Crustal thickness variation across the northeast Iran continental collision zone from teleseismic converted waves

2011 ◽  
Vol 16 (2) ◽  
pp. 253-260 ◽  
Author(s):  
K. Motaghi ◽  
M. Tatar ◽  
K. Priestley
Keyword(s):  
Continental Collision ◽  
Crustal Thickness ◽  
Thickness Variation ◽  
Collision Zone ◽  
Converted Waves ◽  
Northeast Iran

Processing of crust in the root of the Caledonian continental collision zone: the role of eclogitization

1997 ◽  
Vol 273 (1-2) ◽  
pp. 129-153 ◽  
Author(s):  
Håkon Austrheim ◽  
Muriel Erambert ◽  
Ane K. Engvik
Keyword(s):  
Continental Collision ◽  
Collision Zone

scholarly journals Insight into collision zone dynamics from topography: numerical modelling results and observations

2012 ◽  
Vol 4 (2) ◽  
pp. 889-917 ◽  
Author(s):  
A. D. Bottrill ◽  
J. van Hunen ◽  
M. B. Allen
Keyword(s):  
Sea Level ◽  
Dynamic Models ◽  
Continental Collision ◽  
Dynamic Topography ◽  
Surface Uplift ◽  
Collision Zone ◽  
Phase Surface ◽  
Clastic Sedimentary ◽  
Back Arc ◽  
Topographic Evolution

Abstract. Dynamic models of subduction and continental collision are used to predict dynamic topography changes on the overriding plate. The modelling results show a distinct evolution of topography on the overriding plate, during subduction, continental collision and slab break-off. A prominent topographic feature is a temporary (few Myrs) deepening in the area of the back arc-basin after initial collision. This collisional mantle dynamic basin (CMDB) is caused by slab steepening drawing material away from the base of the overriding plate. Also during this initial collision phase, surface uplift is predicted on the overriding plate between the suture zone and the CMDB, due to the subduction of buoyant continental material and its isostatic compensation. After slab detachment, redistribution of stresses and underplating of the overriding plate causes the uplift to spread further into the overriding plate. This topographic evolution fits the stratigraphy found on the overriding plate of the Arabia-Eurasia collision zone in Iran and south east Turkey. The sedimentary record from the overriding plate contains Upper Oligocene-Lower Miocene marine carbonates deposited between terrestrial clastic sedimentary rocks, in units such as the Qom Formation and its lateral equivalents. This stratigraphy shows that during the Late Oligocene-Early Miocene the surface of the overriding plate sank below sea level before rising back above sea level, without major compressional deformation recorded in the same area. This uplift and subsidence pattern correlates well with our modelled topography changes.

scholarly journals Insight into collision zone dynamics from topography: numerical modelling results and observations

Solid Earth ◽  
2012 ◽  
Vol 3 (2) ◽  
pp. 387-399 ◽  
Author(s):  
A. D. Bottrill ◽  
J. van Hunen ◽  
M. B. Allen
Keyword(s):  
Sea Level ◽  
Dynamic Models ◽  
Continental Collision ◽  
Dynamic Topography ◽  
Surface Uplift ◽  
Collision Zone ◽  
Phase Surface ◽  
Clastic Sedimentary ◽  
Topographic Evolution ◽  
Insight Into

Abstract. Dynamic models of subduction and continental collision are used to predict dynamic topography changes on the overriding plate. The modelling results show a distinct evolution of topography on the overriding plate, during subduction, continental collision and slab break-off. A prominent topographic feature is a temporary (few Myrs) basin on the overriding plate after initial collision. This "collisional mantle dynamic basin" (CMDB) is caused by slab steepening drawing, material away from the base of the overriding plate. Also, during this initial collision phase, surface uplift is predicted on the overriding plate between the suture zone and the CMDB, due to the subduction of buoyant continental material and its isostatic compensation. After slab detachment, redistribution of stresses and underplating of the overriding plate cause the uplift to spread further into the overriding plate. This topographic evolution fits the stratigraphy found on the overriding plate of the Arabia-Eurasia collision zone in Iran and south east Turkey. The sedimentary record from the overriding plate contains Upper Oligocene-Lower Miocene marine carbonates deposited between terrestrial clastic sedimentary rocks, in units such as the Qom Formation and its lateral equivalents. This stratigraphy shows that during the Late Oligocene–Early Miocene the surface of the overriding plate sank below sea level before rising back above sea level, without major compressional deformation recorded in the same area. Our modelled topography changes fit well with this observed uplift and subsidence.

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