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Title

Mineralization horizons, stracture and texture, alteration and mineralization stages in the Zn-Pb (Ba) Eastern Haft-Savaran deposit in Malayer-Esfahan metallogenic belt, south of Khomain

Pages

  3-12

Abstract

 The Early Cretaceous Eastern Haft-Savaran Zn-Pb (Ba) deposit situated in the Arak mining district and occurred within the extentional back-arc of Malayer-Esfahan basin. Mineralization occurred in two horizons in the Estern Haft-Savaran deposit. First horizon is major horizon that formed within the most upper portion of the massive limestone and second horizon occurred in the thin limestone which is alternate with shale and marl. Textures of the mineralization in this deposit are replacement, massive and vein-veinlets, and main alterations are silisification, dolomitization and calcitization. Sphalerite, galena, chalcopyrite, tetrahedryte, pyrite, bornite, chalcosite and covelite are the sulfide minerals and quartz, calcite, dolomite and sericite are gangue minerals in the ore deposit. Cathodoluminescence study in this deposit indicates three dolomites and one calcite generations. First generation of dolomite associated with weak mineralization and second generation of dolomite is Fe-rich and associated with main mineralization. Third generation of dolomite is late dolomitization and formed with calcite and cross-cutted the mineralization. Presence of framboidal pyrite with galena and sphalerite in its matrix and fine-grain euhedral barite suggest mineralization began during sedimentation and early diagenesis stage near seafloor. In continuum, main ore is identified as replacement occurrence of first generation sulfides by second generation coarse-grained sulfides under seafloor. With regarding to the formation of the Eastern Haft-Savaran deposit in the extentional tectonic setting, massive limestone as the host rock, and mineralization formation as replacment during diagenesis of the host rock under the seafloor, this deposit would be classified as Irish type deposit.

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    APA: Copy

    MAHMOODI, P., RASTAD, E., RAJABI, A., & MORADPOUR, M.. (2019). Mineralization horizons, stracture and texture, alteration and mineralization stages in the Zn-Pb (Ba) Eastern Haft-Savaran deposit in Malayer-Esfahan metallogenic belt, south of Khomain. GEOSCIENCES, 28(110 ), 3-12. SID. https://sid.ir/paper/32127/en

    Vancouver: Copy

    MAHMOODI P., RASTAD E., RAJABI A., MORADPOUR M.. Mineralization horizons, stracture and texture, alteration and mineralization stages in the Zn-Pb (Ba) Eastern Haft-Savaran deposit in Malayer-Esfahan metallogenic belt, south of Khomain. GEOSCIENCES[Internet]. 2019;28(110 ):3-12. Available from: https://sid.ir/paper/32127/en

    IEEE: Copy

    P. MAHMOODI, E. RASTAD, A. RAJABI, and M. MORADPOUR, “Mineralization horizons, stracture and texture, alteration and mineralization stages in the Zn-Pb (Ba) Eastern Haft-Savaran deposit in Malayer-Esfahan metallogenic belt, south of Khomain,” GEOSCIENCES, vol. 28, no. 110 , pp. 3–12, 2019, [Online]. Available: https://sid.ir/paper/32127/en

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