DOI: 10.1306/03271312072
Scopus记录号: 2-s2.0-84887251735
论文题名: Coeval extension and shortening above and below salt canopies on an uplifted, continental margin: Application to the northern Gulf of Mexico
作者: Dooley T.P. ; Jackson M.P.A. ; Hudec M.R.
刊名: AAPG Bulletin
ISSN: 0149-1650
EISSN: 1558-9380
出版年: 2013
发表日期: 2013
卷: 97, 期: 10 起始页码: 1737
结束页码: 1764
语种: 英语
Scopus关键词: Coastal uplift
; Continental margin
; Continental shelves
; Continental slope
; Gulf of Mexico
; Northern Gulf of Mexico
; Physical model
; Shallow extension
; Models
; Cenozoic
; continental interior
; continental margin
; continental shelf
; exhumation
; fold belt
; folding
; Miocene
; salt
; shelf break
; uplift
; Atlantic Ocean
; Gulf of Mexico
Scopus学科分类: Energy
; Earth and Planetary Sciences
英文摘要: Recent ultradeep exploration in the northern Gulf of Mexico has revealed a broad diffuse zone of salt-cored folding beneath the present continental shelf. This zone is a pillow fold belt, where salt pillows grew halokinetically and were then mildly shortened. Below the Louisiana shelf, a contractional early-to-late Miocene pillow fold belt is separated by a partly welded canopy from an overlying early Miocene-to-Pliocene exten-sional system. This anomalous juxtaposition raises two paradoxes: (1) Why was mid-Miocene shortening close to the Miocene shelf break, where extension is expected? and (2) Why did shortening below the canopy overlap in time with extension above the canopy? Coastal uplift can explain both paradoxes. Cenozoic uplift and exhumation of the north rim of the Gulf of Mexico created the observed coastal offlap and truncation around the rim. Uplift tilted the continental margin and overpowered the influence of the paleoshelf break, causing shortening much farther updip than before uplift. Physical models confirm that this hypothesis is mechanically sound. Our other models had two stacked detachments, each pinned in different locations. Because of this, deep shortening below the canopy was coeval with shallow extension above the canopy. The deep detachment was pinned far inland, equivalent to the uplifted continental interior. Extension above this deep detachment was partly balanced by shortening far downdip to form a pillow fold belt where a network of thrusts linked the squeezed pillows. In contrast, the shallow extensional system above the canopy was pinned farther seaward, equivalent to the upper continental slope. Copyright © 2013, The American Association of Petroleum Geologists. All rights reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84887251735&doi=10.1306%2f03271312072&partnerID=40&md5=7cd4b3996b1a308684ea9564061070fc
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/13220
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:
Dooley T.P.,Jackson M.P.A.,Hudec M.R.. Coeval extension and shortening above and below salt canopies on an uplifted, continental margin: Application to the northern Gulf of Mexico[J]. AAPG Bulletin,2013-01-01,97(10)