The results of microprobe analysis indicate four different kinds of amphiboles in Astaneh pluton and its subvolcanic rocks in the Sanandaj-Sirjan zone. The composition of these amphiboles in this area are magnesio hornblende in tonalite and quartz dioritic enclaves, actinolite in granodiorite and monzogranite, pargasite in dacititc enclaves and anthophillite in one tonalitic sample formed by re...

The volcanic rocks with the Plio-Quaternary age, are exposed in the northern part of the Sanandaj-Sirjan zone, in northwest Urmia. The main mineral phases are olivin + clinopyroxene ± plagioclase, that are present as both phenocrysts to microcrystalline with other minor minerals. The dominant textures of these rocks are porphyry, microlithic porphyry, hyalo-porphyry, glomeroporphyritic and vesi...

Garnet bearing staurolite schists comprise an important part of regional metamorphic succession in the Hamedan area (north of the Sanandaj-Sirjan zone). These rocks contain staurolite and garnet porphyroblats that lie in a matrix which is composed of biotite, muscovite and quartz. The staurolites in Fe-rich and show little chemical composition diversities. Almandin is the most important compone...

Gabbroic rocks of Sarkobeh region are exposed as several intrusive bodies with a post-cretaceous age in north of Khomein city, Northern Sanandaj-Sirjan Zone. These igneous rocks are intruded in shale and limestone units which belong to cretaceous age. Main minerals forming the rocks are clinopyroxene, plagioclase and opaque. Microprobe analyses on the clinopyroxenes of the gabbros show a diopsi...

Band-e-Ziarat ophiolitic complex is located approximately about 45 Km south of Kahnuj, Kerman Province. The complex is a horst structure at the western boundary of the Jaz Murian depression, southern Lut block and southeastern Sanandaj-Sirjan zone. It bounded to the east and to the west by two major north-south trending fault zones of Jiroft and Sabzevaran. The complex is mainly composed of low...

The granite-gneiss body of  Abadchi area (vicinity of Zayandeh-Rud dam) is a part of Sanandaj-Sirjan tectonic zone. The mineralogical composition of the granite- gneisses contains quartz, K-feldspar, plagioclase, biotite and muscovite and minor minerals of opaque, zircon, amphibole and allanite. The granite-gneiss rocks have been influenced by deformation dynamics and weakly Na-metazomatism. Ge...

The Qalaylan pluton of Late Jurassic age is composed of intermediate and felsic rocks that crop out in the northern Sanandaj-Sirjan Zone. A body is comprising alkaline, high K, Ferroan A1-type rocks with contrasting aspects; whiles, Nd-Sr primitive isotopic composition consistent with a mantle source. On the other hand, inherited zircon cores (with a range of 230 – 2700 Ma) and elevated Nd mode...

Subplutonic rocks of North Shahrekord at south-west of Iran as a part of Sanandaj - Sirjan tectonical zone have exposed as basic dykes. These rocks are dolerites with specific textures such as intergranular, intersertal, ophitic and poikilitic. The main constituteud minerals of the dolerites are plagioclase and clinopyroxene. The secondary minerals include sericite, calcite, chlorite, epidote, ...