Geochronology and geochemistry of Early Cretaceous granitic plutons in northern Great Xing’an Range, NE China, and implications for geodynamic setting
Early Cretaceous granitic rocks are widely distributed in the Great Xing’an Range, northeast China. However, their precise age and tectonic evolution remain controversial. This study presents new zircon U–Pb, Lu–Hf, and whole-rock geochemical data for the granitic plutons in the Yili area, Xing’an M...
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| Format: | Article |
| Language: | English |
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De Gruyter
2022-10-01
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| Series: | Open Geosciences |
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| Online Access: | https://doi.org/10.1515/geo-2022-0422 |
| _version_ | 1811194119320502272 |
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| author | Luo Niangang Gao Lianfeng Zhang Jing Zhang Zhenguo Wu Junfei Cui Jianyu Xing Jie |
| author_facet | Luo Niangang Gao Lianfeng Zhang Jing Zhang Zhenguo Wu Junfei Cui Jianyu Xing Jie |
| author_sort | Luo Niangang |
| collection | DOAJ |
| description | Early Cretaceous granitic rocks are widely distributed in the Great Xing’an Range, northeast China. However, their precise age and tectonic evolution remain controversial. This study presents new zircon U–Pb, Lu–Hf, and whole-rock geochemical data for the granitic plutons in the Yili area, Xing’an Massif, northern Great Xing’an Range. The aim of this study was to decipher the tectono-thermal history and obtain further understanding of the geodynamic setting of the large-scale Late Mesozoic magmatism in the Great Xing’an Range. Zircon U–Pb age dating indicated that the plutons were emplaced during the Early Cretaceous, with ages of 132.2–130.1 Ma. The plutons showed similar geochemical features, characterized by high concentrations of SiO2 and Na2O + K2O and low concentrations of P2O5, CaO, MgO, and TFe2O3. The plutons were enriched in light rare earth elements and large ion lithophile elements and depleted in heavy earth elements and high-field-strength elements. Such features indicate that the plutons are highly fractionated with I-type granite affinity. These findings, combined with pluton ε
Hf(t) values of + 5.25 to + 8.28 and two-stage model ages (t
DM2) of 661–855 Ma, indicate that the primary magmas originated from partial melting of juvenile basaltic crustal material accreted during the Neoproterozoic. These results combined with regional geological evolution indicated that the generation of Early Cretaceous plutons in the northern Great Xing’an Range might be closely related to the post-collisional gravitational collapse and subsequent extension resulting from the closure of the Mongolia-Okhotsk Ocean. Their generation also superimposed the back-arc extension resulting from retraction of the Paleo-Pacific subduction plate. |
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| format | Article |
| id | doaj.art-ced47395fd8d4ca3afd78f2876176566 |
| institution | Directory Open Access Journal |
| issn | 2391-5447 |
| language | English |
| last_indexed | 2024-04-12T00:21:42Z |
| publishDate | 2022-10-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Open Geosciences |
| spelling | doaj.art-ced47395fd8d4ca3afd78f28761765662022-12-22T03:55:43ZengDe GruyterOpen Geosciences2391-54472022-10-011411206123710.1515/geo-2022-0422Geochronology and geochemistry of Early Cretaceous granitic plutons in northern Great Xing’an Range, NE China, and implications for geodynamic settingLuo Niangang0Gao Lianfeng1Zhang Jing2Zhang Zhenguo3Wu Junfei4Cui Jianyu5Xing Jie6College of Mining Engineering, Liaoning Technical University, 47 Zhonghua Road, Fuxin, 123000, ChinaCollege of Mining Engineering, Liaoning Technical University, 47 Zhonghua Road, Fuxin, 123000, ChinaShenyang Center of Geological Survey, China Geological Survey, Shenyang, 110034, ChinaCollege of Mining Engineering, Liaoning Technical University, 47 Zhonghua Road, Fuxin, 123000, ChinaInner Mongolia Pingzhuang Coal Industry (Group) Co., Ltd, Chifeng, 204000, ChinaLiaoning Provincial Geological and Mineral Survey Institute Co., Ltd, Shenyang, 110031, ChinaCollege of Mining Engineering, Liaoning Technical University, 47 Zhonghua Road, Fuxin, 123000, ChinaEarly Cretaceous granitic rocks are widely distributed in the Great Xing’an Range, northeast China. However, their precise age and tectonic evolution remain controversial. This study presents new zircon U–Pb, Lu–Hf, and whole-rock geochemical data for the granitic plutons in the Yili area, Xing’an Massif, northern Great Xing’an Range. The aim of this study was to decipher the tectono-thermal history and obtain further understanding of the geodynamic setting of the large-scale Late Mesozoic magmatism in the Great Xing’an Range. Zircon U–Pb age dating indicated that the plutons were emplaced during the Early Cretaceous, with ages of 132.2–130.1 Ma. The plutons showed similar geochemical features, characterized by high concentrations of SiO2 and Na2O + K2O and low concentrations of P2O5, CaO, MgO, and TFe2O3. The plutons were enriched in light rare earth elements and large ion lithophile elements and depleted in heavy earth elements and high-field-strength elements. Such features indicate that the plutons are highly fractionated with I-type granite affinity. These findings, combined with pluton ε Hf(t) values of + 5.25 to + 8.28 and two-stage model ages (t DM2) of 661–855 Ma, indicate that the primary magmas originated from partial melting of juvenile basaltic crustal material accreted during the Neoproterozoic. These results combined with regional geological evolution indicated that the generation of Early Cretaceous plutons in the northern Great Xing’an Range might be closely related to the post-collisional gravitational collapse and subsequent extension resulting from the closure of the Mongolia-Okhotsk Ocean. Their generation also superimposed the back-arc extension resulting from retraction of the Paleo-Pacific subduction plate.https://doi.org/10.1515/geo-2022-0422great xing’an rangeearly cretaceousi-type granitemongol-okhotsk tectonic regimepaleo-pacific tectonic regime |
| spellingShingle | Luo Niangang Gao Lianfeng Zhang Jing Zhang Zhenguo Wu Junfei Cui Jianyu Xing Jie Geochronology and geochemistry of Early Cretaceous granitic plutons in northern Great Xing’an Range, NE China, and implications for geodynamic setting Open Geosciences great xing’an range early cretaceous i-type granite mongol-okhotsk tectonic regime paleo-pacific tectonic regime |
| title | Geochronology and geochemistry of Early Cretaceous granitic plutons in northern Great Xing’an Range, NE China, and implications for geodynamic setting |
| title_full | Geochronology and geochemistry of Early Cretaceous granitic plutons in northern Great Xing’an Range, NE China, and implications for geodynamic setting |
| title_fullStr | Geochronology and geochemistry of Early Cretaceous granitic plutons in northern Great Xing’an Range, NE China, and implications for geodynamic setting |
| title_full_unstemmed | Geochronology and geochemistry of Early Cretaceous granitic plutons in northern Great Xing’an Range, NE China, and implications for geodynamic setting |
| title_short | Geochronology and geochemistry of Early Cretaceous granitic plutons in northern Great Xing’an Range, NE China, and implications for geodynamic setting |
| title_sort | geochronology and geochemistry of early cretaceous granitic plutons in northern great xing an range ne china and implications for geodynamic setting |
| topic | great xing’an range early cretaceous i-type granite mongol-okhotsk tectonic regime paleo-pacific tectonic regime |
| url | https://doi.org/10.1515/geo-2022-0422 |
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