LEADER	03184nas a2200409 c 4500
001	129-293676
007	cr
008	2014 p eng
041			|a eng
100			|a Petts, D C  |4 aut
245			|a 1.8 billion years of fluid-crust interaction  |b a zircon oxygen isotope record for the lower crust, western Churchill Province, Canadian Shield
260			|b Elsevier BV  |c 2014
490			|a GEM: Geo-mapping for Energy and Minerals
520			|a The western Churchill Province of the Canadian Shield experienced a prolonged and complex formation history (ca. 4.04 to 1.70 Ga), with evidence for multiple episodes of orogenesis and regional magmatic activity. Here we report on the oxygen isotopic compositions of garnet and zircon recovered from lower crustal xenoliths, which have U-Pb ages between ca. 3.5 to 1.7 Ga. Zircons from four metabasite xenoliths from the Rankin Inlet sample suite have ?18O values ranging from +5.7 to +8.6 ¿. Zircon from three metatonalite/anorthosite xenoliths and five metabasite xenoliths from the Repulse Bay sample suite have ?18O values of +5.6 to +8.3 ¿. High ?18O values (> +6.0¿) measured for the oldest igneous zircon cores (ca. 3.5 Ga and 3.0-2.6 Ga) from three metatonalite/anorthosite xenoliths indicate zircon crystallization from evolved metatonalite/anorthosite protolith magmas that were generated from or had assimilated supracrustal rocks, which interacted previously with surface-derived fluids. Mantle-like ?18O values of ca. 2.9-2.6 Ga igneous zircon cores from one metabasite xenolith suggest formation from a juvenile basaltic/gabbroic magma. The mantle-like ?18O values of ca. 2.0-1.9 Ga metamorphic cores from one metabasite xenolith indicate a basalt/gabbro protolith and localized reworking of the lower crust caused by regional-scale plate convergence. The wide range of ?18O values for ca. 1.75-1.70 Ga metamorphic rims (identified in all xenoliths) indicates regional transient heating and reworking of juvenile and evolved, supracrustal-derived crust, induced by magmatic underplating along the crust-mantle boundary.
650			|a Cumberland Batholith
650			|a Chesterfield Block
650			|a Central Heearne Supracrustal Belt
650			|a Athabasca Mylonite Zone
650			|a Pehnryn Group
650			|a Piling Group
650			|a Snowbird Tectonic
650			|a Wathaman Batholith
650			|a British Columbia
650			|a Northwest Territories
650			|a Nunavut
650			|a Manitoba
650			|a Saskatchewan
650			|a Wollaston
655			|a Zeitschrift
700			|a Moser, D E  |4 aut
700			|a Longstaffe, F J  |4 aut
700			|a Davis, W J  |4 aut
700			|a Stern, R A  |4 aut
773	0	8	|g Lithos issue 192-195, 2014 p. 259-270, Earth Sciences Sector, Contribution Series
856	4	0	|q text/html  |3 Link zur Ressource  |u https://geoscan.nrcan.gc.ca/starweb/geoscan/servlet.starweb?path=geoscan/fulle.web&search1=R=293676
856			|q text/html  |3 Diamonds, project number: MGM002 (latest publications):   |u https://geoscan.nrcan.gc.ca/starweb/geoscan/servlet.starweb?path=geoscan/shorte.web&search1=PROJECT=MGM002
980			|a 293676  |b 129  |c sid-129-col-geoscan

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author	Petts, D C, Moser, D E, Longstaffe, F J, Davis, W J, Stern, R A
author_facet	Petts, D C, Moser, D E, Longstaffe, F J, Davis, W J, Stern, R A
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contents	The western Churchill Province of the Canadian Shield experienced a prolonged and complex formation history (ca. 4.04 to 1.70 Ga), with evidence for multiple episodes of orogenesis and regional magmatic activity. Here we report on the oxygen isotopic compositions of garnet and zircon recovered from lower crustal xenoliths, which have U-Pb ages between ca. 3.5 to 1.7 Ga. Zircons from four metabasite xenoliths from the Rankin Inlet sample suite have ?18O values ranging from +5.7 to +8.6 ¿. Zircon from three metatonalite/anorthosite xenoliths and five metabasite xenoliths from the Repulse Bay sample suite have ?18O values of +5.6 to +8.3 ¿. High ?18O values (> +6.0¿) measured for the oldest igneous zircon cores (ca. 3.5 Ga and 3.0-2.6 Ga) from three metatonalite/anorthosite xenoliths indicate zircon crystallization from evolved metatonalite/anorthosite protolith magmas that were generated from or had assimilated supracrustal rocks, which interacted previously with surface-derived fluids. Mantle-like ?18O values of ca. 2.9-2.6 Ga igneous zircon cores from one metabasite xenolith suggest formation from a juvenile basaltic/gabbroic magma. The mantle-like ?18O values of ca. 2.0-1.9 Ga metamorphic cores from one metabasite xenolith indicate a basalt/gabbro protolith and localized reworking of the lower crust caused by regional-scale plate convergence. The wide range of ?18O values for ca. 1.75-1.70 Ga metamorphic rims (identified in all xenoliths) indicates regional transient heating and reworking of juvenile and evolved, supracrustal-derived crust, induced by magmatic underplating along the crust-mantle boundary.
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hierarchy_top_title	, 1.8 billion years of fluid-crust interaction: a zircon oxygen isotope record for the lower crust, western Churchill Province, Canadian Shield
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spelling	Petts, D C aut, 1.8 billion years of fluid-crust interaction a zircon oxygen isotope record for the lower crust, western Churchill Province, Canadian Shield, Elsevier BV 2014, GEM: Geo-mapping for Energy and Minerals, The western Churchill Province of the Canadian Shield experienced a prolonged and complex formation history (ca. 4.04 to 1.70 Ga), with evidence for multiple episodes of orogenesis and regional magmatic activity. Here we report on the oxygen isotopic compositions of garnet and zircon recovered from lower crustal xenoliths, which have U-Pb ages between ca. 3.5 to 1.7 Ga. Zircons from four metabasite xenoliths from the Rankin Inlet sample suite have ?18O values ranging from +5.7 to +8.6 ¿. Zircon from three metatonalite/anorthosite xenoliths and five metabasite xenoliths from the Repulse Bay sample suite have ?18O values of +5.6 to +8.3 ¿. High ?18O values (> +6.0¿) measured for the oldest igneous zircon cores (ca. 3.5 Ga and 3.0-2.6 Ga) from three metatonalite/anorthosite xenoliths indicate zircon crystallization from evolved metatonalite/anorthosite protolith magmas that were generated from or had assimilated supracrustal rocks, which interacted previously with surface-derived fluids. Mantle-like ?18O values of ca. 2.9-2.6 Ga igneous zircon cores from one metabasite xenolith suggest formation from a juvenile basaltic/gabbroic magma. The mantle-like ?18O values of ca. 2.0-1.9 Ga metamorphic cores from one metabasite xenolith indicate a basalt/gabbro protolith and localized reworking of the lower crust caused by regional-scale plate convergence. The wide range of ?18O values for ca. 1.75-1.70 Ga metamorphic rims (identified in all xenoliths) indicates regional transient heating and reworking of juvenile and evolved, supracrustal-derived crust, induced by magmatic underplating along the crust-mantle boundary., Cumberland Batholith, Chesterfield Block, Central Heearne Supracrustal Belt, Athabasca Mylonite Zone, Pehnryn Group, Piling Group, Snowbird Tectonic, Wathaman Batholith, British Columbia, Northwest Territories, Nunavut, Manitoba, Saskatchewan, Wollaston, Zeitschrift, Moser, D E aut, Longstaffe, F J aut, Davis, W J aut, Stern, R A aut, Lithos issue 192-195, 2014 p. 259-270, Earth Sciences Sector, Contribution Series , text/html Link zur Ressource https://geoscan.nrcan.gc.ca/starweb/geoscan/servlet.starweb?path=geoscan/fulle.web&search1=R=293676, text/html Diamonds, project number: MGM002 (latest publications): https://geoscan.nrcan.gc.ca/starweb/geoscan/servlet.starweb?path=geoscan/shorte.web&search1=PROJECT=MGM002
spellingShingle	Petts, D C, Moser, D E, Longstaffe, F J, Davis, W J, Stern, R A, 1.8 billion years of fluid-crust interaction: a zircon oxygen isotope record for the lower crust, western Churchill Province, Canadian Shield, The western Churchill Province of the Canadian Shield experienced a prolonged and complex formation history (ca. 4.04 to 1.70 Ga), with evidence for multiple episodes of orogenesis and regional magmatic activity. Here we report on the oxygen isotopic compositions of garnet and zircon recovered from lower crustal xenoliths, which have U-Pb ages between ca. 3.5 to 1.7 