As a traditional method for palaeoseismic studies, trenching can be combined with dating techniques to identify palaeoseismic events and the earthquake recurrence interval. However, when using trenches to study palaeoearthquakes, factors such as the active tectonic background of the earthquake‐caused structure, the lithology on both sides of the fault, the geomorphology location and type and the samples and methods for dating will affect the location of the trench. Thus, trenches should be carefully selected and used to identify the impact of ancient earthquakes. The results have substantial uncertainties and limitations. In recent years, scholars have made considerable progress in using other methods to reveal the palaeoseismic information of faults. Moreover, the history of fault activity may have been recorded in the lacustrine sediment adjacent to the fault. Hasuhai Lake is adjacent to the middle segment of the Daqingshan piedmont fault in Inner Mongolia. Since the Holocene, the region has experienced a temperate continental semi‐arid climate with little interference, and Hasuhai Lake and peripheral waters present weak hydrodynamic conditions that provide an ideal location for the study of palaeoseismic records in lacustrine sediments. Sediment samples and samples for dating were collected from three trenches excavated on the periphery of the Hasuhai Lake. Their variations in grain size and magnetic susceptibility revealed that wind and flowing water jointly produced the sedimentary conditions of Hasuhai sediments. The ¹⁴C dating results and variations in the grain size distribution, grain size components and magnetic susceptibility of sediments caused by seismic events obtained in this study were compared with those caused by a series of palaeoseismic events at the middle segment of the Daqingshan piedmont fault reported by previous studies using trenches, knickpoints and palaeosol records. The results identified seven palaeoseismic events recorded near Hasuhai Lake since 12,000 years. The combined use of lacustrine sediment variation characteristics and dating techniques is an effective method for studying palaeoseismic events.

中文翻译：

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湖相沉积物中的古地震记录-以内蒙古大青山山前断裂带和哈苏海湖为例

作为古地震研究的一种传统方法，可以将挖沟与测年技术结合起来，以识别古地震事件和地震复发间隔。然而，当使用海沟研究古地震时，诸如地震活动构造背景，断层两侧的岩性，地貌学的位置和类型以及测年的样品和方法等因素都会影响到地震的位置。沟。因此，应仔细选择沟渠，并用来识别古代地震的影响。结果具有很大的不确定性和局限性。近年来，学者们在使用其他方法揭示断层的古地震信息方面取得了长足的进步。此外，断层活动的历史可能已经记录在断层附近的湖相沉积物中。哈苏海湖毗邻内蒙古大青山山前断裂的中段。全新世以来，该地区经历了温带大陆性半干旱气候，几乎没有干扰，哈苏海湖和周边水域的水动力条件较弱，为研究湖相沉积物中的古地震记录提供了理想的位置。沉积物和定年样品是从哈苏海湖外围开挖的三个沟中收集的。它们的粒度和磁化率的变化表明，风和流动的水共同产生了哈苏海沉积物的沉积条件。的 哈苏海湖毗邻内蒙古大青山山前断裂的中段。全新世以来，该地区经历了温带大陆性半干旱气候，几乎没有干扰，哈苏海湖和周边水域的水动力条件较弱，为研究湖相沉积物中的古地震记录提供了理想的位置。沉积物和定年样品是从哈苏海湖外围开挖的三个沟中收集的。它们的粒度和磁化率的变化表明，风和流动的水共同产生了哈苏海沉积物的沉积条件。的 哈苏海湖毗邻内蒙古大青山山前断裂的中段。全新世以来，该地区经历了温带大陆性半干旱气候，几乎没有干扰，哈苏海湖和周边水域的水动力条件较弱，为研究湖相沉积物中的古地震记录提供了理想的位置。沉积物和定年样品是从哈苏海湖外围开挖的三个沟中收集的。它们的粒度和磁化率的变化表明，风和流动的水共同产生了哈苏海沉积物的沉积条件。的 哈苏海湖和外围水域的水动力条件较弱，为研究湖相沉积物中的古地震记录提供了理想的位置。沉积物和定年样品是从哈苏海湖外围开挖的三个沟中收集的。它们的粒度和磁化率的变化表明，风和流动的水共同产生了哈苏海沉积物的沉积条件。的 哈苏海湖和外围水域的水动力条件较弱，为研究湖相沉积物中的古地震记录提供了理想的位置。沉积物和定年样品是从哈苏海湖外围开挖的三个沟中收集的。它们的粒度和磁化率的变化表明，风和流动的水共同产生了哈苏海沉积物的沉积条件。的 它们的粒度和磁化率的变化表明，风和流动的水共同产生了哈苏海沉积物的沉积条件。的 它们的粒度和磁化率的变化表明，风和流动的水共同产生了哈苏海沉积物的沉积条件。的^将本研究中获得的地震事件引起的¹⁴ C测年结果以及沉积物的粒度分布，粒度成分和磁化率的变化与大庆山山前断裂中段一系列古地震事件引起的变化进行了比较。以前的研究使用沟渠，拐点和古土壤记录。结果确定了自12,000年以来在哈苏海附近记录的7次古地震事件。湖相沉积物变化特征和测年技术的结合使用是研究古地震事件的有效方法。