论文部分内容阅读
大西洋的麻粒岩带是沿巴西海岸分布的一条宽阔岩带,从巴伊亚州(约10°S)到南里奥格朗德州(约31°S)。这个大陆麻粒岩带是代表由于有中和上元古活动带迭加而连续再生的主要太古宙脆弱带,由多次变质,构造迭加作用和结构重建作用,火成岩体的深熔作用和侵入作用导致其部分破坏。因此这条古老岩带是由几个不同特征的麻粒杂岩组成,正如下述。在巴伊亚州出现了在外亚马孙旋回(2000±200Ma)期间中再生
The Atlantic granulite belt is a wide belt of rock along the Brazilian coast from Bahia (about 10 ° S) to Rio Grande do Norte (about 31 ° S). This continental granulite belt is the main Archaean fragile belt that represents continuous regeneration due to the superimposition of the Mesozoic and Proterozoic activity belts. It consists of multiple metamorphism, tectonic superimposition and structural rebuilding, and the deep melting of igneous rocks and Intrusion caused part of its destruction. Therefore, this ancient rock belt is composed of several different characteristics of the granulite complex, as described below. In Bahia there was regeneration during a period of exodus Amazon (2000 ± 200 Ma)