莱州湾南岸地貌及第四系发育对区域构造响应

发布时间：2018-06-25 04:45

本文选题：河间地 + 地貌倾斜　；参考：《大地构造与成矿学》2016年06期

【摘要】：莱州湾南岸地貌第四系发育受控于气候、基准面及区域构造,沂沭断裂带的新近活动是该区域地貌第四纪发育的影响因素之一。本文通过地形分析、流域水文分析、历史地貌分析、第四系厚度与历史构造分析等方法,对该区域地貌第四系发育与断裂带关系进行了研究。研究表明:(1)研究区地势西高、东低,河流下切深度自西向东依次减小;典型河流河间地比率自西向东增大;分水岭向东迁移。(2)第四系西薄东厚,区域第四系厚度分布受断裂带控制。(3)沂沭断裂带控制了潍北组的区域分布,控制了区域第四纪沉降中心,影响了全新世中期最大海侵范围。第四纪沉降主轴与断裂带之间的几何关系表明沂沭断裂带在第四纪具有右行走滑性质,区域地貌第四纪特征为沂沭断裂带新构造活动提供了地貌第四纪方面的证据。
[Abstract]:The development of the Quaternary system on the southern coast of Laizhou Bay is controlled by climate, datum level and regional structure, and the recent activity of the Yishu fault zone is one of the factors influencing the development of the quaternary geomorphology in the region. In this paper, the relationship between the development of the Quaternary and the fault zone in the region is studied by means of terrain analysis, basin hydrological analysis, historical geomorphology analysis, Quaternary thickness and historical structure analysis and so on. The results are as follows: (1) the topography of the study area is high in the west and low in the east, and the depth of the river tangent decreases from west to east, the ratio of the typical rivers increases from west to east, the watershed migrates eastward. (2) the Quaternary is thick from west to east. The thickness distribution of the regional Quaternary system is controlled by the fault zone. (3) the Yishu fault zone controls the regional distribution of the Weibei formation, controls the regional Quaternary subsidence center, and affects the maximum transgression range in the middle Holocene. The geometric relationship between the main axis of Quaternary subsidence and the fault zone indicates that the Yishu fault zone was right-strike-slip in the Quaternary, and the regional geomorphologic Quaternary features provided evidence for the neotectonic activity of the Yishu fault zone in the Quaternary.
【作者单位】：鲁东大学资源与环境工程学院;
【基金】：山东省自然科学基金(ZR2013DL006)资助
【分类号】：P931;P548

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