| Poly Phase Metamorphism of Pelitic Rocks of Hamedan Area, West Iran Based On Petrography Evidences |
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| 关键词:poly phase metamorphism pelitic rocks Iran prograde metamorphism retrograde metamorphism |
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| Poly Phase Metamorphism of Pelitic Rocks of Hamedan Area, West Iran Based On Petrography Evidences |
| The study area is located in the northern part of Sanandaj-Sirjan zone in western part of Hamedan province in Iran. Estimation of times of these events is based on the 40K–40Ar age determination carried mainly on separated amphiboles, biotites and muscovites, and interpreted as the ages of their isotopic closure. Estimations range between 91 and 70 Ma (A. Baharifar et al., 2004). The Sanandaj–Sirjan zone of western Iran is a metamorphic belt (greenschist–amphibolite facies) that uplifted during late Cretaceous continental collision between the Afro-Arabian continent and the Iranian micro-continent. The Alvand plutonic mass is the most important aspect of igneous phenomena of this area. The plutonic rocks are generally confined to granitoidic such as granite, alkali-granite, monzodiorite, diorite, monzodioritic gabbro, monzogabbro, pegmatite, aplite etc according to IUGS clas-sification. |
| Monireh POSHTKOOHI.2009.Poly Phase Metamorphism of Pelitic Rocks of Hamedan Area, West Iran Based On Petrography Evidences[J].Acta Geoscientica Sinica,30(S1):50-60. |
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