بررسی مراحل مختلف تکوین اسکارن‌های منیزیم‌دار و کلسیم‌دار منطقه جهق – زنجانبر(ایران مرکزی)

The Jehagh - Zanjanbar area located in North East Esfahan. The contact of intrusive rocks with Shotory and Baroot formation have formed two kinds of Mg and Ca Skarns. Mg Skarns of Jehagh area are composed Phlogopite, Clinopyroxene, Forsterite, Spinel,Tremolite, Serpentine and Talc. Phlogopite in these skarns are formed tow kinds of compact and disseminate in the joints and cracks with calcite. The formation of Talc in the skarns Shows temperature of ۴۵۰ C in the environment skarn. The contact bimetasomatic aureoles near Quartz nodules in dolomites formed Hornfels and marbles. In accordance with studs of petrography and sequence of minerals paragenesis they are formed at three stages of Thermal metamorphic, metasomatism and retrograde metamorphism.