Proto- to Paleo-Tethyan evolution of the eastern margin of Simao block

The Simao block, northern extension of Indochina block, was located along the Proto-Tethyan subduction zone in Early Paleozoic and subducted by the Paleo-Tethyan Ailaoshan ocean along its eastern margin in Permo-Triassic. The location of Simao block in the Proto-Tethyan paleogeography and the Permo-Triassic consumption process of the Ailaoshan ocean were unclear. Detrital zircons from Silurian to Triassic strata and the representative Xin'anzhai...