TITLE:
Petrography and Mineralography of Emarat Lead and Zinc Deposit (South Arak)
AUTHORS:
Safoura Khani, Ahamd Khakzad, Mehdi Safari, Ali Solgi
KEYWORDS:
Carbonated Host Deposits, Mehdi Abad, Irankouh, Silicification, Alteration, Diagenetic Stage
JOURNAL NAME:
Open Journal of Geology,
Vol.6 No.6,
June
22,
2016
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, pyritizationand hematitizationalso were observed in the deposit. Evidences show that mineralization
has occurred in post diagenetic stage (epigenetic type) and after tectonic
influence.