QE446 : Mineralogy, Alteration, Geochemistry and Pattern of Formation of Colvary Copper Ore Deposit, North of Shahr-Babak
Thesis > Central Library of Shahrood University > Geosciences > MSc > 2019
Authors:
Sajjad Habilili Sabzouieh [Author], Farajollah Ferdoust[Supervisor], Ali Elahi [Advisor]
Abstarct: Kolvary copper deposit is located 60 km north of Shahr-Babak city (Kerman province). Tectonically this area is part of the Central Iran Construction Unit, located particularly in the southern part of the Urmia-Dokhtar intrusive volcanic belt. The host igneous igneous rocks in this area can be divided into two groups: 1- Eocene volcanic and pyroclastic lava and 2- Porphyry semi-deep intrusive bodies and dykes associated with Oligomycene age Divided. The most important ore-forming minerals include two groups of oxide and sulfide minerals, including malachite, azorite, hematite, goethite and limonite in the oxide portion as cavities and fractures and pyrite, chalcopyrite, Bornite, chalcocite and covolite are scattered and sometimes vein-vein in the sulfide fraction. Alterations observed in the Chalcolarys include potassic, phyllic, argillic and propylitic alterations. baxsed on geochemical diagrams, the volcanic rocks of the mineralization host are mainly in the basalt, trachy-basalt and basalt-trachyandesitic range and intrusive rocks in the granite to granodiorite range. The chemical nature of the inner igneous rocks lies within the calc-alkaline range. Also, according to the tectonic setting diagram, all the studied samples fall within the range of volcanic arcs. According to Pearson correlation graphs, copper has a positive correlation with lead, silver, molybdenum and iron and a negative correlation with zinc. According to the frequency graph of the elements, the amount of copper and molybdenum is 0.6% and 0.0026% respectively and silver is 2.7 ppm. The range of changes of copper grade was from 0.2 to 1.6%, molybdenum from 2.09 to 94.40 ppm and silver from 0.09 to 11.60 ppm. The studied regional rocks are formed in an active continental arc setting. The ore model is a monzonite-type porphyry deposit. The most concentrated minerals are in diorite dykes and are scattered in the surrounding rocks due to the penetration of fluids into them. Numerous siliceous dykes are found in this area, which are formed on the surface by mineral masses of azorite and malachite minerals.
Keywords:
#Petrography #mineralogy #alteration #geochemistry #porphyry copper #Shahr-Babak #Kolvary Link
Keeping place: Central Library of Shahrood University
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