Figure 3
Tectonic processes in the eastern SCB. All of the microblocks here are modified to the coincident direction and relative position for each stage of this process, based on the paleomagnetic data (www.scotese.com52). (a) Accretion between the ECAB and WCAB in the middle-late Neoproterozoic; (b) collision between the CAB and YGB in the late Neoproterozoic; (c) interaction among JNO, NCB and NLR in the early Mesozoic; (d) accretion between the SECB and ECAB in the late Mesozoic. 1: lower plate; 2: upper plate; 3: proposed regional boundaries; 4: inferred regional boundaries; 5: stress direction; 6: upwelling direction; 7: subduction (opposite obduction) direction. The WCAB subducted towards the ECAB before the middle Neoproterozoic, and the whole CAB then collided with the YGB. After Paleozoic sedimentation and tectonism, the NLB and JNO subducted northward in the Indosinian, and the suturing of the ECAB and SECB occurred under intracontinental extension of the SCB and compression from the Paleo-Pacific block.
