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封面故事：西藏日干配错断裂东段拉分凹陷（无人机拍摄）。日干配错断裂是青藏高原中部羌塘地体的一条NEE–SWW走向左行走滑断裂。该断裂具有显著的线性展布特征, 切割了第四纪地质地貌单元, 形成一系列典型的构造地貌。基于高精度卫星影像解译, 结合野外调查和测量, 刘富财等研究了日干配错断裂的构造地貌特征和晚第四纪滑动速率, 并分析了2020年7月23日西藏尼玛Mw6.4地震的发震构造, 认为日干配错断裂在调节青藏高原南北向挤压和东西向伸展过程中起着重要的作用。该研究为深入理解青藏高原中部近东西向伸展变形过程及强震活动机制提供了新的参考, 详见本期173-188页。（图片提供：潘家伟）
Cover Story：Pull-apart depression along the eastern segment of the Riganpei Co fault (RPCF), Tibet (Photo taken by UAV). The Riganpei Co fault is an ENE–WSW striking left-lateral strike-slip fault located in the Qiangtang terrane, central Tibet. The linear RPCF cuts through Quaternary geological and geomorphic units, forming typical fault-related tectonic and geomorphologic markers. LIU Fu-cai et al. determined the late Quaternary slip-rate and tec-tonic-geomorphologic characteristics of the RPCF based on the interpretation of high-resolu-tion satellite images and field surveys, and they proposed that it plays an important role in accommodating coeval E-W extension and N-S shortening in the interior of the Tibetan Plateau. In addition, they discussed the seismogenic fault of the Mw6.4 Nima earthquake that occurred on July 23, 2020. Their results provide a new refer-ence for understanding the E-W extensional de-formation process and mechanism of large earthquakes in central Tibet. For details, see pp. 173-188 of this issue. (Photo by PAN Jia-wei)
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