【作者】 刘亢；

【导师】 田明中；

【作者基本信息】 中国地质大学（北京） ， 第四纪地质学， 2007， 硕士

【摘要】 城市直下型地震可能造成的重大伤亡和经济损失,昆明市活断层探测项目通过对昆明市活断层探测与地震危险性评价工作,了解昆明市及其周围活断层的空间分布、可能造成的危险性和危害性,并基于评价结果采取有针对性的防震减灾措施,提高昆明市的综合抗震设防能力,从而实现减轻城市地震灾害的目标。本文基于昆明市活断层探测项目,应用层序地层学方法对昆明盆地大量钻孔资料进行层序地层分层和数据处理,使用地理信息系统软件三维分析模块建立昆明盆地地下三维模型,并进行初步分析。主要取得了以下成果:1.在详勘阶段钻孔探测中,采取了大量的热释光和¹⁴C测年样品,最后选取了其中65个热释光样品进行测年,并得到比较可信的测年数据,进一步验证了该项目在初勘阶段所建立的第四纪地层划分方案,即海埂组为0-0.012Ma,更新统上部（官渡组）为0.012-0.128Ma,更新统中部（中营组）为0.128-0.78Ma,更新统下部（滇池组）为0.78-2.6Ma。2.通过搜集昆明地区400余个钻孔资料,经过筛选整理出340个钻孔资料,采用ArcGIS软件中三维模块,建立了昆明地区的地质模型,获得了盆地地下三维层序-构造格架。3.采用ArcGIS软件中三维分析模块,生成各个地层的坡度图。通过对比地表、Qh海埂组底部以及Qp3G官渡组底部坡度图,对昆明地区目标断裂都在几何形态方面进行了分段性研究,即F1（普渡河-西山断裂）分为三段,F2断裂为一段,F3（普吉-韩家村断裂）和F5（盘龙江断裂）断裂均分为南北两段,F6（黑龙潭-官渡断裂）分为三段。更多还原

【Abstract】 Earthquakes occurring directly beneath big cities may bring enormous casualty and enconomy loss. The item of surveying of subsurface active faults in Kunming basin gets a conclusion of spatial distribution and potential risks of active faults by surveying active faults in Kunming basin and seismic risk evaluation in quaternary. Based on the evaluation results, this study can get the method of the protection against earthquake and disaster reduction and achieve the target of alleviating the harm of urban earthquake.This study based on the item of surveying active faults in Kunming basin uses sequence stratigraphy method to establish a subsurface model for the Kunming basin with a great deal of borehole data. The main results of the thesis are summarized as below.1. In the course of Borehole Exploring, we get 65 more exacter TL data, and validate the method of Subdivision of Quaternary. The chronostratigraphy of Kunming Basin is divided into 4 age: The forming time of the Holocene corresponding( Haigeng Formation) is 0- 0.012Ma;that of the Upper-Pleistocene(Guandu Formation) is 0.012-0.128Ma; that of the Mid-Pleistocene (Zhongying Formation) is 0.128-0.78Ma; that of the Under-Pleistocene(Dianchi Formation) is 0.78-2.6Ma.2. This study uses more than 340 boreholes’data and 3D module of ArcGIS to establish a subsurface model for the Kunming basin and get a 3D sequence-structureframe work model of the basin.3. Using the 3D module of ArcGIS, this study get slope maps of all the stratum. And I research on the segmentation of target faults in Kunming basin. F1 (Pudu River-West Hill Fault) is divided into 3 segments, F2 is 1 segment, F3 (Puji-Hanjia village Fault) and F5 (Panlong River Fault) both are divided into 2 segments, and F6 (Heilongtan-Guandu Fault) is divided into 3 segments.更多还原