Abstract The complete early Cambrian Zhushadong Formation is developed in Dengfeng area,Henan Province,which record important information of paleoclimate variation. The lithology,element geochemistry,sedimentology and palaeontology are investigated to have a closer insight into the paleoclimate and environmental variations during deposition of the early Cambrian Zhushadong Formation of the western Henan. The results show that the Zhushadong Formation can be divided into three lithological members: Lower laminated dolomite Member,the upper leopard limestone Member and the top laminated dolomite Member. The paleoclimate variations are reflected by stratified dissolved pores,chert and gypsum in the laminated dolomites,intensive bioturbation in leopard limestones and multiple geochemical parameters,including Mn concentration,and the ratios of Sr/Cu,Rb/Sr and MgO/CaO. It displays a clear change from hot and arid climate of the lower laminated dolomite Member,to warm and humid climate of the upper leopard limestone Member,and back to hot and arid climate of the top laminated dolomite Member. The contemporaneous sediments in North China show the similar paleoclimate variations to the Zhushadong Formation in western Henan Province.
Fund:Financially supported by the National Natural Science Foundation of China(No.41872111)
Corresponding Authors:
Qi Yong-An,born in 1963,professor,is engaged in researches on trace fossils and geobiology. E-mail: qiya@hpu.edu.cn.
About author: Fan Yu-Chao,born in 1987,a Ph.D. candidate,is engaged in research on geobiology. E-mail: fanyuchao1126@163.com.
Cite this article:
Fan Yu-Chao,Qi Yong-An,Dai Ming-Yue et al. Paleoclimate evolution recorded in the Cambrian Epoch 2 Zhushadong Formation from Dengfeng area, western Henan Province[J]. JOPC, 2020, 22(2): 367-376.
Fan Yu-Chao,Qi Yong-An,Dai Ming-Yue et al. Paleoclimate evolution recorded in the Cambrian Epoch 2 Zhushadong Formation from Dengfeng area, western Henan Province[J]. JOPC, 2020, 22(2): 367-376.
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