Central Gulf Consortium II
The central Gulf region has been the focus of several GERG piston coring consortium studies. Although the results have revealed thermogenic hydrocarbons widely distributed in the near-surface sediments, prolific hydrocarbon seeps have been encountered at only a few locations. This is in contrast to deepwater protraction areas to the west (e.g., Garden Banks), where hydrocarbon seeps are more common.
The Central Gulf Consortium II (1996-1997) in-filled regional coverage with 224 cores over deep-water areas of Mississippi Canyon, Atwater Valley, Green Canyon and Walker Ridge. The results identified seeps at new locations in Mississippi Canyon and in southern Green Canyon. Biomarker analysis of the seep hydrocarbons suggest a wider regional extent of better-quality oils than had been previously assumed.
Deliverables for this study include PDF images of core logs (core locations and descriptions), data volumes with the results of the following analyses: total scanning fluorescence, C15+ gas chromatography, C1-C4 hydrocarbons (headspace), and biomarker, and a final, interpretive report.