Abstract
The purpose of this study is to determine the genesis of the manganese indexes around the Hashtroud city, with special regard to Idahlu-Jokandy region. In this region Mn mineralization is sparse and rather extensive. Its origin is from hot springs and precipitated on the earth surface. The mineralization is mainly massive and vein form. Due to presence of hot springs and their traces in the studied area, it can be concluded that Fe and Mn components have participated in the hot springs and by these springs, they have precipitated superficially or penetrated into existing fractures and faults of the region's rocks and caused to mineralization. The main Mn minerals are pyrolusite and psylomelane, accompanied by gypsum, travertine, barite and jasper.
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