发育于四川拉拉——通安地区基性岩体旁侧的角砾岩,是本区热液交代型铁矿的主要赋存地带。对这种角砾岩的成因,众说纷云,一直争论很大。根据目前国内外有关资料报导,角砾岩体在世界上是很普遍的现象,并且往往与许多有色金属的矿化密切伴生在一起。这些现象愈来愈引起许多地质工作者的重视,因此有必要对它的成因进行研究。 The breccia, which was developed beside the basic rock mass in Lala-Tong’an area, Sichuan, is the main reservoir of hydrothermal-hosted metamorphic iron ore in this area. The cause of such breccia, say numerous, has been controversial. According to the current domestic and foreign information reported, breccia bodies in the world is a very common phenomenon, and often with many non-ferrous mineralization closely linked. These phenomena are more and more aroused by many geologists, so it is necessary to study its causes.