Thermometry corresponding from deformation twining of calcite in limestones and chlorites geothermometry in Sarkobeh gabbroic body

Sarkobeh area is located north of Khomein in the most unstable tectonic zone (Sanandaj - Sirjan). In the area, exposed rocks are limestone, quartzitic rocks and  gabbro (alkaline gabbro). The main minerals in rocks are, plagioclase, clinopyroxene and opaque, while the accessory minerals include biotite, amphibole, quartz, apatite, zircon as and chlorite and prehnite - pumpellyite are  representative of the alteration minerals. According to the texture of the rock forming minerals of the gabbro rock at the greenschist facies, metamorphism of greenschist facies have been endured.  Petrographical studies were carried out on the mineral calcite in the marbles and twins deformation of type III and IV showed that calcite deformation temperature is in the range of 200°C to more than 250°C. According to the chlorite mineral thermometry, minerals have formed at 296 °C to 309°C.