Writers : Saeidi, M.; Zarrin Kub, M. H.; Mohammadi, S. S.; Khatib, M. M.
Refference : 29th symposium on geosciences
Publishing Year : 1389

Abstract :

Romenjan sub volcanic mass is intruded into south Birjand ophiolite melange at the north of Sistan zone. Main texture of these rocks is porphyry and majority of minerals is Plagioclase, Amphibole and Biotite that are in similar groundmass. Geochemical study shows that this rocks is porphyritic Diorite and Trachy andesite and had a calk- alkalin nature.
High ratio of LREE/HREE and Sr/Y fixation that this rock is high SiO2 Adakite (HAS) and the source may be Eclogite or Garnet Amphiboles (that derived from slab melting metamorphism). Base on tectonic setting diagram and Spider diagram some anomaly like rich in LEE and LIL and lack of HLEE and negative anomalies of some element like Ti and Nb shows that the source magma, created in subduction environment and active continental margin magmatic arc. Main faults of the region located along of dykes and likely effective in control the ascent of this magmas.

Subject List : Ophiolite