Seismic geomorphology, lithology, and evolution of the late Pleistocene Mars-Ursa turbidite region, Mississippi Canyon area, northern Gulf of Mexico

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doi: 10.1306/08290605190
Author(s): Sawyer, Derek E.; Flemings, Peter B.; Shipp, R. Craig; Winker, Charles D.
Author Affiliation(s): Primary:
Pennsylvania State University, Department of Geosciences, University Park, PA, United States
Shell International Exploration and Production, Bellaire Technology Center, United States
Volume Title: AAPG Bulletin
Source: AAPG Bulletin, 91(2), p.215-234. Publisher: American Association of Petroleum Geologists, Tulsa, OK, United States. ISSN: 0149-1423 CODEN: AABUD2
Note: In English. 40 refs.; illus., incl. block diag., sects., sketch maps
Summary: The interplay between sedimentation and erosion during the late Pleistocene in the Mars-Ursa region, northern Gulf of Mexico, resulted in a complex compartmentalized reservoir. Rapid deposition, directly downdip of the Mississippi River beginning about 70 k.y., quickly filled antecedent topography in the Mars-Ursa region with a thick accumulation of sand and mud called the "blue unit". This permeable reservoir was rapidly and asymmetrically buried by thick, mud-rich levees of two channel-levee systems. Both systems plunged from north to south with a steeper gradient than the underlying blue unit. Rotated channel-margin slides present in both channel-levee systems rotated low-permeability, mud-rich levee deposits beneath the sand-rich channel fill. As a result of the channel-levee systems, the east-west hydraulic connectivity of the blue unit decreases progressively from north to south until its eastern and western halves become completely separated.
Year of Publication: 2007
Research Program: IODP Integrated Ocean Drilling Program
Key Words: 29 Economic Geology, Energy Sources; Atlantic Ocean; Bathymetry; Cenozoic; Clastic rocks; Compartmentalization; Continental slope; Cores; Erosion; Expedition 308; Geophysical methods; Geophysical profiles; Geophysical surveys; Gulf of Mexico; Integrated Ocean Drilling Program; Levees; Mars-Ursa Basin; Mississippi Canyon; North Atlantic; Northern Gulf of Mexico; Overpressure; Permeability; Petroleum; Pleistocene; Quaternary; Reservoir rocks; Sedimentary rocks; Sedimentation; Sedimentation rates; Seismic methods; Seismic profiles; Southwest Pass Canyon; Surveys; Thickness; Three-dimensional models; Turbidite; Two-dimensional models; Upper Pleistocene; Visualization; Well logs
Coordinates: N280000 N282000 W0890000 W0892000
Record ID: 2007023068
Copyright Information: GeoRef, Copyright 2017 American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States, Reference includes data supplied by American Association of Petroleum Geologists