The tectonic evolution of the Tianshan Orogenic Belt: Evidence from U-Pb dating of detrital zircons from the Chinese southwestern Tianshan accretionary melange
The Tianshan Orogenic Belt, which is located in the southwestern part of the Central Asian Orogenic Belt (CAOB), is an important component in the reconstruction of the tectonic evolution of the CAOB. In order to examine the evolution of the Tianshan Orogenic Belt, we performed detrital zircon U-Pb d...
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ftpekinguniv:oai:localhost:20.500.11897/155468 2023-05-15T13:43:50+02:00 The tectonic evolution of the Tianshan Orogenic Belt: Evidence from U-Pb dating of detrital zircons from the Chinese southwestern Tianshan accretionary melange Xia, Bin Zhang, Lifei Xia, Yang Bader, Thomas Zhang, LF (reprint author), Peking Univ, Sch Earth & Space Sci, Key Lab Orogen Belt & Crustal Evolut, MOE, Beijing, Peoples R China. Peking Univ, Sch Earth & Space Sci, Key Lab Orogen Belt & Crustal Evolut, MOE, Beijing, Peoples R China. 2014 https://hdl.handle.net/20.500.11897/155468 https://doi.org/10.1016/j.gr.2013.06.015 en eng gondwana research GONDWANA RESEARCH.2014,25,(4,SI),1627-1643. 777953 1342-937X http://hdl.handle.net/20.500.11897/155468 1878-0571 doi:10.1016/j.gr.2013.06.015 WOS:000347279400022 SCI Detrital zircon U-Pb geochronology Provenance analysis Tectonic evolution Southwestern Tianshan COESITE-BEARING ECLOGITE HUWAN SHEAR ZONE KYRGYZ TIEN-SHAN HP-LT ROCKS WESTERN TIANSHAN NW CHINA SOUTH TIANSHAN CONTINENTAL-CRUST CENTRAL-ASIA NORTHWESTERN CHINA Journal 2014 ftpekinguniv https://doi.org/20.500.11897/155468 https://doi.org/10.1016/j.gr.2013.06.015 2021-08-01T08:02:38Z The Tianshan Orogenic Belt, which is located in the southwestern part of the Central Asian Orogenic Belt (CAOB), is an important component in the reconstruction of the tectonic evolution of the CAOB. In order to examine the evolution of the Tianshan Orogenic Belt, we performed detrital zircon U-Pb dating analyses of sediments from the accretionary melange from Chinese southwestern Tianshan in this study. A total of 542 analyzed spots on 541 zircon grains from five samples yield Paleoarchean to Devonian ages. The major age groups are 2520-2400 Ma, 1890-1600 Ma, 1168-651 Ma, and 490-390 Ma. Provenance analysis indicates that, the Precambrian detrital zircons were probably mainly derived from the paleo-Kazakhstan continent formed before the Early Silurian by amalgamation of the Kazakhstan-Yili microplate, the Chinese central Tianshan terrane and the Kyrgyz North and Middle Tianshan blocks, while detrital zircons with Paleozoic ages mainly from igneous rocks of the continental arc generated by the northward subduction of the south Tianshan paleocean. The age data correspond to four tectono-thermal events that took place in these small blocks, i.e., the continental nucleus growth during the Late Neoarchean-early Paleoproterozoic (similar to 2.5 Ga), the evolution of the supercontinents Columbia (2.1-1.6 Ga) and Rodinia (1.3-0.57 Ga), and the arc magmatism related with the Phanerozoic orogeny. The Precambrian zircons show a similar age pattern as the Tarim and the Cathaysia cratons and the Eastern India-Eastern Antarctica block but differ from those of Siberia distinctly. Therefore, the Tianshan region blocks and the Kazakhstan-Yili microplate have a close affinity to the eastern paleo-Gondwana fragments, but were not derived from the Siberia craton as proposed by some previous researchers. These blocks were likely generated by rifting accompanying Rodinia break-up in late Precambrian times. The youngest ages of the detrital zircons from the subduction melange show a maximum depositional age of ca. 390 Ma. It is coeval with the end of an earlier arc magmatic pulse (440-390 Ma) but a bit older than a younger one at 360-320 Ma and nearly 70-80 Ma older than the HP-UHP metamorphism in the subduction zone (320-310 Ma). (C) 2013 International Association for Gondwana Research. Published by Elsevier B.V. All rights reserved. Geosciences, Multidisciplinary SCI(E) 2 ARTICLE Lfzhang@pku.edu.cn 4,SI 1627-1643 25 Journal/Newspaper Antarc* Antarctica Siberia Peking University Institutional Repository (PKU IR) Gondwana Research 25 4 1627 1643 |
institution |
Open Polar |
collection |
Peking University Institutional Repository (PKU IR) |
op_collection_id |
ftpekinguniv |
language |
English |
topic |
Detrital zircon U-Pb geochronology Provenance analysis Tectonic evolution Southwestern Tianshan COESITE-BEARING ECLOGITE HUWAN SHEAR ZONE KYRGYZ TIEN-SHAN HP-LT ROCKS WESTERN TIANSHAN NW CHINA SOUTH TIANSHAN CONTINENTAL-CRUST CENTRAL-ASIA NORTHWESTERN CHINA |
spellingShingle |
Detrital zircon U-Pb geochronology Provenance analysis Tectonic evolution Southwestern Tianshan COESITE-BEARING ECLOGITE HUWAN SHEAR ZONE KYRGYZ TIEN-SHAN HP-LT ROCKS WESTERN TIANSHAN NW CHINA SOUTH TIANSHAN CONTINENTAL-CRUST CENTRAL-ASIA NORTHWESTERN CHINA Xia, Bin Zhang, Lifei Xia, Yang Bader, Thomas The tectonic evolution of the Tianshan Orogenic Belt: Evidence from U-Pb dating of detrital zircons from the Chinese southwestern Tianshan accretionary melange |
