Diapiric Structures on the Campeche Shelf and Slope, Western Gulf of Mexico

Recently collected seismic reflection profiles reveal numerous emerged and buried diapiric structures along the Campeche Shelf and slope, south of 20° N. latitude. Slope diapirs have steep sides, relatively flat tops, and a subsurface reflector which may be an expression of caprock. Shelf diapirs are buried structures characterized by uniformly stratified sediments trapped between rising intrusives or displaced by numerous high-angle faults. The limited east-west distribution and the lack of magnetic signature suggest that Campeche Sheli and slope diapirs are salt structures co-linear with previously mapped salt domes in the Tabasco-Campeche Basin and the Sigsbee Knolls.