Multivariate analysis of regolith sediment geochemical data from the Jinwozi gold field, north-western China

doi:10.1016/j.gexplo.2013.11.006

CORC > 中国地质调查局 > 中国地质调查局 > 中国地质科学院地球物理地球化学勘查研究所

	Multivariate analysis of regolith sediment geochemical data from the Jinwozi gold field, north-western China
	Lin, Xin 2; Wang, Xueqiu ; Zhang, Bimin ; Yao, Wensheng
刊名	JOURNAL OF GEOCHEMICAL EXPLORATION
	2014
卷号	137 页码:48-54
关键词	Multivariate analysis Desert regolith sediment Deep-penetrating geochemistry Jinwozi gold field
ISSN号	0375-6742
DOI	10.1016/j.gexplo.2013.11.006
英文摘要	The study of deep-penetrating geochemistry of arid desert terrains in the Jinwozi gold field, north-western China has generated a data set of multi-element geochemistry, characterised by high complexity and variability leading to difficulties in integration and interpretation. Three multivariate statistical methods, i.e., factor analysis (FA), hierarchical cluster analysis (HCA) and discriminant analysis (DA) were applied to a subgroup of the data set in order to define the element associations, to identify the anomalies and to classify the regolith samples. The geochemical patterns of arid desert terrains were thus interpreted with the aid of statistical techniques. The subgroup consists of Au, Ag, As, Hg, Cu, Mo, Sb and Zn concentrations of regolith samples collected from two traverse lines and five overburden boreholes. Two factors with eigenvalues greater. than 1 extracted by FA account for approximately 81% of the total variance. Specifically, factor I explains 52% of the total variance and is highly loaded by a combination of Au-As-Hg-Ag. This combination could represent the major mineralisation and three anomalous sites have been determined. Two of which are located over the known deposit. Factor 2 explains 29% of the total variance and has positive loadings on Cu and Zn denoting the minor mineralisation and diagenesis. High positive scores of both factors could be considered as an indication of the mineralisation. Silver, As, Cu and Zn are the most effective indirect indicator elements in the Jinwozi. The HCA was then applied to the classification of samples taken from the five boreholes at the three anomalous sites. Three geochemically distinct clusters, named A1, A2 and A3, resulted from the HCA. Samples from duster A1 with high concentrations of Au, Ag, As, Hg, Cu and Zn are highly-mineralised. In addition, samples from cluster A2 and A3 can be generally treated as non-mineralised. The DA confirmed the results obtained from the HCA. The spatial distribution of the clusters shows vertical symmetric distribution of highly-mineralised samples over the deposit. This confirms the effectiveness of the FA in delineation of the anomalies in the Jinwozi. The integration of the FA, HCA and DA proved to be an effective tool in the field of deep-penetrating geochemistry. (C) 2013 Elsevier B.V. All rights reserved.
学科主题	地球化学勘查
WOS关键词	DISCRIMINANT-ANALYSIS ; NORTHWESTERN CHINA ; CLUSTER-ANALYSIS ; GROUNDWATER ; DEPOSITS
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000331415200005
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/41059]
专题	中国地质科学院地球物理地球化学勘查研究所
作者单位	1.CAGS, IGGE, Langfang 065000, Peoples R China; Minist Land & Resources, Key Lab Geochem Explorat, Langfang 065000, Peoples R China 2.中国地质科学院地球物理地球化学勘查研究所
推荐引用方式 GB/T 7714	Lin, Xin,Wang, Xueqiu,Zhang, Bimin,et al. Multivariate analysis of regolith sediment geochemical data from the Jinwozi gold field, north-western China[J]. JOURNAL OF GEOCHEMICAL EXPLORATION,2014,137:48-54.
APA	Lin, Xin,Wang, Xueqiu,Zhang, Bimin,&Yao, Wensheng.(2014).Multivariate analysis of regolith sediment geochemical data from the Jinwozi gold field, north-western China.JOURNAL OF GEOCHEMICAL EXPLORATION,137,48-54.
MLA	Lin, Xin,et al."Multivariate analysis of regolith sediment geochemical data from the Jinwozi gold field, north-western China".JOURNAL OF GEOCHEMICAL EXPLORATION 137(2014):48-54.