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The AAPG/Datapages Combined Publications Database
Houston Geological Society Bulletin
Abstract
Abstract: Carbonate Source Rocks in the Jurassic
Smackover Trend of Mississippi, Alabama,
and Florida
By
The Smackover trend is a belt of carbonate, evaporite, and
clastic rocks of Late Jurassic age which rims the U. S. Gulf
Coast from Texas to the Florida Panhandle. It has been a major
petroleum fairway for decades and continues to yield new
discoveries each year. One area of recent intensive activity
within this trend encompasses southern Mississippi, southern
Alabama, and extreme western Florida. Pertinent Jurassic stratigraphy in the area includes, in
descending order, the Haynesville formation (shallow-water
carbonate rocks with minor interbedded clastic units); the
Buckner Anhydrite; the Upper Smackover (carbonate
grainstones); the Lower Smackover (carbonate mudstones);
the Worphlet Formation (mainly sandstones), and the Louann
Salt.
Most of the oil and gas in this area is reservoired in the
Upper Smackover and Norphlet. Geochemical data suggest
that these oils and gases belong to one family and that all were
sourced from algal-rich "lime" mudstones of the Lower
Smackover. The geochemical data include light hydrocarbon
compositions, n-paraffin distributions, saturate and aromatic
group-type distributions, tetracycloalkane distributions, and
carbon-isotopic composition of saturate and aromatic
fractions.
Some of the richest potential source beds are sabkha-type,
algal-laminated micrites of the basal Smackover. End_of_Record - Last_Page 4---------------