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Petrology of the Plutonic Rocks at the XIV Iron-Oxide Prospect, bafq Mining District, Central Iran

Open Journal of Geology 2016年第12期6卷 1591-1604页

作者： Samira Bakhtiyari Mohammad Lotfi Nima Nezafati Arash Gourabjeripour Department of Geology Science and Research Branch Islamic Azad University Tehran Iran Department of Geology North Tehran Branch Islamic Azad University Tehran Iran Department of Geology Myianeh Branch Islamic Azad University Myianeh Iran

The XIV iron-oxide prospect in the northern part of the bafq mining district is hosted by intrusive rocks and demonstrates similar characteristics with Kiruna mineralization. The plutonic complex of the XIV prospect is composed of two major types of intrusive rocks, including: 1) a granitic intrusive body which is itself composed of two types;a pale-pink leucogranite and a white-gray aplite, as well as 2) a gabbrodiorite intrusive body. Geochemically, these rocks are tholeitic-calcalkaline and metaluminous in nature. Geochemical characteristics of the plutonic rocks of the study area support a non-orogenic continental setting.

关键词： Granite Gabbrodiorite Geochemistry Petrography bafq Iron

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The Relationship between Fe Mineralization and Magnetic Basement Faults using Multifractal Modeling in the Esfordi and Behabad Areas(BMD), Central Iran

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Acta Geologica Sinica(English Edition) 2022年第2期96卷 591-606页

作者： Masoumeh NABILOU Peyman AFZAL Mehran ARIAN Ahmad ADIB Hassan KHEYROLLAHI Mohammad FOUDAZI Parviz ANSARIRAD Department of Earth Sciences Science and Research BranchIslamic Azad UniversityTehranIran Department of Petroleum and Mining Engineering South Tehran BranchIslamic Azad UniversityTehranIran Division of Airborne Geophysics Explorartion DepartmentGeological Survey of IranTehranIran Department of Geology Eslamshar BranchIslamic Azad UniversityTehranIran Farhangian University TehranIran

Multifractal modeling is a mathematical method for the separation of a high potential mineralized background from a non-mineralized background. The Concentration-Distance to Fault structures(C-DF) fractal model and the distribution of the known iron(Fe) deposits/mines seen in the Esfordi and Behabad 1:100,000 sheets from the bafq region of central Iran are used to distinguish Fe mineralization based on their distance to magnetic basement structures and surface faults, separately, using airborne geophysical data and field surveys. Application of the C-DF fractal model for the classification of Fe mineralizations in the Esfordi and Behabad areas reveals that the main ones show a correlation with their distance from magnetic basement structures. Accordingly, the distances of Fe mineralizations with grades of Fe higher than 55%(43% < Fe ≤ 60%) are located at a distance of less than 1 km, whereas for surfacial faults with grades of 43% ≤ Fe ≤ 60%, the distances are 3162< DF ≤ 4365 m from the faults. Thus, there is a positive relationship between Fe mineralization and magnetic basement structures. Also, the proximity evidence of Precambrian high-grade Fe mineralization related to magnetic basement structures indicates syn-rifting tectonic events. Finally, this C-DF fractal model can be used for exploration of magmatic and hydrothermal ore deposits.

关键词： Fe mineralization prospecting Concentration-Distance to Fault model(C-DF) fractals bafq Iran

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