撞击构造的特征及对贵州息烽县环形构造的成因解释

摘要

Impact structure is a kind of structural features,by the quick impact and shock in the process between meteorolite or comet-nucleus-like matter and planets.Impact process plays a vital role in the evolution and the surface-reshaping of planets in the solar system.Generally speaking,morphology and shock metamorphic rock can confirm impact structures on earth.There is almost no confirmed impact structures in China so far.Comparative research is carried on the impact-structure-like ring structure in Xifeng,Guizhou Province.Based on the study of present datum,field measuring and analysis of the samples, not any shock metamorphism is found in the samples.It is concluded that the ring structure is not an impact structure,but an old basin-like syncline changed into a swirl structure after several periods of tectonism.%对行星的撞击构造特征进行了总结.地球上的撞击构造,一般通过地貌以及冲击变质产生的岩石和矿物来确认.对贵州省息烽县境内的疑似撞击构造的环形构造进行了比较研究,通过对已有地质资料的详细调研、实地仔细的勘测和采样以及对样品的岩相学分析,并未观察到冲击变质特征,因此认为此处环形构造并非撞击成因,而是古老的盆状向斜经历了多期的构造作用形成的涡旋构造.