DOI: 10.1306/12090909116
Scopus记录号: 2-s2.0-77955063280
论文题名: Interaction between prerift salt and detachment faulting in hyperextended rift systems: The example of the Parentis and Mauléon basins (Bay of Biscay and western Pyrenees)
作者: Jammes S. ; Manatschal G. ; Lavier L.
刊名: AAPG Bulletin
ISSN: 0149-1924
EISSN: 1558-9654
出版年: 2010
发表日期: 2010
卷: 94, 期: 7 起始页码: 957
结束页码: 975
语种: 英语
Scopus关键词: Allochthons
; Bay of Biscay
; Crustal detachment
; Crustal rocks
; Crustal thinning
; Cut-through
; Deformation modes
; Detachment fault
; Detachment faulting
; Field observations
; Initial stages
; New model
; Pyrenees
; Rift systems
; Salt layers
; Salt tectonics
; Sea floor
; Sedimentary units
; Seismic datas
; Seismic image
; Buildings
; Fuzzy control
; Ocean structures
; Ore deposit geology
; Seismic waves
; Tectonics
; Seismology
; allochthon
; crustal thinning
; deformation
; detachment fault
; drilling
; exhumation
; faulting
; field method
; rift zone
; rifting
; salt tectonics
; seafloor
; seismic data
; Atlantic Ocean
; Bay of Biscay
; Pyrenees
Scopus学科分类: Energy
; Earth and Planetary Sciences
英文摘要: Prerift salt layers associated with extensional detachment faults exhuming mantle and deeper crustal rocks at the sea floor are observed in the Parentis and Arzacq-Mauleon basins located at the eastern termination of the Bay of Biscay. How detachment faults interact with salt in hyperextended rift systems is yet little understood. Based on field observations and drill-hole and seismic data, we propose a new model to explain the interaction between salt tectonics and extensional detachment systems. We demonstrate that the presence of a thick prerift salt layer in an area undergoing extreme crustal thinning can control the geometry and evolution of rift systems and obscure the rift-related structures in the underlying basement. During an initial stage of rifting, prerift salt layers act as a decoupling horizon between sub- and suprasalt units and hinder crustal detachment faults to cut through the salt layers and form breakaways at the sea floor. As a consequence, they sole out along the ductile salt layer and no sub-salt material can be exhumed to the sea floor. Thus, sub- and suprasalt layers deform by different deformation modes, which makes that detachment fault difficult to identify on seismic images. In a later stage, when salt has migrated and thinned out, sub- and suprasalt layers can locally couple and detachment faults can be exposed at the surface, resulting in windows of exhumed basement surrounded by extensional allochthons formed by suprasalt sedimentary units. Copyright ©2010. the American Association of Petroleum Geologists.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-77955063280&doi=10.1306%2f12090909116&partnerID=40&md5=0317398252284945607dcc5c8b760d4e
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/13493
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
There are no files associated with this item.
Recommended Citation:
Jammes S.,Manatschal G.,Lavier L.. Interaction between prerift salt and detachment faulting in hyperextended rift systems: The example of the Parentis and Mauléon basins (Bay of Biscay and western Pyrenees)[J]. AAPG Bulletin,2010-01-01,94(7)