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Three episodes of Triassic volcanism in the Eastern Kunlun Orogen, NW China: constraints for evolution of the Palaeo-Tethys Ocean.

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Title: Three episodes of Triassic volcanism in the Eastern Kunlun Orogen, NW China: constraints for evolution of the Palaeo-Tethys Ocean.
Authors: Li, Hao-Ran1,2 (AUTHOR) lihaoran@jlu.edu.cn, Qiao, Jian-Feng3,4 (AUTHOR), Sun, Feng-Yue3,5 (AUTHOR) fyuesun@163.com, Qian, Ye3,5,6 (AUTHOR) qianye@jlu.edu.cn, Wang, Yan-Zhang1,2 (AUTHOR), Bakht, Shahzad3 (AUTHOR), Liu, Hao-Tian7 (AUTHOR), Gu, Yan3 (AUTHOR)
Source: International Geology Review. May2024, Vol. 66 Issue 10, p1815-1837. 23p.
Subject Terms: *Volcanism, *Volcanic ash, tuff, etc., *Ocean, *Orogenic belts, *Volcanology, *Orogeny
Geographic Terms: Kunlun Mountains (China & India), China
Abstract: The Eastern Kunlun Orogenic Belt (EKOB), located north of the Qinghai-Tibetan Plateau, recorded voluminous late Palaeozoic – early Mesozoic intermediate-acid volcanic rocks. The tectonic evolution of the Palaeo-Tethys Ocean from initial subduction and final closure and post-collision extension has been hotly debated. This study examines the petrogenesis of Palaeozoic to Early Mesozoic volcanic rocks at six locations: Xiahe, Elashankou, Jirimai, Harizha, Nagengkangqieer, and Yazigounan. The investigation involves detailed field observations, petrology, zircon U-Pb geochronology, Lu-Hf isotopes, and whole-rock geochemical analysis. The rocks analysed represent three episodic volcanic events. The ca. 257–245 Ma volcanic rocks were derived from magma mixing response to the subduction. The ca. 227–220 Ma highly fractionated I-type volcanics were derived from partial melting of the ancient lower crust, with varying contribution proportions of mantle materials. The ca. 216 Ma A-type volcanic rocks derived from partial melting of the juvenile crust. In this study, using existing regional geological data and spatiotemporal distribution of the magmatic region, combined with our new data, we attempt to propose more rational models to reveal the tectonic evolution of the Palaeo-Tethys Ocean, and we recognize three significant time nodes: (1) Ca. 240 Ma marks the final closure time of the Palaeo-Tethys Ocean. (2) Ca. 230 Ma indicates the vital tectonic regime transition from compression to extension response to slab break-off and continued lithospheric delamination. (3) Ca. 216 Ma mark the beginning of the final stage of orogeny in the EKOB, and mild magmatism lasts to ca. 200 Ma in response to the mountain collapse. [ABSTRACT FROM AUTHOR]
Database: Energy & Power Source
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Header DbId: enr
DbLabel: Energy & Power Source
An: 176721380
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PubTypeId: academicJournal
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  Label: Title
  Group: Ti
  Data: Three episodes of Triassic volcanism in the Eastern Kunlun Orogen, NW China: constraints for evolution of the Palaeo-Tethys Ocean.
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  Label: Authors
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  Data: <searchLink fieldCode="AR" term="%22Li%2C+Hao-Ran%22">Li, Hao-Ran</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> lihaoran@jlu.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Qiao%2C+Jian-Feng%22">Qiao, Jian-Feng</searchLink><relatesTo>3,4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Sun%2C+Feng-Yue%22">Sun, Feng-Yue</searchLink><relatesTo>3,5</relatesTo> (AUTHOR)<i> fyuesun@163.com</i><br /><searchLink fieldCode="AR" term="%22Qian%2C+Ye%22">Qian, Ye</searchLink><relatesTo>3,5,6</relatesTo> (AUTHOR)<i> qianye@jlu.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Wang%2C+Yan-Zhang%22">Wang, Yan-Zhang</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Bakht%2C+Shahzad%22">Bakht, Shahzad</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Liu%2C+Hao-Tian%22">Liu, Hao-Tian</searchLink><relatesTo>7</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Gu%2C+Yan%22">Gu, Yan</searchLink><relatesTo>3</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22International+Geology+Review%22">International Geology Review</searchLink>. May2024, Vol. 66 Issue 10, p1815-1837. 23p.
