چكيده لاتين
Faiz Abad Mine is located 120 km east of Isfahan and 10 km southwest of Nain. This range is located between 32° 47ʹ north latitude to 32° 50ʹ and 52° 56ʹ to 52° 58ʹ east longitude. Faiz Abad field, in terms of geo-structural divisions of Iran, is located in the middle part of Urmia-Dokhtar magmatic belt and has two separate blocks including Kharzen Mountain and Agha Chasab. Outcrop units in the studied area with probable age of Paleozoic (?) from old to new include chlorite schist unit, recrystallized gray limestones and white marbles with interlayers of shale limestone, and the diabase unit is in the form of dykes and floods. These units have penetrated. Due to the movement of the right-round strike-slip faults of Qom-Zafrah and Nain-Baft, the area has been subjected to restraining overlap and compressive duplexes or positive flower structures. In response to the tectonic and compressive forces in the northwest-southeast direction, the folds of the Agha Hasab block and the Kharzan mountain have expanded in the form of an anticlination with the longitudinal axis of the northwest-southeast in this zone. The Faiz Abad fault, which is the main controller of mineralization, was introduced in this research based on the processing performed on the AST-L1T image and field evidence and mineralization. Mineralization in this deposit has taken place along the fractures and branches of the Faiz Abad fault, and in fact, the faults, fractures and tectonic structures control the mineralization and the shape of the mineral in this area. Mineralization in Faiz Abad deposit has occurred late in white and gray marble units with dolomite alteration and to a lesser extent in chlorite schist. Dolomitization and, to a lesser extent, silicification with limited expansion, are recognizable changes in the studied area, and dolomitization is the most important change related to mineralization. Based on petrographic studies (shape and size of crystals), five types of calcite have been identified, which include fine-grained, medium-grained, coarse-grained, oriented, and delayed calcite veins. In Faiz Abad deposit, the dolomites are flat and shaped with a well-shaped rhombus, in addition to the coarse andolomites, saddle crystal related to mineralization is also seen. Faiz Abad deposit has a complex paragenetic sequence and three phases of mineralization have been identified based on field studies and mineralogical investigations. Primary minerals include sphalerite, galena, pyrite and chalcopyrite, which are As a result of exogenous and secondary processes, they have become hemimorphite, cerusite, chalcocite and iron oxides (hematite, goethite and limonite). The most obvious structures and textures include void filling, shearing, vein-veining, replacement, chalcopyrite in sphalerite and spongy pyrites. Based on recognizable mineralogical and textural features, 3 generations of sphalerite, 3 generations of galena, 3 generations of pyrite and 2 generations of chalcopyrite have been identified in the region. The study of the fluids inclusion in Faiz Abad deposit has been done on sphalerites of the first and second generation and their accompanying calcites. Based on thermometric studies, two groups of inclusion fluids can be distinguished, which include two-phase and three-phase involved fluids. Homogenization temperature for Sp-1 and Sp-2 sphalerites is between 182-95°C and for coarse-grained calcites between 154-92°C and for fine-grained calcites with mineralization between 180-94°C is. Based on the studies of the fluids inclusion in the origin of the mineralizing fluid, it was determined to be a basin, and the boiling and cooling events played an essential role in the
