Economic Geology
S. Amani Lari; I. Rassa; A. Amiri
Abstract
Ahmadabad Zn-Pb deposit is one of the Pb-Zn deposits in the Kouhbanan-Bahabad metollogeny Belt, which is located 10th Km northwest of Bahabad City in the Posht-Badam Block in Centeral Iran Zone. Ore deposits consist of Zn, Pn, Mo and Sr non-sulfide minerals with large amount of Fe oxide-hydroxide ...
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Ahmadabad Zn-Pb deposit is one of the Pb-Zn deposits in the Kouhbanan-Bahabad metollogeny Belt, which is located 10th Km northwest of Bahabad City in the Posht-Badam Block in Centeral Iran Zone. Ore deposits consist of Zn, Pn, Mo and Sr non-sulfide minerals with large amount of Fe oxide-hydroxide minerals occurred in dolomitic host rock of the Shotori Formation. A quartz-calcite vein accompanies ores in the host rock. This study is focused on C-O isotopic variation in the host rock, quartz-calcite vein and hydrozincite. Isotopic variation of C indicates that the source of carbon is different in the host rock and quartz-calcite vein. The most important source of carbon for hydrozincite formation was carbonate rocks of the area and regarding this aspect this deposit is different from others Zn-Pb non-sulfide deposits that studied in the world. According to oxygen isotopic variation, the temperature for hydrozincite formation was between 14-44˚C. The oxygen isotopic variation suggests marine basin water as the source of quartz-calcite vein. The dolomitic host rock was formed in equilibrium with fluids of a mixture of marine and magmatic waters, based on oxygen isotopic variation.