– Name: Subject
  Label: Subject Terms
  Group: Su
  Data: *<searchLink fieldCode="DE" term="%22Volcanism%22">Volcanism</searchLink><br />*<searchLink fieldCode="DE" term="%22Volcanic+ash%2C+tuff%2C+etc%2E%22">Volcanic ash, tuff, etc.</searchLink><br />*<searchLink fieldCode="DE" term="%22Ocean%22">Ocean</searchLink><br />*<searchLink fieldCode="DE" term="%22Orogenic+belts%22">Orogenic belts</searchLink><br />*<searchLink fieldCode="DE" term="%22Volcanology%22">Volcanology</searchLink><br />*<searchLink fieldCode="DE" term="%22Orogeny%22">Orogeny</searchLink>
– Name: SubjectGeographic
  Label: Geographic Terms
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Kunlun+Mountains+%28China+%26+India%29%22">Kunlun Mountains (China & India)</searchLink><br /><searchLink fieldCode="DE" term="%22China%22">China</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The Eastern Kunlun Orogenic Belt (EKOB), located north of the Qinghai-Tibetan Plateau, recorded voluminous late Palaeozoic – early Mesozoic intermediate-acid volcanic rocks. The tectonic evolution of the Palaeo-Tethys Ocean from initial subduction and final closure and post-collision extension has been hotly debated. This study examines the petrogenesis of Palaeozoic to Early Mesozoic volcanic rocks at six locations: Xiahe, Elashankou, Jirimai, Harizha, Nagengkangqieer, and Yazigounan. The investigation involves detailed field observations, petrology, zircon U-Pb geochronology, Lu-Hf isotopes, and whole-rock geochemical analysis. The rocks analysed represent three episodic volcanic events. The ca. 257–245 Ma volcanic rocks were derived from magma mixing response to the subduction. The ca. 227–220 Ma highly fractionated I-type volcanics were derived from partial melting of the ancient lower crust, with varying contribution proportions of mantle materials. The ca. 216 Ma A-type volcanic rocks derived from partial melting of the juvenile crust. In this study, using existing regional geological data and spatiotemporal distribution of the magmatic region, combined with our new data, we attempt to propose more rational models to reveal the tectonic evolution of the Palaeo-Tethys Ocean, and we recognize three significant time nodes: (1) Ca. 240 Ma marks the final closure time of the Palaeo-Tethys Ocean. (2) Ca. 230 Ma indicates the vital tectonic regime transition from compression to extension response to slab break-off and continued lithospheric delamination. (3) Ca. 216 Ma mark the beginning of the final stage of orogeny in the EKOB, and mild magmatism lasts to ca. 200 Ma in response to the mountain collapse. [ABSTRACT FROM AUTHOR]
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=enr&AN=176721380
RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1080/00206814.2023.2251547
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      – Code: eng
        Text: English
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        PageCount: 23
        StartPage: 1815
    Subjects:
      – SubjectFull: Volcanism
        Type: general
      – SubjectFull: Volcanic ash, tuff, etc.
        Type: general
      – SubjectFull: Ocean
        Type: general
      – SubjectFull: Orogenic belts
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      – SubjectFull: Volcanology
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      – SubjectFull: Orogeny
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      – SubjectFull: Kunlun Mountains (China & India)
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      – SubjectFull: China
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      – TitleFull: Three episodes of Triassic volcanism in the Eastern Kunlun Orogen, NW China: constraints for evolution of the Palaeo-Tethys Ocean.
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            – D: 15
              M: 05
              Text: May2024
              Type: published
              Y: 2024
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