Permian radiolarians from the Engeerwusu suture zone in Alxa area of Inner Mongolia and its geological significance

XIE Li; YIN Hai-quan; ZHOU Hong-rui; ZHANG Wei-jie

doi:10.12097/gbc.20140510

Geological Bulletin of China > 2014 > 33(5): 691-697. > DOI: 10.12097/gbc.20140510

XIE Li, YIN Hai-quan, ZHOU Hong-rui, ZHANG Wei-jie. 2014: Permian radiolarians from the Engeerwusu suture zone in Alxa area of Inner Mongolia and its geological significance. Geological Bulletin of China, 33(5): 691-697. DOI: 10.12097/gbc.20140510

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Permian radiolarians from the Engeerwusu suture zone in Alxa area of Inner Mongolia and its geological significance

Geological Museum, China University of Geosciences, Beijing 100083, China;2. School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China

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Details of Permian albaillellarians from the exotic siliceous blocks within the Engeerwusu ophiolitic mélange along the Engeerwusu suture zone are presented for the first time. Among them, seven species belonging to three genera were systemically investigated. Most species recorded can be correlated with the Permian radiolarian zones in Japan and the USA. Two radiolarian assemblages were distinguished, indicative of Early Permian and late Middle to early Late Permian respectively. On the basis of the deep-water settings indicated by the albaillellarian fauna, the radiolarians extracted from the exotic siliceous blocks within the Engeerwusu ophiolitic mélange along the Engeerwusu suture zone may provide new evidence for the tectonic evolution of the Engeerwusu suture zone between the North China Plate and the Tarim Plate. According to the deep-water setting indicated by the latest radiolarian assemblage of late Middle-early Late Permian epoch, the authors hold that an ocean existed between the North China Plate and the Tarim Plate during late Middle to early Late Permian, and the closure of the ocean between the North China Plate and the Tarim Plate might have occurred during late Late Permian period.
- Permian,
- Late Permian,
- radiolarians,
- ophiolitic mélange,
- Engeerwusu suture zone,
- Inner Mongolia

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Permian radiolarians from the Engeerwusu suture zone in Alxa area of Inner Mongolia and its geological significance

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Permian radiolarians from the Engeerwusu suture zone in Alxa area of Inner Mongolia and its geological significance

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