Beiba granite body

There are many granite bodies exposed in the North Dam, but the scale is not large. See Table 4-2-89 for the results of Sm-Nd age isotope analysis of Nanzhengxihe (Xihe rock mass), Beibachapanchi (Tiechuanshan rock mass) and Baxi granodiorite. The tDM range of rock nd mode age is 1338 ~ 1799Ma, and from north to south, that is, Xihe to Baxi, the age value of rock Nd mode increases.

Table 4-2-89 Sm-Nd Age Isotope Analysis Results of Beiba Granite