Kapp et al. (2000) suggested that the Qiangtang metamorphic belt consists of underplated blueschist-bearing melange and was exhumed by low-angle normal faults, and that both the underplating and the exhumation occurred during early Mesozoic southward subduction of oceanic lithosphere along the northern Jinsha suture. However, I question their field mapping in central Qiangtang and their interpretation for the origin of the blueschist-bearing melange, although I appreciate their endeavor in understanding the tectonics of this area, which has extremely difficult topography.

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1. It is generally accepted that the Qiangtang belt could define the Cathaysian-Gondwana divide within the Qiangtang block (e.g., Fan,...

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