| DOI: | 10.1306/01271109141
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| Scopus记录号: | 2-s2.0-80053428676
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| 论文题名: | Pleistocene shelf-margin delta: Intradeltaic deformation and sediment bypass, northern Gulf of Mexico |
| 作者: | Perov G.; Bhattacharya J.P.
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| 刊名: | AAPG Bulletin
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| ISSN: | 0149-1831
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| EISSN: | 1558-9561
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| 出版年: | 2011
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| 发表日期: | 2011
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| 卷: | 95, 期:9 | | 起始页码: | 1617
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| 结束页码: | 1641
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| 语种: | 英语
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| Scopus关键词: | 3D seismic data
; Deepwater
; Deformation feature
; Deltaic deposits
; Depositional environment
; Distributary channels
; Eustatic sea level
; Facies architecture
; Forced regression
; Growth fault
; Gulf of Mexico
; Louisiana
; Mud wedge
; Northern Gulf of Mexico
; Oxygen isotopes
; Pleistocene
; Point sources
; Progradation
; Reservoir heterogeneity
; Salt domes
; Seismic interpretation
; Shallow-water
; Submarine slopes
; Anoxic sediments
; Deformation
; Deposits
; Domes
; Isotopes
; Lithology
; Petroleum reservoir evaluation
; Reservoirs (water)
; Salt deposits
; Sea level
; Sedimentology
; Seismology
; Stratigraphy
; Submarines
; Three dimensional
; Waterworks
; Salt tectonics
; continental shelf
; deep water
; deformation
; delta
; eustacy
; geomorphological mapping
; growth fault
; heterogeneity
; lithology
; oxygen isotope
; Pleistocene
; point source
; progradation
; salt dome
; salt tectonics
; sediment transport
; seismic data
; sequence stratigraphy
; transgression
; Atlantic Ocean
; Gulf of Mexico
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| Scopus学科分类: | Energy
; Earth and Planetary Sciences
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| 英文摘要: | Recent studies of shelf-margin deltas in the Gulf of Mexico lack three-dimensional (3-D) seismic interpretation that allows prediction of lithology distribution, deformation features, and overall reservoir heterogeneity, and only a few 3-D studies of shelf-margin deltas in other parts of the world exist. This paper examines the 3-D geomorphology and internal facies architecture within a sequence-stratigraphic framework of a shelf-margin delta in a salt dome minibasin, within the Gulf of Mexico, offshore Louisiana, using 3-D seismic data. The 3-D data also allow an evaluation of the potential pathways for sediment bypass from delta front to slope and deep-water depositional environments. The delta consists of a series of offlapping sandy clinoforms, interpreted as being associated with a prolonged forced regression and ensuing lowstand of eustatic sea level, related to oxygen isotope stage 6, which lasted for about 45 k.y. The lowstand delta is onlapped by a transgressive mud wedge and is underlain and capped by regionally persistent highstand mud-stones. The central part of the delta shows intradeltaic syn-depositional growth faults, likely triggered by deposition of heavy delta-front sands over mobile prodeltaic muds, reflecting the river-dominated nature of the delta. A postdepositional shallow-water mass transport complex (MTC], which moved almost perpendicular to the direction of the regional delta progradation, remobilizes the deltaic deposits. The MTC was likely induced by uplift of the adjacent western salt dome. We hypothesize that the high degree of syndepositional and postdepositional deformation is related to the prolonged nature of the eustatic lowstand, as well as the salt tectonics. Tributive submarine slope channels form downdip of the delta front and many also reflect incision during the prolonged eusatic lowstand. The salt tectonics caused focusing of the dispersed delta-front sediments, mostly originating from terminal distributary channels, into the convergent tributive slope-channel system. Although this is an unstable supply-dominated shelf-margin delta, the salt tectonics likely prevented sediments effectively into a point source for delivery to deep-water systems. This contrasts with less confined high-sediment supply delta systems farther along the coast, which lack linked submarine deposits because they reach the shelf margin before maxium eustatic lowstand and avulse before building significant deep-water systems. © 2011. The American Association of Petroleum Geologists. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-80053428676&doi=10.1306%2f01271109141&partnerID=40&md5=aeb408c54402413a2756e884f9b29eae
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/13400
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| Appears in Collections: | 过去全球变化的重建
影响、适应和脆弱性
科学计划与规划
气候变化与战略
全球变化的国际研究计划
气候减缓与适应
气候变化事实与影响
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| Recommended Citation: | |
Perov G.,Bhattacharya J.P.. Pleistocene shelf-margin delta: Intradeltaic deformation and sediment bypass, northern Gulf of Mexico[J]. AAPG Bulletin,2011-01-01,95(9)
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