Abstract - The Moab Anticline, south-east Utah is an exhumed
hydrocarbon palaeo-reservoir which was supplied by hydrocarbon stringers
that migrated up dip towards the structural crest of the anticline. Iron
oxide reduction in porous, high permeability aeolian sandstones provides
a record of the hydrocarbon migration pathways through the Middle Jurassic
Entrada Sandstone of the anticline. The distribution of the reduction patterns
across the flanks and the crest of the anticline permits examination of
the impact of structural and sedimentological heterogeneity on hydrocarbon
migration. Field observations indicate that reduction fronts were not affected
either by individual slip bands in damage zones around faults, or by faults
with sand:sand juxtapositions, but were influenced by sand/mudstone juxtapositions
and fault zones containing shale-smears.
Geofluids II - Contributions to the Second International Conference
on fluid evolution, migration, and interaction in sedimentary basins and
orogenic belts. (Eds. Hendry, J.P., Carey, P.F., Parnell, J., Ruffell,
A.H. & Worden, R.H.), 287-290, 1997.