DOI: 10.1306/09271010060
Scopus记录号: 2-s2.0-80051491993
论文题名: Structural geometry and evolution of releasing and restraining bends: Insights from laser-scanned experimental models
作者: Mitra S. ; Paul D.
刊名: AAPG Bulletin
ISSN: 0149-1846
EISSN: 1558-9576
出版年: 2011
发表日期: 2011
卷: 95, 期: 7 起始页码: 1147
结束页码: 1180
语种: 英语
Scopus关键词: Basin-bounding faults
; Experimental modeling
; Experimental models
; Fault geometry
; Fault patterns
; Laser scanning
; Normal faults
; Relative positions
; Reverse faults
; S-shaped
; Slip distribution
; Step down
; Strike-slip fault
; Structural geometry
; Structural setting
; Subsurface structures
; Aspect ratio
; Geometry
; basin evolution
; displacement
; experimental study
; fault
; geometry
; numerical model
; scanning electron microscopy
; slip
; strike-slip fault
; uplift
Scopus学科分类: Energy
; Earth and Planetary Sciences
英文摘要: Experimental modeling is used to study the geometry and evolution of structures and related secondary faults along releasing bends and offsets and restraining bends on strike-slip faults. The controls of the relative positions of adjacent strikeslip faults on the geometry of the structures and the difference in geometries between bends and offsets are investigated. A new method of laser scanning is used to map the geometry and evolution of the structures and related faults. The models show that oblique releasing bends connecting approaching faults result in spindle-shaped basins, whereas transverse bends result in more S-shaped or rhomboidal basins. Offsets result in the distribution of strain over a wider area and a larger number of faults compared with preexisting bends, which result in fewer well-defined basin-bounding faults. Secondary faults include R, R', and Y Riedel shears near the main strikeslip faults and oblique normal faults in the center of the basin. Fault patterns exhibit en echelon geometries with a progressive step down into the deepest parts of the basin. Symmetric, asymmetric, and double basins may form in any of the structural settings, depending on the slip distribution among faults on the basin margins. For restraining bends, oblique (45°) bends connecting approaching faults result in spindle-shaped uplifts, whereas transverse or oblique (135°) bends connecting overlapping faults result in more rhomboidal or rectangular uplifts. The fold trends are at increasingly higher angles with the strike faults for transverse and oblique (135°) bends. Secondary faults include en echelon reverse faults, which typically form along the steep limbs of asymmetric uplifts, normal faults, which are transverse or oblique to the axis of the structure, and R, R', and Y Riedel shears near the main strikeslip faults. The aspect ratios of the basins and uplifts increase with increasing displacement on the strike-slip faults. The results of these models can be used to interpret the structural and fault geometries in surface and subsurface structures formed along strike-slip faults. Copyright © 2011. The American Association of Petroleum Geologists. All rights reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-80051491993&doi=10.1306%2f09271010060&partnerID=40&md5=90267eda41e4ca7575a151a26c02ff67
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/13415
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:
Mitra S.,Paul D.. Structural geometry and evolution of releasing and restraining bends: Insights from laser-scanned experimental models[J]. AAPG Bulletin,2011-01-01,95(7)