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Middle Archean continent formation by crustal delamination

2001; Geological Society of America; Volume: 29; Issue: 12 Linguagem: Inglês

10.1130/0091-7613(2001)029 2.0.co;2

1943-2682

Tanja Zegers, Peter E. van Keken,

High-pressure geophysics and materials

Research Article| December 01, 2001 Middle Archean continent formation by crustal delamination Tanja E. Zegers; Tanja E. Zegers 1Department of Geological Sciences, University of Michigan, Ann Arbor, Michigan 48109-1063, USA Search for other works by this author on: GSW Google Scholar Peter E. van Keken Peter E. van Keken 1Department of Geological Sciences, University of Michigan, Ann Arbor, Michigan 48109-1063, USA Search for other works by this author on: GSW Google Scholar Author and Article Information Tanja E. Zegers 1Department of Geological Sciences, University of Michigan, Ann Arbor, Michigan 48109-1063, USA Peter E. van Keken 1Department of Geological Sciences, University of Michigan, Ann Arbor, Michigan 48109-1063, USA Publisher: Geological Society of America Received: 21 Mar 2001 Revision Received: 06 Jul 2001 Accepted: 02 Aug 2001 First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (2001) 29 (12): 1083–1086. https://doi.org/10.1130/0091-7613(2001)029 2.0.CO;2 Article history Received: 21 Mar 2001 Revision Received: 06 Jul 2001 Accepted: 02 Aug 2001 First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Tanja E. Zegers, Peter E. van Keken; Middle Archean continent formation by crustal delamination. Geology 2001;; 29 (12): 1083–1086. doi: https://doi.org/10.1130/0091-7613(2001)029 2.0.CO;2 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 processes that created the first large cratonic areas such as the Pilbara and the Kaapvaal remain poorly understood. Models based on the uniformitarian extrapolation of present-day arc volcanic processes to a hotter early Earth have not adequately explained the observations in these terranes. Here we propose an alternative mechanism for the formation of the earliest continental crust. The formation of continental crust may be achieved by delamination of the lower eclogitic part of an oceanic plateau–like protocrust. Such delamination results in uplift, extension, and the production of tonalite, trondhjemite, and granodiorite (TTG) suites as recorded in Middle Archean cratons. The available geologic and geophysical observations in combination with model calculations permit this scenario as an alternative to subduction-based hypotheses. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.