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Accretionary history of the Archean Barberton Greenstone Belt (3.55-3.22 Ga), southern Africa

1994; Geological Society of America; Volume: 22; Issue: 12 Linguagem: Inglês

10.1130/0091-7613(1994)022 2.3.co;2

1943-2682

Donald R. Lowe,

Geological formations and processes

Research Article| December 01, 1994 Accretionary history of the Archean Barberton Greenstone Belt (3.55-3.22 Ga), southern Africa Donald R. Lowe Donald R. Lowe 1Department of Geological and Environmental Sciences, Stanford University, Stanford, California 94305-2115 Search for other works by this author on: GSW Google Scholar Author and Article Information Donald R. Lowe 1Department of Geological and Environmental Sciences, Stanford University, Stanford, California 94305-2115 Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1994) 22 (12): 1099–1102. https://doi.org/10.1130/0091-7613(1994)022 2.3.CO;2 Article history First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Donald R. Lowe; Accretionary history of the Archean Barberton Greenstone Belt (3.55-3.22 Ga), southern Africa. Geology 1994;; 22 (12): 1099–1102. doi: https://doi.org/10.1130/0091-7613(1994)022 2.3.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 3.55-3.22 Ga Barberton Greenstone Belt, South Africa and Swaziland, and surrounding coeval plutons can be divided into four tectono-stratigraphic blocks that become younger toward the north west. Each block formed through early mafic to ultramafic volcanism (Onverwacht Group), probably in oceanic extensional, island, or plateau settings. Volcanism was followed by magmatic quiescence and deposition of fine-grained sediments, possibly in an intraplate setting. Late evolution involved underplating of the mafic rust by tonalitic intrusions along a subduction-related magmatic arc, yielding a thickened, buoyant protocontinental block. The growth of larger continental domains occurred both through magmatic accretion, as new protocontinental blocks developed along the margins of older blocks, and when previously separate blocks were amalgamated through tectonic accretion. Evolution of the Barber-ton Belt may reflect an Early Archean plate tectonic cycle that characterized a world with few or no large, stabilized blocks of sialic crust. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.