Application of fractal geometry for recognizing the pattern of textural zoning in epithermal deposits (case study: Sheikh-Darabad Cu-Au indices, East-Azarbaijan province)

زمین شناسی اقتصادی

Article 2, Volume 5, Issue 1 - Serial Number 8, July 2013, Pages 23-36   

Document Type: Research Article

DOI: 10.22067/econg.v5i1.22885

Author

Seyed Reza Mehrnia^*

Payame Noor

Abstract

Isotopic and microthermometry results from Sheikh-Darabad Cu-Au indices in Mianeh region, East-Azarbaijan province, indicate Cenozoic post-magmatic activities with developed adularia facies through an extended and Neogene related alteration that is given rise to occurring silica vein systems as the main hosting locations for epithermal mineralization. The research evidence also has been coincided with Queensland textural zoning conclusions which confirm a success case of silica textural variations associated with Sheikh-Darabad gold and copper bearing locations based on paragenesis of quartz-pyrite-chalcopyrite. As a new result, fractal-based geometry has been used for assessing the nonlinear distribution of siliceous components and subsequently for prognosis of gold mineralization potential in Sheikh-Darabad region. In practice, most of quartzitic occurrences and related textural variations have been precisely studied and realized by satisfying to silica power law statement in order to obtain the self-similar peculiarities of individual textures. Therefore, using a textural pattern for evaluating and correlating between silica zonal variations and its ordinary textural evolutions in post-magmatic environments, is a new criterion for prospecting precious metals with finally emphasizing on gold exploration priorities in Sheikh-Darabad region.

Keywords

Fractal; Gold exploration; Hydrothermal solution; Silica distribution; Textural zoning

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