Prospecting of gold mineralization in Saqez area (NW Iran) using geochemical, geophysical and geological studies based on multifractal modelling and principal component analysis

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• 作者：Alireza Almasi ; Alireza Jafarirad ; Peyman Afzal…
• 关键词：Gold prospecting ; Elemental correlation ; Concentration area ; Multifractal modelling ; Aeromagnetic data ; Multiscale edge detection
• 刊名：Arabian Journal of Geosciences
• 出版年：2015
• 出版时间：August 2015
• 年：2015
• 卷：8
• 期：8
• 页码：5935-5947
• 全文大小：19,434 KB
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• 作者单位：Alireza Almasi (1)
  Alireza Jafarirad (1)
  Peyman Afzal (2) (3)
  Mana Rahimi (4)
  
  1. Department of Geology, Islamic Azad University, Science and Research branch, P.O. Box 1477893855, Tehran, Iran
  2. Department of Mining Engineering, Faculty of Engineering, Islamic Azad University, South Tehran branch, Tehran, Iran
  3. Camborne School of Mines, University of Exeter, Penryn, UK
  4. Geoinformatics Group, Department of Geomatics, Geological Survey of Iran (GSI), Tehran, Iran
  
• 刊物类别：Earth and Environmental Science
• 出版者：Springer Berlin Heidelberg
• ISSN：1866-7538

文摘

The aim of this study is to find gold prospecting areas based on geological, geochemical and geophysical data in Saqez area, NW of Iran. In order to achieve this task data, the analysis of 448 stream sediment samples are used to determine elemental correlations using bivariate and multivariate correlation methods, such as Spearman and principal component analysis (PCA). Afterwards, concentration–number multifractal model is used to delineate anomaly thresholds from the background for Au, As, Bi, Hg and first factor of the PCA. Moreover, for studying structures such as faults, fractures, and lithological contacts and their relationship with Au anomalies, the edges of magnetic anomalies are detected from aeromagnetic data based on an enhanced multilevel edge detection method. Subsequently, the geochemical anomalies and the extracted lineaments are correlated with geological particulars which are located in the catchment basins of anomalous areas to specify favourable host rocks and to study possible types of gold mineralization. Keywords Gold prospecting Elemental correlation Concentration area Multifractal modelling Aeromagnetic data Multiscale edge detection