In this paper, metamorphic conditions (T, P and fluid composition) in greenschist to amphibolite facies transition zone are investigated using textural evidence, compositions of the minerals and phase diagrams. Metabasits from the south of Kordestan province were metamorphosed from sub-greenschist to upper amphibolite facies. Field observations and petrography studies show that there are some r...

Isotropic gabbros of Kermanshah ophiolite include olivine gabbro, gabbro, gabbronorite, olivine gabbronorite and troctolite. The isotropic gabbros are medium to fine grained with euhedral to subhedral orthopyroxenes, clinopyroxenes and subhedral plagioclase, olivine together with rare amphiboles. Mineral chemistry of isotropic gabbros reveal that the clinopyroxenes are diopsidic to augitic in c...

The Tashtab bentonitic clay deposit is located about 25 km southwest of Khur and Biabanak, Isfehan Province. This deposit is a product of alteration of ignimbrites with the age of early Eocene. Mineralogical examinations demonstrated that montmorillonite, saponite, quartz, nontronite, beidellite, microcline, anorthite, illite, albite, and calcite are the major mineral phases which are accompani...

The Baba Ali deposit is located about 39 km to the north west of Hamadan city. The syenitic pluton intruded and metamorphosed the diorite host rock producing the skarn deposit. Geochemical considerations indicate that the concentration values of rare earth elements in the syenite and diorite range from 35.4 to 560 ppm.  Rare earth elements variation in syenitic, skarn and diorite rock are simil...

The Bayazeh ophiolite, with Paleozoic age, is located in the eastern margin of the Yazd Block (Central Iran). This ophiolite consists of serpentinized peridotites, metagabbro, ultrabasic metamorphosed dikes, metapicrite, serpentinite and metalistvenite. Rock forming minerals of the metapicrites in the Bayazeh ophiolite are olivine (completely altered to serpentine), clinopyroxene (diopside, aug...

Chahrisseh magmatic rocks are located in the northeast Isfahan, in the Sanandaj-Sirjan structural zone and parallel to the Qom-Zefre fault. These magmatic masses are located in a continuous section of Permian-Triassic sediments and rarely enter the Early Triassic beds. These rocks contain anhydrous ferromagnesium minerals (olivine, clinopyroxene and plagioclase), hydrous ferromagnesium minerals...

The Qotur metamorphic complex consists of metabasites, gneisses, marbles and calc-silicates as well as serpentinites which is cropped out at the west border of West Azerbaijan and Turkey. The amphibolites from the Qotur metamorphic complex can be classified as two types of ortho- and para-amphibolites. Minerals in this ortho-amphibolite are hornblende, plagioclase, zircon, titanite, and opaque ...

Dardvey iron skarn ore deposit is located in the central part of the Sangan mininig area, northeastern Iran. In this study, silicate geothermometr were used to estimate the formation temperatures of skarn zones in Dardvey Fe-skarn deposits. The main metamorphic minerals in prograde and retrograde skarn zones are garnet-clinopyroxene-tremolite/actinolite-amphibole-chlorite-epidote-feldspar-phlog...

The Kermanshah ophiolite Complex is located in the structural – tectonic zone of the western Iran in northern part of Zagros main thrust and is a part of highly dismembered Kermanshah – Panjvin ophiolite belt. The poly metamorphic zone in this region is mainly related to the development and tectonic emplacement of the ophiolite. Some of the metamorphic rocks (Jade and its simulants) have so ​​h...