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1982年9月,我同沈其韩同志去巴西出席了太古—早元古地质演化和成矿作用国际讨论会,进行了野外地质旅行,阅读了一点有关巴西前寒武地质的文献。经过一些初略的整理,现将巴西前寒武纪地质作一概略介绍,供对这方面有兴趣的同行们参考。由于掌握材料较少,领会较浅,难免有不全面和不正确的地方,请批评指正。一、巴西大地构造位置和构造分区南美大陆的西部边缘,为安第斯山(Andean Chain)褶带,南角的东侧为巴塔哥尼亚地台(Patagonian Platform)。自安第斯山往东的广大地区为南美地台(South
In September 1982, with Comrade Shen Qihan and I went to Brazil for an international symposium on the Swire-Early Proterozoic geological evolution and metallogenesis. We conducted field geology tours and read some articles on the Precambrian geology in Brazil. After some preliminary finishing, a brief introduction to the Precambrian geology in Brazil will be made for reference to those who are interested in this area. As less material to grasp, to understand the shallow, it is inevitable that there is not comprehensive and incorrect place, please comment on criticism. First, the Brazilian tectonic position and tectonic division The western edge of the South American continent, the Andean Chain fold belt, the southern corner of the Patagonian Platform on the east. The vast area east of the Andes is the South American platform