Matches in SemOpenAlex for { <https://semopenalex.org/work/W1996309144> ?p ?o ?g. }
- W1996309144 endingPage "278" @default.
- W1996309144 startingPage "265" @default.
- W1996309144 abstract "Research Article| September 01, 2006 The Broodkop shear zone, southeast Vredefort dome (South Africa): a Dominion-related extensional feature? Cristiano Lana; Cristiano Lana Impact Cratering Research Group, School of Geosciences, University of the Witwatersrand, Private Bag 3, P.O. Wits 2050, Johannesburg, South Africa, Impacts and Astromaterials Research Centre, Imperial College London, Royal School of Mines, South Kensington Campus, United Kingdom, SW7 2AZ, e-mail: c.lana@imperial.ac.uk Search for other works by this author on: GSW Google Scholar Roger L. Gibson; Roger L. Gibson Impact Cratering Research Group, School of Geosciences, University of the Witwatersrand, Private Bag 3, P.O. Wits 2050, Johannesburg, South Africa, e-mail: gibsonr@geosciences.wits.ac.za Search for other works by this author on: GSW Google Scholar Wolf Uwe Reimold Wolf Uwe Reimold Impact Cratering Research Group, School of Geosciences, University of the Witwatersrand, Private Bag 3, P.O. Wits 2050, Johannesburg, South Africa Museum für Naturkunde, Humboldt University, Invalidenstrasse 43, 10115 Berlin, e-mail: uwe.reimold@museum.hu-berlin.de Search for other works by this author on: GSW Google Scholar Author and Article Information Cristiano Lana Impact Cratering Research Group, School of Geosciences, University of the Witwatersrand, Private Bag 3, P.O. Wits 2050, Johannesburg, South Africa, Impacts and Astromaterials Research Centre, Imperial College London, Royal School of Mines, South Kensington Campus, United Kingdom, SW7 2AZ, e-mail: c.lana@imperial.ac.uk Roger L. Gibson Impact Cratering Research Group, School of Geosciences, University of the Witwatersrand, Private Bag 3, P.O. Wits 2050, Johannesburg, South Africa, e-mail: gibsonr@geosciences.wits.ac.za Wolf Uwe Reimold Impact Cratering Research Group, School of Geosciences, University of the Witwatersrand, Private Bag 3, P.O. Wits 2050, Johannesburg, South Africa Museum für Naturkunde, Humboldt University, Invalidenstrasse 43, 10115 Berlin, e-mail: uwe.reimold@museum.hu-berlin.de Publisher: Geological Society of South Africa First Online: 09 Mar 2017 Online ISSN: 1996-8590 Print ISSN: 1012-0750 © 2006 Geological Society of South Africa South African Journal of Geology (2006) 109 (3): 265–278. https://doi.org/10.2113/gssajg.109.3.265 Article history 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 Cristiano Lana, Roger L. Gibson, Wolf Uwe Reimold; The Broodkop shear zone, southeast Vredefort dome (South Africa): a Dominion-related extensional feature?. South African Journal of Geology 2006;; 109 (3): 265–278. doi: https://doi.org/10.2113/gssajg.109.3.265 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 SocietySouth African Journal of Geology Search Advanced Search Abstract The Broodkop shear zone is an approximately 1 km-wide, vertical, northeasterly-trending, mylonitic shear zone that separates upper amphibolite- to granulite-facies gneisses (≥670°C, 4.5 to 5.5 kbar) from mid-greenschist-facies (~400°C) greenstones in the southeastern part of the Vredefort dome. The mylonitic fabric transposes 3.09 to 3.08 Ga peak-metamorphic migmatitic structures but shows progressive overprinting of shear-related amphibolite-facies assemblages by greenschist-facies assemblages; indicating initiation of deformation close to the metamorphic peak and continued shearing during cooling. Shear-sense indicators are consistent with southeastern-side-up dip-slip movement. Removal of Late Archaean and Proterozoic rotation effects, particularly those associated with formation of the Vredefort dome, suggests that the shear zone formed as a shallowly northwesterly-dipping extensional feature associated with exhumation of the mid-crustal amphibolite-to-granulite-facies footwall rocks and transport of the greenschist-facies hanging wall rocks to the northwest. Several kilometres of throw along the shear zone is suggested by the juxtaposition of rocks with markedly different metamorphic grades. Assuming an initial shallow dip for the shear zone, this suggests in excess of 10 km of dip-slip movement, making the Broodkop shear zone a crustal-scale feature. The timing and geometry of the shear zone suggest that it may represent a mid-crustal manifestation of the rifting event that led to the deposition of bimodal volcanics and associated sediments of the 3074 ± 6 Ma Dominion Group. The Broodkop shear zone provides an appropriate mechanism to explain how these volcanics could be deposited unconformably on mid-crustal gneisses within only a few million years of the high-grade metamorphism. It provides a link between the final major pulse of greenstone-TTG formation in the core of the Vredefort dome and the initiation of a series of large sedimentary and volcanic basins that dominated the Late Archaean history of the Kaapvaal craton. You do not have access to this content, please speak to your institutional administrator if you feel you should have access." @default.
- W1996309144 created "2016-06-24" @default.
- W1996309144 creator A5026677062 @default.
