Characterisation and tracing of Permian magmatism in the south-western segment of the Gondwanan margin; U-Pb age, Lu-Hf and O isotopic compositions of detrital zircons from metasedimentary complexes of northern Antarctic Peninsula and western Patagonia
Metasedimentary rocks in the Antarctic Peninsula and south-western Patagonia record detrital zircon evidence for significant Permian magmatic events along the Palaeo-Pacific margin of south West Gondwana. However, it is unclear where and how this magmatism formed due to the lack of outcropping Permi...
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ftunivchile:oai:repositorio.uchile.cl:2250/142864 2023-05-15T13:41:32+02:00 Characterisation and tracing of Permian magmatism in the south-western segment of the Gondwanan margin; U-Pb age, Lu-Hf and O isotopic compositions of detrital zircons from metasedimentary complexes of northern Antarctic Peninsula and western Patagonia Castillo, Paula Fanning, C. Mark Hervé Allamand, Francisco Lacassie, Juan Pablo 2016 application/pdf https://doi.org/10.1016/j.gr.2015.07.014 https://repositorio.uchile.cl/handle/2250/142864 en eng Gondwana Research. Volumen: 36 Páginas: 1-13 doi:10.1016/j.gr.2015.07.014 https://repositorio.uchile.cl/handle/2250/142864 Attribution-NonCommercial-NoDerivs 3.0 Chile http://creativecommons.org/licenses/by-nc-nd/3.0/cl/ CC-BY-NC-ND Gondwana Research Duque de York Complex Trinity Peninsula Group O - Hf isotopes Permian SHRIMP detrital zircon ages Artículo de revista 2016 ftunivchile https://doi.org/10.1016/j.gr.2015.07.014 2023-01-29T00:55:29Z Metasedimentary rocks in the Antarctic Peninsula and south-western Patagonia record detrital zircon evidence for significant Permian magmatic events along the Palaeo-Pacific margin of south West Gondwana. However, it is unclear where and how this magmatism formed due to the lack of outcropping Permian igneous sources at similar latitudes. Combined U-Pb, O, and Lu-Hf isotope analyses of detrital zircon grains in Permo-Triassic metasedimentary rocks indicate that the Permian magmatism resulted from the interaction of crust- and mantle-derived sources in an active continental margin. Permian detrital zircons from the Trinity Peninsula Group in the Antarctic Peninsula range from crustal signatures in the northern part (delta O-18 of similar to 8 parts per thousand, initial epsilon(Hf) of similar to-6) to mantle-like values in the south (delta O-18 of similar to 5 parts per thousand, initial epsilon(Hf) of similar to+3). Zircons from the northern domain have isotopic features similar to those from the Patagonian Duque de York Complex. They also share a secondary Ordovician component of ca. 470 Ma. The Middle Jurassic Cape Wallace Beds in Low Island record a ca. 250 Ma igneous source, with stronger crustal signatures (delta O-18 and initial epsilon(Hf) values of 7.5 to 10.8 parts per thousand and 3.2 to -14.2, respectively). In contrast, zircons from the upper Jurassic Miers Bluff Formation on Livingston Island and Cretaceous sediments on James Ross Island have similar Permian U-Pb ages, O and Hf trends to their Trinity Peninsula Group counterparts, suggesting reworking after the late Jurassic. Our results provide evidence for a Permian subduction-related magmatic arc, partly located in Patagonia and extending to West Antarctica. The southerly decrease in 8180 coupled with increasing initial epsilon(Hf) indicate fewer sedimentary components in the magma source and is consistent with a glaciated cold and dry climate. These conditions are comparable with West Antarctica climate settings, located close to the South Pole ... Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica James Ross Island Livingston Island Low Island Ross Island South pole South pole West Antarctica Universidad de Chile: Repositorio académico Antarctic The Antarctic Antarctic Peninsula Patagonia West Antarctica Ross Island Pacific South Pole Livingston Island ENVELOPE(-60.500,-60.500,-62.600,-62.600) Miers ENVELOPE(163.850,163.850,-78.100,-78.100) Trinity Peninsula ENVELOPE(-58.000,-58.000,-63.500,-63.500) Miers Bluff ENVELOPE(-60.438,-60.438,-62.720,-62.720) Cape Wallace ENVELOPE(-62.250,-62.250,-63.217,-63.217) Gondwana Research 36 1 13 |
institution |
Open Polar |
collection |
Universidad de Chile: Repositorio académico |
op_collection_id |
ftunivchile |
language |
English |
topic |
Duque de York Complex Trinity Peninsula Group O - Hf isotopes Permian SHRIMP detrital zircon ages |
spellingShingle |
Duque de York Complex Trinity Peninsula Group O - Hf isotopes Permian SHRIMP detrital zircon ages Castillo, Paula Fanning, C. Mark Hervé Allamand, Francisco Lacassie, Juan Pablo Characterisation and tracing of Permian magmatism in the south-western segment of the Gondwanan margin; U-Pb age, Lu-Hf and O isotopic compositions of detrital zircons from metasedimentary complexes of northern Antarctic Peninsula and western Patagonia |
topic_facet |
Duque de York Complex Trinity Peninsula Group O - Hf isotopes Permian SHRIMP detrital zircon ages |
description |
