نتایج جستجو برای: granitoid
تعداد نتایج: 560 فیلتر نتایج به سال:
The Miocene Qohrud granitoid intrusion consists of granite, granodiorite and tonalite and is located in the Urmia-Dokhtar magmatic belt. Intrusion of magmatic rocks into the various sedimentary rocks including shale, sandstone, limestone and marl, with Jurassic to Eocene age, has caused contact metamorphism of the surrounded rocks. Varity of hornfelses and skarns are formed in this regards. Hyd...
The granitoid intrusions of Dehnow, which is located in northwest of Mashhad in immediate contact with garnet-rich hornfels, contain large crystals of garnets. They provide an excellent opportunity to study the effect of host rocks in contamination of a garnet-bearing granitoid magma. The garnet crystals contain abundant inclusions that are indicative of igneous phases and are arranged in a ci...
chemical characteristics of biotite from boroujerd granitoid complex (middle jurassic), western iran
biotite samples from different units of boroujerd granitoid complex (bgc) of the sanandaj-sirjan zone, western iran, have beenanalyzed by electron microprobe for major elements. biotite analyses from three units of quartzdiorite, granodiorite and monzograniteof bgc have their own distinct non-overlapping compositional fields in the annite – siderophyllite – phlogopite – eastonitequadrilateral (...
Abstract Calculating the temperatures of magmas from which granitoid rocks solidify is a key task studying their petrogenesis, but few geothermometers are satisfactory. Zircon saturation thermometry has been most widely used because it conceptually simple and practically convenient, based on experimental calibrations with significant correlation calculated zircon temperature ( T Zr ) zirconium ...
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