Some thermomechanical aspects of the subduction of continental lithosphere

Article Abstract:

A subducting continental plate can break up and form a new plate interface within the middle or lower crust, resulting in the transfer of some continental material to the upper plate. Breakup is caused by buoyancy, plate contact friction, and decrease in crustal strength due to subduction. How deep continental crust can be subducted before it breaks up depends on its thickness, composition and temperature, the latter being a function of depth. Analysis suggests that breakup is likely to occur when the subducting plate's upper surface reaches 25-50 km.

Earth, Crust (Geology), Plate tectonics, Subduction zones (Geology), Subduction zones

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Geodynamics of the Tarim Basin and the Tian Shan in central Asia

Article Abstract:

The geodynamics of the Tarim Basin and the Tian Shan located in central Asia was investigated using a series of numerical experiments that draws together the area's lithospheric strength parameters. The approximation of of the deformation field in the India-Asia collision and the crustal thickness distributions were shown by the use of thin viscous sheet model representation. Results suggests that a strong Tarim Basin transfers strain to the Tian Shan which causes significant crustal thickening in the region.

Natural history, Central Asia, Formations (Geology), Geological formations, Tarim Basin

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