What drives the continued India-Asia convergence since the collision at 55 Ma?

• 来源期刊: 科学通报（英文版）
• 年，卷（期）: 2020,（3）
• 页码范围: 169-172
• 页数: 4页
• 语种: 英文

摘要

What may drive the India-Asia convergence has been puzzling and has in fact puzzled many.According to the theory of plate tectonics and the concept of Wilson Cycle,continental collision means the loss of seafloor subduction and thus the disappearance of slab pull for driving plate motion [1-3],yet the India-Asia convergence has continued to this day at a rate of～40 mm/a [4] since the collision ～55 million years ago [5].This apparent puzzle has made some to question the validity of the Wilson Cycle concept and to raise doubts about slab pull being the primary driving force for plate motion [1-3].Ridge push,which is well-understood as a secondary force,has thus been emphasized by some;the idea of mantle plumes as driving force has also been reinvoked;and subduction of the Indian mantle lithosphere itself has been claimed as being adequate to drive the India-Asia convergence [6].