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توده های نفوذی مهرآباد واقع در جنوب شرق اردستان، با سن تقریبی الیگوسن- میوسن، در بخش میانی کمربند ماگمایی ارومیه - دختر جای گرفته اند. این توده ها با ترکیب سنگ شناسی گرانیت، گرانودیوریت، تونالیت و کوارتز مونزودیوریت، در سنگ های آتشفشانی ائوسن منطقه تزریق شده اند. توده های نفوذی مورد مطالعه با ماهیت کالک آلکالن و متا آلومین تا جزئی پرآلومین، جزو سنگ های گرانیتوئیدی نوع i محسوب می شوند. الگوی تغی...

More than 20 tonalitic to granodioritic plutons with Oligo-Miocene age had intruded the Eocene volcanic rocks, in south-east of Urumieh- Dokhtar magmatic belt, north-west of Shahre-Babak. These rocks show granoporphyritic texture and consist of phenocrysts of plagioclases (An21-An44), with normal to reverse zoning, magnesio hornblende and tshermakite and biotites. The matrix consists of fine-gr...

Sarvian intrusion is located in northeast of Delijan in the Orumieh-Dokhtar magmatic belt. Sarvian pluton consists of acidic and intermediate units and is composed of granite, granodiorite, tonalite and quartz-diorite. Main minerals of the intrusion are plagioclase, amphibole, biotite, quartz and K-feldspar. In this research, based on the EPMA analyses, thermobarometry of the rocks investigated...

Chah Torsh intrusive body in S-W of Nadushan is a small part of extensive magmatism of Oligo-Miocene age in Urumieh-Dokhtar magmatic belt. This is the largest intrusive mass of SW of Nadushan complex which are all outcropped as masses cut through Eocene volcanics. The Chah Torsh intrusion consists of two phases with porphyry and granular textures. Geochemical properties of two phases on the bas...

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Spid pluton with Neogene age outcrop in the Urumieh-Dokhtar Magmatic belt. Amphibole in this intrusion is calcic and magmatic and its composition corresponds to magnesiohornblende to actinolite which reflects the type I granitoid. Geobarometry calculations show that the amphibole crystalized at pressure of 2.5 to 3.7 kbr corresponding to a depth of 8 to 12 km. Based on geothermometry of hornble...

The Middle Miocene Niyasar granitoid complex is located in west of Kashan and in the Urumieh – Dokhtar magmatic belt. Based on petrographic studies, the Niyasar complex is composed of tonalite, quartz-diorite and diorite intrusive rocks. These rocks are mainly composed of quartz, plagioclase, amphibole, biotite and K-feldspar. The amphiboles belonge to calcic group and vary in composiotion from...

The Nabar plutonic rocks is located in the northwest of Isfahan and in the Urumieh-Dokhtar magmatic belt. Based on the petrologic studies, the Nabar complex is composed of gabbro, gabbro-diorite, diorite, quartz diorite, tonalite and quartz monzonite. Mineral chemistry shows that pyroxenes are Na-poor in composition and are classified as clinopyroxenes and orthopyroxenes which are diopside and ...