Geochemistry and origin of tin-polymetallic sulfide deposits hosted by the Devonian black shale series near Dachang, Guangxi, China

doi:10.1016/j.oregeorev.2003.08.006

	Geochemistry and origin of tin-polymetallic sulfide deposits hosted by the Devonian black shale series near Dachang, Guangxi, China
	Fan, DL ; Zhang, T ; Ye, J ; Pasava, J ; Kribek, B ; Dobes, P ; Varrin, I ; Zak, K
刊名	ORE GEOLOGY REVIEWS
	2004
卷号	24 期号:1-2 页码:103-120
关键词	giant tin-polymetallic sulfide deposits Dachang Devonian black shale series geochemistry origin
ISSN号	0169-1368
DOI	10.1016/j.oregeorev.2003.08.006
文献子类	Article
英文摘要	Two tin-polymetallic sulfide deposits hosted by the Devonian black shale series of the Guangxi Zhuang Autonomous region occur in the Dachang ore field. The Upper Devonian (Frasnian Epoch) black shale series contains the giant Tongkeng-Changpo deposit, and the Middle Devonian (Givetian Epoch) reef limestone contains the giant Longtoushan deposit. Intrusive rocks occur at Lame and the western part of Dachang. Ores occur as stratified bodies, large veins, stockworks and zones of veinlets. Ores are massive, banded, laminated and disseminated. The ores contain more than 180 different minerals, the most important of which are cassiterite, sulfides and sulfosalts. Primary laminated sedimentary sulfide ores occur at Tongkeng. The mean ratio Of SiO2/Al2O3 for shale-marl is 3.5, but values averaging 56 and 67, respectively, for ore and chert suggest a biogenic or hydrothermal source for silica. Ores and country rocks are rich in Sb, Pb, Zn, Sn and Cu; granites are rich in Sb, W, Zn and Sn. Dispersed elements, such as Te, Cd, Se and In, are abundant in ores, country rocks and granites, implying contributions of sedimentary and intrusive activities to the ore formation. Mean Y/Ho values for the black shale series (28) and granite (31) are similar to most shales and most volcanic rocks; the Y/Ho value for reef limestone is 47, comparable to sea water. Devonian black shale series are slightly LREE-enriched on chondrite-normalized plots and show small negative Eu anomalies; mean deltaEu (0.56),deltaCe (0.9) and Ce-anom (-0.07) values suggest a shallow-water deposition near the redox boundary. The delta(34)S values of sulfides from various deposits of Dachang vary with thedelta(34)S values for Lame ranging from -2parts per thousand to +2parts per thousand, and values for Tongkeng-Changpo ranging from -4.9parts per thousand to +2.6parts per thousand. The highly negativedelta(34)S values ( -9.5parts per thousand to -11.3parts per thousand) of Huile and Kengma sulfides suggest the important role of biogenic sulfur. The meandelta(13)C value of organic matter of Devonian black shale series is -24.6parts per thousand. Thedelta(30)Si(NBS-28) values of Upper Devonian black chert are 0.2-0.3 parts per thousand, indicating a sedimentary origin. The Dachang black chert has been dated at 124 +/- 2 Ma; that of Luofu section at 387 +/- 18 Ma, implying that the Rb/Sr isotope of Dachang chert was reset during Yanshan Movement. These results suggest that the Dachang tin-polymetallic sulfide deposits exemplify strongly remobilized sedimentary mineralization. (C) 2003 Elsevier B.V. All rights reserved.
WOS关键词	SEDIMENTARY SHELL ; CRUST ; EARTH
WOS研究方向	Geology ; Mineralogy ; Mining & Mineral Processing
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000187910200006
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/64280]
专题	中国科学院地质与地球物理研究所
通讯作者	Fan, DL
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Bur Sci & Technol Policy, Beijing 100864, Peoples R China 3.Czech Geol Survey, Prague 11821 1, Czech Republic
推荐引用方式 GB/T 7714	Fan, DL,Zhang, T,Ye, J,et al. Geochemistry and origin of tin-polymetallic sulfide deposits hosted by the Devonian black shale series near Dachang, Guangxi, China[J]. ORE GEOLOGY REVIEWS,2004,24(1-2):103-120.
APA	Fan, DL.,Zhang, T.,Ye, J.,Pasava, J.,Kribek, B.,...&Zak, K.(2004).Geochemistry and origin of tin-polymetallic sulfide deposits hosted by the Devonian black shale series near Dachang, Guangxi, China.ORE GEOLOGY REVIEWS,24(1-2),103-120.
MLA	Fan, DL,et al."Geochemistry and origin of tin-polymetallic sulfide deposits hosted by the Devonian black shale series near Dachang, Guangxi, China".ORE GEOLOGY REVIEWS 24.1-2(2004):103-120.