Metasedimentary rocks in the Antarctic Peninsula and south-western Patagonia record detrital zircon evidence for significant Permian magmatic events along the Palaeo-Pacific margin of south West Gondwana. However, it is unclear where and how this magmatism formed due to the lack of outcropping Permian igneous sources at similar latitudes. Combined U-Pb, O, and Lu-Hf isotope analyses of detrital zircon grains in Permo-Triassic metasedimentary rocks indicate that the Permian magmatism resulted from the interaction of crust- and mantle-derived sources in an active continental margin. Permian detrital zircons from the Trinity Peninsula Group in the Antarctic Peninsula range from crustal signatures in the northern part (delta O-18 of similar to 8 parts per thousand, initial epsilon(Hf) of similar to-6) to mantle-like values in the south (delta O-18 of similar to 5 parts per thousand, initial epsilon(Hf) of similar to+3). Zircons from the northern domain have isotopic features similar to those from the Patagonian Duque de York Complex. They also share a secondary Ordovician component of ca. 470 Ma. The Middle Jurassic Cape Wallace Beds in Low Island record a ca. 250 Ma igneous source, with stronger crustal signatures (delta O-18 and initial epsilon(Hf) values of 7.5 to 10.8 parts per thousand and 3.2 to -14.2, respectively). In contrast, zircons from the upper Jurassic Miers Bluff Formation on Livingston Island and Cretaceous sediments on James Ross Island have similar Permian U-Pb ages, O and Hf trends to their Trinity Peninsula Group counterparts, suggesting reworking after the late Jurassic. Our results provide evidence for a Permian subduction-related magmatic arc, partly located in Patagonia and extending to West Antarctica. The southerly decrease in 8180 coupled with increasing initial epsilon(Hf) indicate fewer sedimentary components in the magma source and is consistent with a glaciated cold and dry climate. These conditions are comparable with West Antarctica climate settings, located close to the South Pole ... |
format |
Article in Journal/Newspaper |
author |
Castillo, Paula Fanning, C. Mark Hervé Allamand, Francisco Lacassie, Juan Pablo |
author_facet |
Castillo, Paula Fanning, C. Mark Hervé Allamand, Francisco Lacassie, Juan Pablo |
author_sort |
Castillo, Paula |
title |
Characterisation and tracing of Permian magmatism in the south-western segment of the Gondwanan margin; U-Pb age, Lu-Hf and O isotopic compositions of detrital zircons from metasedimentary complexes of northern Antarctic Peninsula and western Patagonia |
title_short |
Characterisation and tracing of Permian magmatism in the south-western segment of the Gondwanan margin; U-Pb age, Lu-Hf and O isotopic compositions of detrital zircons from metasedimentary complexes of northern Antarctic Peninsula and western Patagonia |
title_full |
Characterisation and tracing of Permian magmatism in the south-western segment of the Gondwanan margin; U-Pb age, Lu-Hf and O isotopic compositions of detrital zircons from metasedimentary complexes of northern Antarctic Peninsula and western Patagonia |
title_fullStr |
Characterisation and tracing of Permian magmatism in the south-western segment of the Gondwanan margin; U-Pb age, Lu-Hf and O isotopic compositions of detrital zircons from metasedimentary complexes of northern Antarctic Peninsula and western Patagonia |
title_full_unstemmed |
Characterisation and tracing of Permian magmatism in the south-western segment of the Gondwanan margin; U-Pb age, Lu-Hf and O isotopic compositions of detrital zircons from metasedimentary complexes of northern Antarctic Peninsula and western Patagonia |
title_sort |
characterisation and tracing of permian magmatism in the south-western segment of the gondwanan margin; u-pb age, lu-hf and o isotopic compositions of detrital zircons from metasedimentary complexes of northern antarctic peninsula and western patagonia |
publishDate |
2016 |
url |
https://doi.org/10.1016/j.gr.2015.07.014 https://repositorio.uchile.cl/handle/2250/142864 |
long_lat |
ENVELOPE(-60.500,-60.500,-62.600,-62.600) ENVELOPE(163.850,163.850,-78.100,-78.100) ENVELOPE(-58.000,-58.000,-63.500,-63.500) ENVELOPE(-60.438,-60.438,-62.720,-62.720) ENVELOPE(-62.250,-62.250,-63.217,-63.217) |
geographic |
Antarctic The Antarctic Antarctic Peninsula Patagonia West Antarctica Ross Island Pacific South Pole Livingston Island Miers Trinity Peninsula Miers Bluff Cape Wallace |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula Patagonia West Antarctica Ross Island Pacific South Pole Livingston Island Miers Trinity Peninsula Miers Bluff Cape Wallace |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica James Ross Island Livingston Island Low Island Ross Island South pole South pole West Antarctica |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica James Ross Island Livingston Island Low Island Ross Island South pole South pole West Antarctica |
op_source |
Gondwana Research |
op_relation |
Gondwana Research. Volumen: 36 Páginas: 1-13 doi:10.1016/j.gr.2015.07.014 https://repositorio.uchile.cl/handle/2250/142864 |
op_rights |
Attribution-NonCommercial-NoDerivs 3.0 Chile http://creativecommons.org/licenses/by-nc-nd/3.0/cl/ |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.1016/j.gr.2015.07.014 |
container_title |
Gondwana Research |
container_volume |
36 |
container_start_page |
1 |
op_container_end_page |
13 |
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1766151744610369536 |