تحليل رخساره اي و جايگاه چينه اي كاني سازي سرب و باريت در ناحيه خاوري انارك (شمال باختري معراجي )

Facieses analysis an‎d stratigraphical position of barite an‎d lead mineralization in east of Anarak region (NW Meragi)

زمين شناسي

above the Jamal Limestone Formation (Permian) an‎d on the northern margin of the Yazd block an‎d near the Kavir Bozorg-Biabanak fault. Geological studies indicate that extensive tectonic phases such as thrusting an‎d faults in the Jamal Limestone Formation an‎d the Triassic dolomitic formation have played an important role in the formation of mineralization. Ophiolite outcrops (gabbro an‎d serpentinite) an‎d Anarak accretionary complexes (Carboniferous) an‎d Formation of Listvenite indicate the existence of an active tectonic environment that influenced the emplacement of mineralization. Geochemical studies, due to the effects of metamorphic conditions an‎d the remobilization of elements from serpentinite outcrops an‎d their leaching by fluids, reveal geochemical characteristics of a transitional, redox environment related to metamorphic conditions influenced by serpentinite outcrops. Binary diagrams, spider graphs, an‎d principal component analysis (PCA BiPlot) separate the elements into groups of mafic elements, elements formed in a marine environment, an‎d elements associated with mineralization. The anomaly of lead an‎d zinc elements in the study area falls within the range of sedimentary deposit types. Fluid inclusion studies showed homogenization temperatures between 127 an‎d 299°C an‎d salinities of 4.2 to 13.02 wt% NaCl eq, indicating low to moderate salinity chloride (MgCl2, CaCl2) fluids. These conditions, along with microthermometry data an‎d ligan‎d transport diagrams, suggest metal transport by sulfide complexes. Geological, mineralogical, geochemical, an‎d fluid inclusion evidence collectively indicate that the Meraji lead deposit, due to metamorphic conditions, the mechanism of dilution of basin fluids with seawater under transport conditions by sulfide compounds, an‎d on the other han‎d, the ore-forming type estimation diagram, exhibits characteristics of the Irish-type mineralization an‎d is similar to exhalative vent deposits.

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