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四川会理拉拉地区位于金沙江东岸,向东抵会理通安、会东、云南东川,向南达云南姜驿、元谋,同属川滇南北带中段与南岭东西带西延复合部位。 本区广泛出露一套元古界浅变质岩系,云南称为昆阳群、四川称为会理群,组成黄汲清先生所称“康滇地轴”中段基底岩系的一部分。 根据四川省地质局一区测队会理幅的报告与川地403队多年来的工作成果,结合我们74年来在黎溪、拉拉、毛姑坝及通安地区实地工作累积的资料,我们认为金沙江南北两侧昆阳群与会理群完全可以对比,属同一套地层(1、3、4)。会理地区元古界浅变质岩系的地层层序由新到老为:
The Sichuan Huili Lara area is located on the east bank of the Jinsha River, eastward to Huili Tong’an, Huidong, Yunnan Dongchuan, Nananda Yunnan Jiangyi and Yuanmou, and is also located in the middle part of the north-south Sichuan-Yunnan belt and the west extension of the Nanling East-West belt. A series of Proterozoic metamorphic rocks are extensively exposed in this area. Yunnan is called Kunyang Group. Sichuan is known as Hui Liqun and forms part of the basement rock series known as the “Kangdi-Dianxi Axis” by Mr. Huang Jiqing. According to the report of the team from the Geological Survey of the First District of Sichuan Province and the results of the work of the 403 team of Sichuan Province over the years, we have accumulated information on the field work in Liuxi, Lara, Mao’uba and Tong’an districts in the past 74 years That the north and south sides of the Jinsha River Kunyang group and the reasoning group can be compared, is the same set of strata (1,3,4). The stratigraphic sequence of the Proterozoic metamorphic rocks in Huili area is from new to old: