国内震积岩研究现状

地震是一种灾害性的地质事件。震积岩是在地层中具有古地震事件纪录的一类岩石的总称。对其研究可为地壳构造演化提供动力学解释。在地震过程中,震积作用可以形成特殊的标志性特征:如震动液化泥晶脉;微褶皱;层内阶梯状断层;自碎角砾岩(震塌岩);液化均一层等。本文综述了国内学者建立的几种陆相和海相震积岩序列:如碳酸盐岩振动液化地震序列(海相序列);大陆边缘震积岩序列;萨布哈震积岩序列(海陆过渡带序列);陆相碎屑岩地震液化序列(陆相序列)。同时,结合国内学者的研究成果,建立了由震积岩、海啸岩和震浊积岩组成的四种地震沉积组合;并指出了震积岩在构造演化解释、石油储层地质及全球古地震节律方面的研究意义。

STATUS QUO OF RESEARCH ON SEISMITES IN CHINA

Earthquake is a disaster event in the Earth crust.As a kind of catastrophic event rocks,seismites are rocks as archives of ancient earthquake activities,which can supply the dynamics explanation for the crust evolution,the global seismitc rhythm and seismites themselves were a kind of potential reservoir.There are many special structures which were generated by ancient earthquake recorded in the seismites,such as escaped structure of wicrite veins and liquefied deformation formed in the period of seismic liquefaction,microfold,graded fault,autoclast breccia,and homogeneied beds.The paper reviewed the seismic sequences about the marine stratum and continental stratum: the vibrational liquefaction sequence in carbornate rocks,seismite sequence in continental margin,sabkha seismites sequence and the autochthonous seismic liquefaction sequence in clastic rock.Four seism-deposits consist of autochthonous seismites,tsunamite and seismoturbidites.