Authors
Konstanze Stübner, Lothar Ratschbacher, Daniel Rutte, Klaus Stanek, Vladislav Minaev, Maria Wiesinger, Richard Gloaguen, Project TIPAGE members
Publication date
2013/7
Journal
Tectonics
Volume
32
Issue
4
Pages
948-979
Description
Cenozoic gneiss domes comprise one third of the surface exposure of the Pamir and provide a window into the deep crustal processes of the India‐Asia collision. The largest of these are the doubly vergent, composite Shakhdara‐Alichur domes of the southwestern Pamir, Tajikistan, and Afghanistan; they are separated by a low‐strain horst. Top‐to‐SSE, noncoaxial pervasive flow over the up to 4 km thick South Pamir shear zone exhumed crust from 30–40 km depth in the ~250 × 80 km Shakhdara dome; the top‐to‐NNE Alichur shear zone exposed upper crustal rocks in the ~125 × 25 km Alichur dome. The Gunt shear zone bounds the Shakhdara dome in the north and records alternations of normal shear and dextral transpression; it contributed little to bulk exhumation. Footwall exhumation along two low‐angle, normal‐sense detachments resulted in up to 90 km syn‐orogenic ~N‐S extension. Extension in the …
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