Skip to Main Content
GEOREF RECORD

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, Zhang Bimin and 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
Geochemistry - Exploration, Environment, Analysis (June 2014) 14 (4): 359-367

Abstract

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.


ISSN: 1467-7873
EISSN: 2041-4943
Serial Title: Geochemistry - Exploration, Environment, Analysis
Serial Volume: 14
Serial Issue: 4
Title: 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
Affiliation: Institute of Geophysical and Geochemical Exploration, Langfang, China
Pages: 359-367
Published: 20140618
Text Language: English
Publisher: Geological Society Publishing House, London, United Kingdom
References: 46
Accession Number: 2014-053705
Categories: Economic geology, geology of ore depositsGeochemistry of rocks, soils, and sediments
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 2 tables, sect.
N42°47'60" - N42°47'60", E93°27'00" - E93°27'00"
Country of Publication: United Kingdom
Secondary Affiliation: GeoRef, Copyright 2019, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States. Reference includes data from The Geological Society, London, London, United Kingdom
Update Code: 201429
Close Modal
This Feature Is Available To Subscribers Only

Sign In or Create an Account

Close Modal
Close Modal