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The Trace Element Distribution Patterns of Ediacaran-Early Cambrian Black Shales and the Origin of Selenium in the Guangning Area, Western Guangdong Province, South China
Tian, Xinglei1,2; Luo, Kunli1; Zuza, Andrew V.3
2017-12-01
Source PublicationACTA GEOLOGICA SINICA-ENGLISH EDITION
ISSN1000-9515
Volume91Issue:6Pages:1978-1991
Corresponding AuthorLuo, Kunli(luokl@igsnrr.ac.cn)
AbstractThe Ediacaran and early Cambrian black shales are widespread across the South China Craton (Yangtze and Cathaysia blocks). However, the trace element distribution patterns of the Ediacaran and early Cambrian black shales in the Cathaysia Block are still unclear. In this study, thirty-four black shale samples in the Lechangxia Group (Ediacaran) and thirteen black shale samples in the lower Bacun Group (early Cambrian) from Guangning area, western Guangdong Province, South China, were analyzed for major and trace elements concentrations. Compared to the upper continental crust, the Ediacaran black shales exhibit strongly enriched Se, Ga, and As with enrichment factor values (EF) higher than 10, significantly enriched Bi and Rb (10>EF>5), weakly enriched Mo, Ba, Cs, V, In, Be, Tl, and Th (5>EF>2), normal U, Cr, Cd, Sc, Pb, Cu, and Li (2>EF>0.5), and depleted Ni, Zn, Sr, and Co. Early Cambrian black shales display strongly enriched Se, Ga, and As, significantly enriched Ba, Bi, and Rb, weakly enriched Mo, Cs, Cd, V, U, Be, In, and Tl, normal Sc, Th, Cr, Li, Cu, Ni, and Pb and depleted Co, Zn, and Sr. Moreover, Se is the most enriched trace element in the Ediacaran and early Cambrian black shales: concentrations vary from 0.25 to 30.09 ppm and 0.54 to 5.01 ppm, and averaging 4.84 and 1.72 ppm, with average EF values of 96.87 and 34.32, for the Ediacaran and early Cambrian shales respectively. The average concentration of Se in the Ediacaran black shales is 2.8 times higher than that of early Cambrian black shales. Se contents in the Ediacaran and early Cambrian black shales exhibit significant variation (P = 0.03). Provenance analysis showed that Se contents of both the Ediacaran and early Cambrian black shales were without detrital provenance and volcanoclastic sources, but of hydrothermal origin. The deep sources of Se and the presence of pyrite may explain the higher Se contents in the Ediacaran black shales. Similar with the Se-rich characteristics of the contemporaneous black shales in the south Qingling Mountain and Yangtze block, the Ediacaran and early Cambrian black shales in Guangning area, Cathaysia, are also enriched in Se, which may provide a clue for looking for the selenium-rich resources in western Guangdong Province.
Keywordblack shale selenium Ediacaran and early Cambrian Guangning area Cathaysia block
DOI10.1111/1755-6724.13445
WOS KeywordRARE-EARTH-ELEMENTS ; IRON-FORMATIONS ; EVOLUTION ; OCEAN ; GEOCHEMISTRY ; OXYGENATION ; CHEMISTRY ; SEDIMENT ; SEAWATER ; FACIES
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[41172310] ; National Natural Science Foundation of China[41472322] ; National Natural Science Foundation of China[40872210] ; National Basic Research Program of China[2014CB238906] ; Local Science and Technology Task Distribution Patterns and Prospect of Exploitation and Utilization of Selenium in Foshan area, Guangdong ; Local Science and Technology Task Construction for Laboratory of Selenium Resources Comprehensive Utilization
Funding OrganizationNational Natural Science Foundation of China ; National Basic Research Program of China ; Local Science and Technology Task Distribution Patterns and Prospect of Exploitation and Utilization of Selenium in Foshan area, Guangdong ; Local Science and Technology Task Construction for Laboratory of Selenium Resources Comprehensive Utilization
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000418844800008
PublisherWILEY
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/60746
Collection中国科学院地理科学与资源研究所
Corresponding AuthorLuo, Kunli
Affiliation1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Univ Nevada, Nevada Bur Mines & Geol, Reno, NV 89557 USA
Recommended Citation
GB/T 7714
Tian, Xinglei,Luo, Kunli,Zuza, Andrew V.. The Trace Element Distribution Patterns of Ediacaran-Early Cambrian Black Shales and the Origin of Selenium in the Guangning Area, Western Guangdong Province, South China[J]. ACTA GEOLOGICA SINICA-ENGLISH EDITION,2017,91(6):1978-1991.
APA Tian, Xinglei,Luo, Kunli,&Zuza, Andrew V..(2017).The Trace Element Distribution Patterns of Ediacaran-Early Cambrian Black Shales and the Origin of Selenium in the Guangning Area, Western Guangdong Province, South China.ACTA GEOLOGICA SINICA-ENGLISH EDITION,91(6),1978-1991.
MLA Tian, Xinglei,et al."The Trace Element Distribution Patterns of Ediacaran-Early Cambrian Black Shales and the Origin of Selenium in the Guangning Area, Western Guangdong Province, South China".ACTA GEOLOGICA SINICA-ENGLISH EDITION 91.6(2017):1978-1991.
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