Laser Raman Spectroscopy of Chemical Phases in Fluid Overburdens of Copper Mine, Masjid Daghi Gold in Northwest Iran

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