QE346 : Mineralogy, geochemistry and genesis of Lakhshak antimony ore deposit, northwest of Zahedan
Thesis > Central Library of Shahrood University > Geosciences > MSc > 2017
Authors:
Gholam Reza Mazloom [Author], Farajollah Ferdoust[Supervisor], Mahmood Kahrazehi [Advisor]
Abstarct: The area of Lakhshak antimony ore is located 28 km in northwest of the Zahedan. baxsed on field studies, the prevailing stones in the studied area include: Genesis, Quartz-schist, Calcschist, Quartz Monzodiorite, Granite-Diorite, Microgranite, Daciticporphyric and Rhyolite, and etc. Intrusive bodies and subalkanic dikes have penetrated the composition of dacite to rhilly within the units of the schists and formed by regime tectonic of Continental margin subdoction. The controlling factors for mineralogy in the study area are 1- lithology of the stones including 2-structural control 3- presence of intrusive bodies in depth as a thermal agent 4- hydrothermal solutions flowed in suitable stones with an appropriate lithology and has resulted in the concentration of antimony. The most important facies observed in the Lkhshak antimony ore is formation of the vessel and and the controlling factor is the existence of joints and fractures. The major mineralization phase of the region was happened to fill empty spaces, masses and successions. The most important alterations in the study area are silicic, argilitic, carbonate, choloritic and iron hydroxide Altrations. baxsed on microscopic studies and XRD, the main ore minerals formed in the region are primary (hypogene) and secondary (supergene) and six groups: a) sulfide minerals (Stibenite, Galen, Sphalerite, Pyrite), b) carbonate minerals (serozite), c) sulfate minerals (Anglesite and Jarosite), d) silicate minerals (Hemimorphite), e) minerals hydrochloride (Paralornite), f) minerals hydroxide (Lizite and Goethite) and major gangue mineral (Quartz). The results of geochemical study showed that most solidarity in the Lakhshak region between copper and lead, cadmium and lead and antimony, gold and arsenic. baxsed on microtremometry study, the temperature of homogeneous fluid transition is between 157 °c and 250 °c and the range of salinity changes varies from 0.8 to 6.62% by weight of salt. Finally, baxsed on the results of this research the kind of mineralization is quartz- stibenite epithermal vein and mineralogy fluid is composition of this ore was happened at low temperature and low salinity.
Keywords:
#Antimony #Epithermal vein #Mineralogy #Geochemistry #The Lakhshak Link
Keeping place: Central Library of Shahrood University
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