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      • Open Access Article

        1 - Origin and development of Skarn-Forming fluids from the Band-e-Narges Skarn Iron ore, Central Iran
        Maliheh Nazari Mohammad Lotfi Nematallah Rashidnejad omran Nima Nezafati
      • Open Access Article

        2 - Genetic Issues of Some of the Non Metallic Minerals in Lesser Himalaya
        R. Sharma P. Joshi P. Verma
        A brief account of the representative and workable industrial minerals namely magnesite, talc and barite in Lesser Himalaya, is presented here emphasizing their genesis. Deposits of magnesite and talc are found associated with Neoproterozoic, plateform type, shelf-slope More
        A brief account of the representative and workable industrial minerals namely magnesite, talc and barite in Lesser Himalaya, is presented here emphasizing their genesis. Deposits of magnesite and talc are found associated with Neoproterozoic, plateform type, shelf-slope limestone-dolomite host rocks from inner Lesser Himalayan sequences. Field, textural, geochemical signatures and fluid inclusions trapped in dolomite and magnesite reveal within basin processes, in an increased burial- diagenetic environment responsible for formation of magnesite replacing dolomite. Talc is formed at the expense of magnesite and silica, and with limited dolomite involvement at transition conditions from diagenetic to metamorphism. Barite deposit is hosted within Neoproterozoic Nagthat quartzite rocks of outer Lesser Himalaya, wherein its textures, fluid inclusion, sulfur and strontium isotopic studies helped in genetic understanding. Manuscript profile
      • Open Access Article

        3 - Laser Raman Spectroscopy of Chemical Phases in Fluid Overburdens of Copper Mine, Masjid Daghi Gold in Northwest Iran
        solat atalou
        Masjed daghi ore is located within the magmatic-metallogenic zone of Arasbaran and within the division of structural zones in Iran in Alborz-Azerbaijan zone.The vastest rocks in mineralization area are andesite to trachyandesite. There are latite tuff, agglomerate andes More
        Masjed daghi ore is located within the magmatic-metallogenic zone of Arasbaran and within the division of structural zones in Iran in Alborz-Azerbaijan zone.The vastest rocks in mineralization area are andesite to trachyandesite. There are latite tuff, agglomerate andesite, and hornblende porphyry basalt in eastern hills and Eocene flysch in south of the regionThe host intrusive rocks of the mineralization are diorite porphyry are diorite porphyry and alterations include potassic, phyllic, argillic and silicification.The most prevalent mineralization texture is the dispersive texture and other open-space-filling texture, vein and veinlets, have been common either.In addition to stock work zones and thick silicate veins, the presence of diorite and maffic dikes, mineralized grey silicate veins, white silicate, silicate-barite, sulfide, gypsum and calcity are among important phenomena Masjed daghi ore.Petrography studies in 26 doubly polished thin sections and the measurement of geothermometry parameters of 105 primary fluid inclusions were carried out in 6 boreholes in four groups of grey silicate, white silicate, white-grey silicate, and silicate-barite veins.The presence of unknown solid phases, opaque solid phases along with salt phases and eutectic temperature (average of -40.86 Co) of fluid inclusions in Masjed daghi reinforced the necessity of recognizing all phases within fluid inclusions. 10 fluid inclusions were selected based on petrography studies and analyzed by laser Raman spectroscopy method. Laser Raman Spectroscopy was utilized and based on the main peaks of Raman intensity of the minerals such as magnetite, anglesite, malachite, serussite, corundum, orthoclase, anhydriteparagonite, hematite, within fluid inclusions in Masjed daghi area was investigated Manuscript profile
      • Open Access Article

        4 - Jurassic Pb-Zn mineralization at Baba Gholleh
        Farhad Ehya Mohammad Lotfi Iraj Rasa