Petrogenesis and Tectonic Setting of the Early and Middle Jurassic Granitoids in the Chaihe Area, Central Great Xing’an Range, NE China
To ascertain the Early-to-Middle Jurassic tectonic setting in the central Great Xing’an Range, this study investigated the Early and Middle Jurassic granitoids exposed in the Chaihe area in the central Great Xing’an Range based on isotopic chronology and petrogeochemistry. The results of this study...
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MDPI AG
2023-07-01
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| Series: | Minerals |
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| Online Access: | https://www.mdpi.com/2075-163X/13/7/917 |
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| author | Lu Shi Nan Ju Yuhui Feng Changqing Zheng Yue Wu Xin Liu |
| author_facet | Lu Shi Nan Ju Yuhui Feng Changqing Zheng Yue Wu Xin Liu |
| author_sort | Lu Shi |
| collection | DOAJ |
| description | To ascertain the Early-to-Middle Jurassic tectonic setting in the central Great Xing’an Range, this study investigated the Early and Middle Jurassic granitoids exposed in the Chaihe area in the central Great Xing’an Range based on isotopic chronology and petrogeochemistry. The results of this study show that the Early and Middle Jurassic granitoids have emplacement ages of 179–172 Ma. Moreover, the Early and Middle Jurassic granitoids are high-K calc-alkaline unfractionated I-type granitoids and high-K calc-alkaline fractionated I-type granitoids, respectively. The magma sources of the Early and Middle Jurassic granitoids both originated from the partial melting of newly accreted lower crustal basaltic rocks. Meanwhile, the Middle Jurassic magma sources were mixed with mantle-derived materials or ocean-floor sediments formed by the dehydration and metasomatism of subducted slabs. The Early and Middle Jurassic granitoids in the study area were formed in the subduction environment of the oceanic crust, in which the Mongol-Okhotsk oceanic plate was subducted southward beneath the Eerguna and Xing’an blocks. Moreover, the Siberian plate began to collide and converge with northeast China during the Middle Jurassic. |
| first_indexed | 2024-03-11T00:47:32Z |
| format | Article |
| id | doaj.art-08858e37f6614df9a968ea8d27f6ea5e |
| institution | Directory Open Access Journal |
| issn | 2075-163X |
| language | English |
| last_indexed | 2024-03-11T00:47:32Z |
| publishDate | 2023-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Minerals |
| spelling | doaj.art-08858e37f6614df9a968ea8d27f6ea5e2023-11-18T20:38:50ZengMDPI AGMinerals2075-163X2023-07-0113791710.3390/min13070917Petrogenesis and Tectonic Setting of the Early and Middle Jurassic Granitoids in the Chaihe Area, Central Great Xing’an Range, NE ChinaLu Shi0Nan Ju1Yuhui Feng2Changqing Zheng3Yue Wu4Xin Liu5Shenyang Center of China Geological Survey, Shenyang 110034, ChinaShenyang Center of China Geological Survey, Shenyang 110034, ChinaCollege of Paleontology, Shenyang Normal University, Shenyang 110034, ChinaCollege of Earth Sciences, Jilin University, Changchun 130061, ChinaShenyang Center of China Geological Survey, Shenyang 110034, ChinaShenyang Center of China Geological Survey, Shenyang 110034, ChinaTo ascertain the Early-to-Middle Jurassic tectonic setting in the central Great Xing’an Range, this study investigated the Early and Middle Jurassic granitoids exposed in the Chaihe area in the central Great Xing’an Range based on isotopic chronology and petrogeochemistry. The results of this study show that the Early and Middle Jurassic granitoids have emplacement ages of 179–172 Ma. Moreover, the Early and Middle Jurassic granitoids are high-K calc-alkaline unfractionated I-type granitoids and high-K calc-alkaline fractionated I-type granitoids, respectively. The magma sources of the Early and Middle Jurassic granitoids both originated from the partial melting of newly accreted lower crustal basaltic rocks. Meanwhile, the Middle Jurassic magma sources were mixed with mantle-derived materials or ocean-floor sediments formed by the dehydration and metasomatism of subducted slabs. The Early and Middle Jurassic granitoids in the study area were formed in the subduction environment of the oceanic crust, in which the Mongol-Okhotsk oceanic plate was subducted southward beneath the Eerguna and Xing’an blocks. Moreover, the Siberian plate began to collide and converge with northeast China during the Middle Jurassic.https://www.mdpi.com/2075-163X/13/7/917central Great Xing’an RangeEarly and Middle Jurassicgranitoidspetrogenesissouthward subduction of the Mongol-Okhotsk oceanic plate |
| spellingShingle | Lu Shi Nan Ju Yuhui Feng Changqing Zheng Yue Wu Xin Liu Petrogenesis and Tectonic Setting of the Early and Middle Jurassic Granitoids in the Chaihe Area, Central Great Xing’an Range, NE China Minerals central Great Xing’an Range Early and Middle Jurassic granitoids petrogenesis southward subduction of the Mongol-Okhotsk oceanic plate |
| title | Petrogenesis and Tectonic Setting of the Early and Middle Jurassic Granitoids in the Chaihe Area, Central Great Xing’an Range, NE China |
| title_full | Petrogenesis and Tectonic Setting of the Early and Middle Jurassic Granitoids in the Chaihe Area, Central Great Xing’an Range, NE China |
| title_fullStr | Petrogenesis and Tectonic Setting of the Early and Middle Jurassic Granitoids in the Chaihe Area, Central Great Xing’an Range, NE China |
| title_full_unstemmed | Petrogenesis and Tectonic Setting of the Early and Middle Jurassic Granitoids in the Chaihe Area, Central Great Xing’an Range, NE China |
| title_short | Petrogenesis and Tectonic Setting of the Early and Middle Jurassic Granitoids in the Chaihe Area, Central Great Xing’an Range, NE China |
| title_sort | petrogenesis and tectonic setting of the early and middle jurassic granitoids in the chaihe area central great xing an range ne china |
| topic | central Great Xing’an Range Early and Middle Jurassic granitoids petrogenesis southward subduction of the Mongol-Okhotsk oceanic plate |
| url | https://www.mdpi.com/2075-163X/13/7/917 |
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