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Distribution and enrichment patterns of selenium in the Ediacaran and early Cambrian strata in the Yangtze Gorges area, South China
Tian, XingLei1,2; Luo, KunLi1
2017-07-01
Source PublicationSCIENCE CHINA-EARTH SCIENCES
ISSN1674-7313
Volume60Issue:7Pages:1268-1282
Corresponding AuthorLuo, KunLi(luokl@igsnrr.ac.cn)
AbstractThe distribution and enrichment patterns of selenium (Se) in the E-D"1 strata in the Yangtze Gorges area of South China were obtained. The geochemical characteristics of the significantly and non-significantly enriched strata of Se were analyzed.The observed enrichment factor (EF, relative to the upper continental crust) and concentration coefficient (CC, relative to the similar lithology in Eastern China) both suggest that Se is the most enriched/concentrated (Se-EF=26.97, Se-CC=48.04) among the analyzed 23 trace elements the E-D"(1) strata. The normalized enrichment factor (EF', EF after Al or Th normalized) shows Se is secondly enriched (Se-EF'=218.73), which is slightly lower than cadmium (Cd-EF'=288.46) but significantly higher than the third enriched trace element arsenic (As-EF'=97.49). Se concentrations in the E-D"(1) strata vary from < 10(aEuro'5) to 30.08 ppm with an arithmetic mean value of 1.35 ppm. Compared to the Nantuo Formation, Se increased 11.78 times in the whole E-D"(1) strata and the average EF values are displayed as Shuijingtuo (92.58)> Yanjiahe (54.45)> Doushantuo (24.72)> Dengying (2.48)> Shipai (1.95)> lower Tianheban (1.24) Formations. Se concentrations in the E-D"(1) strata are best displayed on natural logarithm normal quantile-quantile (Q-Q) plots and shown as a positive-skewed distribution pattern. The Se significantly enriched (EF > 10) strata sequences mainly include the lower and upper Doushantuo member II (DST-II), top DST-III, DST-IV, the basal and upper Yanjiahe Formation, and lower and upper Shuijingtuo Formation. Geochemical characteristics indicate that Se concentrations in the significantly enriched strata were generally influenced by terrigenous detrital as well as the combined action of single or multiple factors, such as hydrotherm, volcanic debris and deep source. Moreover, pyrite and organic matter promoted the enrichment of Se in the upper DST-II, DST-IV, upper Shuijingtuo Formation and lower DST-II, upper Shuijingtuo Formation, respectively. The Se concentrations in the not significantly enriched strata (except for DST-I, middle Shuijingtuo Formation, Shipai Formation and lower Tianheban Formation) were also influenced by terrigenous detrital, but other enrichment activities (e.g., hydrothermal, volcanic debris, and deep source) were generally insignificant.
KeywordEdiacaran-early Cambrian Selenium Distribution and enrichment patterns Elemental geochemistry
DOI10.1007/s11430-016-9045-1
WOS KeywordRARE-EARTH-ELEMENTS ; DOUSHANTUO FORMATION ; BLACK SHALE ; DEPOSITIONAL-ENVIRONMENTS ; TRACE ; OCEAN ; GEOCHEMISTRY ; CHEMOSTRATIGRAPHY ; CONSTRAINTS ; INDICATORS
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[41172310] ; National Natural Science Foundation of China[41472322] ; National Basic Research Program of China[2014CB238906]
Funding OrganizationNational Natural Science Foundation of China ; National Basic Research Program of China
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000406020600005
PublisherSCIENCE PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/62725
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, Coll Resources & Environm, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Tian, XingLei,Luo, KunLi. Distribution and enrichment patterns of selenium in the Ediacaran and early Cambrian strata in the Yangtze Gorges area, South China[J]. SCIENCE CHINA-EARTH SCIENCES,2017,60(7):1268-1282.
APA Tian, XingLei,&Luo, KunLi.(2017).Distribution and enrichment patterns of selenium in the Ediacaran and early Cambrian strata in the Yangtze Gorges area, South China.SCIENCE CHINA-EARTH SCIENCES,60(7),1268-1282.
MLA Tian, XingLei,et al."Distribution and enrichment patterns of selenium in the Ediacaran and early Cambrian strata in the Yangtze Gorges area, South China".SCIENCE CHINA-EARTH SCIENCES 60.7(2017):1268-1282.
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