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研究区地质构造复杂,断裂发育,安宁河、金箐等断裂带第四纪以来强烈活动,并且成为安宁河地震带的发震构造。因此,在工程建设中迫切需要论证地壳稳定性和研究地震活动性。断裂活动年代是分析这两个问题的基础。我们对含淤泥的冲积层做了C~(14)年龄测试,对典型第四纪断层进行了野外调查,在此基础上完成本文。 C~(14)样品采样地点及编号见图1。
In the study area, the geological structure is complicated and the fault developed. Since the Quaternary of the Anninghe River and Jinliu fault zone, the tectonic activity has been intense and became the seismogenic structure of the Anninghe seismic zone. Therefore, it is urgently necessary to demonstrate the crustal stability and study the seismicity in the construction of the project. The age of fault activity is the basis for analyzing these two issues. We have done the C ~ (14) age test on silt-bearing alluvium, and conducted a field survey of typical Quaternary faults. Based on this, we completed this paper. C ~ (14) sample sampling locations and numbers shown in Figure 1.