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文中采用钻探技术对南口-孙河断裂带进行了试验探测研究,并通过层序地层学、岩性岩相分析、磁化率分析与年代测定等方法建立了钻孔联合剖面,进而研究了断层距今60ka以来的多期活动特征,得出断裂带的3个活跃期是60～47kaBP、36～28kaBP与16kaBP以来,其余时段为相对平静期。断裂带的平均垂直位错速率,距今60～37ka之间约为0.35mm/a,37～32ka之间为0mm/a,32～12ka之间为0.78mm/a,12ka以来为0.35mm/a。研究认为,与传统的岩性、沉积相分析方法相比,层序地层学方法在钻孔地层对比与隐伏断层活动分期研究中有一定的优势。
In this paper, drilling technology is used to test and study the Nankou-Sunhe fault zone, and a united drilling profile is established by means of sequence stratigraphy, lithology and lithofacies analysis, magnetic susceptibility analysis and dating, and then the relationship between fault distance Since the present 60ka multi-period activity characteristics, we can draw the conclusion that the three active periods of the fault zone are 60 ~ 47kaBP, 36 ~ 28kaBP and 16kaBP, and the rest periods are relative quiet period. The average vertical dislocation rate of the fault zone is about 0.35 mm / a between 60 and 37 ka, 0 mm / a between 37 and 32 ka, 0.78 mm / a between 32 and 12 ka, 0.35 mm / a. The study shows that, compared with the traditional methods of lithology and sedimentary facies analysis, the method of sequence stratigraphy has some advantages in the comparison of borehole strata and the staging of hidden faults.