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Record #209632:
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MARC recordAntarctic reworking and differentiation of continental crust along the active margin of Gondwana: a zircon Hf-O perspective from West Antarctica / Chris Yakymchuk, and 5 others.
| Title: | Antarctic reworking and differentiation of continental crust along the active margin of Gondwana: a zircon Hf-O perspective from West Antarctica / Chris Yakymchuk, and 5 others. |
| Author(s): | Yakymchuk, Chris. |
| Date: | 2013. |
| Publisher: | London: Geological Society |
| In: | Antarctica and supercontinent evolution. (2013.), |
| Abstract: | Reports results of Hf-O isotope analyses of zircons from two generations of granite in Fosdick migmatite-granite complex of Ford Ranges of Marie Byrd Land, Antarctica, located along former active margin of Gondwana. Granites are hosted in high-grade equivalents of supracrustal sequence and infracrustal calc-alkaline intrusive suite. Hf-O isotope signature of zircons from Devonian-Carboniferous granites suggest crustal reworking as dominant process, but isotopically more juvenile source is required to explain wider range of εHf values in zircons from Cretaceous granites. Although Hf-O and Nd isotope characteristics of Fosdick complex granites are similar to Permo-Triassic granites from Antarctic Peninsula, they contrast with Hf-O and Nd isotope results from other localities along and across former active margin of Gondwana, suggesting significant margin-parallel and margin-perpendicular variations in both amount and nature of crustal reworking v. crustal growth with time. |
| Notes: | In: Antarctica and supercontinent evolution / Simon L. Harley, Ian C.W. Fitzsimons, Yue Zhao, eds. |
| Keywords: | 551.1/.4 -- Geology. 551.24 -- Geotectonics. 551.241 -- Plate tectonics. 551.8 -- Palaeogeography. 551.41 -- Reconstruction of ancient landmasses. 552 -- Petrology. 552.3 -- Igneous rocks. 552.321.1 -- Granite. 550.4 -- Geochemistry. 54.027 -- Isotope analysis. 551.7 -- Stratigraphy. 551.734 -- Devonian. 551.735 -- Carboniferous. 551.763 -- Cretaceous. B -- Geology and soil sciences. (*7) -- Antarctic regions. (*77) -- Antarctica, Pacific sector. (*772) -- Byrd Land. (*772.6) -- Ruppert Coast. (217.5) -- Gondwana. |
| SPRI record no.: | 209632 |
LDR 02650naa#a2200000#a#4500 001 SPRI-209632 005 20240419104905.0 007 ta 008 240419s2013####enkab##|#####|0||#0#eng#d 035 ## ‡aSPRI-209632 040 ## ‡aUkCU-P‡beng‡eaacr 100 1# ‡aYakymchuk, Chris. 245 10 ‡aAntarctic reworking and differentiation of continental crust along the active margin of Gondwana :‡ba zircon Hf-O perspective from West Antarctica /‡cChris Yakymchuk, and 5 others. 260 ## ‡aLondon :‡bGeological Society,‡c2013. 300 ## ‡ap. 169-210 :‡bill., diags., tables, maps. 500 ## ‡aIn: Antarctica and supercontinent evolution / Simon L. Harley, Ian C.W. Fitzsimons, Yue Zhao, eds. 520 3# ‡aReports results of Hf-O isotope analyses of zircons from two generations of granite in Fosdick migmatite-granite complex of Ford Ranges of Marie Byrd Land, Antarctica, located along former active margin of Gondwana. Granites are hosted in high-grade equivalents of supracrustal sequence and infracrustal calc-alkaline intrusive suite. Hf-O isotope signature of zircons from Devonian-Carboniferous granites suggest crustal reworking as dominant process, but isotopically more juvenile source is required to explain wider range of εHf values in zircons from Cretaceous granites. Although Hf-O and Nd isotope characteristics of Fosdick complex granites are similar to Permo-Triassic granites from Antarctic Peninsula, they contrast with Hf-O and Nd isotope results from other localities along and across former active margin of Gondwana, suggesting significant margin-parallel and margin-perpendicular variations in both amount and nature of crustal reworking v. crustal growth with time. 650 07 ‡a551.1/.4 -- Geology.‡2udc 650 07 ‡a551.24 -- Geotectonics.‡2udc 650 07 ‡a551.241 -- Plate tectonics.‡2udc 650 07 ‡a551.8 -- Palaeogeography.‡2udc 650 07 ‡a551.41 -- Reconstruction of ancient landmasses.‡2udc 650 07 ‡a552 -- Petrology.‡2udc 650 07 ‡a552.3 -- Igneous rocks.‡2udc 650 07 ‡a552.321.1 -- Granite.‡2udc 650 07 ‡a550.4 -- Geochemistry.‡2udc 650 07 ‡a54.027 -- Isotope analysis.‡2udc 650 07 ‡a551.7 -- Stratigraphy.‡2udc 650 07 ‡a551.734 -- Devonian.‡2udc 650 07 ‡a551.735 -- Carboniferous.‡2udc 650 07 ‡a551.763 -- Cretaceous.‡2udc 650 07 ‡aB -- Geology and soil sciences.‡2local 651 #7 ‡a(*7) -- Antarctic regions.‡2udc 651 #7 ‡a(*77) -- Antarctica, Pacific sector.‡2udc 651 #7 ‡a(*772) -- Byrd Land.‡2udc 651 #7 ‡a(*772.6) -- Ruppert Coast.‡2udc 651 #7 ‡a(217.5) -- Gondwana.‡2udc 773 0# ‡7nnam ‡aSimon L. Harley, Ian C.W. Fitzsimons, Yue Zhao, eds. ‡tAntarctica and supercontinent evolution. ‡dLondon : Geological Society, 2013. ‡wSPRI-208362 916 ## ‡a2014/09/18 -- HS 917 ## ‡aUnenhanced record from Muscat, imported 2019 948 3# ‡a20240419 ‡bHS