江孜床得白垩纪大洋红层的古地磁学:洋中俯冲-消减系统的证据

摘要

In the northern Tethys Himalaya,sporadically distributed oceanic red beds(Chuangde Formation)have been described.The sequence was interpreted to be firstly deposited in the outer continental shelf and upper slope,and later slumped into deep basin.Based on this model,and paleomagnetic data of shallow water deposits from the southern Tethys Himalaya,the CORBs were derived from the northern tip of the passive margin of the greater India.If so,the CORBs would provide more accurate record of the northern extent of the greater India,which is an important parameter for estimating the initial time of India-Asia continental collision and the amount of crustal shortening.