| 西藏申扎县格仁错北岸中上泥盆统查果罗玛组中发现中晚二叠世珊瑚化石 |
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| 关键词:Tibet Xainza County Xiala Formation Mujiucuo Formation Coral |
| 基金项目:国家自然科学基金项目(编号: 41472030);科技基础性工作专项(编号: 2015FY310100);中国地质调查局基础性公益性矿产地质调查项目(编号: DD20160120-02; DD20160120-04; DD20160126);中国地质科学院基本科研业务费项目(编号: J1607) |
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| 摘要: |
| The Newly Discovered Middle to Late Permian Coral Fauna in the Upper to Middle Devonian Chaguoluoma Formation from the Northern Geren Co Area in Xianza County, Tibet |
| Five genus and seven species corals were discovered for the first time in the limestone, which was previously thought to be of Middle–Upper Devonian Chaguoluoma Formation, on the north bank of Geren Co, in Xainza County of Tibet. These corals are Iranophyllum tunicatum Igo, Iranophyllum? sp., Neokueichowpora haydeni (Cowper Reed), Praewentzelella irregularis Wu et Zhao, Praewentzelella tibetica (Reed), Waagenophyllum indicum (Waagen et Wentzel), Wentzelella zhongbaensis Wu & Zhao. These corals suggest Middle to Late Permian in age instead of Middle to Late Devonian. According to the age of corals and the lithologic characteristics of the strata, the limestone was divided in to two parts: the lower part includes layer 1–11 of the section, which was assigned to the Middle Permian Xiala Formation, and the upper part above the layer 11 was regarded as the Upper Permian–Lower Triassic Mujiucuo Formation. The Mujiucuo Formation in the study area is composed of dolomites, dolomitic limestone, limestone, calcarenite, and calcirudyte, indicating the transitional facies between the evaporation carbonate platform and open carbonate platform facies. |
| SHI Qiu-yuan,JI Zhan-sheng,WU Gui-chun,SUN Qian,LI Hao,HE Ji-fu,LIU Zhen-yu,ZHANG Zhan-yun,ZHAO Zhan-fu,LIU Sheng-qing,GUO An-chen,HOU Zhao-shuo,LI Dong-ze.2018.The Newly Discovered Middle to Late Permian Coral Fauna in the Upper to Middle Devonian Chaguoluoma Formation from the Northern Geren Co Area in Xianza County, Tibet[J].Acta Geoscientica Sinica,39(4):453-462. |
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