中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Characteristics of the Devonian Xialei manganese deposit, Guangxi Zhuang Autonomous Region, China

文献类型:期刊论文

作者Zeng, YY; Liu, TB
刊名ORE GEOLOGY REVIEWS
出版日期1999-10-01
卷号15期号:1-3页码:153-163
关键词Mn carbonate Mn silicates Devonian bacterial and hydrothermal processes China
ISSN号0169-1368
文献子类Review
英文摘要The Xialei Mn deposit occurs in the Late Devonian (Famenian) Wuzhishan Formation and consists of three ore horizons composed of three ore types: (1) Mn carbonate, (2) Mn silicate-Mn carbonate, and (3) Mn-oxide. Mn silicate-Mn carbonate ore beds consist of Mn carbonates and associated rhodonite, stilpnomelane, actinolite, chlorite, Mn epidote, biotite, and Mn-Fe antigorite. These minerals are mixed with each other and form thin beds, bands, pelletal and pisolitic grains, and horizontal or wavy laminae. Abundant oolitic and pisolitic grains in Mn ore beds show distinct boundaries and nuclei of Mn carbonate and Mn silicate minerals, rarely elastic,grains. The ore deposit is divided into three zones: (1) an inner zone composed of Mn carbonate, silicate, and oxide minerals; (2) a transitional zone consisting of Mn carbonate and stilpnomelane; and (3) an outer zone characterized by Mn carbonate. Argillaceous limestone at the base of the ore beds has a mean delta(13)C(PDB) Of about 0.0 parts per thousand, indicating that the carbon was derived from seawater bicarbonate. The delta(13)C(PDB) of Mn carbonate ranges from -2.8 to -14.3 parts per thousand (mean -7.1 parts per thousand), indicating that the carbon was derived from both degradation of organic matter and seawater bicarbonate. Ores formed in a trough on a carbonate platform. Primary sedimentary Mn carbonates precipitated from alkaline and negative Eh waters in the diagenetic zone of sulfate reduction, which occurred either during shallow burial or at the seafloor. Oolites and pisolites formed by sedimentary processes on the seafloor. In places, deposits were reworded and transported by gravity-flow processes. The region where these sedimentary-diagenetic Mn deposits formed was intruded by magma, and hydrothermal fluids with dissolved metals leached from volcanic and sedimentary rocks ascended along fractures. The Mn silicate-Mn carbonate ore may have been produced by contact metamorphism of primary carbonate ore and metal sulfides deposited by hydrothermal fluids, which overprinted the primary sedimentary ore. (C) 1999 Elsevier Science B.V. All rights reserved.
WOS关键词ISOTOPIC EVIDENCE
WOS研究方向Geology ; Mineralogy ; Mining & Mineral Processing
语种英语
WOS记录号WOS:000083933600010
出版者ELSEVIER SCIENCE BV
源URL[http://ir.iggcas.ac.cn/handle/132A11/75690]  
专题中国科学院地质与地球物理研究所
通讯作者Liu, TB
作者单位1.Chinese Acad Sci, Inst Geol, Beijing 100029, Peoples R China
2.Mineral Resources Adm Guangxi Zhuang Autonomous R, Nanning 530023, Guangxi, Peoples R China
推荐引用方式
GB/T 7714
Zeng, YY,Liu, TB. Characteristics of the Devonian Xialei manganese deposit, Guangxi Zhuang Autonomous Region, China[J]. ORE GEOLOGY REVIEWS,1999,15(1-3):153-163.
APA Zeng, YY,&Liu, TB.(1999).Characteristics of the Devonian Xialei manganese deposit, Guangxi Zhuang Autonomous Region, China.ORE GEOLOGY REVIEWS,15(1-3),153-163.
MLA Zeng, YY,et al."Characteristics of the Devonian Xialei manganese deposit, Guangxi Zhuang Autonomous Region, China".ORE GEOLOGY REVIEWS 15.1-3(1999):153-163.

入库方式: OAI收割

来源:地质与地球物理研究所

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