Abstract: The study fault,discovered by aeromagnetic measurement,is the largest in eastern China.There has been some argument about how the fault extends to the north.Aeromagnetic and gravitational data show that the fault goes through Bohai,Anshan and Shenyang,to the Yilan-Yitong fault straight away.The magnetic field in depth shows that the northern segment of the fault is very different from the intermediate one as the fault passes by Anshan;the intermediate,for example,goes down to the very depth,on the both sides of which are different characterized basements which are boundary planes between the crustal structures with different substances;the northern does not extend so deeply as does the intermediate,making little sense to controlling of composition of substance.It is inferred from available data that the age for the generation of the northern segment of the main fault corresponds to Indosinian Period and the magmatism in this area is governed by the faults trending northwest.And the intermediate segment may have been formed in the late Archeozoic-early Proterozoic time.

摘要： 利用东北地区航磁资料的新近编图和数据处理结果,结合重力和地质资料,本文探讨了郯庐断裂带的北延和依兰-伊通等东北南部主要断裂的关系。在晚太古代至早元古代郯庐断裂形成时,它向北延伸过渤海就止于鞍山,为另一东西向断裂所截。郯庐断裂由于后期的活动才使它越过东西向断裂继续向北伸展,形成了依兰-伊通断裂。依兰-伊通断裂切割地壳的深度和对两侧基底的控制作用都不如郯庐断裂中段强烈。