鲁甸震区地处滇东北高山峡谷地区,地形地貌复杂,第四系极不发育,常规的活动地貌调查条件较差。近年来快速发展的无人机航测技术在地貌数据采集方面展现出了突出优势,通过将无人机航测技术应用于鲁甸震区一带活动构造研究中,结合野外地质调查和探槽选点工作,探讨了无人机航测技术在震区活动构造研究中的工作流程,基于无人机航测数据采集及解译,得到包谷垴—小河断裂光明村小垭口段2组密集分布的优势地表破裂; 沿昭通—鲁甸断裂发现水系、山脊同步右旋位错约70 m; 在新棚子村发现断层槽谷并布设探槽,成功揭露断层,以上应用显示了无人机航测技术在多山地区活动构造研究中的较好适用性。
The Ludian seismic area situated in the high-mountain gorge areas of northeast Yunnan. Due to the complex topography landforms and the poor development of quaternary system,the conventional investigation condition of active landforms are poor. The rapid development of UAV aerial survey technology in recent years has demonstrated outstanding advantages in the collection of geomorphological data. In this paper,the UAV aerial survey technology is applied to the research of active tectonics in the Ludian seismic area. Combined with the field investigation and trench site selection,we discussed the work flow with UAV aerial survey technology of remote sensing data collection in active tectonics in seismic area. Based on the data acquisition and image interpretation of the UAV aerial survey,two groups of densely distributed surface ruptures were obtained along the Baogunao-Xiaohe fault at Xiaoyakou in Guangmin village. Along the Zhaotong-Ludian fault,we found the dextral displacement of the gully and the ridge is about 70m and disclosed faults through trench work along the fault trough in Xinpengzi village based on the remote sensing image interpretation. It demonstrates better application effect of the UAV aerial survey technology on active tectonics research in mountainous area.
