QE385 : Mineralogy,geochemistry and genesis of the Dochileh copper deposit,east of Mayamey
Thesis > Central Library of Shahrood University > Geosciences > MSc > 2018
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Abstarct: Dochileh and Touran copper deposits are located 72 km east of Shahrood, 15 km east of Mayamey and in the volcanic belt of northern Central Iran. The stratigraphic sequence of the region contains a considerable amount of volcanic and volcanic-sedimentary deposits of Eocene, which are covered locally by Neogen and Quaternary deposits. The volcanic racks hosting mineralization are comprised of a compositional range of basalt, andesy basalt and trachy andesybasalt tracks spectrum that often contain plagioclase and clinopyroxene Phenocrysts (agite). The copper mineralization mostly occurred along the faults and fractures with the dominant trend of NW-SE in the basalt rocks as vein-veinlet and Open space filling. According to microscopic studies, ore mineralization include primary native copper and hematite, and secondary minerals sun as malachite, goethite, hematite, and waste minerals calcite, zeolite and analcime. The alterations in the host rock include carbonate, analcime- zeolite and iron oxide. The oxidation of mafic minerals such as pyroxene and also magnetite has been responsible for copper resuscitation and hematitic alteration. These rocks show enrichment of light REE and large ion Litophile element and depletion of heavy rare earth elements (REE). Negative anomalies in high field magnitude elements such as Ti and Nb in the studied rocks is one of the typical characteristics of arc environments. According to geochemical surveys, Dochileh copper deposit tectonic environment is consist of a stretch region that formed in a back-arc basin. According to field studies, the Duchileh and touran copper deposit appears to be formed during the process of orogeny along the perpendicular fractures of the folds. Duchileh deposit has a large resemblance to Michigan type copper deposits in terms of tectonic, host rock, mineralogy, mextal content, alteration and mineralization controls.
Keywords:
#mineralogy #native copper #Michigan type #Dochileh #Turan #Mayamey Link
Keeping place: Central Library of Shahrood University
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Keeping place: Central Library of Shahrood University
Visitor: