Writers : Arjomand Zade, R. Karimpour, M. H.; Mazaheri, S. A.; Santoz, J.; Medina. G.
Refference : 1st Symposium of Iranian Society of Economic Geology
Publishing Year : 1389

Abstract :

The tectonomagmatic and metallogenic setting of the Lut Block is still a matter of debate and several hypotheses have been put forward. One of the issues of that discussion is the importance of subduction processes to explain the geological features of the Lut Block. Despite some authors deny the influence of the operation of Benioff planes, most of the recent works consider that subduction of oceanic lithosphere had a major role in the tectonic evolution of this area.
Until now, two types of geodynamic models considering subduction have been presented: some authors propose that it occurred beneath the Afghan block, whilst others consider that oceanic lithosphere was dragged under the Lut block. New trace element and isotope geochemical data, obtained in the Oligocene intrusives from Dehsalm and Chah-shaljami areas, indicate that a subduction zone existed below the Lut block. On the other hand, structural evidence shows that subduction occurred beneath the Afghan block. In order to explain the most important tectonomagmatic and metallogenic characteristic of the Lut Block, a new hypothesis is presented in this work, considering a two sided asymmetric subduction beneath both Afghan and Lut blocks, with different rates of consumption of oceanic lithosphere.

Subject List : Tectonomagmatism