Volume 19, Issue 3 (10-2011)                   www.ijcm.ir 2011, 19(3): 529-544 | Back to browse issues page

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Petrography and petrology of A-type granitoids of Eastern Misho mountains with emphasis on their geodynamic importance. www.ijcm.ir. 2011; 19 (3) :529-544
URL: http://ijcm.ir/article-1-439-en.html
Abstract:   (520 Views)

Granitoidic bodies of the eastern Misho mountains (SW Marand – East Azerbaidjan) have intruded into Kahar Formation and mafic – ultramafic rocks of Misho mountains and has faulty contact with Triassic carbonate deposits. The composition of these bodies ranges from quartz monzonite to granite and alkali-granite and it is cut by porphyritic granitic and diabasic dykes. The main minerals of these bodies are pertitic alkali feldspar, quartz and Na-rich plagioclase, accompanied by lesser amounts of biotite and amphibole. In this regard, these bodies belong to hypersolvus granitoids and A2 sub-group of A-type granitoids. The parental magma of these bodies has calc-alkaline to shoshonitic characteristic and show positive anomalies of LILE and LREE, and obvious negative anomalies of Ba, Eu, and HREE. These bodies have emplaced in a post-collisional tectonic setting related to tensional movements after Hercynian orogenic phase and have formed by melting of crustal rocks

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Type of Study: Research | Subject: Special
Received: 2017/05/9 | Accepted: 2017/05/9 | Published: 2017/05/9

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