Petrogenesis of the Qiongduojiang Gabbro in Tethys Himalaya and Its Metallogenetic Implication
With the northward subduction and final closure of the Neo-Tethyan oceanic crust, the Indian and Eurasian plates finally collided together and underwent a strong collision orogenic event, resulting in large-scale crust–mantle magmatic interactions. In order to clarify the controversies about tectono...
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| Format: | Article |
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MDPI AG
2023-05-01
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| author | Jianzhong Li Yong Huang Qingsong Wu Li Zhang Tao Xiong Bing Wang Zhiqiang Liang Huawen Cao Wei Liang Zuowen Dai |
| author_facet | Jianzhong Li Yong Huang Qingsong Wu Li Zhang Tao Xiong Bing Wang Zhiqiang Liang Huawen Cao Wei Liang Zuowen Dai |
| author_sort | Jianzhong Li |
| collection | DOAJ |
| description | With the northward subduction and final closure of the Neo-Tethyan oceanic crust, the Indian and Eurasian plates finally collided together and underwent a strong collision orogenic event, resulting in large-scale crust–mantle magmatic interactions. In order to clarify the controversies about tectono-magmatic activities after the Indian–Eurasian continental collision, we report the newly dated Eocene Qiongduojiang gabbro explored in the Tethyan–Himalaya belt, southern Tibet. LA-ICP-MS zircon U-Pb dating shows that the crystallization age of the Qiongduojiang gabbro is 46.1 ± 1.7 Ma. The whole-rock major and trace elements, as well as Rb-Sr, Sm-Nd, and Pb isotopic data results, show that the Qiongduojiang gabbro is apparently depleted in Nd isotopes, is enriched in Pb isotopes, and has maintained a consistent <sup>87</sup>Sr/<sup>86</sup>Sr<sub>(t)</sub> value. This paper argues that the E-MORB-like Qiongduojiang gabbro originated from asthenosphere upwelling caused by slab breakoff of the Neo-Tethyan oceanic plate. This event caused large-scale magmatic activities, a magmatic mixing process between ancient crust and deep mantle, and wild distribution of Eocene Gangdese plutons along the Yarlung–Tsangpo Suture Zone, and it rendered the subduction-modified Tibetan lithosphere fertile from the Gangdese porphyry Cu deposits. |
| first_indexed | 2024-03-11T02:08:26Z |
| format | Article |
| id | doaj.art-947a58e198624f6fbb77028836c43330 |
| institution | Directory Open Access Journal |
| issn | 2075-163X |
| language | English |
| last_indexed | 2024-03-11T02:08:26Z |
| publishDate | 2023-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Minerals |
| spelling | doaj.art-947a58e198624f6fbb77028836c433302023-11-18T11:44:38ZengMDPI AGMinerals2075-163X2023-05-0113672110.3390/min13060721Petrogenesis of the Qiongduojiang Gabbro in Tethys Himalaya and Its Metallogenetic ImplicationJianzhong Li0Yong Huang1Qingsong Wu2Li Zhang3Tao Xiong4Bing Wang5Zhiqiang Liang6Huawen Cao7Wei Liang8Zuowen Dai9School of Earth Sciences, Chengdu University of Technology, Chengdu 610059, ChinaResearch Center of Applied Geology, China Geological Survey, Chengdu 610036, ChinaResearch Center of Applied Geology, China Geological Survey, Chengdu 610036, ChinaCheng Center, China Geological Survey, Chengdu 611230, ChinaResearch Center of Applied Geology, China Geological Survey, Chengdu 610036, ChinaResearch Center of Applied Geology, China Geological Survey, Chengdu 610036, ChinaResearch Center of Applied Geology, China Geological Survey, Chengdu 610036, ChinaCheng Center, China Geological Survey, Chengdu 611230, ChinaCheng Center, China Geological Survey, Chengdu 611230, ChinaSchool of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, ChinaWith the northward subduction and final closure of the Neo-Tethyan oceanic crust, the Indian and Eurasian plates finally collided together and underwent a strong collision orogenic event, resulting in large-scale crust–mantle magmatic interactions. In order to clarify the controversies about tectono-magmatic activities after the Indian–Eurasian continental collision, we report the newly dated Eocene Qiongduojiang gabbro explored in the Tethyan–Himalaya belt, southern Tibet. LA-ICP-MS zircon U-Pb dating shows that the crystallization age of the Qiongduojiang gabbro is 46.1 ± 1.7 Ma. The whole-rock major and trace elements, as well as Rb-Sr, Sm-Nd, and Pb isotopic data results, show that the Qiongduojiang gabbro is apparently depleted in Nd isotopes, is enriched in Pb isotopes, and has maintained a consistent <sup>87</sup>Sr/<sup>86</sup>Sr<sub>(t)</sub> value. This paper argues that the E-MORB-like Qiongduojiang gabbro originated from asthenosphere upwelling caused by slab breakoff of the Neo-Tethyan oceanic plate. This event caused large-scale magmatic activities, a magmatic mixing process between ancient crust and deep mantle, and wild distribution of Eocene Gangdese plutons along the Yarlung–Tsangpo Suture Zone, and it rendered the subduction-modified Tibetan lithosphere fertile from the Gangdese porphyry Cu deposits.https://www.mdpi.com/2075-163X/13/6/721Qiongduojiang gabbroEoceneTethyan−Himalaya beltTibetslab breakoffporphyry Cu deposits |
| spellingShingle | Jianzhong Li Yong Huang Qingsong Wu Li Zhang Tao Xiong Bing Wang Zhiqiang Liang Huawen Cao Wei Liang Zuowen Dai Petrogenesis of the Qiongduojiang Gabbro in Tethys Himalaya and Its Metallogenetic Implication Minerals Qiongduojiang gabbro Eocene Tethyan−Himalaya belt Tibet slab breakoff porphyry Cu deposits |
| title | Petrogenesis of the Qiongduojiang Gabbro in Tethys Himalaya and Its Metallogenetic Implication |
| title_full | Petrogenesis of the Qiongduojiang Gabbro in Tethys Himalaya and Its Metallogenetic Implication |
| title_fullStr | Petrogenesis of the Qiongduojiang Gabbro in Tethys Himalaya and Its Metallogenetic Implication |
| title_full_unstemmed | Petrogenesis of the Qiongduojiang Gabbro in Tethys Himalaya and Its Metallogenetic Implication |
| title_short | Petrogenesis of the Qiongduojiang Gabbro in Tethys Himalaya and Its Metallogenetic Implication |
| title_sort | petrogenesis of the qiongduojiang gabbro in tethys himalaya and its metallogenetic implication |
| topic | Qiongduojiang gabbro Eocene Tethyan−Himalaya belt Tibet slab breakoff porphyry Cu deposits |
| url | https://www.mdpi.com/2075-163X/13/6/721 |
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