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| 1 | 琼北老城剖面记录的马袅—铺前断裂西段晚更新世活动历史显示文摘马袅-铺前断裂为1605年海南琼山7.5级大地震的发震断裂之一,其活动历史研究对琼北地区地壳稳定性评价、防震减灾以及琼州海峡跨海大桥等重大工程建设有重要意义。地质地貌调查结果表明,马袅-铺前断裂西段由三条近东西向平行展布的北倾阶梯状正断层组成,并构成南北宽约2.5 km的断裂带。老城人工开挖南北宽达70 m的断裂带剖面揭露了该断裂晚更新世活动历史,道堂组光释光(OSL)年代学测试结果表明断裂在距今16~31 ka期间经历了两期活动:第一期表现为南、北相向倾斜的正断活动,累计垂直位移3.3 m;第二期为南倾的正断活动,活动强度较大。马袅-铺前断裂错断不同时代地层的位移量表明该断裂自上新世以来开始活动,第四纪活动强烈,现今仍是琼北控制地震活动的重要断裂。 | 李薇 贾丽云 胡道功 张绪教 夏蒙蒙 蔺文杰 袁悦 | 2019 | 现代地质2019，33，5： | 5 |
| 2 | Holocene slip rate and paleoearthquake records of the Salt Lake segment of the Northern Zhongtiaoshan Fault, Shanxi Province显示文摘The Northern Zhongtiaoshan Fault is a major deep fault at the southern margin of the Yuncheng Basin. There have been few studies on the fault, and the historical earthquakes are few and weak. However, the intensity of activity on the fault should never be underestimated. Through interpretations of aerial images, topography measurements and excavation of trenches, this paper studied the fault distribution, the surface deformation and the activity of the normal fault south of Salt Lake near the city of Yuncheng. By tracing faults in the three trenches, it was found that there had been at least three large paleoseismic events, at 1–3.5, 3.6–4.4 and 7.4–8.8 ka BP. Employing 14 C dating, we determined the same gravel layers in the uplifted side and downthrown side. Making differential Global Positioning System measurements of the vertical difference and topographic profile, we obtained the mean slip rate of the Northern Zhongtiaoshan Fault since 24.7 ka BP(0.75±0.05 mm/a). Using the results of relevant studies, we calculated the possible vertical fault displacement of one earthquake(2.35 m) and obtained the recurrence interval of characteristic earthquakes as 2940–3360 a after dividing the displacement by the mean slip rate. | SI SuPei LI YouLi Lü ShengHua WANG YiRan | 2014 | Science China Earth Sciences2014，57，9： | 2 |
| 3 | 河套盆地西南缘巴音恩格尔活动断裂的发现及地质意义显示文摘河套盆地西南缘活动断裂的研究对环鄂尔多斯断陷盆地边缘构造演化规律的认识和黄河三盛公水利枢纽地震安全性评价有着重要意义。最新地表调查发现的巴音恩格尔断裂位于内蒙古磴口县东部,长约15 km,走向北东东。断层陡坎、水系错动等构造地貌显示,巴音恩格尔断裂是以正断为主兼具右旋走滑分量的张扭性断层。通过野外地质调查、浅层面波地震以及光释光(OSL)测年等方法,查明了巴音恩格尔断裂的运动学特征及活动历史。结果显示晚第四纪以来巴音恩格尔断裂右旋错断了数条黄河支流水系,平均水平位错量179 m。断裂在(118.98±20.96)~(76.97±13.5)ka的右旋正走滑运动错断了鄂尔多斯高原夷平面和黄河高阶地,形成长2.5 km的断层陡坎;断裂最新一期活动年代为(38.20±2.3)~30 ka,以垂直位移为主,断裂错断的最新地貌是黄河支流T3阶地,平均垂直位移速率0.337 mm/a。研究表明,巴音恩格尔断裂活动造成鄂尔多斯高原夷平面渐新统乌兰布拉格组大面积出露,并主导了河套盆地西南缘黄河支流T3阶地的快速下切,在区域地貌的演化过程中扮演着重要角色。 | 李成路 张绪教 武法东 叶培盛 卢晶 | 2023 | 现代地质2023，37，2： | 0 |
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