Metallogenic Belts of Southern Three Rivers Region,Southwest China:Distribution,Characteristics and Discussion
WANG Anjian1), CAO Dianhua1), GUAN Ye2), LIU Junlai3), LI Wenchang4)1) Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing, 100037;2) Institute of Geology, Chinese Academy of Geological Sciences, Beijing, 100037;3) China University of Geosciences, Beijing, 100083;4) Yunnan Geological Survey, Kunming, 650051
The geologic and tectonic evolution of the central and southern sections of the Three Rivers region is very complicated. The evolution of Paleo-Tethys and intracontinental convergent orogeny are accompanied by large-scale mineralization, and they differ greatly in terms of spatial scale. Therefore, the uniform classification of metallogenic belts could not reflect the regional mineralization rule of this area. This study divides the metallogenic belts based on Precambrian, Paleo-Tethys and intracontinental orogenic stages and proposes a new scheme for classification. Five large-scale metallogenic belts extending from the central section of Three Rivers region to Southeast Asia with a total length of more than a few hundred kilometers, are the Dali-Ailaoshan Cu-Ni-PGE metallogenic belt, Pb-Zn, Ag-Cu-Co, or Hg-Sb polymetallic metallogenic belts of Lanping-Simao basin, Jinshajiang-Ailaoshan Cu-Au metallogenic belt, the western and middle Sn metallogenic belts of Southeast Asia. In addition, a lot of geological problems about metallogenic belts are also discussed.