1 research outputs found
Lithospheric structure in Central Eurasia derived from elevation, geoid anomaly and thermal analysis
<p>We present new crustal and lithospheric thickness maps for Central Eurasia from the combination of elevation and geoid anomaly
data and thermal analysis. The results are strongly constrained by numerous previous data based on seismological and seismic
experiments, tomographic imaging and integrated geophysical studies. Our results indicate that high topography regions are
associated with crustal thickening that is at a maximum below the Zagros, Himalaya, Tien Shan and the Tibetan Plateau. The
stiffer continental blocks that remain undeformed within the continental collision areas are characterized by a slightly thickened
crust and flat topography. Lithospheric thickness and crustal thickness show different patterns that highlight an important
strain partitioning within the lithosphere. The Arabia–Eurasia collision zone is characterized by a thick lithosphere underneath
the Zagros belt, whereas a thin to non-existent lithospheric mantle is observed beneath the Iranian and Anatolian plateaus.
Conversely, the India–Eurasia collision zone is characterized by a very thick lithosphere below its southern part as a consequence
of the underplating of the cold and stiff Indian lithosphere. Our new model presents great improvements compared to previous
global models available for the region, and allows us to discuss major aspects related to the lithospheric structure and acting
geodynamic processes in Central Eurasia.
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