Are oceanic plateaus sites of komatiite formation?

Research Article| April 01, 1991 Are oceanic plateaus sites of komatiite formation? M. Storey; M. Storey 1Department of Geology, University of Keele, Staffordshire STF 5BH, England Search for other works by this author on: GSW Google Scholar J. J. Mahoney; J. J. Mahoney 2School of Ocean and Earth Science and Technology, University of Hawaii, 2525 Correa Road, Honolulu, Hawaii 96822 Search for other works by this author on: GSW Google Scholar L. W. Kroenke; L. W. Kroenke 2School of Ocean and Earth Science and Technology, University of Hawaii, 2525 Correa Road, Honolulu, Hawaii 96822 Search for other works by this author on: GSW Google Scholar A. D. Saunders A. D. Saunders 3Department of Geology, University of Leicester, University Road, Leicester LE1 7RH, England Search for other works by this author on: GSW Google Scholar Author and Article Information M. Storey 1Department of Geology, University of Keele, Staffordshire STF 5BH, England J. J. Mahoney 2School of Ocean and Earth Science and Technology, University of Hawaii, 2525 Correa Road, Honolulu, Hawaii 96822 L. W. Kroenke 2School of Ocean and Earth Science and Technology, University of Hawaii, 2525 Correa Road, Honolulu, Hawaii 96822 A. D. Saunders 3Department of Geology, University of Leicester, University Road, Leicester LE1 7RH, England Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1991) 19 (4): 376–379. https://doi.org/10.1130/0091-7613(1991)019<0376:AOPSOK>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 M. Storey, J. J. Mahoney, L. W. Kroenke, A. D. Saunders; Are oceanic plateaus sites of komatiite formation?. Geology 1991;; 19 (4): 376–379. doi: https://doi.org/10.1130/0091-7613(1991)019<0376:AOPSOK>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 During Cretaceous and Tertiary time a series of oceanic terranes were accreted onto the Pacific continental margin of Colombia. The island of Gorgona is thought to represent part of the most recent, early Eocene, terrane-forming event. Gorgona is remarkable for the occurrence of komatiites of middle Cretaceous age, having MgO contents up to 24%. The geochemistry of spatially and temporally associated tholeiites suggests that Gorgona is an obducted fragment of the oceanic Caribbean Plateau, postulated by Duncan and Hargraves (1984) to have formed at 100 to 75 Ma over the Galapagos hotspot. Further examples of high-MgO oceanic lavas that may represent fragments of the Caribbean Plateau occur in allochthonous terranes on the island of Curaçao in the Netherlands Antilles and in the Romeral zone ophiolites in the southwestern Colombian Andes. These and other examples suggest that the formation of high-MgO liquids may be a feature of oceanic-plateau settings. The association of Phanerozoic komatiites with oceanic plateaus, coupled with thermal considerations, provides a plausible analogue for the origin of some komatiite-tholeiite sequences in Archean greenstone belts. 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.