Paper Information

Title: 

INTRUSION RELATED MINERALIZATIONS AT KUHE-DOME WITH SPECIAL REFERENCE TO GOLD MINERALIZATION AND THE MODEL FOR EXPLORATION

Type: PAPER
Author(s): MEHRABI BEHZAD*,RABIEI AHMAD
 
 *DEPARTMENT OF GEOLOGY, TARBIAT MOALEM UNIVERSITY
 
Name of Seminar: SYMPOSIUM OF EARTH SCIENCES
Type of Seminar:  SYMPOSIUM
Sponsor:  ORGANIZATION OF GEOLOGICAL OF IRAN
Date:  2006Volume 24
 
 
Abstract: 

Kuhe-Dome magmatism is occurred in the Eocene volcanic zone of Tertiary volcanic belt of Central Iran. It is characterized by magnetite series features, related to subduction zone with calc-alkaline nature. The intrusion is mainly garanodioritic and intruded in Paleozoic metamorphic rocks, Cretaceous limestone, lower Eocene andesite, tuff and rhyolite in upper Eocene time, followed by numerous dykes cutting intrusion and country rocks. Granodiorite is composed of plagioclase, microcline, hornblende, biotite and quartz with minor apatite and sphene. Granite intrusion experienced a weak hydrothermal alteration. Patchy kaolintization of feldspar and chloritization of mafic minerals occurred in granodiorite and diorite. Massive epidotization is recognized in some parts of intrusion. Silicification with minor tourmaline and monazite is widespread along faults. Differentiation and oxidation ratios in Kuhe-Dome intrusion are comparable with the Au-Bi host intrusions. Mineralizations are related to granodiorite which shows regional zonation from quartz veins inside and in border of intrusion with Au+Cu±Bi±W paragenesis, proximal Fe±Cu skarn, Au+Ag+Cu+As+W±Pb veins and distal base metal mineralization. Main parts of mineralizations have been eroded which create a possibility of gold and tungsten placer formation in surrounding areas.

 
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