Petrogenetic interpretation of Cu hosted Eocene volcanic rocks in southwest of Ardestan, East of Isfahan

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Research Paper 01/02/2015
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Petrogenetic interpretation of Cu hosted Eocene volcanic rocks in southwest of Ardestan, East of Isfahan

Sayyed Hossein Roshan, Ali Khan Nasr Isfahani
J. Bio. Env. Sci.6( 2), 439-446, February 2015.
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In the present study, study areas the part of Urumieh- Dokhtar volcanic belt. The main of rocks in this area are Eocene volcanic rocks consist of lava and pyroclastic rocks, with andesite and andesite basalt composition. These rocks are the most important cu-hosting ones in thisareaand have aporphyritic texture, cavity, flow, cellular foam, glomeroporphyritic, poikilitic and spherulitic textures, and in handy specimens are generally fine grained to fine to medium grained. From mineralogical perspective, these rocks include pyroxene, plagioclase, biotite, quartz and amphibole as well as secondary minerals such as epidote, chlorite, calcite and metal ores. These rocks are not immune from alteration and in some parts of very high intensity of alteration due to hydrothermal conditions being seen. Important of alteration kinds in this area are 2 groups consist of chlorite- epidote- calcite and silicate- sericite alteration that focused at andesitic lava and generation by hydrothermal solutions. On the base of minor and trace element geochemical data on diagrams, observations of minerals, rocks and geochemistry indicate that primary magma of volcanic rocks in the area was sub-alkaline, calc-alkaline series. Also the diagrams of the tectonic characteristics show that these rocks were generated in an active continental margin volcanic arc and it is thought that are affected by the subduction. Diagrams of trace elements in volcanic rocks normalized with chondrite and primitive mantle show that enriched of the light rare earths related to heavy rare earth element probably indicates a derivation from the metasomatic mantle.


Aghanabati A. 2007. Geology of Iran.Publication Institute of National Geology and Mine Discoveries of Iran, 586.

Darvishzade A. 1992. Geology of Iran.Danesh-e-Emrooz Press, 901.

Eftekharnezhad J. 1981. The differentiation of different parts of Iran based on structural condition and deposition regions.Oil Forum Magazine, 82, 19-28.

Irvine TN, Baragar WRA. 1971.A guide to the chemical classification of the common volcanic rocks.Journal of Earth Science, 8, 523-548.

Le Bas MJ, Harris Tindle NBW. 1986. The role of aluminum in igneous clinopyroxene with relation to their parentage. American Journal of Science, 260, 267-288.

Middle Most AAK. 1998. Magma and magmatic rocks, In Darvishzade, A &Asiabanha, A. (Edit.)Tehran University Press, 527.

Moinvaziri H. An introduction to magmatism in Iran.TarbiatModares University Press, 440.

Pearce JA. 1984. Role of the sub-continental lithosphere in magma genesis at active continental margins, In Hawkesworth, C J &Norry, MJ. (Edit.), Continental basalts and mantle xenoliths, 230- 249.

Radfar  J.  1998.  A  Geological  Map  of  Iran  (1: 100000).Publication  Institute  of  National Geology and Mine Discoveries of Iran.

Wood DA. 1980.  The  application  of  a  Th-HF-Ta diagram to problems oftectondmaymatie classification. Earth and Planetary Science, 50, 11-30.