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The AAPG/Datapages Combined Publications Database
Houston Geological Society Bulletin
Abstract
Abstract: Effects of Inherited Pre-Jurassic Tectonics
on the U.S. Gulf Coast
By
Mitchell Energy Corporation
Post-rifting tectonic patterns along the Gulf Coast retain an inherited fabric reflecting the Triassic rifting. Triassic horsts, grabens, and half-grabens localized and delineated later microbasins.
Mapping of trend offsets indicate that NW-SE linear patterns
exist and imply the presence of small-scale "transform" faults
within these basins that control the position and size of individual
microbasins. It is inferred that many Gulf Coast growth-fault
basins are at depths related to basement block
faulting and thus
fit this definition of microbasins.
Irregular thicknesses of Louann salt have resulted from salt precipitation
on a block
-faulted basement. The uneven thickness of
salt within individual grabens and half-grabens has controlled the
distribution and size of the resultant salt structures. Three
block
diagram models demonstrate this relationship for the South Texas
Wilcox, North Louisiana Smackover and the Southeast Texas Salt
Dome Basin.
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