globalchange  > 影响、适应和脆弱性
DOI: 10.1016/j.epsl.2018.04.012
Scopus记录号: 2-s2.0-85045569114
论文题名:
A low-angle detachment fault revealed: Three-dimensional images of the S-reflector fault zone along the Galicia passive margin
作者: Schuba C.N.; Gray G.G.; Morgan J.K.; Sawyer D.S.; Shillington D.J.; Reston T.J.; Bull J.M.; Jordan B.E.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2018
卷: 492
起始页码: 232
结束页码: 238
语种: 英语
英文关键词: continent–ocean transition zone ; detachment faults ; fault rock production ; fault surface morphology ; Galicia margin ; rifting
Scopus关键词: Reflection ; Rocks ; Seismic waves ; Seismology ; Detachment fault ; Fault rock ; Fault surfaces ; Galicia ; rifting ; Transition zones ; Fault slips ; detachment fault ; fault zone ; ocean-continent transition ; passive margin ; rifting ; seismic reflection ; Galicia [Spain] ; Spain
英文摘要: A new 3-D seismic reflection volume over the Galicia margin continent–ocean transition zone provides an unprecedented view of the prominent S-reflector detachment fault that underlies the outer part of the margin. This volume images the fault's structure from breakaway to termination. The filtered time-structure map of the S-reflector shows coherent corrugations parallel to the expected paleo-extension directions with an average azimuth of 107°. These corrugations maintain their orientations, wavelengths and amplitudes where overlying faults sole into the S-reflector, suggesting that the parts of the detachment fault containing multiple crustal blocks may have slipped as discrete units during its late stages. Another interface above the S-reflector, here named S′, is identified and interpreted as the upper boundary of the fault zone associated with the detachment fault. This layer, named the S-interval, thickens by tens of meters from SE to NW in the direction of transport. Localized thick accumulations also occur near overlying fault intersections, suggesting either non-uniform fault rock production, or redistribution of fault rock during slip. These observations have important implications for understanding how detachment faults form and evolve over time. 3-D seismic reflection imaging has enabled unique insights into fault slip history, fault rock production and redistribution. © 2018 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109900
Appears in Collections:影响、适应和脆弱性
气候变化事实与影响

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作者单位: Department of Earth, Environmental and Planetary Sciences, Rice University, MS-126, Main Street, Houston, TX 77005, United States; Lamont-Doherty Earth Observatory, Columbia University, 61 Route 9W, PO Box 1000, Palisades, NY 10964-8000, United States; School of Geography, Earth and Environmental Sciences, University of Birmingham, Edgbaston, Birmingham, B15 2TT, United Kingdom; National Oceanography Centre Southampton, University of Southampton, Southampton, S014 3ZH, United Kingdom; BP America Inc., 501 WestLake Park Blvd., 23.126C, Houston, TX 77079, United States

Recommended Citation:
Schuba C.N.,Gray G.G.,Morgan J.K.,et al. A low-angle detachment fault revealed: Three-dimensional images of the S-reflector fault zone along the Galicia passive margin[J]. Earth and Planetary Science Letters,2018-01-01,492
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