Petrogenesis of the Late Carboniferous Trondhjemite in Central Inner Mongolia in North China and Constraints of Intra-Oceanic Subduction in the Southern Paleo-Asian Ocean
Intra-oceanic subduction is a fundamental process on Earth, the study of which can improve the understanding of plate tectonic processes and the history of continental growth. Here, we report on newly recognized trondhjemite in the north of Diyanmiao ophiolite belt in North China. The trondhjemite w...
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MDPI AG
2022-09-01
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| Series: | Minerals |
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| Online Access: | https://www.mdpi.com/2075-163X/12/10/1212 |
| _version_ | 1797471109086445568 |
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| author | Peipei Dong Yingjie Li Yan Xie Jinfang Wang Hongyang Li |
| author_facet | Peipei Dong Yingjie Li Yan Xie Jinfang Wang Hongyang Li |
| author_sort | Peipei Dong |
| collection | DOAJ |
| description | Intra-oceanic subduction is a fundamental process on Earth, the study of which can improve the understanding of plate tectonic processes and the history of continental growth. Here, we report on newly recognized trondhjemite in the north of Diyanmiao ophiolite belt in North China. The trondhjemite was found along the Erenhot-Hegenshan suture zone. U-Pb zircon dating revealed that the trondhjemite crystallized at 309 ± 2.1 Ma. The trondhjemite had a high amount of SiO<sub>2</sub> (68.94–76.45 wt %), Al<sub>2</sub>O<sub>3</sub> (13.37–15.90 wt %), and Sr (232–601 ppm); and a low amount of K<sub>2</sub>O (1.57–2.70 wt %), Y (6.91–9.39 ppm), Ni (1.10–4.19 ppm), and Cr (1.55–13.50 ppm). The Na<sub>2</sub>O/K<sub>2</sub>O ratios were 1.90–4.37. There was a lack of negative Eu anomalies. It was relatively enriched in large-ion lithophile elements (LILEs) such as Rb, Ba, K, and Sr; was depleted in high-field-strength elements (HFSEs) such as Nb, Ta, Ti, and P; and had low total rare-earth element (REE) contents (27.73–49.63 ppm) with distinct REE fractionation (chondrite-normalized (La/Yb)<sub>N</sub> of 5.76–10.52), which was similar to adakitic rocks formed by partial melting of subducted oceanic crust. The trondhjemite, together with Diyanmiao ophiolite (335.6 Ma), may have formed during the stages of intra-oceanic subduction, suggesting that in the Early Carboniferous–Late Carboniferous, the southern Paleo-Asian Ocean was in its subduction stage. |
| first_indexed | 2024-03-09T19:44:53Z |
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| institution | Directory Open Access Journal |
| issn | 2075-163X |
| language | English |
| last_indexed | 2024-03-09T19:44:53Z |
| publishDate | 2022-09-01 |
| publisher | MDPI AG |
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| series | Minerals |
| spelling | doaj.art-ee6add124d3442c0af6a28b511ff26df2023-11-24T01:28:50ZengMDPI AGMinerals2075-163X2022-09-011210121210.3390/min12101212Petrogenesis of the Late Carboniferous Trondhjemite in Central Inner Mongolia in North China and Constraints of Intra-Oceanic Subduction in the Southern Paleo-Asian OceanPeipei Dong0Yingjie Li1Yan Xie2Jinfang Wang3Hongyang Li4College of Earth Sciences, Heibei GEO University, Shijiazhuang 050031, ChinaCollege of Earth Sciences, Heibei GEO University, Shijiazhuang 050031, ChinaInner Mongolia Mining Exploitation Co., Ltd., Hohhot 010020, ChinaCollege of Earth Sciences, Heibei GEO University, Shijiazhuang 050031, ChinaCollege of Earth Sciences, Heibei GEO University, Shijiazhuang 050031, ChinaIntra-oceanic subduction is a fundamental process on Earth, the study of which can improve the understanding of plate tectonic processes and the history of continental growth. Here, we report on newly recognized trondhjemite in the north of Diyanmiao ophiolite belt in North China. The trondhjemite was found along the Erenhot-Hegenshan suture zone. U-Pb zircon dating revealed that the trondhjemite crystallized at 309 ± 2.1 Ma. The trondhjemite had a high amount of SiO<sub>2</sub> (68.94–76.45 wt %), Al<sub>2</sub>O<sub>3</sub> (13.37–15.90 wt %), and Sr (232–601 ppm); and a low amount of K<sub>2</sub>O (1.57–2.70 wt %), Y (6.91–9.39 ppm), Ni (1.10–4.19 ppm), and Cr (1.55–13.50 ppm). The Na<sub>2</sub>O/K<sub>2</sub>O ratios were 1.90–4.37. There was a lack of negative Eu anomalies. It was relatively enriched in large-ion lithophile elements (LILEs) such as Rb, Ba, K, and Sr; was depleted in high-field-strength elements (HFSEs) such as Nb, Ta, Ti, and P; and had low total rare-earth element (REE) contents (27.73–49.63 ppm) with distinct REE fractionation (chondrite-normalized (La/Yb)<sub>N</sub> of 5.76–10.52), which was similar to adakitic rocks formed by partial melting of subducted oceanic crust. The trondhjemite, together with Diyanmiao ophiolite (335.6 Ma), may have formed during the stages of intra-oceanic subduction, suggesting that in the Early Carboniferous–Late Carboniferous, the southern Paleo-Asian Ocean was in its subduction stage.https://www.mdpi.com/2075-163X/12/10/1212trondhjemiteophioliteintra-oceanic subductionlate CarboniferousPaleo-Asian OceanInner Mongolia |
| spellingShingle | Peipei Dong Yingjie Li Yan Xie Jinfang Wang Hongyang Li Petrogenesis of the Late Carboniferous Trondhjemite in Central Inner Mongolia in North China and Constraints of Intra-Oceanic Subduction in the Southern Paleo-Asian Ocean Minerals trondhjemite ophiolite intra-oceanic subduction late Carboniferous Paleo-Asian Ocean Inner Mongolia |
| title | Petrogenesis of the Late Carboniferous Trondhjemite in Central Inner Mongolia in North China and Constraints of Intra-Oceanic Subduction in the Southern Paleo-Asian Ocean |
| title_full | Petrogenesis of the Late Carboniferous Trondhjemite in Central Inner Mongolia in North China and Constraints of Intra-Oceanic Subduction in the Southern Paleo-Asian Ocean |
| title_fullStr | Petrogenesis of the Late Carboniferous Trondhjemite in Central Inner Mongolia in North China and Constraints of Intra-Oceanic Subduction in the Southern Paleo-Asian Ocean |
| title_full_unstemmed | Petrogenesis of the Late Carboniferous Trondhjemite in Central Inner Mongolia in North China and Constraints of Intra-Oceanic Subduction in the Southern Paleo-Asian Ocean |
| title_short | Petrogenesis of the Late Carboniferous Trondhjemite in Central Inner Mongolia in North China and Constraints of Intra-Oceanic Subduction in the Southern Paleo-Asian Ocean |
| title_sort | petrogenesis of the late carboniferous trondhjemite in central inner mongolia in north china and constraints of intra oceanic subduction in the southern paleo asian ocean |
| topic | trondhjemite ophiolite intra-oceanic subduction late Carboniferous Paleo-Asian Ocean Inner Mongolia |
| url | https://www.mdpi.com/2075-163X/12/10/1212 |
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