丽江-小金河断裂是川滇菱形块体内部重要的边界断裂，前人根据其断错地貌特征确定其为左旋走滑断层，并认为其左旋断错了SN向的丽江盆地。本文对丽江-小金河断裂丽江盆地隐伏段开展了浅层地震勘探与钻孔探测，通过地层岩性分析建立跨断层的钻孔联合剖面，揭示丽江-小金河断裂斜穿了丽江盆地，隐伏段整体形式为不对称正花状构造，表现为断展褶皱和逆冲断层，但主断层顶部表现为局部拉张，断错了晚第四纪地层。

The Lijiang-Xiaojinhe fault is an important tectonic boundary within the Chuan-dian diamond block. The previous studies suggested that the fault is left-lateral strike-slip supported by the faulted landform characteristics,and considered that the Lijiang Basin has been faulted. In this paper,shallow seismic exploration and borehole exploration are carried out in the basin-concealed section of the Lijiang-Xiaojinhe fault,and the stratigraphic composite section of the fault is established through the analysis of stratigraphic lithology. We found that the Lijiang-Xiaojinhe fault has crossed the Lijiang Basin. The overall form of the concealed section is an asymmetrical positive-flower structure,which is characterized by fault-propagation fold and thrust faults. However,the top of the main fault is characterized by local extension and the main fault had faulted late Quaternary strata.

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中国地震局地壳应力研究所基本科研业务专项（ZDJ2018-22、ZDJ2017-24）、城市活断层探测与地震危险性评价项目（丽江-小金河断裂（丽江盆地隐伏段）地质填图项目）与中国地震局地质研究所地震动力学国家重点实验室项目（LED2016A01）共同资助