Immediate and postevent effects of the K/Pg boundary Chicxulub impact on the northern Gulf of Mexico

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doi: 10.5724/gcs.12.32.0096
Author(s): Scott, Erik; Denne, Richard; Kaiser, James; Eichkoff, David
Author Affiliation(s): Primary:
Marathon Oil, Houston, TX, United States
Volume Title: Papers presented at the 32nd annual GCSSEPM Foundation Bob F. Perkins research conference; New understanding of the petroleum systems of continental margins of the world
Volume Author(s): Rosen, Norman C., editor; Weimer, Paul; Coutes dos Anjos, Sylvia Maria; Henrickson, Sverre; Marques, Edmundo; Mayall, Mike; Fillon, Richard; D'Agostino, Tony; Saller, Art; Campion, Kurt; Huang, Tim; Sarg, Rick; Schroeder, Fred
Source: Papers presented at the Gulf Coast Section, Society of Economic Paleontologists and Mineralogists Foundation Annual Bob F. Perkins Research Conference, Vol.32, p.96-109; 32nd annual GCSSEPM Foundation Bob F. Perkins research conference, Houston, TX, Dec. 2-5, 2012, edited by Norman C. Rosen, Paul Weimer, Sylvia Maria Coutes dos Anjos, Sverre Henrickson, Edmundo Marques, Mike Mayall, Richard Fillon, Tony D'Agostino, Art Saller, Kurt Campion, Tim Huang, Rick Sarg and Fred Schroeder. Publisher: Society of Economic Paleontologists, Gulf Coast Section (GCSSEPM) Foundation, Houston, TX, United States. ISSN: 1544-2462. ISBN: 978-0-9836097-8-0
Note: In English. 4 refs.; illus., incl. strat. col., sects., block diag.
Summary: The Chicxulub bolide impact on the Yucatan peninsula at the Cretaceous-Paleogene (K/Pg) boundary has been postulated as the trigger that remobilized sediment into mass transport flows on the submerged shelf along eastern North and Central America as well as around the Gulf of Mexico and redistributed sediment out into the deep water Atlantic, Caribbean, and Gulf of Mexico. Well log and biostratigraphic data from Cretaceous well penetrations in the deep-water northern Gulf of Mexico show a distinctive micritic deposit at the K/Pg boundary that is similar in composition and biostratigraphy to sediments found near the Chicxulub crater, DSDP/ODP cores, and outcrops in Cuba. Investigation of seismic data in the northern Gulf of Mexico shows anomalous sedimentary wedges of high amplitude reflectors situated at the top of the Cretaceous section that are interpreted to be the resulting deposit from the mass transport flows and suspension fallout initiated by the impact. At the end of the Cretaceous, the northern Gulf of Mexico was undergoing allocthonous salt movement from the Jurassic Louann Salt that was expressed in numerous salt highs defining potential clastic sediment fairways. The sediment redistribution caused by the Chicxulub impact filled in the available accommodation space around the salt highs, as well as depositing on the highs themselves, and altered the seafloor topography across the northern Gulf of Mexico. This resulted in an efficient transportation pathway from shelf to deep water and influenced the sedimentation patterns of the subsequent sediment gravity flows of the Wilcox Formation.
Year of Publication: 2012
Key Words: 12 Stratigraphy, Historical Geology and Paleoecology; Alaminos Canyon; Antilles; Atlantic Ocean; Cacarajicara Formation; Caribbean region; Cenozoic; Chemically precipitated rocks; Chicxulub Crater; Cretaceous; Cuba; Deep-water environment; Ejecta; Eocene; Evaporites; Geophysical methods; Geophysical profiles; Geophysical surveys; Gravity flows; Greater Antilles; Gulf of Mexico; Impact features; K-T boundary; Keathly Canyon; Lower Paleocene; Mass movements; Mesozoic; Moncada Formation; North Atlantic; Paleocene; Paleogene; Paleoseismicity; Paleotsunamis; Penalver Formation; Salt; Salt tectonics; Sedimentary rocks; Sedimentation; Seismic methods; Seismic profiles; Siliciclastics; Stratigraphic boundary; Surveys; Tectonics; Tertiary; Upper Cretaceous; Well logs; West Indies; Wilcox Group; Yucatan Peninsula
Coordinates: N180000 N300400 W0803000 W0980000
N194000 N213900 W0873000 W0902200
Record ID: 2017003515
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