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Internal structure, kinematics, and growth of a salt wall: Insights from 3-D seismic data

2014; Geological Society of America; Volume: 42; Issue: 4 Linguagem: Inglês

10.1130/g34865.1

1943-2682

Christopher Jackson, Martin P. A. Jackson, Michael R. Hudec, Clara Rodriguez,

Methane Hydrates and Related Phenomena

Research Article| April 01, 2014 Internal structure, kinematics, and growth of a salt wall: Insights from 3-D seismic data Christopher A-L. Jackson; Christopher A-L. Jackson * 1Bureau of Economic Geology, Jackson School of Geoscience, University of Texas at Austin, University Station, Box X, Austin, Texas 78713, USA *Current address: Basins Research Group (BRG), Department of Earth Science and Engineering, Imperial College, London SW7 2BP, UK; E-mail: c.jackson@imperial.ac.uk. Search for other works by this author on: GSW Google Scholar Martin P.A. Jackson; Martin P.A. Jackson 1Bureau of Economic Geology, Jackson School of Geoscience, University of Texas at Austin, University Station, Box X, Austin, Texas 78713, USA Search for other works by this author on: GSW Google Scholar Michael R. Hudec; Michael R. Hudec 1Bureau of Economic Geology, Jackson School of Geoscience, University of Texas at Austin, University Station, Box X, Austin, Texas 78713, USA Search for other works by this author on: GSW Google Scholar Clara Rodriguez Clara Rodriguez 2Basins Research Group (BRG), Department of Earth Science and Engineering, Imperial College, London SW7 2BP, UK Search for other works by this author on: GSW Google Scholar Geology (2014) 42 (4): 307–310. https://doi.org/10.1130/G34865.1 Article history received: 22 Jun 2013 rev-recd: 07 Jan 2014 accepted: 09 Jan 2014 first online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Christopher A-L. Jackson, Martin P.A. Jackson, Michael R. Hudec, Clara Rodriguez; Internal structure, kinematics, and growth of a salt wall: Insights from 3-D seismic data. Geology 2014;; 42 (4): 307–310. doi: https://doi.org/10.1130/G34865.1 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract The detailed kinematics of natural salt walls remain elusive because such structures are typically poorly exposed at outcrop, only partly exposed in mine workings, and diapiric salt is typically poorly reflective in seismic data. We use three-dimensional seismic and borehole data from offshore Brazil to investigate how structural styles vary along strike within a spectacularly well-imaged salt wall. Deformed layering in the salt allows us to map complex, seismic-scale structures in the wall; within the wall's relatively simple external shape is a range of previously undocumented structural styles produced by: (1) initial upwelling and formation of a wall-parallel anticline due to regional extension and differential overburden load, (2) breaching of the anticline, Rayleigh-Taylor overturn, and emplacement of an intrasalt allochthonous sheet driven by a density inversion, and (3) internal thrusting of the mature diapir caused by regional compression. This study is arguably the first detailed documentation of the internal structure and kinematics of a natural salt wall, highlighting the presence of abruptly varying intrasalt structural styles. The structures identified and the inferred kinematics suggest that, given specific mechanical stratigraphy, density-driven overturn within salt diapirs can play a key role in their growth. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.