DOI: 10.1306/10081414003
Scopus记录号: 2-s2.0-84927153475
论文题名: Influence of mobile shale on thrust faults: Insights from discrete element simulations
作者: Dean S. ; Morgan J. ; Brandenburg J.P.
刊名: AAPG Bulletin
ISSN: 0149-1505
EISSN: 1558-9235
出版年: 2015
发表日期: 2015
卷: 99, 期: 3 起始页码: 403
结束页码: 432
语种: 英语
Scopus关键词: Shale
; Tectonics
; Discrete element modeling
; Discrete element simulation
; Fold-and-thrust belts
; Maximum principal stress
; Sediment wedge
; Seismic interpretation
; Shale tectonics
; Stress and strain
; Faulting
; discrete element method
; fault
; shale
; simulation
; stress-strain relationship
; tectonics
; two-dimensional modeling
; Niger Delta
; Nigeria
Scopus学科分类: Energy
; Earth and Planetary Sciences
英文摘要: We study the effects of sedimentary loading of a mobile shale substrate, using two-dimensional discrete element modeling. We develop an updip extensional zone connected at depth to a down-dip contractional zone, allowing us to study the formation of gravity-driven fold and thrust belts, and the evolution of décollements within this system. We compare our models to the Niger Delta type locale for shale tectonics. In general, most seismic interpretations of the Niger Delta include décollement(s) at the top of the mobile shale unit, but exact locations vary depending on area of investigation. Our models, particularly ones with mobile shale thicker than 2 km (1.2 mi), show more diffuse décollements, spanning the width of the mobile shale unit, which propagate out in front of the syntectonic sediment wedge and connect normal faults in the extensional zone with toe thrusts in the contractional zone. We also look at the distributions of stress and strain within our models, plotting the distributions of σ1 (maximum principal stress) and relating that to the vergence of thrust faults developed in our models. We quantify the amount of strain in different sections of the models, showing that extension is much greater than compression in the fold and thrust belt(s) alone, and that compression is distributed throughout the model, including in front of the fold and thrust belt. Copyright © 2015. The American Association of Petroleum Geologists. All rights reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84927153475&doi=10.1306%2f10081414003&partnerID=40&md5=579d0d6abc8c5605cb068244ef1c8af4
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/13076
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:
Dean S.,Morgan J.,Brandenburg J.P.. Influence of mobile shale on thrust faults: Insights from discrete element simulations[J]. AAPG Bulletin,2015-01-01,99(3)