Ophiolitic complex of pelagic limestone studies in Northeast of Iran, North of Kashmar

Subject Areas :

Mahnaz Jamshidpour ¹ (دانشگاه آزاد اسلامی واحد نیشابور)
Ali-asghar Ariai ² (دانشیار گروه زمین شناسی دانشگاه آزاد اسلامی واحد مشهد)
Mohsen Allameh ³ (استادیار گروه زمین شناسی دانشگاه آزاد اسلامی واحد مشهد)

Received: 2016-09-07 Accepted : 2016-09-07 Published : 2010-12-22

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Abstract :

In this study, one outcrop of ophiolitic complex of pelagic limestone in North of Kashmar (a part of Sabzevarophiolitic) was examined which was placed in 65 kilometers in North of Kashmar near Khazarbeig village, Itsthickness is about 85 meters. According to done studies on microscopic thin sections that taken from thislimestone section, we determined its age is Middle Campanian to Upper Maastrichtian. The fossils generallyconsist of families Foraminifera, Globotruncanidae, Globigerinidae, Hedbergelidae and Heterohelisidae.According to Biozonation ( Caron, 1985), in this limestone we have 7 Biozones, G. levate, G. ventricosa, G.calcarata, G. havanesis, G. aegyptiaca, G. gansseri, A. mayaroensis. Furthermore, the name of this limestone inthis section according to Dunham(1962) is Bioclastic wackestone and Bioclastic packstone. Considering thisstudies, the facies of this limestone, according to Wilson model (1975), is FZ1 and standard Microfaciesaccording to Flugel(2004) is SMF3. The result of this study is that the sedimentary environment of this carbonatesection is Deep Sea ( Deep Sea and Cratonic deep- water basin) with pelagic facies