Figure 2. Tectonic map for the area shown in Figure 1 along the Three Rivers in southeastern Tibet and its adjacent foreland to the northeast. The major tectonic elements are labeled. The extruded Indochina fragment lies between the Ailao Shan shear zone on the east and the Gaoligong shear zone on the west; the Chong Shan shear zone (CSSZ) lies between them. Some important fault lines are shown in red. Broad red zones are belts of mylonitic rocks discussed in the text.