Acquisition, processing, and analysis of shallow, high-resolution seismic data from the outer continental shelf and upper slope, offshore Louisiana

Shallow, high-resolution multichannel 2-D seismic data, with acquisition pa rameters designed to image core- and outcrop-scale stratigraphic features, were collected across the outer shelf and upper slope, offshore Louisiana. Errors during seismic acquisition led to complications in data processing; however, the quality of the processed data was still excellent. Frequencies up to 1000-1200 Hz were recovered from the subsurface to approximately 150 -250 ms (112.5-187.5 m) below the sea-Boor, permitting resolution of beds a s thin as 0.4 m, Frequencies of 400 Hz or greater are needed to resolve the detailed internal geometry of the middle to upper Pleistocene shelf-edge d eltas targeted by this study, where the average spacing between the major d eltaic clinoform reflections is approximately 2 ms (1.5 m), The deltaic cli noforms dip at angles up to 8 degrees, and may be spatially aliased at freq uencies above 854 Hz at the 3.125 m CDP spacing of this survey. A CDP spaci ng of 2.2 m or less would be required in order to avoid spatial aliasing of the 1200 Hz events at a dip angle of 8 degrees.