Writers : Maafpourian,Gholam Ali;Nimrouzi,Atefe
Refference : The 23th Symposium on Geoscience;Tehran
Publishing Year : 1383

Abstract :
Mashhad _ Fariman _ Torbatjam lineament in the North east of Iran is a lithotectonic boundary,since there is two different types of Permian lithofacies on each side of it. Despite its significance, this area especially its North east magmatic rocks have not been studied complet ely. In addition there are some discrepancies about the nature of ultramafic_ mafic magmatic rocks. in general , there are two interpretation about these rocks:
Geologist who consider these magmatic rocks and associat ed sediments as a ophiolitic remnants of paleotethys (eg. Alavy,S.M 1991, shtoklin, j. 1974), and others who consider them as a volcanic sequence with komatiitic affinity (eg. Sabzehee, M . 1373, Magid, B. 1983).
Investigation of documents relat ed to both of discussed ideas show that there are some evidences ,including field observations and petrographic features that favour the later idea . However , the absence of precise geochemical data such as microprob, trace el ement and isotopic analysis is the major problem that inhibited us for a detail petrogenesis int erpretation. here, just for a general treat, major el ement data of three samples are investigated to indicate the Al2O3 deplet ed komatiitic affinity of these rocks.
Subject List : Magmatic Rocks