Figure 2

Deep seismic profiles. Please see Fig. 1b for the locations of these profiles. (a) Original profile crossing the Minjiang fault zone with generalized interpretations of the strata. (b) Original profile crossing the Huya fault with generalized interpretations of the strata. (c) Interpreted profile crossing the Minjiang fault zone. The red lines show the location of the Minjiang fault zone at depth, and the arrows indicate the relative directions of motion. (d) Interpreted profile crossing the Huya fault zone. The Huya fault has been divided into two segments by the decoupled crust underlying the Min Shan. The deformation is consistent between the upper and lower crust within the Bikou block. The figure was drafted by X.X. using the CorelDRAW software package (http://www.coreldraw.com/en/product/graphic-design-software/).