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Book Chapter

Setting and Architectural Elements of the Champsaur Sandstones, France

By
R. L. Brunt
R. L. Brunt
1
STRAT Group, Department of Earth and Ocean Sciences, University of Liverpool, United Kingdom
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W. D. McCaffrey
W. D. McCaffrey
2
School of Earth and Environment, University of Leeds, United Kingdom
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R. H. Butler
R. H. Butler
2
School of Earth and Environment, University of Leeds, United Kingdom
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Published:
January 01, 2008

Abstract

The champsaur outlier preserves a remnant of a subbasin, which formed part of the regional Alpine foreland basin. The champsaur now forms part of the external western Alps, preserved in a broad east-west-trending syncline, the northern limb of which uncon-formably overlies the southwest margin of the crystalline Pelvoux massif. The southern margin of the basin is not preserved. Grès du champsaur stratigraphy consists of an autochthonous unit that is overlain to the east by two further thrust-bound units of successively younger turbidites, these are sourced from the southeast (Figure 1). The detail in this paper refers exclusively to the autochthonous Grès du champsaur. Northeast-directed gravity currents entered the champsaur basin and continued down the easterly dipping axial slope. Deposition was confined to the north by the east-west-trending southern flank of the Pelvoux massif. Ongoing burial of lateral slopes and early basin-floor topography contributes to the observed changes in paleoflow dispersal and system architecture. Key architectural surfaces were correlated and three-dimensionally mapped throughout the champsaur, facilitating the development of an architectural model. The model was used to divide the Grès du champsaur into three distinct stratigraphic units based on sedimentary characteristics >and turbidite architecture (McCaffrey et al., 2002) in order to analyze spatial variations in sedimentary facies and architecture.

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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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