QE326 : Mineralogy, geochemistry and genesis of the Dareh- Takht Cu deposit, (South of Azna- Lorestan province)
Thesis > Central Library of Shahrood University > Geosciences > MSc > 2017
Authors:
Abstarct: Dareh - Takht copper deposit is located 10 km south of Azna, on the structural zone of Sanandaj - Sirjan. Rock units in the area, ranging Triassic to Eocene in age. baxsed on field investigation and petrographic studies, rock units including; 1) sedimentary (limestone and chert- bearing dolomitic limestone), 2) volcanic (andesite, trachy- andesite and basaltic andesite) and 3) pyroclastic (crystal tuff and lithic tuff). All rock units have been mextamorphosed to the green schist facies. baxsed on the results of geochemical analysis, volcanic rocks belong to the calc-alkaline magmatic series. In terms of position and formation environment, it is related to the subduction zone (continental volcanic arc). The effective factors on copper mineralization in the study areas including: a) the lithology of host rocks, b) structural controls, c) hydrothermal and mextamorphic fluids, and d) The presence of intrusive bodies. The mineralization observed as in the pyroclastic units with the composition of andesitic, trachy andesite and basaltic andesite. The ore minerals are formed as veins and vein- veinlet, cavities and open space filling and disseminated. Alteration zones include chloritic, epidotic, sericitic, carbonate, silicification and iron oxide in this area. The ore deposit- forming minerals comprise four groups: 1) Sulfide (pyrite, chalcopyrite, bornite, chalcocite, coveline, pyrargyrite, proustite and tetrahedrite), 2) Copper oxides and carbonates (malachite, azurite, cuprite and brochantite), 3) Iron oxides (magnetite, hematite, goethite and limonite), and 4) gangue minerals (quartz, calcite and gypsum).Copper grade is above 1% and shows the highest correlation with the silver. Finally, regarding our research the mineralization in Dareh- Takht region, similar to hydrothermal vein deposits and the most matching to the manto- type copper deposit.
Keywords:
#Mineralogy #geochemistry #copper #hydrothermal #Manto #Sanandaj-Sirjan #Azna #Lorestan Link
Keeping place: Central Library of Shahrood University
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Keeping place: Central Library of Shahrood University
Visitor: