Geochemical studies of stream sediment to determine the shear zone-related gold mineralization (Case study of Alut area in Kurdistan province)
Subject Areas :Fardin Ahmadi 1 , Mahyadin Mohamadpour 2
1 - Mining exploration, Faculty of Mining, Petroleum & Geophysics Engineering, Shahrood University of Technology,Shahrood, Iran
2 - دانشجوی دکتری اکتشاف مواد معدنی، گروه مهندسی معدن، دانشگاه تهران
Keywords: PCA, discriminant analysis, gold, stream sediment, Alut,
Abstract :
Geochemical studies of stream sediments are one of the most common methods in mineral exploration, specifically used for gold prospecting. In this study, the univariate statistical parameters, such as the comparison of the maximum and minimum of each element with the background were used in order to identify the Influential elements. Then histogram and probability diagram were prepared. Subsequently influential components and Elements that are closely linked together, were identified using multivariate statistical methods such as Principal Component Analysis. These analyses indicate that six elements (including Au, Hg, Be, Mo, Ti, and Sn) are more important than others. The components of 3 and 7 as influential components were identified and these components were mapped. In the next step, the model of influential elements was creating on a logarithmic scale. The result of the modeling indicates that 80% of classification is correct. Subsequently, the gold-element data were divided into three sub-communities including background (code 0), the Community of background to the anomaly (code 1), and the anomaly-community (code 2). Finally, the gold distribution pattern based on these sub-communities was prepared that three parts of the region were presented as potential areas. For 8 elements the map of discriminant analysis shows that Au and As have opposite treatment.
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