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作者曾以常密度模型重力反演指出杭州湾北西向深断裂的存在,后以多层变密度模型重力-地震联合反演进一步发现:该北西向构造带不仅是一中地壳低密层过渡带,而且是上地幔顶部结构过渡带,并与秦岭构造带相关联。本文通过地壳磁性层的反演和地震构造学研究对此提供了新的论据,同时发现郯庐断裂带向南止于此带;长江口-济州岛是北东向深部构造边界。杭州湾-秦岭深部构造带和郯庐带的交汇控制了华北强震区、华南弱震区和下扬子-南黄海中-弱地震活动区的一级分区,同时也是一级成矿区的边界。
The authors have used the gravity inversion of the normal density model to point out the northwesterly deep fault of Hangzhou Bay. Combined with the multi-layer densification model gravity-seismic joint inversion, the author further found that the NW structural zone is not only a middle-low crustal transition zone , But also the transitional zone of the upper mantle and is associated with the Qinling structural belt. In this paper, we provide new arguments for the study of the crustal magnetic layer inversion and seismic tectonics, and find that the Tan-Lu fault zone ends southward in this zone. The Changjiang Estuary-Jeju Island is the NE-trending deep tectonic boundary. The intersection of the Hangzhou Bay - Qinling deep tectonic belt and the Tanlu zone controls the first-level zoning of the strong earthquakes in North China, the weak earthquakes in South China and the mid-weak earthquakes in the Lower Yangtze-South Yellow Sea, and is also the boundary of the primary metallogenic zone.