Writers : Moosavi, S. M.; Alavi, S. A.; Khatib, M. M.; Noroozi, Gh. R.
Refference : The Forth National Geological Conference of Payam Noor University(PNU)
Publishing Year : 1389

Abstract :

The Givshad Sub volcanic mass is located in the south of Birjand ophiolite mélange zone. Up to now, from the point of view of establishment structure, these masses are not exactly determined and various assumptions are presented about it such as: A bearing crater volcanic dome or ring dike. Accordingly, to distinguish the shape a number of geophysical (geo electric) profiles is done on the masses in various locations (internal and external parts). According to resulted data of electrical resistances of underneath layers, different receptivity was measured in the internal (300-600) and external (10-300) parts of the mass. Thus, by the analysis of electric waves cross speed compared with standard tables, In spite of ring shape, the mass has continued in the internal part under quaternary sediments (the maximum thickness of 15m). Therefore, this mass was a sub volcanic dome that alteration in the internal part caused increasing of its diameter.

Subject List : ring complex