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Occurrence of Middle Miocene Fossil Cyprinid Fish in the Northern Qaidam Basin and its Paleoenvironmental Implications
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We sincerely thank Prof. Meemann Chang, Prof. Jin Men for valuable advice for fossil identification, Bin Chen for taking the photographs of the fossils, and Xianyin An, Liang Luo, Yuanyuan Sun, Zhiyuan Liu, Lijun Wang for field assistance. This work is funded by the Foundation of the Geological Survey of China (No.1212011121261), the National Natural Science Youth Foundation of China (Nos. 41702118, 41702363 and 41602037), the China Postdoctoral Science Foundation (Nos. 2014M552109 and 2015M582301). We thank the two anonymous reviews for their constructive suggestions that improved this manuscript.

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    Abstract:

    With a thick sequence of early Eocene to Pleistocene terrestrial records, the Qaidam Basin on the northern Tibetan Plateau provides an important sedimentary archive for understanding the paleoenvironmental evolution of the northeast Tibetan Plateau. In this study, specimens of fossil fish remains are collected from the late Middle Miocene (Serravallian, ~12Ma) of the middle member of the Shang Youshashan Formation, Dahonggou (DHG) section, in the northern Qaidam Basin. Based on a systematic study of these materials, the remains have assigned to Cyprinidae, with typical pharyngeal teeth and dorsal fin spines with serrations on the posterior edge. Our discovery improves understanding of the cyprinid fish distribution characteristics in the Qaidam Basin during the Cenozoic. Co-occurrences of terrestrial brackish ostracod species Cyprideis and long chain alkenonesin the layer indicate that the studied cyprinid fish lived in a generally large brackish to saline water body during the late middle Miocene (Serravallian), when the climate of Qaidam Basin was still not sufficiently dry to form an extreme saline water lake.

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SONG Bowen, ZHANG Kexin, JI Junliang, HAN Fang, WANG Chaowen, WANG Jiaxuan, AI Keke.2017. Occurrence of Middle Miocene Fossil Cyprinid Fish in the Northern Qaidam Basin and its Paleoenvironmental Implications[J]. Acta Geologica Sinica(),91(5):1530-1541

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History
  • Received:December 27,2016
  • Revised:April 05,2017
  • Online: October 23,2017
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