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Materials & Energy 2014, 13(4): 951-972 Back to browse issues page
Geochemistry, Origin and Geodynamic environment Intrusion Zaker - Sorkheh Dizaj in the Southern Limb of the Tarom Subzone, East of Zanjan
Nematollah Rashidnejad Omran 1, Maryam Nadri 2, Mehraj Aghazadeh
2- Degree of Master of Science in Geology (Petrology) /tarbiat modares university
Abstract:   (3345 Views)
The granitoid intrusion trending NW-SE, is expose in the East of Zanjan, structurally located in the Alborz - Azarbaijan zone and Tarom sub-zone. Petrographic composition of the intrusion includes a range of monzogranite, quartz-monzonite, quartz-monzodiorite to monzodiorite and in fact shows monzonite series composition. The major rock forming minerals consist of K-feldspar, plagioclase, pyroxene (augite-diopside) and quartz. They show granular, intergranular, microgranular to porphyrytic-microgranular textures. The intrusion has metaliminus high-K calc-alkaline to shoshonitic and I-type affinity. Enclaves of the intrusion have micro-granular mafic and monzodiorite, quartz monzodiorite composition, which are fine-grained than their host rock and have micro-granular porphyritic texture. According to the petrographical and geochemical studies, the magma has originated from partial melting of metasomitised sub-continental lithospheric mantle due to fluids and/or partial melts that originated from subduction edge. According to Harker Diagrams seems that monzodiorite magmas differentiation Leads to monzonite Formation And finally the Crystallization and differentiation are monzogranite. Therefore Crystallization and differentiation are the most important processes controlling rock types in the monzonite series intrusion. Tectonic diagrams indicate a continental margin magmatic arc and syn-to-post collisional intra-arc extensional environment.
Keywords: Geochemistry, monzonite series, high-K calc-alkaline to shoshonitic, Tarom, Zanjan
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Type of Study: Research Paper | Subject: Geology
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Rashidnejad Omran N, nadri M, Aghazadeh M. Geochemistry, Origin and Geodynamic environment Intrusion Zaker - Sorkheh Dizaj in the Southern Limb of the Tarom Subzone, East of Zanjan. Materials & Energy. 2014; 13 (4) :951-972
URL: http://jsci.khu.ac.ir/article-1-1645-en.html

Volume 13, Issue 4 (2-2014) Back to browse issues page
نشریه علوم دانشگاه خوارزمی Quarterly Journal of Science  Kharazmi University