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Yangshan A-Type Granites in the Lower Yangtze River Belt Formed by Ridge Subduction: Radiogenic Ca and Nd Isotopic Constraints.

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Title: Yangshan A-Type Granites in the Lower Yangtze River Belt Formed by Ridge Subduction: Radiogenic Ca and Nd Isotopic Constraints.
Authors: Bai, Jianghao1,2,3 (AUTHOR), Ling, Mingxing4 (AUTHOR) mxling@ecut.edu.cn, Yang, Xiaoyong5 (AUTHOR), Liu, Fang6 (AUTHOR), Gu, Huangling7 (AUTHOR), Luo, Zebin1,2,3 (AUTHOR), Jiang, Xiaoyan8 (AUTHOR), Zhang, Zhaofeng1,6 (AUTHOR) zzf@cdut.edu.cn
Source: Journal of Earth Science. Jun2022, Vol. 33 Issue 3, p581-590. 10p.
Subject Terms: *Granite, *Subduction, *Syenite, *Porphyry, *Geodynamics, *Isotopic analysis
Geographic Terms: China
Abstract: The Early Cretaceous aluminous A-type granites in the Lower Yangtze River belt (LYRB) can provide important insights into the Mesozoic magmatism in eastern China, but their origin remains highly controversial. In this study, radiogenic Ca-Nd isotopic analysis was performed for syenite porphyry and alkali-feldspar granite porphyry of the Yangshan pluton, a typical aluminous A-type granitic intrusion in the LYRB, to constrain its source and geodynamic setting. The results show that εCa(126 Ma), εNd(126 Ma) and K/Casource of the syenite porphyry range from −0.24 to +0.96, −7.2 to −6.0, and 0.31 to 1.26, respectively. The corresponding values for the alkali-feldspar granite porphyry range from 0.26 to 0.84, −8.0 to −6.1, and 0.79 to 1.08, respectively. Binary mixing modeling indicates that they were originated from the same sources with different proportion, namely, a mixing of 50% to 75% Neoproterozoic crust and 50% to 25% asthenospheric mantle. Together with previous works, we propose that the Early Cretaceous subduction of the ridge between the Pacific and Izanagi plates was responsible for the formation of the aluminous A-type granites in the LYRB. [ABSTRACT FROM AUTHOR]
Database: Energy & Power Source
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DbLabel: Energy & Power Source
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  Label: Title
  Group: Ti
  Data: Yangshan A-Type Granites in the Lower Yangtze River Belt Formed by Ridge Subduction: Radiogenic Ca and Nd Isotopic Constraints.
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  Data: <searchLink fieldCode="AR" term="%22Bai%2C+Jianghao%22">Bai, Jianghao</searchLink><relatesTo>1,2,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ling%2C+Mingxing%22">Ling, Mingxing</searchLink><relatesTo>4</relatesTo> (AUTHOR)<i> mxling@ecut.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Yang%2C+Xiaoyong%22">Yang, Xiaoyong</searchLink><relatesTo>5</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Liu%2C+Fang%22">Liu, Fang</searchLink><relatesTo>6</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Gu%2C+Huangling%22">Gu, Huangling</searchLink><relatesTo>7</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Luo%2C+Zebin%22">Luo, Zebin</searchLink><relatesTo>1,2,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Jiang%2C+Xiaoyan%22">Jiang, Xiaoyan</searchLink><relatesTo>8</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhang%2C+Zhaofeng%22">Zhang, Zhaofeng</searchLink><relatesTo>1,6</relatesTo> (AUTHOR)<i> zzf@cdut.edu.cn</i>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Earth+Science%22">Journal of Earth Science</searchLink>. Jun2022, Vol. 33 Issue 3, p581-590. 10p.
– Name: Subject
  Label: Subject Terms
  Group: Su
  Data: *<searchLink fieldCode="DE" term="%22Granite%22">Granite</searchLink><br />*<searchLink fieldCode="DE" term="%22Subduction%22">Subduction</searchLink><br />*<searchLink fieldCode="DE" term="%22Syenite%22">Syenite</searchLink><br />*<searchLink fieldCode="DE" term="%22Porphyry%22">Porphyry</searchLink><br />*<searchLink fieldCode="DE" term="%22Geodynamics%22">Geodynamics</searchLink><br />*<searchLink fieldCode="DE" term="%22Isotopic+analysis%22">Isotopic analysis</searchLink>
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  Label: Geographic Terms
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22China%22">China</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The Early Cretaceous aluminous A-type granites in the Lower Yangtze River belt (LYRB) can provide important insights into the Mesozoic magmatism in eastern China, but their origin remains highly controversial. In this study, radiogenic Ca-Nd isotopic analysis was performed for syenite porphyry and alkali-feldspar granite porphyry of the Yangshan pluton, a typical aluminous A-type granitic intrusion in the LYRB, to constrain its source and geodynamic setting. The results show that εCa(126 Ma), εNd(126 Ma) and K/Casource of the syenite porphyry range from −0.24 to +0.96, −7.2 to −6.0, and 0.31 to 1.26, respectively. The corresponding values for the alkali-feldspar granite porphyry range from 0.26 to 0.84, −8.0 to −6.1, and 0.79 to 1.08, respectively. Binary mixing modeling indicates that they were originated from the same sources with different proportion, namely, a mixing of 50% to 75% Neoproterozoic crust and 50% to 25% asthenospheric mantle. Together with previous works, we propose that the Early Cretaceous subduction of the ridge between the Pacific and Izanagi plates was responsible for the formation of the aluminous A-type granites in the LYRB. [ABSTRACT FROM AUTHOR]
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      – Type: doi
        Value: 10.1007/s12583-021-1588-7
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      – Code: eng
        Text: English
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        PageCount: 10
        StartPage: 581
    Subjects:
      – SubjectFull: Granite
        Type: general
      – SubjectFull: Subduction
        Type: general
      – SubjectFull: Syenite
        Type: general
      – SubjectFull: Porphyry
        Type: general
      – SubjectFull: Geodynamics
        Type: general
      – SubjectFull: Isotopic analysis
        Type: general
      – SubjectFull: China
        Type: general
    Titles:
      – TitleFull: Yangshan A-Type Granites in the Lower Yangtze River Belt Formed by Ridge Subduction: Radiogenic Ca and Nd Isotopic Constraints.
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            NameFull: Bai, Jianghao
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            NameFull: Ling, Mingxing
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            NameFull: Yang, Xiaoyong
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            NameFull: Liu, Fang
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            NameFull: Gu, Huangling
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            NameFull: Luo, Zebin
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            NameFull: Jiang, Xiaoyan
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            NameFull: Zhang, Zhaofeng
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            – D: 01
              M: 06
              Text: Jun2022
              Type: published
              Y: 2022
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              Value: 1674487X
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              Value: 33
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            – TitleFull: Journal of Earth Science
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