distributionandenrichmentpatternsofseleniumintheediacaranandearlycambrianstrataintheyangtzegorgesareasouthchina

	distributionandenrichmentpatternsofseleniumintheediacaranandearlycambrianstrataintheyangtzegorgesareasouthchina
	Tian Xinglei; Luo Kunli
刊名	sciencechinaearthsciences
	2017
卷号	60 期号:7 页码:1268
ISSN号	1674-7313
英文摘要	The distribution and enrichment patterns of selenium (Se) in the E-?_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-?_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-?_1 strata vary from Yanjiahe (54.45)>Doushantuo (24.72)>Dengying (2.48)>Shipai (1.95)>lower Tianheban (1.24) Formations. Se concentrations in the E-Ci 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.
语种	英语
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/106724]
专题	中国科学院地理科学与资源研究所
作者单位	中国科学院地理科学与资源研究所
推荐引用方式 GB/T 7714	Tian Xinglei,Luo Kunli. distributionandenrichmentpatternsofseleniumintheediacaranandearlycambrianstrataintheyangtzegorgesareasouthchina[J]. sciencechinaearthsciences,2017,60(7):1268.
APA	Tian Xinglei,&Luo Kunli.(2017).distributionandenrichmentpatternsofseleniumintheediacaranandearlycambrianstrataintheyangtzegorgesareasouthchina.sciencechinaearthsciences,60(7),1268.
MLA	Tian Xinglei,et al."distributionandenrichmentpatternsofseleniumintheediacaranandearlycambrianstrataintheyangtzegorgesareasouthchina".sciencechinaearthsciences 60.7(2017):1268.