U-Pb zircon and rutile ages from granulite xenoliths in the Slave province: Evidence for mafic magmatism in the lower crust coincident with Proterozoic dike swarms

Research Article| April 01, 1997 U-Pb zircon and rutile ages from granulite xenoliths in the Slave province: Evidence for mafic magmatism in the lower crust coincident with Proterozoic dike swarms W. J. Davis W. J. Davis 1Geological Survey of Canada, 601 Booth St., Ottawa, Ontario, K1A 0E8, Canada Search for other works by this author on: GSW Google Scholar Author and Article Information W. J. Davis 1Geological Survey of Canada, 601 Booth St., Ottawa, Ontario, K1A 0E8, Canada Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1997) 25 (4): 343–346. https://doi.org/10.1130/0091-7613(1997)025<0343:UPZARA>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 W. J. Davis; U-Pb zircon and rutile ages from granulite xenoliths in the Slave province: Evidence for mafic magmatism in the lower crust coincident with Proterozoic dike swarms. Geology 1997;; 25 (4): 343–346. doi: https://doi.org/10.1130/0091-7613(1997)025<0343:UPZARA>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 Zircon and rutile in two garnet-bearing mafic granulite xenoliths from a kimberlite in the Archean Slave province record Proterozoic ages similar to the 1.27 Ga Mackenzie dike swarm or similar to the ca. 2.23–2.21 Ga Malley-McKay diabase dike swarms. The xenolith sample site currently overlies thick lithosphere, more than 700 km to the southeast of the proposed Mackenzie plume center. Because lower crust was effectively shielded from the thermal effects of an upwelling plume by thick lithospheric mantle, heat was most likely advected into the lower crust by lateral intrusion of mafic sills over distances of hundreds of kilometres from magma generation zones nearer the plume center. 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.