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- W2018088908 abstract "Research Article| March 01, 2003 Late-stage extensional exhumation of high-pressure granulites in the Greenland Caledonides William C. McClelland; William C. McClelland 1Department of Geological Sciences, University of Idaho, Moscow, Idaho 83844, USA Search for other works by this author on: GSW Google Scholar Jane A. Gilotti Jane A. Gilotti 2Department of Geoscience, University of Iowa, Iowa City, Iowa 52242, USA Search for other works by this author on: GSW Google Scholar Author and Article Information William C. McClelland 1Department of Geological Sciences, University of Idaho, Moscow, Idaho 83844, USA Jane A. Gilotti 2Department of Geoscience, University of Iowa, Iowa City, Iowa 52242, USA Publisher: Geological Society of America Received: 30 Jun 2002 Revision Received: 24 Oct 2002 Accepted: 25 Oct 2002 First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (2003) 31 (3): 259–262. https://doi.org/10.1130/0091-7613(2003)031<0259:LSEEOH>2.0.CO;2 Article history Received: 30 Jun 2002 Revision Received: 24 Oct 2002 Accepted: 25 Oct 2002 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 William C. McClelland, Jane A. Gilotti; Late-stage extensional exhumation of high-pressure granulites in the Greenland Caledonides. Geology 2003;; 31 (3): 259–262. doi: https://doi.org/10.1130/0091-7613(2003)031<0259:LSEEOH>2.0.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 New ages from high-pressure (P) granulites in Payer Land, East Greenland, suggest that exhumation of the deepest crustal levels occurred during extensional collapse late in the collisional history of the Caledonian orogen. The ages set limits on the time of movement on the Payer Land detachment fault, which places a little-deformed low-grade metasedimentary sequence on the granulite gneisses. U-Pb SHRIMP (sensitive high-resolution ion microprobe) analyses of metamorphic rims on zircon from high-P (1.4–1.5 GPa) metapsammite yield a weighted mean 206Pb/238U age of 403 ± 5 Ma. Zircon analyses from a high-P kyanite-bearing melt pod derived from metapelites yield a weighted mean 206Pb/238U age of 404 ± 4 Ma. The high-P metamorphism is distinctly younger than the extension associated with generation of 430–424 Ma leucogranites and migmatites at mid-crustal levels. Exhumation of deep-level rocks in Payer Land some time after 405 Ma is roughly coeval with exhumation of eclogite terranes in the Scandinavian Caledonides. Orogenic collapse in the Caledonides appears to have taken place in two stages: synorogenic extension dated by leucogranites, followed 24–30 m.y. later by late orogenic exhumation of the deepest levels. The history of this ancient, well-exposed collisional orogen is an analogue for evolution of the Himalayan system and perhaps offers a predictive model for future exhumation of high-P rocks currently forming at the base of the overthickened Himalayan crust. You do not have access to this content, please speak to your institutional administrator if you feel you should have access." @default.
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- W2018088908 title "Late-stage extensional exhumation of high-pressure granulites in the Greenland Caledonides" @default.
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