Proposed Definitions for Salt Features Along the Louisiana Offshore
Published:January 01, 1994
1994. "Proposed Definitions for Salt Features Along the Louisiana Offshore", Seismic Stratigraphy and Hydrocarbon Traps: Louisiana Onshore and Offshore, Allen Lowrie, S. N. Domenico
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Salt wedge – (Sigsbee salt knapp complex, wedge of allochthonous salt) Salt wedge is defined as a general term to include the overall salt mass from any source or time, at present underlying the Louisiana slope.
Geometric definition: The geometric shape is an “indefinite” wedge with a blunt pinnacle, up to several thousand feet thick, under the Sigsbee Escarpment. Thus, it is understood that the salt wedge is not continuously salt-filled, nor is it continuous over the Louisiana slope.
Interpretative definition: This general term refers to all salt, from any source or time, which has coalesced into the overall lateral salt extrusion; see Worrall and Snelson, 1989, figure 15, for representation of dip section through the wedge, equal to Humphris' 1978 wedge.
Salt tongue – Salt tongue is defined as a general term to describe individual salt units that have coalesced into the overall salt wedge (Figure 4).
Geometric definition: The geometric shape of a salt tongue is approximately that of a poorly-defined wedge. Usually, the landward blunt pinnacle under the Sigsbee Escarpment. The wedge shape is “indefinite” in that separate and distinct salt units, generally lenticular in the dip direction, occupy portions of the wedge shape. Along strike, the distinct salt units are generally separate from the adjoining units. Length versus width ratios may range from 5: 1 to 10: 1. The various separate units, when summed together from shelf- break to escarpment, along dip, create a salt tongue, (Figure 4).
Interpretative definition: Salt tongues are defined as represent
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Seismic Stratigraphy and Hydrocarbon Traps: Louisiana Onshore and Offshore
“Synergisms among tectonics, sedimentation, and climate/sealevel oscillations provide hydrocarbon source, reservoirs, and traps. This book from the SEG Course Notes series examines these traits, as they exist in the on- and offshore region of Louisiana.”