New Progress in Paleoearthquake Studies of the East Sertengshan Piedmont Fault, Inner Mongolia, China
New Progress in Paleoearthquake Studies of the East Sertengshan Piedmont Fault, Inner Mongolia, China
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内蒙古色尔腾山东前断裂古地震研究新进展
DOI：
10.1007/s12583-017-0937-z
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发表时间：
2018-04
影响因子：
3.3
通讯作者：
Zhang Hao
中科院分区：
文献类型：
--
作者：
He Zhongtai;Ma Baoqi;Long Jianyu;Wang Jinyan;Zhang Hao
色尔腾山皮埃蒙特断裂东段自全新世以来发生了较大的活动。30 ka BP以来，沿该断裂沿着发生了多次古地震事件。通过挖掘新的海沟并将其结果与以前的研究结果相结合，古地震研究取得了进展。综合分析表明，自30 kaBP以来，阔勒不隆段先后发生了6次古地震事件：19.01- 37.56kaBP、18.73kaBP、15.03- 15.86kaBP、10.96kaBP、5.77- 6.48kaBP和2.32kaBP。分析还表明，大佘台段自30 kaBP以来共发生了6次古地震事件，依次为29.07、19.12-28.23、13.92-15.22、9.38-9.83、6.08-8.36和3.59kaBP。结果表明，沿两段均发生了沿着的准周期性递归，平均递归间隔约为4000 a。两个段之间的6个事件的一致时间表明，段可能符合两个段之间的级联破裂模型。据大量中国历史文献记载，阔勒不隆段最近的一次地震是公元前7年11月11日发生的历史性8.0级地震。
The two eastern segments of the Sertengshan piedmont fault have moved considerably since the Holocene. Several paleoseismic events have occurred along the fault since 30 ka BP. Paleoearthquake studies have been advanced by digging new trenches and combining the results with the findings of previous studies. Comprehensive analyses of the trenches revealed that 6 paleoseismic events have occurred on the Kuoluebulong segment since approximately 30 ka BP within the following successive time periods: 19.01–37.56, 18.73, 15.03–15.86, 10.96, 5.77–6.48, and 2.32 ka BP. The analyses also revealed that 6 paleoseismic events have occurred on the Dashetai segment since approximately 30 ka BP, and the successive occurrence times are 29.07, 19.12–28.23, 13.92–15.22, 9.38–9.83, 6.08–8.36, and 3.59 ka BP. The results indicate that quasi-periodic recurrences occurred along the two segments with an approximate 4 000 a mean recurrence interval. The consistent timing of the 6 events between the two segments indicates that the segments might conform to the cascade rupturing model between the two segments. As recorded by a large number of Chinese historical texts, the latest event on the Kuoluebulong segment is the historicalM8.0 earthquake occurred on November 11, 7 BC.
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