Ga. Zircons from four metabasite xenoliths from the Rankin Inlet sample suite have ?18O values ranging from +5.7 to +8.6 ¿. Zircon from three metatonalite/anorthosite xenoliths and five metabasite xenoliths from the Repulse Bay sample suite have ?18O values of +5.6 to +8.3 ¿. High ?18O values (> +6.0¿) measured for the oldest igneous zircon cores (ca. 3.5 Ga and 3.0-2.6 Ga) from three metatonalite/anorthosite xenoliths indicate zircon crystallization from evolved metatonalite/anorthosite protolith magmas that were generated from or had assimilated supracrustal rocks, which interacted previously with surface-derived fluids. Mantle-like ?18O values of ca. 2.9-2.6 Ga igneous zircon cores from one metabasite xenolith suggest formation from a juvenile basaltic/gabbroic magma. The mantle-like ?18O values of ca. 2.0-1.9 Ga metamorphic cores from one metabasite xenolith indicate a basalt/gabbro protolith and localized reworking of the lower crust caused by regional-scale plate convergence. The wide range of ?18O values for ca. 1.75-1.70 Ga metamorphic rims (identified in all xenoliths) indicates regional transient heating and reworking of juvenile and evolved, supracrustal-derived crust, induced by magmatic underplating along the crust-mantle boundary., Cumberland Batholith, Chesterfield Block, Central Heearne Supracrustal Belt, Athabasca Mylonite Zone, Pehnryn Group, Piling Group, Snowbird Tectonic, Wathaman Batholith, British Columbia, Northwest Territories, Nunavut, Manitoba, Saskatchewan, Wollaston, Zeitschrift
title	1.8 billion years of fluid-crust interaction: a zircon oxygen isotope record for the lower crust, western Churchill Province, Canadian Shield
title_auth	1.8 billion years of fluid-crust interaction a zircon oxygen isotope record for the lower crust, western Churchill Province, Canadian Shield
title_full	1.8 billion years of fluid-crust interaction a zircon oxygen isotope record for the lower crust, western Churchill Province, Canadian Shield
title_fullStr	1.8 billion years of fluid-crust interaction a zircon oxygen isotope record for the lower crust, western Churchill Province, Canadian Shield
title_full_unstemmed	1.8 billion years of fluid-crust interaction a zircon oxygen isotope record for the lower crust, western Churchill Province, Canadian Shield
title_in_hierarchy
title_short	1.8 billion years of fluid-crust interaction
title_sort	1 8 billion years of fluid crust interaction a zircon oxygen isotope record for the lower crust western churchill province canadian shield
title_sub	a zircon oxygen isotope record for the lower crust, western Churchill Province, Canadian Shield
title_unstemmed	1.8 billion years of fluid-crust interaction: a zircon oxygen isotope record for the lower crust, western Churchill Province, Canadian Shield
topic	Cumberland Batholith, Chesterfield Block, Central Heearne Supracrustal Belt, Athabasca Mylonite Zone, Pehnryn Group, Piling Group, Snowbird Tectonic, Wathaman Batholith, British Columbia, Northwest Territories, Nunavut, Manitoba, Saskatchewan, Wollaston, Zeitschrift
topic_facet	Cumberland Batholith, Chesterfield Block, Central Heearne Supracrustal Belt, Athabasca Mylonite Zone, Pehnryn Group, Piling Group, Snowbird Tectonic, Wathaman Batholith, British Columbia, Northwest Territories, Nunavut, Manitoba, Saskatchewan, Wollaston, Zeitschrift
url	https://geoscan.nrcan.gc.ca/starweb/geoscan/servlet.starweb?path=geoscan/fulle.web&search1=R=293676