摘要:The Sanjiang-Indochina region is one hot key area to study the evolutionof Tethys, and a lot of interesting topics have been excellently carried out by geologists from all over the world. One of the most important tasks for the scientist is to figure out the time and space evolution of the Tethys by tectonic methods, The major ophiolite belts crossing the Southem Sanjiang area and the Indo-China peninsula have been carefully studied in the past three decades, such as ophiolite slabs along the Jinshajiang-Ailaoshan-Song Ma , Lancangjiang,Changning-Qhiang Mai-Chanthaburi-Bentong-Rau,Luang Prabang-Uttaradit, Bangong Co -Nujiang, Naga-Arakan separately.