چكيده لاتين
In this thesis, an attempt has been made to compare the geology, mineralization, alteration and fluid inclusions in the three zinc and lead deposits of Areh Gijeh, Emarat and Qar morvarid. The three deposits mentioned are located in the Malayer-esfahan metallogenic belt (MEMB), and in the Sanandaj-Sirjan structural zone. According to some tectonic studies conducted in the Sanandaj-Sirjan structural zone, the Malayer-esfahan metallogenic belt was formed in the back-arc tensional environment resulting from the subduction of the Neotethys ocean under the Sanandaj-Sirjan structural zone. The stratigraphic sequence in the three deposits of Areh Gijeh, Emarat, and Qar morvarid begins with the dark-colored units of the Jurassic clastic (only in Qar morvarid) and then conglomerate, sandstone, dolomite, and thick-layer limestone unit (Kl) and There is an alternation of shale, marl and limestone (Ks). The upper part of the unit (Kl) is the dolomitized unit (Kld), which is the main host of mineralization in the two deposits of Areh Gijeh and Emarat. The host rock of mineralization in Areh Gijeh is at the boundary between limestone and shale of the Lower Cretaceous, in Emarat between shale and limestone, and in Qar morvarid at the boundary between shale and conglomerate of the Lower Cretaceous. Alterations of silicification and carbonation are significantly spread in three regions, after which dolomite alteration is more important. The primary ore of Areh Gijeh deposit is of oxide type, in Emarat deposit it is of oxide-sulfide type and in Qar morvarid it is of oxide-sulfide type. Mineralization in three deposits is epigenetic, which can be seen in forms such as vein-veinlet, space-filling, and replacement. Geothermometric studies of fluid inclusions in three regions were conducted on calcite, quartz and sphalerite samples prepared from these three deposits and different types of involved fluids were detected and the phase of most of these fluids was liquid-gas phase. According to the studies, the homogenization temperature in Areh Gijah is 142 to 207 degrees Celsius, 130 to 217 degrees Celsius in Emarat, and 133 to 330 degrees Celsius in Qar morvarid. The salinity of fluids is 7.59 to 13.72 in Areh Gijah and 7.59 to 19.84 in Emarat and 3.71 to 16.24 weight percent of table salt respectively, which the range of homogenization temperature values and the salinity of fluids involved in the three studied deposits can show the important role of mixing be in their constituent fluid. The amount of lead in Areh Gijeh area is between 0.32 and 6.54%, the amount of zinc is between 0.12 and 7.60%, and lead value in the area of Emarat between 1.46 and 17.82%, the amount of zinc is between 2.86 and 15.92%. Based on geological evidence, alteration and involved fluids show that the mineralization in the three regions of Areh Gijeh, Emarat, Qar morvarid has the most similarity with the Irish and Sedex types.
