对加拿大萨德伯里撞击构造的考察及其启示

SURVEY TO SUDBURY IMPACT STRUCTURE AND ITS ENLIGHTENMENT

简介了近年来萨德伯里撞击构造及超大型铜镍硫化物矿床的研究现状和作者现场考察所得的认识。记述了萨德伯里的撞击构造、陨石撞击事件及其构造效应、岩浆杂岩（ＳＩＣ）和有关成因争论；叙述了该大陨石坑的变形和邻近格林威尔造山作用导致的ＮＷ—ＳＥ向缩短和剪切作用；还介绍了萨德伯里铜镍硫化物矿床撞击成矿假说；最后，特别提出在从事地球动力学和成矿作用动力学研究时。

The article describes the Sudbury Impact Structure, the Sudbury meteoritic impact event and its effects,the Sudbury Igneous Complex (SIC) and the controversy of its origin,the deformation of big crater and the NW-SE shortening and shearing as a result of the Grenville orogeny. Besides,the paper also introduces the hypothesis of impact mineralization of Sudbury Ni-Cu sulfide deposits. Finally,the authors especially put forward a proposal: during the study of earth dynamics and mineralizing dynamics,we should pay more attention to catastrophic event such as Sudbury meteoritic impact and mineralization of meteoritic impact.