| DOI: | 10.1306/10270909055
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| Scopus记录号: | 2-s2.0-79951546093
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| 论文题名: | Seismic geomorphohgy of offshore Morocco's east margin, Safi Haute Mer area |
| 作者: | Dunlap D.B.; Wood L.J.; Weisenberger C.; Jabour H.
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| 刊名: | AAPG Bulletin
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| ISSN: | 0149-1936
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| EISSN: | 1558-9666
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| 出版年: | 2010
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| 发表日期: | 2010
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| 卷: | 94, 期:5 | | 起始页码: | 615
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| 结束页码: | 642
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| 语种: | 英语
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| Scopus关键词: | Continental slope
; Debris flows
; Diapirism
; Holocenes
; Jurassic
; Offshore Morocco
; Regional tectonics
; Sea floor
; Sediment waves
; Seismic surveys
; Toe thrusts
; Triassic
; West coast
; Anoxic sediments
; Debris
; Sedimentology
; Seismology
; Stratigraphy
; Salt tectonics
; continental slope
; debris flow
; episodic event
; facies
; geomorphological mapping
; geomorphological response
; Holocene
; Jurassic
; mass transport
; mobilization
; seafloor
; seismic stratigraphy
; seismic survey
; Triassic
; Doukkala-Abda
; Morocco
; Safi
|
| Scopus学科分类: | Energy
; Earth and Planetary Sciences
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| 英文摘要: | The lower continental slope of Morocco's west coast consists of Triassic-age salt manifested in the form of diapirs, tongues, sheets, canopies, and toe thrusts. Active salt diapirism and regional tectonics greatly influence the morphology of the modern sea floor, forming a severely rugose expression with ongoing minibasin development and episodic submarine failure. Detailed mapping of a 1064-km2 (411 -mi2) seismic survey acquired in the Safi Haute Mer area revealed that Jurassic to Holocene salt mobilization continually affected distribution of sediment, causing a range of depositional flow styles, from slumps to sheet slides and mass-transport complexes (MTCs). Large sediment waves (20 km [12 mi] long, 1.5-km [0.9-mi] wavelength) were also documented at the end of the Aptian. An east-west-trending structural anticline downdip of the salt activated during initiation of the Atlas uplift in the latest Cretaceous to earliest Tertiary and shaped much of the lower slope into the Tertiary with a persistent canyon system and slope channels. The largest of the debris flows is a Cretaceous-age MTC, a 500-m (1640-ft)thick flow that spans an area of up to 20,000 km2 (7722 mi2). Composing the MTC are (1) chaotic, mounded seismic faciès; (2) internal syndepositional thrusts; and (3) transported megablocks (3.3 km2 [1.3 mi 2]) witb preserved internal stratigraphy. The MTC originated from an upslope collapse of a narrow shelf during the earliest phases of the Alpine orogeny. Copyright ©2010. The American Assotiation of Petroleum Geologists. All rights reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-79951546093&doi=10.1306%2f10270909055&partnerID=40&md5=d36463ecd21b1d13bc00d82307d1d598
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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/13505
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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: | |
Dunlap D.B.,Wood L.J.,Weisenberger C.,et al. Seismic geomorphohgy of offshore Morocco's east margin, Safi Haute Mer area[J]. AAPG Bulletin,2010-01-01,94(5)
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