Intra-oceanic subduction in the southeastern Paleo-Asian ocean: Evidence from early Permian gabbro of the Diyanmiao ophiolite in central Inner Mongolia, North China
Investigation of intra-oceanic subduction can improve our understanding of plate tectonic processes and the history of continental growth. Evidence for intra-oceanic subduction in the Paleo-Asian Ocean has recently become an important focus of research, including the Diyanmiao ophiolite in central I...
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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.2022.1031842/full |
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| author | Xiawei Zhang Xiawei Zhang Yingjie Li Yingjie Li Genhou Wang Shuai Wang Shuai Wang Xingrui Kong Xiaodong Wang Zhibin Liu |
| author_facet | Xiawei Zhang Xiawei Zhang Yingjie Li Yingjie Li Genhou Wang Shuai Wang Shuai Wang Xingrui Kong Xiaodong Wang Zhibin Liu |
| author_sort | Xiawei Zhang |
| collection | DOAJ |
| description | Investigation of intra-oceanic subduction can improve our understanding of plate tectonic processes and the history of continental growth. Evidence for intra-oceanic subduction in the Paleo-Asian Ocean has recently become an important focus of research, including the Diyanmiao ophiolite in central Inner Mongolia, North China. Here, we report a newly discovered occurrence of early Permian gabbro in the Diyanmiao ophiolite zone. The gabbro yields a weighted mean zircon U–Pb age of 294.4 ± 2.2 Ma. The gabbro samples are characterized by moderate SiO2 (47.32–50.51 wt%), low TiO2 (0.26–0.54 wt%) and K2O (0.04–0.75 wt%), and high Na2O (1.84–4.52 wt%) contents, high Na2O/K2O ratios (2.92–58.29), and depleted chondrite-normalized light rare Earth element patterns that are similar to N-MORB. The gabbros show slightly lower contents of high-field-strength elements (e.g., Nb, Ta, and Ti) and slightly higher contents of large-ion lithophile elements (e.g., K, Rb, Ba, and U) relative to N-MORB. In addition, the gabbros show high εNd (t) values (8.0–9.8) that are similar to those of forearc basalt in the Diyanmiao ophiolite and N-MORB. Integrating these new data with available results for ophiolite and arc-magmatic rocks of central Inner Mongolia, we propose that the studied gabbro was formed during the initial stage of intra-oceanic subduction and that the Paleo-Asian Ocean was still in a subduction setting during the early Permian. |
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| language | English |
| last_indexed | 2024-04-11T00:59:23Z |
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| spelling | doaj.art-09e8f0be8adb477194cf08264eccdadd2023-01-04T17:27:53ZengFrontiers Media S.A.Frontiers in Earth Science2296-64632023-01-011010.3389/feart.2022.10318421031842Intra-oceanic subduction in the southeastern Paleo-Asian ocean: Evidence from early Permian gabbro of the Diyanmiao ophiolite in central Inner Mongolia, North ChinaXiawei Zhang0Xiawei Zhang1Yingjie Li2Yingjie Li3Genhou Wang4Shuai Wang5Shuai Wang6Xingrui Kong7Xiaodong Wang8Zhibin Liu9School of the Earth Sciences and Resources, China University of Geosciences, Beijing, ChinaHebei Key Laboratory of Strategic Critical Mineral Resources, Heibei GEO University, Shijiazhuang, ChinaHebei Key Laboratory of Strategic Critical Mineral Resources, Heibei GEO University, Shijiazhuang, ChinaCollege of Earth Sciences, Hebei GEO University, Shijiazhuang, ChinaSchool of the Earth Sciences and Resources, China University of Geosciences, Beijing, ChinaSchool of the Earth Sciences and Resources, China University of Geosciences, Beijing, ChinaHebei Key Laboratory of Strategic Critical Mineral Resources, Heibei GEO University, Shijiazhuang, ChinaCollege of Earth Sciences, Hebei GEO University, Shijiazhuang, ChinaCollege of Earth Sciences, Hebei GEO University, Shijiazhuang, ChinaCollege of Earth Sciences, Hebei GEO University, Shijiazhuang, ChinaInvestigation of intra-oceanic subduction can improve our understanding of plate tectonic processes and the history of continental growth. Evidence for intra-oceanic subduction in the Paleo-Asian Ocean has recently become an important focus of research, including the Diyanmiao ophiolite in central Inner Mongolia, North China. Here, we report a newly discovered occurrence of early Permian gabbro in the Diyanmiao ophiolite zone. The gabbro yields a weighted mean zircon U–Pb age of 294.4 ± 2.2 Ma. The gabbro samples are characterized by moderate SiO2 (47.32–50.51 wt%), low TiO2 (0.26–0.54 wt%) and K2O (0.04–0.75 wt%), and high Na2O (1.84–4.52 wt%) contents, high Na2O/K2O ratios (2.92–58.29), and depleted chondrite-normalized light rare Earth element patterns that are similar to N-MORB. The gabbros show slightly lower contents of high-field-strength elements (e.g., Nb, Ta, and Ti) and slightly higher contents of large-ion lithophile elements (e.g., K, Rb, Ba, and U) relative to N-MORB. In addition, the gabbros show high εNd (t) values (8.0–9.8) that are similar to those of forearc basalt in the Diyanmiao ophiolite and N-MORB. Integrating these new data with available results for ophiolite and arc-magmatic rocks of central Inner Mongolia, we propose that the studied gabbro was formed during the initial stage of intra-oceanic subduction and that the Paleo-Asian Ocean was still in a subduction setting during the early Permian.https://www.frontiersin.org/articles/10.3389/feart.2022.1031842/fullgeochronologygabbroearly permianintra-oceanic subductionPaleo-Asian Ocean |
| spellingShingle | Xiawei Zhang Xiawei Zhang Yingjie Li Yingjie Li Genhou Wang Shuai Wang Shuai Wang Xingrui Kong Xiaodong Wang Zhibin Liu Intra-oceanic subduction in the southeastern Paleo-Asian ocean: Evidence from early Permian gabbro of the Diyanmiao ophiolite in central Inner Mongolia, North China Frontiers in Earth Science geochronology gabbro early permian intra-oceanic subduction Paleo-Asian Ocean |
| title | Intra-oceanic subduction in the southeastern Paleo-Asian ocean: Evidence from early Permian gabbro of the Diyanmiao ophiolite in central Inner Mongolia, North China |
| title_full | Intra-oceanic subduction in the southeastern Paleo-Asian ocean: Evidence from early Permian gabbro of the Diyanmiao ophiolite in central Inner Mongolia, North China |
| title_fullStr | Intra-oceanic subduction in the southeastern Paleo-Asian ocean: Evidence from early Permian gabbro of the Diyanmiao ophiolite in central Inner Mongolia, North China |
| title_full_unstemmed | Intra-oceanic subduction in the southeastern Paleo-Asian ocean: Evidence from early Permian gabbro of the Diyanmiao ophiolite in central Inner Mongolia, North China |
| title_short | Intra-oceanic subduction in the southeastern Paleo-Asian ocean: Evidence from early Permian gabbro of the Diyanmiao ophiolite in central Inner Mongolia, North China |
| title_sort | intra oceanic subduction in the southeastern paleo asian ocean evidence from early permian gabbro of the diyanmiao ophiolite in central inner mongolia north china |
| topic | geochronology gabbro early permian intra-oceanic subduction Paleo-Asian Ocean |
| url | https://www.frontiersin.org/articles/10.3389/feart.2022.1031842/full |
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