【摘要】 随着野外观测数据的累积和地震成像技术的发展，对地球内部结构的探测范围越来越大，精度越来越高.利用新的技术手段获得更多的观测数据，不仅填补了研究区观测数据的空白，还有助于提高地下结构的探测精度.利用光纤地震仪耐极端环境和易于布设等优势，本研究使用自主研发的阵列式光纤地震仪在西藏易贡湖地区进行野外试验，首次获得了青藏高原地区主动源和背景噪声的光纤地震数据(包含一条水下测线的数据).利用背景噪声成像手段得到了易贡湖岸近地表S波速度结构，但未获得湖底的速度结构.经分析认为，湖水的流动对架设于湖底的探头造成了干扰.本次试验初步验证了阵列式光纤地震仪在极端野外环境中(尤其是水下)进行数据采集的可行性，为未来在极端环境下的数据采集提供了新思路.更多还原

【Abstract】 Due to the accumulation of observational data and the development of seismic tomography, our detection range of the internal structure of the Earth becomes larger, and the detection accuracy becomes higher. Applying new technologies to increase the amount of seismic observational data not only fills in the gaps of data but also further improves the detection accuracy of underground structures. Based on the development of fiber-optic sensing technology, fiber-optic seismometers have attracted more attention because they can be easily deployed in the field and can withstand extremely harsh environments. In this study, a field experiment using a self-developed fiber seismometer has been conducted in the Yigong Lake, which is located in the southeastern Tibetan Plateau. For the first time, fiber-optic data of the active source and ambient noise in the Tibetan Plateau were obtained, including the data from 8 fiber seismometers deployed at the bottom of the lake. Adopting the ambient noise tomography, near-surface S-wave velocity structure of the riparian was obtained, but the velocity structure beneath the Yigong Lake cannot be resolved at present. Our preliminary analysis is that data from the fiber seismometers under the lake were contaminated by the flowing noise of the lake water. This test verifies the feasibility of using these self-developed instruments for collecting data in extremely harsh environments, especially for collecting data in the water, and it provides new ideas for future data collection in such harsh environments.更多还原