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基金项目:国家自然科学基金项目(41372158)资助
作者单位
李甜,燕晓莹,解国爱,等 南京大学地球科学与工程学院 
摘要:
      研究区位于南京幕府山地区的劳山向斜,此向斜以三叠系青龙组为核部,两翼依次出露古生界地层,走向北东。根据向斜两翼地层产状,利用极射赤平投影方法得出该向斜的枢纽产状为30°∠11°,轴面产状为294°∠81°,主应力σ1、σ2、σ3的产状分别为115°∠9°、30°∠11°、247°∠75°,显示该向斜是在晚三叠世时受到北西—南东方向近水平挤压应力作用而形成,是向斜成山的构造负地形。劳山最高峰是向斜核部转折端,两翼依次出露的不同地层之间均为断层接触;劳山向斜两侧发育的断层倾向均与向斜核部向背,运动方向均向向斜核部逆冲,而且断层倾向与地层倾向相反。推测断层倾角上陡下缓,造成地层缺失和出露不完整。根据对其中1条断层的定量研究,得出该断层的运动量为62.94 m。研究成果对进一步研究宁镇山脉地区的褶皱构造形态、断裂构造的运动方式和运动量有重要意义。
关键词:断层  褶皱  极射赤平投影  劳山  南京幕府山
Abstract:
      The study area is located in the Laoshan syncline in the Mufushan area of Nanjing. With Triassic Qinglong Formation as its core in northeast strike, its two synclinal limbs develop Palaeozoic strata respectively. Based on the occurrences of strata in synclinal limbs, this paper draws the conclusion that the occurrence of synclinal hinge is 30°∠11°, that of the axial plane is 294°∠81°, and those of the major stresses σ1,  σ2, and σ3 are 115°∠9°, 30°∠11°and 247°∠75° respectively by using polar stereographic projection method. It shows that the syncline is formed by NW-SE extrusion of near horizontal direction. It is a syncline mountain due to inversion of relief. The highest peak of the Laoshan Mountain is the turning point of the synclinal core. The contact relationship between the different strata of the two limbs is mostly fault contact. Fault tendency of the two sides of Laoshan syncline is irreconcilable with that of its core. Their movement direction is contrary to that of the core. Fault tendency is also contrary to that of the strata. It is inferred that the tendency of fault top is steeper than that of the lower part, which caused part of the strata missing and its outcrop incomplete. According to the quantitative research of one fault, it is found that the fault movement is 62.94 m. The result of this study is of importance to the further research of the fold structure, forms and amount of movement of fault structure in the mountains of Ningzhen area. 
Keywords:fault  fold  polar stereographic projection  Laoshan Mountain  Mufushan area of Nanjing
李甜,燕晓莹,解国爱,等.南京幕府山地区地质构造特征及断层量化[J].地质学刊,2017,41(4):631-636