QUATERNARY ACTIVE CHARACTERISTICS OF THE LIUMUGAO FAULT IN THE NORTHERN SEGMENT OF THE NIUSHOUSHAN-LUOSHAN FAULT
-
摘要:
牛首山-罗山断裂带是青藏高原东北缘弧形断裂系最外缘断裂带，自南向北由固原断裂、罗山东麓断裂、牛首山断裂及三关口断裂组成。通过遥感解译、野外调查及探槽揭露等方法对牛首山断裂北段柳木高断裂第四纪几何学、运动学特征进行了研究，并通过断层截切地层关系及年代学测试，限定了该断裂第四纪演化过程及全新世的地震事件。研究结果表明，柳木高断裂上新世至晚更新世自南西向北东逆冲，晚更新世至全新世左行走滑逆冲，表现为正花状构造，而全新世则发生了正倾滑运动。全新世期间，1690±30 yr BP（公元320-415）之后发生了一次古地震事件，推测柳木高断裂可能是公元876年青铜峡南6.5级地震的发震断裂。柳木高断裂第四纪早期活动特征与固原断裂、罗山东麓断裂及牛首山断裂一致，是青藏高原北东向持续扩展引起的，而全新世的正倾滑运动可能与银川地堑的伸展作用有关。
Abstract:The Niushoushan-Luoshan fault is located in the northeastern margin of the arcuate structure zone in the northeastern Tibetan Plateau, consisting of Guyuan, Eastern Luoshan, Niushoushan and Sanguankou faults from south to north. In this study, we defined the geometry and kinematics, and evolution of the Liumugao fault, which is the northern segment of the Niushoushan fault, during the Quaternary earthquakes through remote sensing interpretations, field observations and trench investigations, and bracketed the occurrence of Holocene earthquakes according to the analyses of cut-off relationship and age dating. We concluded that, the fault was dominated by NE-directed thrusting during Pliocene to late Pleistocene, followed by sinistrallateral torsional movement during late Pleistocene to pre-Holocene, which presented as positive flower structure, and normal faulting during Holocene. And the paleo-earthquake occurred after 1690±30 BP (Cal AD 320~415). The Liumugao fault might be the seismogenic fault of the Mw 6.5 south Qingtongxia earthquake in A.D. 876.The kinematic characteristic of Liumugao fault during Pliocene to late Pleistocene is consistent with the Guyuan, Eastern Luoshan and Niushoushan faults, which might result from the ongoing northeastward movement of the Tibetan Plateau. The Holocene normal faulting might be controlled by the extension of Yinchuan graben.
-
-
[1] Deng Q, Sung F, Zhu S, et al. Active faulting and tectonics of the Ningxia-Hui autonomous region, China[J]. Journal of Geophysical Research. 1984, 89(B6):4427~4445. doi: 10.1029/JB089iB06p04427
[2] 邓启东.中国活动构造研究[J].地质论评, 1996, 42(4):295~299. http://www.cnki.com.cn/Article/CJFDTOTAL-DZLP200202008.htm
DENG Qi-dong.Active tectonics in china[J]. Geological Review[J], 1996, 42(4):295~299. http://www.cnki.com.cn/Article/CJFDTOTAL-DZLP200202008.htm
[3] 陈虹, 胡健民, 公王斌, 等.青藏高原东北缘牛首山-罗山断裂带新生代构造变形与演化[J].地学前缘, 2013, 20(4):18~35. http://www.cnki.com.cn/Article/CJFDTOTAL-DXQY201304004.htm
CHEN Hong, HU Jian-min, GONG Wang-bin, et al. Cenozoic deformation and evolution of the NiuShou Shan-Luo Shan fault zone in the northeast margin of the Tibet Plateau[J]. Earth Science Frontiers, 2013, 20(4):018~035. http://www.cnki.com.cn/Article/CJFDTOTAL-DXQY201304004.htm
[4] Zhang W, Jiao D, Zhang P, et al. Displacement along the Haiyuan fault associated with the great 1920 Haiyuan, China, earthquake[J]. Bulletin of the Seismological Society of America, 1987, 77:117~131.
[5] 国家地震局地质研究所, 宁夏回族自治区地震局.海原活动断裂带[M].北京:地震出版社, 1990:1~286.
GeologicalResearch Institute of the State Seismological Bureau, The Ningxia Region Seismological Bureau. HaiyuanActive Fault Zone[M]. Beijing:Earthquake Publishing House, 1990:1~286.
