2020年第1期目录
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封面故事：岷江上游沙湾晚第四纪湖相沉积中地震成因的球枕构造。通过软沉积物变形的野外精细观察和室内沉积学分析, 厘定了岷江上游沙湾湖相沉积中软沉积物变形的分布、类型和触发机制。依据高分辨率粒度和磁化率等微观环境指标分析, 建立了沙湾地区长时间尺度的古地震序列。结合14C和光释光测年, 探讨了沙湾晚第四纪古地震事件的年代、期次和地震活动性。本项研究为青藏高原东部区域的灾害类型和致灾机理提供了基础资料, 同时为构造活跃地区的古地震研究提供了新思路。详见本期23-36页。(图片提供：钟 宁)
Cover Story：A typical ball-and-pillow structure induced by an earthquake in the Late Quaternary Shawan lacustrine sediments in the upper reaches of the Minjiang River, eastern Tibetan Plateau. The distribution, type and triggering mechanism of the soft sediment deformation structure in the Shawan lacustrine sediments in the upper reaches of the Minjiang River were determined by field observation and indoor sedimentological analysis. Through the research on microscopic environmental indexes such as high resolution grain sizes and magnetic susceptibility, the long-term palaeoearthquake records in Shawan area were established. Combined with the 14C and OSL chronology of lacustrine sediments, the palaeoearthquake age, frequency and seismic activity during the Late Quaternary in Shawan were investigated. This study provides basic data for the disaster types and mechanism in eastern Tibetan Plateau, and provides a new train of thought for the study of paleoearthquakes in the region with active tectonics. For details, see pp. 23-36 of this issue. (Photo by ZHONG Ning)
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