grained strata make the Tres Pasos Formation an important analog system for hydrocarbon reservoirs in mud-rich, structurally complex, slope environments. This spectacular outcrop underscores the importance of slope failure on the preservation and stratigraphic architecture of deep-water sandstones.

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Contents

AAPG Studies in Geology

Atlas of Deep-Water Outcrops

Tor H. Nilsen
Tor H. Nilsen
Desceased
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Roger D. Shew
Roger D. Shew
University of North Carolina
Wilmington, North Carolina
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Gary S. Steffens
Gary S. Steffens
Shell International E&P
Houston, Texas
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Joseph R. J. Studlick
Joseph R. J. Studlick
Maersk Oil America Inc.
Houston, Texas
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American Association of Petroleum Geologists
Volume
56
ISBN electronic:
9781629810331
Publication date:
January 01, 2008

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