Authors : Zohreh Esmaeili, Gholamreza Fotohirad and Mohammad Hossein Yousefzadeh
Abstract: The study area is located in North of Dezq village in southwestern of Hagiabad. Mineralogical and geochemical investigations is showing two main stage of prograde and retrograde metamorphism in formation of skarn in study area. In prograde stage has formed skarn with anhydrous silicate-calcium mineral assemblage (andradite-grossular and diopside-hedenbergite) in temperature range of 328-599° which has similar composition with garnets from Cu-Fe and Au skarns. In retrograde stage, a part of these anhydrous silicates are affected by retrograde metamorphism and changed to hydrous and anhydrous silicate minerals with less calcium (epidote, tremolite-actinolite) and finally hydrous and anhydrous calcium assemblage has altered to fine grain minerals including chlorite, calcite, quartz and clay minerals in temperature range of >300°.
Zohreh Esmaeili, Gholamreza Fotohirad and Mohammad Hossein Yousefzadeh, 2017. Mineral Chemistry and Temperature Determination of Skarn Formation in Dezg Area, Southwestern of Hajiabad, North of Birjand. Online Journal of Earth Sciences, 11: 1-9.