Petrology and geochemical characteristics of amphibolite facies rocks in Xunyangba area, South Qinling Orogen, Central China
As a tectonic block of the Qinling Orogenic Belt, Central China, the South Qinling Orogen is generally believed to have had a tight affinity with the Yangtze Block during the Precambrian. Knowledge on the South Qinling Orogen is important to constrain the tectonic evolution of the northern margin of...
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Frontiers Media S.A.
2023-01-01
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| Series: | Frontiers in Earth Science |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/feart.2022.1001795/full |
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| author | Juanjuan Kong Juanjuan Kong Lei Wang Lei Wang Yongxiang Yao Jinyan Lin Yuanyuan Xiao Yuanyuan Xiao Yuanyuan Xiao Yiting Yang |
| author_facet | Juanjuan Kong Juanjuan Kong Lei Wang Lei Wang Yongxiang Yao Jinyan Lin Yuanyuan Xiao Yuanyuan Xiao Yuanyuan Xiao Yiting Yang |
| author_sort | Juanjuan Kong |
| collection | DOAJ |
| description | As a tectonic block of the Qinling Orogenic Belt, Central China, the South Qinling Orogen is generally believed to have had a tight affinity with the Yangtze Block during the Precambrian. Knowledge on the South Qinling Orogen is important to constrain the tectonic evolution of the northern margin of the Yangtze Block basement. Previous studies mainly focused on the east segment of the South Qinling Orogen. This paper presented petrological, geochronological, and geochemical studies on the amphibolite-facies rocks newly discovered in the middle section of the South Qinling Orogen. Geochemical studies indicate that the protolith of these amphibolites is calc-alkaline island arc basalt, which was formed during the reconstruction of the Paleo-Middle Archean crust on the northern margin of the Yangtze Block 2,362 ± 100 Ma ago (equivalent to metamorphic rocks of the Yudongzi group). Later, these arc basalts experienced amphibolite-facies metamorphism at 1,500–1,800 Ma, which is consistent with the metamorphism identified in the Yangtze Block, confirming the association of the South Qinling Orogen with the Yangtze Block basement. Subsequently, these amphibolite-facies rocks further experienced three stages of metamorphism at c. 800 Ma, 440 Ma, and 200 Ma in the context of the northward subduction of the Yangtze Block. |
| first_indexed | 2024-04-10T23:33:00Z |
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| id | doaj.art-8a9929ad669544aebd3e4520b92edfbb |
| institution | Directory Open Access Journal |
| issn | 2296-6463 |
| language | English |
| last_indexed | 2024-04-10T23:33:00Z |
| publishDate | 2023-01-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Earth Science |
| spelling | doaj.art-8a9929ad669544aebd3e4520b92edfbb2023-01-12T04:21:09ZengFrontiers Media S.A.Frontiers in Earth Science2296-64632023-01-011010.3389/feart.2022.10017951001795Petrology and geochemical characteristics of amphibolite facies rocks in Xunyangba area, South Qinling Orogen, Central ChinaJuanjuan Kong0Juanjuan Kong1Lei Wang2Lei Wang3Yongxiang Yao4Jinyan Lin5Yuanyuan Xiao6Yuanyuan Xiao7Yuanyuan Xiao8Yiting Yang9College of Ocean Science and Engineering, Shandong University of Science and Technology, Qingdao, ChinaLaboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, ChinaDepartment of Geology, Northwest University, Xi’an, ChinaYanchang Oilfield Exploration and Development Technology Research Center, Yan’an, ChinaCAS Key Laboratory of Marine Geology and Environment, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, ChinaDepartment of Geology, Northwest University, Xi’an, ChinaLaboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, ChinaCAS Key Laboratory of Marine Geology and Environment, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, ChinaCenter for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao, ChinaCollege of Ocean Science and Engineering, Shandong University of Science and Technology, Qingdao, ChinaAs a tectonic block of the Qinling Orogenic Belt, Central China, the South Qinling Orogen is generally believed to have had a tight affinity with the Yangtze Block during the Precambrian. Knowledge on the South Qinling Orogen is important to constrain the tectonic evolution of the northern margin of the Yangtze Block basement. Previous studies mainly focused on the east segment of the South Qinling Orogen. This paper presented petrological, geochronological, and geochemical studies on the amphibolite-facies rocks newly discovered in the middle section of the South Qinling Orogen. Geochemical studies indicate that the protolith of these amphibolites is calc-alkaline island arc basalt, which was formed during the reconstruction of the Paleo-Middle Archean crust on the northern margin of the Yangtze Block 2,362 ± 100 Ma ago (equivalent to metamorphic rocks of the Yudongzi group). Later, these arc basalts experienced amphibolite-facies metamorphism at 1,500–1,800 Ma, which is consistent with the metamorphism identified in the Yangtze Block, confirming the association of the South Qinling Orogen with the Yangtze Block basement. Subsequently, these amphibolite-facies rocks further experienced three stages of metamorphism at c. 800 Ma, 440 Ma, and 200 Ma in the context of the northward subduction of the Yangtze Block.https://www.frontiersin.org/articles/10.3389/feart.2022.1001795/fullamphibolitezircon U–Pb agegeochemical characteristicsXunyangba areaSouthern Qinling Orogen |
| spellingShingle | Juanjuan Kong Juanjuan Kong Lei Wang Lei Wang Yongxiang Yao Jinyan Lin Yuanyuan Xiao Yuanyuan Xiao Yuanyuan Xiao Yiting Yang Petrology and geochemical characteristics of amphibolite facies rocks in Xunyangba area, South Qinling Orogen, Central China Frontiers in Earth Science amphibolite zircon U–Pb age geochemical characteristics Xunyangba area Southern Qinling Orogen |
| title | Petrology and geochemical characteristics of amphibolite facies rocks in Xunyangba area, South Qinling Orogen, Central China |
| title_full | Petrology and geochemical characteristics of amphibolite facies rocks in Xunyangba area, South Qinling Orogen, Central China |
| title_fullStr | Petrology and geochemical characteristics of amphibolite facies rocks in Xunyangba area, South Qinling Orogen, Central China |
| title_full_unstemmed | Petrology and geochemical characteristics of amphibolite facies rocks in Xunyangba area, South Qinling Orogen, Central China |
| title_short | Petrology and geochemical characteristics of amphibolite facies rocks in Xunyangba area, South Qinling Orogen, Central China |
| title_sort | petrology and geochemical characteristics of amphibolite facies rocks in xunyangba area south qinling orogen central china |
| topic | amphibolite zircon U–Pb age geochemical characteristics Xunyangba area Southern Qinling Orogen |
| url | https://www.frontiersin.org/articles/10.3389/feart.2022.1001795/full |
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