Long-lived mantle-plume influence on an Archean protocontinent: Geochemical evidence from the 3 Ga Lumby Lake greenstone belt, Ontario, Canada

Abstract

Research Article| August 01, 1998 Long-lived mantle-plume influence on an Archean protocontinent: Geochemical evidence from the 3 Ga Lumby Lake greenstone belt, Ontario, Canada Derek Wyman; Derek Wyman 1Centre for Strategic Mineral Deposits, Department of Geology, University of Western Australia, Nedlands 6009, Australia Search for other works by this author on: GSW Google Scholar Pete Hollings Pete Hollings 2Department of Geological Sciences, University of Saskatchewan, Saskatoon, Saskatchewan S7N 5E2, Canada Search for other works by this author on: GSW Google Scholar Author and Article Information Derek Wyman 1Centre for Strategic Mineral Deposits, Department of Geology, University of Western Australia, Nedlands 6009, Australia Pete Hollings 2Department of Geological Sciences, University of Saskatchewan, Saskatoon, Saskatchewan S7N 5E2, Canada Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1998) 26 (8): 719–722. https://doi.org/10.1130/0091-7613(1998)026<0719:LLMPIO>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 MailTo Tools Icon Tools Get Permissions Search Site Citation Derek Wyman, Pete Hollings; Long-lived mantle-plume influence on an Archean protocontinent: Geochemical evidence from the 3 Ga Lumby Lake greenstone belt, Ontario, Canada. Geology 1998;; 26 (8): 719–722. doi: https://doi.org/10.1130/0091-7613(1998)026<0719:LLMPIO>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 3.0 to 2.9 Ga Lumby Lake belt of the Superior province is composed of plume-related komatiite-tholeiite sequences and calc-alkalic volcanic units, and tonalite-trondhjemite-granodiorite units formed by coeval magmatism; they are all intercalated throughout a 100 m.y. interval. These observations are inconsistent with plateau-accretion models of crustal growth. Sporadic subduction of plume-modified ocean spreading centers, followed by plume impingement beneath a northern Superior province cratonic nucleus, more readily accounts for the long duration of coexisting plume- and arc-type volcanism. The recognition of such complex geodynamic settings in the Archean has important consequences for crustal-growth models. 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.