Tectono-stratigraphic evidence for the opening and closure of the Neotethys Ocean in the southern Sanandaj-Sirjan zone, Iran

2018 ◽  
Author(s):  
Mohammad Reza Sheikholeslami
Keyword(s):  
Neotethys Ocean ◽  
Sanandaj Sirjan Zone

The Late Jurassic Panjeh submarine volcano in the northern Sanandaj-Sirjan Zone, northwest Iran: Mantle plume or active margin?

Lithos ◽  
2018 ◽  
Vol 308-309 ◽  
pp. 364-380 ◽  
Author(s):  
Hossein Azizi ◽  
Federico Lucci ◽  
Robert J. Stern ◽  
Shima Hasannejad ◽  
Yoshihiro Asahara
Keyword(s):  
Mantle Plume ◽  
Late Jurassic ◽  
Submarine Volcano ◽  
Active Margin ◽  
Sanandaj Sirjan Zone ◽  
Northwest Iran

Opening and closure of Iranian back-arc basins: A seismic tomography view

2021 ◽  
Author(s):  
Nalan Lom ◽  
Abdul Qayyum ◽  
Derya Gürer ◽  
Douwe G. van der Meer ◽  
Wim Spakman ◽  
...  
Keyword(s):  
Seismic Tomography ◽  
Subduction Zones ◽  
Three Dimensional ◽  
Plate Motion ◽  
Limited Information ◽  
Three Dimensional Model ◽  
Slab Geometry ◽  
Novel Approach ◽  
Sanandaj Sirjan Zone ◽  
Back Arc

<p>Iran is a mosaic of continental blocks that are surrounded by Tethyan oceanic relics. Remnants of these oceanic rock assemblages are exposed around the Central Iranian Microcontinent (CIM), discretely along the Sanandaj-Sirjan Zone and in Jaz-Murian. The ophiolite belts surrounding the CIM are mainly assumed to represent narrow back-arc basins that opened in Cretaceous and closed before the Eocene. Although these ophiolites are exposed as small pieces on continental crust today, they represent oceans wide enough to form supra-subduction ophiolites and arc-related magmatic rocks which suggest that their palaeogeographic width was at least some hundreds of kilometers. Current models for the palaeogeographic dimension, opening and closure of these basins are highly schematic. They usually seem plausible in two-dimensional reconstructions, however a single three-dimensional model explaining whole Iran and its surrounding regions has not been fully accomplished.  This is mostly because while the geological record provides constraints on the origin and ages of the subducted ocean floor, it provides limited information about onset and cessation of the subduction and almost no constraints on the dimension of these oceans and the subduction zones that consumed them.</p><p>In this study, we follow a novel approach in estimating the dimension and evolution of these back-arc basin by using seismic tomography. Seismic tomography has revealed that we can image and trace subducted lithosphere relics. Imaged mantle structure is now being used to link sinking slabs with sutures and to define shape of a slab. Systematic comparison of regions where the timing of subduction is reasonably well constrained by geological data showed that slabs sink gradually through the mantle at rates more or less the same. This perspective enabled us to study slab shape as a function of absolute trench motion. While mantle stationary trenches tend to create steep slabs or slab walls, the flat-lying segments are formed where the overlying trenches are mobile relative to the mantle, normal facing during roll-back, overturned during slab advance.  Under the assumption of vertical sinking after break-off, it is also possible to locate the palaeo-trenches.  When combined with absolute plate motion reconstructions, tomographically determined volume and size of the subducted lithosphere can also be used to estimate the size/width of the prehistoric oceans. To this end, we build on and further develop concepts that relate absolute trench motion during subduction to modern slab geometry to evaluate the possible range of dimensions associated with opening and closure of the Iranian back-arc basins.</p>

scholarly journals Petrology, geothermobarometry, and P-T path of spinel-bearing symplectite migmatites from the Simin area, Hamedan, Sanandaj-Sirjan Zone, Iran

2019 ◽  
Vol 28 (2) ◽  
pp. 275-298
Author(s):  
Ali-Akbar BAHARIFAR ◽  
Donna L. WHITNEY ◽  
Kwan-Nang PANG ◽  
Sun-Lin CHUNG ◽  
Yoshiyuki IIZUKA
Keyword(s):  
Sanandaj Sirjan Zone ◽  
T Path

Diachronous demise of the Neotethys Ocean as a driver for non-cylindrical orogenesis in Anatolia

2019 ◽  
Vol 760 ◽  
pp. 95-106 ◽  
Author(s):  
Derya Gürer ◽  
Douwe J.J. van Hinsbergen
Keyword(s):  
Neotethys Ocean

Petrography and Mineral Chemistry of the Boroujerd Pluton (Sanandaj-Sirjan Zone, Western Iran)

2009 ◽  
Vol 9 (5) ◽  
pp. 843-853 ◽  
Author(s):  
A. Ahmadi Khalaji ◽  
Z. Tahmasbi ◽  
R. Zarei Sahamieh
Keyword(s):  
Mineral Chemistry ◽  
Western Iran ◽  
Sanandaj Sirjan Zone

Petrography and Geochemistry Characteristic of Enclaves in the Astaneh Pluton (Sanandaj-Sirjan Zone, Western Iran)

2008 ◽  
Vol 8 (23) ◽  
pp. 4251-4262 ◽  
Author(s):  
Z. Tahmasbi ◽  
M. Khalili ◽  
A. Castro ◽  
A. Ahmadi
Keyword(s):  
Western Iran ◽  
Sanandaj Sirjan Zone

The Barika gold-bearing Kuroko-type volcanogenic massive sulfide (VMS) deposit, Sanandaj-Sirjan zone, Iran

2019 ◽  
Vol 113 ◽  
pp. 103081 ◽  
Author(s):  
Hossein Ali Tajeddin ◽  
Ebrahim Rastad ◽  
Abdolmajid Yaghoubpour ◽  
Sajjad Maghfouri ◽  
Jan M. Peter ◽  
...  
Keyword(s):  
Massive Sulfide ◽  
Volcanogenic Massive Sulfide ◽  
Sanandaj Sirjan Zone ◽  
Gold Bearing
Sign in / Sign up

Export Citation Format

Share Document