Finite strain analysis of pebbles in the metatillite and phyllite shows that the deformation of the metatillite/phyllite zone is flattening to plane-strain dominated. Results of SPO analysis of the rigid plagioclase porphyroclasts in three perpendicular planes indicate monoclinic strain symmetry of the Zhangbaling schist and oblate geometry of the clast. Forward strain modeling of rigid clasts is performed based on the shape fabric of the clast population. Integrated results of finite strain modeling and finite strain analysis indicate that this midcrustal section experienced at least ∼18-36% thinning in the oblique convergence between North and South China blocks.
Bibliographical noteFunding Information:
This study was supported by the National Science Foundation grants EAR 0106953 and EAR 0126166 , and the National Science Foundation of China ( 41072071 ; 4117218 ). Authors give their sincerest thanks to Dr. Sarkarinejad for his detailed review and thorough editing. Special thanks are given to Dr. Xypolias for his critical comments and enlightening and constructive suggestions that improved the manuscript greatly.
- Crustal thinning
- Finite strain analysis
- Forward strain modeling
- Zhangbaling belt