Prospecting of Au by Remote Sensing and Geochemical Data Processing Using Fractal Modelling in Shishe-Botagh, Area (NW I
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RESEARCH ARTICLE
Prospecting of Au by Remote Sensing and Geochemical Data Processing Using Fractal Modelling in Shishe-Botagh, Area (NW Iran) Faranak Feizi 1 & Edris Mansouri 2 & Amirabbas Karbalaei Ramezanali 2
Received: 2 October 2014 / Accepted: 30 September 2015 # Indian Society of Remote Sensing 2016
Abstract The Shishe-botagh area is located in the western Azerbaijan Province, Iran. In this paper, geological map, ASTER satellite images were used and processed by ENVI software. Furthermore, lithogeochemical data were analyzed by fractal modeling. In this paper alternation zones distinguished by using band ratio, Minimum Noise Fraction (MNF) and Spectral Angle Mapper (SAM). Geochemical anomalies were separated by number – size (N-S) fractal model. The (N-S) fractal method was utilized for delineation of high intensive Au, As and Ag anomalies with silica veins in the west and South West of the the Shishe-botagh area. Keywords Alteration zones . Aster . Geochemical data . Shishe-botagh . Number-size fractal model
Introduction In this paper used to apply spectral angle mapper (SAM), Minimum Noise Fraction (MNF) and band ratio to map the iron zones on the ASTER (Advanced Spaceborne Thermal Emission and Reflection Radiometer) data. Separation of anomalies and background is the most important aim of geochemical exploration especially for metallic deposits. Stream sediment and
* Faranak Feizi [email protected] 1
Mine Engineering Department, South Tehran Branch, Islamic Azad University, Tehran, Iran
2
Young Researchers and Elite Club, South Tehran Branch, Islamic Azad University, Tehran, Iran
lithogeochemical data are essential for prospecting of different ore deposits (Hawkes and Webb 1979). Several methods are used for geochemical data interpretation and modelling such as classical statistics (e.g.,Tukey 1977; Hawkes and Webb 1979; Reimann et al. 2005), fractal/multifractal modelling (Cheng et al. 1994; Agterberg et al. 1996; Cheng 1999; Li et al. 2003; Zuo et al. 2009; Afzal et al. 2013; Heidari et al. 2013) and singularity modeling (Cheng 2007). Fractal theory has been established by Mandelbrot (1983) as a important nonEuclidean branch in geometry. Several methods have been proposed and developed based on fractal geometry for application in geosciences since the 1980s (Agterberg et al. 1993; Sanderson et al. 1994; Cheng 1999; Turcotte 1997, 2002; Goncalves et al. 2001; Monecke et al. 2005; Gumiel et al. 2010; Zuo 2011; Sadeghi et al. 2012). The present study is based on the integration of remote sensing techniques and geochemical data analysis (stream sediment and litho geochemical samples) and as well as geological field verification studies to identify Au, Ag and As prospects in the Shishe-botagh, NW Iran.
Regional and Geological Setting of the Study Area Shishe-botagh area is located between longitudes 709,040– 710,450 and latitudes 4,041,811–4,039,924 (UTM, WGS 84, zone 38 N) in the western Azerbaijan Proveince, NW Iran (Fig.1). The studied area is a small north part of 1:100, 000 Takab geologic
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