Shahmirzad village is located on the
southern parts of the Eastern Alborz Mountain
Ranges. One of the sedimentary rock units that crops
out in this area is Soltanieh Formation (Upper
Precambrian Lower Cambrian). Thin section and
oxygen isotope studies have been used in order to
determine the petrological characteristics and the
temperature of Soltanieh dolomites formation
environment. Examination of the petrographic
properties of the dolomite samples, along with
geochemical data reveals that all of the dolomite
samples are diagenetic (secondary) and were formed
under reducing conditions in shallow to deep phreatic
environment. The heaviest and lightest IRO values
illustrate that temperature of early to late diagenetic
dolomites range from 72 t to 113.5 t respectively.