New progress in the study of early Pre-Cambrian geology of central Yunnan Province

Stratigraphic sequence of Mesoproterozoic "Kunyang Group" in central Yunnan Province is an important basic geological problem of long controversy, and such a situation has restricted deployment of geological surveying work and exploration effect and also constrained further development of early Pre-Cambrian geological research in central Yunnan Province. Based on previous work, " Regional Geology of Yunnan"(The second edition, revised) and "1:50000 Erjie Sheet Regional Geological Survey", the authors put forward a series of significant new ideas concerning stratigraphic sequence, epoch of early Pre-Cambrian, records of important geological events, and co-evolution of early life and environment, by means of field substantial geological survey and zircon isotope dating. On the basis of these new ideas, the authors suggest some new tasks about early Pre-Cambrian geological research in central Yunnan Province.