Neoproterozoic granitoids along the Ailao Shan-Red River belt: Zircon U-Pb geochronology, Hf isotope analysis and tectonic implications

摘要

Highlights ? Proterozoic crystalline rocks are widely distributed along the ASRRB. ? The ASRRB lies between the South China and Indochina continental blocks. ? Neoproterozoic granitic magmatisms span from 799Ma to 724Ma along the ASRRB. ? The magmatisms are mainly of crustal origin with contributions from mantle sources. ? oceanic subduction beneath the Yangtze Block lasted from ca. 799 to 724Ma. 展开▼