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Time limit of Jinning-Chengjiang movement
It is generally believed that the time limit of Jinning sports is 850Ma, and that of Chengjiang sports is 750 ~ 700 ma, which is the peak of sports. According to the study of stratigraphy and isotopic chronology, the age of Kunyang Group (Huili Group) belongs to Mesoproterozoic. The top floor is 1050Ma (Wu Maode, 1990) or 1002Ma (Yunnan Institute of Geology, 1980). The deformation and metamorphism of Kunyang Group and Huili Group mostly occurred in 900 ~ 800 ~ 750 Ma, and the emplacement of granite mostly occurred in 800 ~ 750 Ma. This shows that the Jinning movement started at the end of Mesoproterozoic (1000Ma) and reached about 800Ma, which ended the history of Mesoproterozoic marine deposits in this area and made it undergo deformation, metamorphism, magmatism and large-scale uplift, lasting about 200Ma.

Although there were a series of movements in Sichuan and Yunnan in Mesoproterozoic, for example, Dongchuan Movement (Hua Youren,1958; Chen Zhiliang et al.,1987; Yi Haitao, 1990), time limit 1400Ma,1100 ~1050 ma; Tang Fang Movement (Wu Maode, 1977), time limit1050ma; ; The time limit of full silver groove movement and triangle mouth movement is 65438±0000Ma, etc. There are great differences of opinion or limited evidence, so it is impossible to reach a unified opinion. Hu Yanji (1988) thinks that the Manyin 'gou movement is the Jinning movement; Pan et al. (1987) hold that the Manyingou movement is a prelude to the generalized Jinning movement, rather than an independent tectonic cycle. We think: Tang Fang Movement, Man Yin Gou Movement and maybe Sanfengkou Movement are the prologue of Jinning Movement; Its nature is uplift, with slight ups and downs.