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Zircon textural and elemental evidence for the thermal state of the Carboniferous Oytag pluton in the West Kunlun Orogenic Belt, northwest China.

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Title: Zircon textural and elemental evidence for the thermal state of the Carboniferous Oytag pluton in the West Kunlun Orogenic Belt, northwest China.
Authors: Yu, Bingjin1,2 (AUTHOR), Wang, Yanjun1 (AUTHOR) yjwang8807@163.com, Wei, Ying1 (AUTHOR), Wang, Shuilong1 (AUTHOR), Xu, Chuanlong1,2 (AUTHOR), Wu, Chengquan3 (AUTHOR), Zhu, Weiguang3 (AUTHOR), Leng, Chengbiao1,2 (AUTHOR) lcb8207@163.com
Source: Acta Geochimica. Jun2026, Vol. 45 Issue 3, p639-651. 13p.
Subjects: Zircon, Trace elements, Back-arc basins, Crystal growth, Magmas, Crystallization, Orogenic belts, Igneous intrusions
Geographic Terms: China
Abstract: This study presents new cathodoluminescence images and trace element data for zircon from the Carboniferous Oytag pluton in the West Kunlun Orogenic Belt, northwest China. We identify oscillatory and sector-zoned zircon grains that reflect equilibrium and disequilibrium crystal growth within the same trondhjemite pluton. The oscillatory zircon grains display negative correlations between Hf (10,638–13,648 ppm) and Ti (1.95–4.18 ppm) contents, highlighting the dominating role of fractionation in evolving magmas. In contrast, the sector-zoned zircon grains exhibit highly variable Ti contents (0.72–6.07 ppm) uncorrelated with Hf (8951–10,085 ppm), likely reflecting rapid cooling. At a fast growth rate with high undercooling, compatible elements (e.g., Hf) are not efficiently incorporated into the crystal lattice, while incompatible elements (e.g., Nb) are not promptly removed from the crystallizing front. Hf/Nb ratios in the light prismatic sectors are higher than those in the dark pyramidal sectors but overlap with those in the equilibrium oscillatory zircon. It is suggested that the light prismatic sectors are closer to the equilibrium with melts than dark pyramidal sectors. We attribute the formation of sector-zoned and oscillatory zircon to fast and slow cooling rates at the margin and interior of the Oytag pluton, respectively. We further infer that early, small magmatic systems may solidify at faster cooling rates than their postdating counterparts during the development of the Oytag back-arc basin. [ABSTRACT FROM AUTHOR]
Copyright of Acta Geochimica is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
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  Data: Zircon textural and elemental evidence for the thermal state of the Carboniferous Oytag pluton in the West Kunlun Orogenic Belt, northwest China.
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  Data: <searchLink fieldCode="AR" term="%22Yu%2C+Bingjin%22">Yu, Bingjin</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wang%2C+Yanjun%22">Wang, Yanjun</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> yjwang8807@163.com</i><br /><searchLink fieldCode="AR" term="%22Wei%2C+Ying%22">Wei, Ying</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wang%2C+Shuilong%22">Wang, Shuilong</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Xu%2C+Chuanlong%22">Xu, Chuanlong</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wu%2C+Chengquan%22">Wu, Chengquan</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhu%2C+Weiguang%22">Zhu, Weiguang</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Leng%2C+Chengbiao%22">Leng, Chengbiao</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> lcb8207@163.com</i>
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  Data: This study presents new cathodoluminescence images and trace element data for zircon from the Carboniferous Oytag pluton in the West Kunlun Orogenic Belt, northwest China. We identify oscillatory and sector-zoned zircon grains that reflect equilibrium and disequilibrium crystal growth within the same trondhjemite pluton. The oscillatory zircon grains display negative correlations between Hf (10,638–13,648 ppm) and Ti (1.95–4.18 ppm) contents, highlighting the dominating role of fractionation in evolving magmas. In contrast, the sector-zoned zircon grains exhibit highly variable Ti contents (0.72–6.07 ppm) uncorrelated with Hf (8951–10,085 ppm), likely reflecting rapid cooling. At a fast growth rate with high undercooling, compatible elements (e.g., Hf) are not efficiently incorporated into the crystal lattice, while incompatible elements (e.g., Nb) are not promptly removed from the crystallizing front. Hf/Nb ratios in the light prismatic sectors are higher than those in the dark pyramidal sectors but overlap with those in the equilibrium oscillatory zircon. It is suggested that the light prismatic sectors are closer to the equilibrium with melts than dark pyramidal sectors. We attribute the formation of sector-zoned and oscillatory zircon to fast and slow cooling rates at the margin and interior of the Oytag pluton, respectively. We further infer that early, small magmatic systems may solidify at faster cooling rates than their postdating counterparts during the development of the Oytag back-arc basin. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
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  Data: <i>Copyright of Acta Geochimica is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1007/s11631-025-00841-3
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      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 13
        StartPage: 639
    Subjects:
      – SubjectFull: Zircon
        Type: general
      – SubjectFull: Trace elements
        Type: general
      – SubjectFull: Back-arc basins
        Type: general
      – SubjectFull: Crystal growth
        Type: general
      – SubjectFull: Magmas
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      – SubjectFull: Crystallization
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      – SubjectFull: Orogenic belts
        Type: general
      – SubjectFull: Igneous intrusions
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      – SubjectFull: China
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      – TitleFull: Zircon textural and elemental evidence for the thermal state of the Carboniferous Oytag pluton in the West Kunlun Orogenic Belt, northwest China.
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            NameFull: Yu, Bingjin
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              Text: Jun2026
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