Application of factor analysis and concentration-volume fractal modeling to delineation of 3D geochemical patterns: a case study of the Jinwozi gold field, NW China

doi:10.1144/geochem2013-229

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

	Application of factor analysis and concentration-volume fractal modeling to delineation of 3D geochemical patterns: a case study of the Jinwozi gold field, NW China
	Lin, Xin 1; Zhang, Bimin 1; Wang, Xueqiu 1
刊名	GEOCHEMISTRY-EXPLORATION ENVIRONMENT ANALYSIS
	2014
卷号	14 期号:4 页码:359-367
关键词	Factor analysis Concentration-volume fractal modeling 3D geochemical patterns Jinwozi gold field
ISSN号	1467-7873
DOI	10.1144/geochem2013-229
英文摘要	Delineation of vertical distribution patterns of elements in overburden over a concealed deposit is essential for determining potential upward migration mechanism of elements and for predicting undiscovered mineral deposits. The aim of this study is to identify the vertical distribution features of elements in the regolith over the Jinwozi gold field, NW China by using factor analysis (FA) and concentration-volume (C-V) fractal modeling based on the data-set generated from 70 overburden drilling boreholes. Firstly, the zones of different gold enrichment states were obtained by the C-V fractal method. Secondly, FA was utilized to define the mineralization-related element association. Finally, the C-V method was applied to the relevant association defined by FA. The results showed that: (1) the C-V fractal method distinguished four enrichment states determined by Au thresholds of 1.6, 7.9 and 39.9 ng/g and by factor scores of -1.14, 0.33 and 1.45; (2) the first factor that describes 41.5% of the common variance has positive loadings in Au, As, Sb and Mo; (3) the zones of both high Au contents and factor scores generally showed horizontally northeasterly distribution along the ductile-shearing alteration belt and vertically top-bottom symmetric distribution in the regolith over the deposit; (4) the rest of the zones determined by the C-V fractal model properly delineated the zones of low and high backgrounds and moderate Au enrichment; and (5) the moderately-enriched zones of the raw Au data are better than those of the factor scores, and the rest of the zones have the similar distributions. These results indicate that: (1) the distribution of elements in the regolith was the product of nonlinear natural processes resulting in an enrichment pattern at the surface over the deposit; and (2) the integration of FA and C-V fractal model is effective for the delineation of 3D geochemical patterns.
学科主题	地球化学勘查
WOS关键词	UNDISCOVERED MINERAL-DEPOSITS ; PORPHYRY DEPOSIT ; YUNNAN-PROVINCE ; COVERED AREAS ; CENTRAL IRAN ; ANOMALIES ; CU ; SEPARATION ; ZONES ; TERRAIN
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	GEOLOGICAL SOC PUBL HOUSE
WOS记录号	WOS:000348637400005
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/41057]
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.Inst Geophys & Geochem Explorat, Langfang 065000, Peoples R China 2.Minist Land & Resources, Key Lab Geochem Explorat, Langfang 065000, Peoples R China
推荐引用方式 GB/T 7714	Lin, Xin,Zhang, Bimin,Wang, Xueqiu. Application of factor analysis and concentration-volume fractal modeling to delineation of 3D geochemical patterns: a case study of the Jinwozi gold field, NW China[J]. GEOCHEMISTRY-EXPLORATION ENVIRONMENT ANALYSIS,2014,14(4):359-367.
APA	Lin, Xin,Zhang, Bimin,&Wang, Xueqiu.(2014).Application of factor analysis and concentration-volume fractal modeling to delineation of 3D geochemical patterns: a case study of the Jinwozi gold field, NW China.GEOCHEMISTRY-EXPLORATION ENVIRONMENT ANALYSIS,14(4),359-367.
MLA	Lin, Xin,et al."Application of factor analysis and concentration-volume fractal modeling to delineation of 3D geochemical patterns: a case study of the Jinwozi gold field, NW China".GEOCHEMISTRY-EXPLORATION ENVIRONMENT ANALYSIS 14.4(2014):359-367.