topic_facet |
Detrital zircon U-Pb geochronology Provenance analysis Tectonic evolution Southwestern Tianshan COESITE-BEARING ECLOGITE HUWAN SHEAR ZONE KYRGYZ TIEN-SHAN HP-LT ROCKS WESTERN TIANSHAN NW CHINA SOUTH TIANSHAN CONTINENTAL-CRUST CENTRAL-ASIA NORTHWESTERN CHINA |
description |
The Tianshan Orogenic Belt, which is located in the southwestern part of the Central Asian Orogenic Belt (CAOB), is an important component in the reconstruction of the tectonic evolution of the CAOB. In order to examine the evolution of the Tianshan Orogenic Belt, we performed detrital zircon U-Pb dating analyses of sediments from the accretionary melange from Chinese southwestern Tianshan in this study. A total of 542 analyzed spots on 541 zircon grains from five samples yield Paleoarchean to Devonian ages. The major age groups are 2520-2400 Ma, 1890-1600 Ma, 1168-651 Ma, and 490-390 Ma. Provenance analysis indicates that, the Precambrian detrital zircons were probably mainly derived from the paleo-Kazakhstan continent formed before the Early Silurian by amalgamation of the Kazakhstan-Yili microplate, the Chinese central Tianshan terrane and the Kyrgyz North and Middle Tianshan blocks, while detrital zircons with Paleozoic ages mainly from igneous rocks of the continental arc generated by the northward subduction of the south Tianshan paleocean. The age data correspond to four tectono-thermal events that took place in these small blocks, i.e., the continental nucleus growth during the Late Neoarchean-early Paleoproterozoic (similar to 2.5 Ga), the evolution of the supercontinents Columbia (2.1-1.6 Ga) and Rodinia (1.3-0.57 Ga), and the arc magmatism related with the Phanerozoic orogeny. The Precambrian zircons show a similar age pattern as the Tarim and the Cathaysia cratons and the Eastern India-Eastern Antarctica block but differ from those of Siberia distinctly. Therefore, the Tianshan region blocks and the Kazakhstan-Yili microplate have a close affinity to the eastern paleo-Gondwana fragments, but were not derived from the Siberia craton as proposed by some previous researchers. These blocks were likely generated by rifting accompanying Rodinia break-up in late Precambrian times. The youngest ages of the detrital zircons from the subduction melange show a maximum depositional age of ca. 390 Ma. It is coeval with the end of an earlier arc magmatic pulse (440-390 Ma) but a bit older than a younger one at 360-320 Ma and nearly 70-80 Ma older than the HP-UHP metamorphism in the subduction zone (320-310 Ma). (C) 2013 International Association for Gondwana Research. Published by Elsevier B.V. All rights reserved. Geosciences, Multidisciplinary SCI(E) 2 ARTICLE Lfzhang@pku.edu.cn 4,SI 1627-1643 25 |
author2 |
Zhang, LF (reprint author), Peking Univ, Sch Earth & Space Sci, Key Lab Orogen Belt & Crustal Evolut, MOE, Beijing, Peoples R China. Peking Univ, Sch Earth & Space Sci, Key Lab Orogen Belt & Crustal Evolut, MOE, Beijing, Peoples R China. |
format |
Journal/Newspaper |
author |
Xia, Bin Zhang, Lifei Xia, Yang Bader, Thomas |
author_facet |
Xia, Bin Zhang, Lifei Xia, Yang Bader, Thomas |
author_sort |
Xia, Bin |
title |
The tectonic evolution of the Tianshan Orogenic Belt: Evidence from U-Pb dating of detrital zircons from the Chinese southwestern Tianshan accretionary melange |
title_short |
The tectonic evolution of the Tianshan Orogenic Belt: Evidence from U-Pb dating of detrital zircons from the Chinese southwestern Tianshan accretionary melange |
title_full |
The tectonic evolution of the Tianshan Orogenic Belt: Evidence from U-Pb dating of detrital zircons from the Chinese southwestern Tianshan accretionary melange |
title_fullStr |
The tectonic evolution of the Tianshan Orogenic Belt: Evidence from U-Pb dating of detrital zircons from the Chinese southwestern Tianshan accretionary melange |
title_full_unstemmed |
The tectonic evolution of the Tianshan Orogenic Belt: Evidence from U-Pb dating of detrital zircons from the Chinese southwestern Tianshan accretionary melange |
title_sort |
tectonic evolution of the tianshan orogenic belt: evidence from u-pb dating of detrital zircons from the chinese southwestern tianshan accretionary melange |
publisher |
gondwana research |
publishDate |
2014 |
url |
https://hdl.handle.net/20.500.11897/155468 https://doi.org/10.1016/j.gr.2013.06.015 |
genre |
Antarc* Antarctica Siberia |
genre_facet |
Antarc* Antarctica Siberia |
op_source |
SCI |
op_relation |
GONDWANA RESEARCH.2014,25,(4,SI),1627-1643. 777953 1342-937X http://hdl.handle.net/20.500.11897/155468 1878-0571 doi:10.1016/j.gr.2013.06.015 WOS:000347279400022 |
op_doi |
https://doi.org/20.500.11897/155468 https://doi.org/10.1016/j.gr.2013.06.015 |
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Gondwana Research |
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25 |
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4 |
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1627 |
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1643 |
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