Zircon chemistry of the late cretaceous-eocene granites from Tengchong block: insights into the genesis of host magmas.
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| Title: | Zircon chemistry of the late cretaceous-eocene granites from Tengchong block: insights into the genesis of host magmas. |
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| Authors: | Sun, Zhuanrong1 (AUTHOR) sunzr2011@163.com, Dong, Guochen2 (AUTHOR), Guo, Jianheng1 (AUTHOR), Wang, Zhongbao1 (AUTHOR) |
| Source: | Mineralogy & Petrology. Jun2025, Vol. 119 Issue 2, p231-242. 12p. |
| Subjects: | Earth sciences, Sphene, Plagioclase, Geology, Zircon |
| Abstract: | The Tengchong Block is notable for its diverse granitic intrusions and associated tin deposits. This study investigates the chemical compositions of zircons from the Late Cretaceous Guyong pluton and Eocene Lailishan pluton in the Tengchong Block to elucidate magmatic processes and sources, and their implications for tin mineralization. The zircons are characterized by long-prismatic shapes and oscillatory zoning, relatively high Hf concentrations (> 5000 ppm) and Th/U ratios ranging from 0.20 to 1.97, and low Eu/Eu* [= EuN/(SmN×GdN)0.5; where the subscript N denotes chondrite-normalised mass fractions] ratios of 0.02–0.40. Both the Guyong and Lailishan granites underwent significant differentiation, as evidenced by variations in zircon chemistry with increasing Hf concentrations. The wide range of Ti-in-zircon temperatures (870–650 ℃), along with decreasing Ti contents and Th/U ratios, suggests progressive cooling and fractional crystallization from the point of zircon saturation to the final solidification of the magma. The declining Dy/Yb ratios point to the fractionation of hornblende or titanite, while the reduction in Eu/Eu* ratios implies plagioclase fractionation. The relatively high U/Yb ratios (0.23–6.40) confirm a crustal magma source for these granites. Additionally, the pronounced negative Eu anomaly and the varying Ce/Ce* [= CeN/(LaN×PrN)0.5] ratios of 6–400 without a clear correlation with ΔFMQ [fayalite-magnetite-quartz buffer] indicate that high magmatic differentiation, rather than a reducing environment, may have been the primary factor influencing in tin mineralization. [ABSTRACT FROM AUTHOR] |
| Copyright of Mineralogy & Petrology 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.) | |
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| Items | – Name: Title Label: Title Group: Ti Data: Zircon chemistry of the late cretaceous-eocene granites from Tengchong block: insights into the genesis of host magmas. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Sun%2C+Zhuanrong%22">Sun, Zhuanrong</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> sunzr2011@163.com</i><br /><searchLink fieldCode="AR" term="%22Dong%2C+Guochen%22">Dong, Guochen</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Guo%2C+Jianheng%22">Guo, Jianheng</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wang%2C+Zhongbao%22">Wang, Zhongbao</searchLink><relatesTo>1</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Mineralogy+%26+Petrology%22">Mineralogy & Petrology</searchLink>. Jun2025, Vol. 119 Issue 2, p231-242. 12p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Earth+sciences%22">Earth sciences</searchLink><br /><searchLink fieldCode="DE" term="%22Sphene%22">Sphene</searchLink><br /><searchLink fieldCode="DE" term="%22Plagioclase%22">Plagioclase</searchLink><br /><searchLink fieldCode="DE" term="%22Geology%22">Geology</searchLink><br /><searchLink fieldCode="DE" term="%22Zircon%22">Zircon</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: The Tengchong Block is notable for its diverse granitic intrusions and associated tin deposits. This study investigates the chemical compositions of zircons from the Late Cretaceous Guyong pluton and Eocene Lailishan pluton in the Tengchong Block to elucidate magmatic processes and sources, and their implications for tin mineralization. The zircons are characterized by long-prismatic shapes and oscillatory zoning, relatively high Hf concentrations (> 5000 ppm) and Th/U ratios ranging from 0.20 to 1.97, and low Eu/Eu* [= EuN/(SmN×GdN)0.5; where the subscript N denotes chondrite-normalised mass fractions] ratios of 0.02–0.40. Both the Guyong and Lailishan granites underwent significant differentiation, as evidenced by variations in zircon chemistry with increasing Hf concentrations. The wide range of Ti-in-zircon temperatures (870–650 ℃), along with decreasing Ti contents and Th/U ratios, suggests progressive cooling and fractional crystallization from the point of zircon saturation to the final solidification of the magma. The declining Dy/Yb ratios point to the fractionation of hornblende or titanite, while the reduction in Eu/Eu* ratios implies plagioclase fractionation. The relatively high U/Yb ratios (0.23–6.40) confirm a crustal magma source for these granites. Additionally, the pronounced negative Eu anomaly and the varying Ce/Ce* [= CeN/(LaN×PrN)0.5] ratios of 6–400 without a clear correlation with ΔFMQ [fayalite-magnetite-quartz buffer] indicate that high magmatic differentiation, rather than a reducing environment, may have been the primary factor influencing in tin mineralization. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Mineralogy & Petrology 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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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1007/s00710-025-00920-6 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 12 StartPage: 231 Subjects: – SubjectFull: Earth sciences Type: general – SubjectFull: Sphene Type: general – SubjectFull: Plagioclase Type: general – SubjectFull: Geology Type: general – SubjectFull: Zircon Type: general Titles: – TitleFull: Zircon chemistry of the late cretaceous-eocene granites from Tengchong block: insights into the genesis of host magmas. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Sun, Zhuanrong – PersonEntity: Name: NameFull: Dong, Guochen – PersonEntity: Name: NameFull: Guo, Jianheng – PersonEntity: Name: NameFull: Wang, Zhongbao IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 06 Text: Jun2025 Type: published Y: 2025 Identifiers: – Type: issn-print Value: 09300708 Numbering: – Type: volume Value: 119 – Type: issue Value: 2 Titles: – TitleFull: Mineralogy & Petrology Type: main |
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