- W1996309144 creator A5076871437 @default.
- W1996309144 creator A5081415011 @default.
- W1996309144 date "2006-09-01" @default.
- W1996309144 modified "2023-09-26" @default.
- W1996309144 title "The Broodkop shear zone, southeast Vredefort dome (South Africa): a Dominion-related extensional feature?" @default.
- W1996309144 cites W1963891757 @default.
- W1996309144 cites W1967272289 @default.
- W1996309144 cites W1967438097 @default.
- W1996309144 cites W1968324213 @default.
- W1996309144 cites W1969846781 @default.
- W1996309144 cites W1970982932 @default.
- W1996309144 cites W1976016997 @default.
- W1996309144 cites W1978729063 @default.
- W1996309144 cites W1979024345 @default.
- W1996309144 cites W1979499932 @default.
- W1996309144 cites W1987699349 @default.
- W1996309144 cites W1988895687 @default.
- W1996309144 cites W1993884032 @default.
- W1996309144 cites W1996156668 @default.
- W1996309144 cites W1999244570 @default.
- W1996309144 cites W2004935918 @default.
- W1996309144 cites W2007863288 @default.
- W1996309144 cites W2009617051 @default.
- W1996309144 cites W2017820929 @default.
- W1996309144 cites W2017968220 @default.
- W1996309144 cites W2023130537 @default.
- W1996309144 cites W2027383858 @default.
- W1996309144 cites W2035576698 @default.
- W1996309144 cites W2039480109 @default.
- W1996309144 cites W2048813624 @default.
- W1996309144 cites W2069108358 @default.
- W1996309144 cites W2071704103 @default.
- W1996309144 cites W2075740329 @default.
- W1996309144 cites W2077692593 @default.
- W1996309144 cites W2078388543 @default.
- W1996309144 cites W2080995558 @default.
- W1996309144 cites W2087483398 @default.
- W1996309144 cites W2092342466 @default.
- W1996309144 cites W2092497959 @default.
- W1996309144 cites W2097240991 @default.
- W1996309144 cites W2104220278 @default.
- W1996309144 cites W2108553231 @default.
- W1996309144 cites W2115951676 @default.
- W1996309144 cites W2122251385 @default.
- W1996309144 cites W2124474119 @default.
- W1996309144 cites W2126252781 @default.
- W1996309144 cites W2142614501 @default.
- W1996309144 cites W2163644653 @default.
- W1996309144 cites W2165093416 @default.
- W1996309144 cites W2288807821 @default.
- W1996309144 cites W2503564995 @default.
- W1996309144 cites W2523360770 @default.
- W1996309144 cites W2919367446 @default.
- W1996309144 doi "https://doi.org/10.2113/gssajg.109.3.265" @default.
- W1996309144 hasPublicationYear "2006" @default.
- W1996309144 type Work @default.
- W1996309144 sameAs 1996309144 @default.
- W1996309144 citedByCount "12" @default.
- W1996309144 countsByYear W19963091442012 @default.
- W1996309144 countsByYear W19963091442013 @default.
- W1996309144 countsByYear W19963091442019 @default.
- W1996309144 countsByYear W19963091442020 @default.
- W1996309144 crossrefType "journal-article" @default.
- W1996309144 hasAuthorship W1996309144A5026677062 @default.
- W1996309144 hasAuthorship W1996309144A5076871437 @default.
- W1996309144 hasAuthorship W1996309144A5081415011 @default.
- W1996309144 hasConcept C114793014 @default.
- W1996309144 hasConcept C121332964 @default.
- W1996309144 hasConcept C127313418 @default.
- W1996309144 hasConcept C1276947 @default.
- W1996309144 hasConcept C136137745 @default.
- W1996309144 hasConcept C13801280 @default.
- W1996309144 hasConcept C151730666 @default.
- W1996309144 hasConcept C161191863 @default.
- W1996309144 hasConcept C166957645 @default.
- W1996309144 hasConcept C179537507 @default.
- W1996309144 hasConcept C189092281 @default.
- W1996309144 hasConcept C205649164 @default.
- W1996309144 hasConcept C2778787019 @default.
- W1996309144 hasConcept C41008148 @default.
- W1996309144 hasConcept C77928131 @default.
- W1996309144 hasConceptScore W1996309144C114793014 @default.
- W1996309144 hasConceptScore W1996309144C121332964 @default.
- W1996309144 hasConceptScore W1996309144C127313418 @default.
- W1996309144 hasConceptScore W1996309144C1276947 @default.
- W1996309144 hasConceptScore W1996309144C136137745 @default.
- W1996309144 hasConceptScore W1996309144C13801280 @default.
- W1996309144 hasConceptScore W1996309144C151730666 @default.
- W1996309144 hasConceptScore W1996309144C161191863 @default.
- W1996309144 hasConceptScore W1996309144C166957645 @default.
- W1996309144 hasConceptScore W1996309144C179537507 @default.
- W1996309144 hasConceptScore W1996309144C189092281 @default.
- W1996309144 hasConceptScore W1996309144C205649164 @default.
- W1996309144 hasConceptScore W1996309144C2778787019 @default.
- W1996309144 hasConceptScore W1996309144C41008148 @default.