Geochemical Characteristics and Sedimentary Environment Analysis from Datangpo Formation in Neoproterozoic Nanhua System, Southwestern Hunan Province-An Example from Zhaodong Manganese Ore Deposits in Jingzhou County, Hunan Province, China

被引：0
|
作者：
Li F. [1 ,2 ]
Lei Y. [3 ]
Gong G. [3 ]
Zhang H. [1 ,2 ]
Shen F. [1 ,2 ]
Jing X. [1 ,2 ]
Cheng X. [1 ,2 ]
机构：
[1] State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Chengdu
[2] Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu
[3] Hunan Geological Exploration Institute, China Metallurgical Geology Bureau, Changsha
来源：
Diqiu Kexue - Zhongguo Dizhi Daxue Xuebao/Earth Science - Journal of China University of Geosciences | 2019年 / 44卷 / 10期
关键词：
Datangpo Formation; Major element; Ore deposit; Sedimentary environment; Trace element;
D O I：
10.3799/dqkx.2019.075
中图分类号：
学科分类号：
摘要：
In order to analyze sedimentary environment of Zhaodong manganese ore deposits located in the Southwestern Hunan Province from Datangpo Formation in Neoproterozoic Nanhua System (Cryogenian), the petrology and geochemistry of the manganese ore deposits were studied, considering that the Zhaodong manganese ore deposits are mainly hosted in manganous carbonate layer that includes two types of manganese-containing minerals, namely, striped rhodochrosite and massive rhodochrosite at the bottom of the Datangpo Formation. The major elements of Zhaodong manganese ore deposits in Datangpo Formation in Southwestern Hunan Province show positive correlation between the TiO2, SiO2, K2O, Fe2O3, S and Al2O3 and negative correlation between CaO, MgO, MnO, P2O5 and Al2O3, which is consistent with those of typical manganese ore deposits in eastern of Guizhou and western of Hunan Province. It reflects that these manganese ore deposits may have similar mineralization background. Zhaodong manganese ore deposits are characterized by the low Fe/Mn ratios. The ratios of redox sensitive trace elements which can be regarded as marker of sedimentary environment and paleo-oxygenation facies such as Th/U, Ni/Co, V/Cr and V/(V+Ni) indicate that the manganese ore deposits were formed in sub-oxidation to oxidation water condition in Zhaodong manganese ore deposits of the Southwestern Hunan Province. The Zhaodong manganese ore deposits of the Southwestern Hunan Province are characterized geochemically by high ∑REE contents, PAAS-normalized REE patterns similar to that of ferromanganese nodules in modern ocean bottom, and positive Ce anomaly. © 2019, Editorial Department of Earth Science. All right reserved.
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页码：3484 / 3494
页数：10
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