University of Isfahan Petrological Journal 2228-5210 8 29 2017 05 22 Mineralogy and Genesis of Joveinan Iron Skarn (Cenozoic Magmatic Arc, North of Isfahan) Mineralogy and Genesis of Joveinan Iron Skarn (Cenozoic Magmatic Arc, North of Isfahan) 89 108 21541 10.22108/ijp.2017.21541 FA Shahzad Sherafat Department of Geology, Payame Noor University, Tehran, Iran Mohammad Ali Mackizadeh Department of Geology, Faculty of sciences, University of Isfahan, Isfahan, Iran Journal Article 2016 05 19 Joveinan marbles and skarns are located 5 km NE of Ghohrood and 140 km NW of<br />Isfahan in the *central part of Urumieh- Dokhtar magmatic arc. Intrusion of Ghohrood<br />granitoid into the Cretaceous carbonate rocks caused the contact metamorphism and<br />formation of skarn mineral paragenesis wollastonite, clinopyroxene, garnet, actinolite,<br />epidote, chlorite, calcite, quartz, magnetite and sulfides (iron and copper). Mineralogical<br />studies and paragenetic mineral relations confirm that the Joveinan skarn is polygenetic<br />in origin and evolved in two major stages, metamorphism and metasomatism<br />(progressive and retrogressive). In metamorphism stage that occurred immediately after<br />the granitoid magma emplacement within carbonate rocks, Joveinan marbles were formed. Metasomatic stage occurred with generation of anhydrous calc-silicates<br />minerals such as wollastonite, diopsidic-hedenbergitic pyroxene and ugrandite garnets.<br />The main stage of retrograde metasomatic, alteration of primary calc-silicate minerals of<br />skarn (pyroxene-garnet), caused the formation of epidote, actinolite and chlorite. The<br />association of wollastonite, magnetite and andradite represents that skarn crystallized in<br />over 550 ° C temperature range and low partial pressure of CO2. Joveinan skarn is a<br />calcic skarn that has been formed at shallow depth by oxidative hydrothermal fluids and<br />evolved in different stages. Joveinan marbles and skarns are located 5 km NE of Ghohrood and 140 km NW of<br />Isfahan in the *central part of Urumieh- Dokhtar magmatic arc. Intrusion of Ghohrood<br />granitoid into the Cretaceous carbonate rocks caused the contact metamorphism and<br />formation of skarn mineral paragenesis wollastonite, clinopyroxene, garnet, actinolite,<br />epidote, chlorite, calcite, quartz, magnetite and sulfides (iron and copper). Mineralogical<br />studies and paragenetic mineral relations confirm that the Joveinan skarn is polygenetic<br />in origin and evolved in two major stages, metamorphism and metasomatism<br />(progressive and retrogressive). In metamorphism stage that occurred immediately after<br />the granitoid magma emplacement within carbonate rocks, Joveinan marbles were formed. Metasomatic stage occurred with generation of anhydrous calc-silicates<br />minerals such as wollastonite, diopsidic-hedenbergitic pyroxene and ugrandite garnets.<br />The main stage of retrograde metasomatic, alteration of primary calc-silicate minerals of<br />skarn (pyroxene-garnet), caused the formation of epidote, actinolite and chlorite. The<br />association of wollastonite, magnetite and andradite represents that skarn crystallized in<br />over 550 ° C temperature range and low partial pressure of CO2. Joveinan skarn is a<br />calcic skarn that has been formed at shallow depth by oxidative hydrothermal fluids and<br />evolved in different stages. https://ijp.ui.ac.ir/article_21541_829bb619f4688ead3821bdd3d050c25a.pdf