Abstract
Iran is host to more than 285 zinc and lead carbonated host deposits including world-class deposits such as Mehdi Abad and Irankouh. Emarat deposit is located in Sanandaj-Sirjan zone and Malayer-Isfahan metallogenic province (northwestern part of Sanandaj-Sirjan tectonic zone). In the area, the mineralization has stratabound shape and restricted to Early Cretaceous limestones and dolomites. With investigation of the optical properties in microscopic survey and evaluation results of analysis, sphalerite, galena, pyrite and chalcopyrite were recognized as the main minerals, covellite, tennantite-tetrahydrite and serosities, quartz and barite as the secondary minerals and gyps, smithsonite were recognized as the minorminerals in the samples. Silicification alteration acted as major process in studied deposit and dolomitization, pyritization and hematitization also were observed in the deposit. Evidences show that mineralization has occurred in post diagenetic stage (epigenetic type) and after tectonic influence.
Highlights
Iran, given the appropriate geodynamic conditions, has widespread areas of high potential for zinc-lead carbonated host deposits or large carbonated platforms
More than 285 carbonated host deposits exist in Iran, including world-class deposits such as Mehdi Abad and Irankouh
There is no common consensus on the classification of MVT deposits hosted by Cretaceous carbonate rocks, especially in SanandajSirjanzone
Summary
Given the appropriate geodynamic conditions, has widespread areas of high potential for zinc-lead carbonated host deposits or large carbonated platforms. Some authors consider them as exhalative deposits [12] but the recent studies [4] [7] have attributed them to MVT deposits Most of these deposits have been formed near the opening of northern Paleotethys of Iran, showing a close relationship with the crustal tectonic events [16]. Emarat deposit geologically and structurally belongs to Sanandaj-Sirjan zone and locates in Malayer-Isfahan metallogenic province (northwestern part of Sanandaj-Sirjan tectonic zone) (Figure 1). This deposit lies in the western part of central Iran and 50 kilometers southwest of Arak City and 30 km off West Khomein City. Emarat deposit with 5.12 million tons proved reserves and average grade of 5% zinc and 2% lead, in operation with annually extraction capacity of 90,000 tons of mineral from the endogenous part [5] is considered the largest and most significant zinc and lead deposit in the south Arak mineral zone located in the middle part of Malayer-Isfahan belt
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