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| Main Achievements in Regional Geological and Mineral Prospective Survey of 1∶50 000 in Southern Beitinggong of Gaize County, Tibet |
| MA De-sheng1,2, XIONG Xing-guo2, WU Tao2, LI Yue-sen2. |
1.Resources Institute of China University of Geosciences, Wuhan, Hubei 430074, China;
2.Guizhou Geologic Survey, Guiyang, Guizhou 550005, China |
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Abstract The regional geological and mineral prospective survey project of 1∶50 000 in southern Beitinggong of Gaize County, Tibet has achieved main achievements as follows: ① A new stratigraphic unit, the Upper Triassic Galanong Formation, was identified, and the Upper Jurassic Karinuo Formation was redefined according to evidences of paleontological fossils. ② The U-Pb age of zircons from the diorite was (120±0.7) Ma, and the age from Lower Cretaceous Meiriqiecuo Formation was (121.9±1.6) Ma, which suggested that the Early Cretaceous was the most important period of volcanic activities in the survey area, and the volcanic activities were quite close with the subduction of Bangongco-Nujiang ocean.
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Received: 02 February 2015
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2015, Vol. 2 