[6] Zhang P Z, Burchfiel B C, Molnar P, et al. Later Cenozoic tectonic evolution of the Ningxia-Hui Autonomous Region, China[J]. Geological Society of America Bulletin, 1990, 102:1484~1498. doi: 10.1130/0016-7606(1990)102<1484:LCTEOT>2.3.CO;2
[7] Zhang P Z, Burchfiel B C, Molnar P, et al. Amount and style of Late Cenozoic Deformation in the Liupan Shan Area, Ningxia Autonomous Region, China[J]. Tectonics. 1991, 10(6):1111~1129. doi: 10.1029/90TC02686
[8] Burchefiel B C, Zhang P Z, Wang Y P, et al. Geology of the Haiyuan fault zone, Ningxia-Hui Autonomous Region, China, and its relation to the evolution of the northeastern margin of the Tibetan Plateau[J]. Tectonics. 1991, 10(6):1091~1110. doi: 10.1029/90TC02685
[9] 柴炽章, 张维歧, 焦德成.天景山断裂带第四纪水平活动强度的分时、分段研究[J].中国地震, 1997, 13(1):35~42. http://www.cnki.com.cn/Article/CJFDTOTAL-ZGZD701.004.htm
CHAI Chi-zhang, ZHANG Wei-Qi, JIAO De-cheng.Discussion of the Level Active Severity in Different Time Intervalsand Segments on Late Quaternary along Tianjingshan Fault Zone[J]. Earthquake Research in China, 1997, 13(1):35~42. http://www.cnki.com.cn/Article/CJFDTOTAL-ZGZD701.004.htm
[10] 冉永康, 段瑞涛, 邓启东, 等.海原断裂高湾子地点三维探槽的开挖与古地震研究[J].地震地质, 1997, 19(2):97~107. http://www.cnki.com.cn/Article/CJFDTOTAL-DZDZ702.000.htm
RAN Yong-kang, DUAN Rui-tao, DENG Qi-dong, et al. 3-D Trench Excavation and Paleoseismology at GaoWanzi of the Hai Yuan Fault[J]. Seismology and Geology, 1997, 19(2):97~107. http://www.cnki.com.cn/Article/CJFDTOTAL-DZDZ702.000.htm
[11] Ding G, Chen J, Tian Q, et al. Active faults and magnitudes of left-lateral displacement along the northern margin of the Tibetan Plateau[J]. Tectonophysics, 2004, 380(3/4):243~260.
[12] 刘静, 徐锡伟, 李岩峰, 等.以海原断裂甘肃老虎山段为例浅析走滑断裂古地震记录的完整性[J].地质通报, 2007, 26(6):650~660. http://www.cnki.com.cn/Article/CJFDTOTAL-ZQYD200706004.htm
LIU Jing, XU Xi-wei, LI Yan-feng, et al.On the completeness of paleoseismic records of strike-slips:an example from the Laohushan segment of Haiyuan fault in Gansu, China, With a discussion of several problems in the paleoearthquakestudy[J]. Geological Bulletin of China, 2007, 26(6):650~660. http://www.cnki.com.cn/Article/CJFDTOTAL-ZQYD200706004.htm
[13] Li Chuanyou, Zhang Peizhen, Yin Jinhui, Min Wei. Late Quaternary left-lateral slip rate of the Haiyuan fault, northeastern margin of the Tibetan Plateau[J]. Tectonic, 2009, 28(TC5010), doi:10.1029/2008TC002302.
[14] 施炜, 刘源, 刘洋, 等.青藏高原东北缘海原断裂带新生代构造演化[J].地学前缘, 2013, 20(4):1~17. http://www.cnki.com.cn/Article/CJFDTOTAL-DXQY201304003.htm
SHI Wei, LIU Yuan, LIU Yang, et al. Cenozoic evolution of the Haiyuan fault zone in the northeast margin of the Tibetan Plateau[J]. Earth Science Frontiers, 2013, 20(4):001~017. http://www.cnki.com.cn/Article/CJFDTOTAL-DXQY201304003.htm
[15] Chen Hong, Hu Jianmin, Gong Wangbin, Kang Rui, Li Libo. Characteristics and transition mechanism of late Cenozoic structural deformation within the Niushoushan-Luoshan fault zone at the northeastern margin of the Tibetan Plateau[J]. Journal of Asian Earth Sciences, 2015, 114:73~88. doi: 10.1016/j.jseaes.2015.06.034
[16] 杨明芝, 马禾青, 廖玉华.宁夏地震活动与研究[M].地震出版社, 2007. 25~28.
YANG Ming-zhi, MA He-qing, LIAO Yu-hua.Ningxia earthquake activity and research[M]. Earthquake Publishing House, 2007.25~28.
[17] 马寅生.黄河上游新构造活动与地质灾害风险评价[M].北京:地质出版社, 2003:1~278.
MA Yin-sheng.The new tectonic activity and risk assessment of geological hazards in the upper reaches of the Yellow River River[M]. Beijing:Geological Publishing House, 2003:1~278.
[18] 闵伟, 柴炽章, 王萍, 等.罗山东麓断裂全新世活动特征的初步研究[J].中国地震, 1992, (4):51~56. http://www.cnki.com.cn/Article/CJFDTOTAL-ZGZD199204006.htm
MIN Wei, CHAI Zhi-zhang, WANG Ping, et al. Preliminary study on the Holocene active fault features at the eastern Piedmont of the Luoshanmountain[J]. Earthquake Research in China, 1992, (4):51~56. http://www.cnki.com.cn/Article/CJFDTOTAL-ZGZD199204006.htm
[19] 闵伟, 柴炽章, 王萍, 等.罗山东麓断裂全新世古地震研究[J].高原地震, 1993, 5(4):97~102. http://www.cnki.com.cn/Article/CJFDTOTAL-GYDZ199304013.htm
MIN Wei, CHAI Zhi-zhang, WANG Ping, et al.The study on the paleoearthquakes on the eastern piedmont fault of the Luoshan mountains in Holocene[J]. Plateau Earthquake Research, 1993, 5(4):97~102. http://www.cnki.com.cn/Article/CJFDTOTAL-GYDZ199304013.htm
[20] Wang Weitao, Zhang Peizhen, Kirby Eric, Wang Lihua, Zhang Guangliang, ZhengDewen, Chai Chizhang. A revised chronology for tertiary sedimentation in the Sikouzi basin:Implications for the tectonic evolution of the northeastern corner of the Tibetan Plateau. Tectonophysics, 2011, 505:100~114. doi: 10.1016/j.tecto.2011.04.006
[21] Lin Aiming, Hu Jianmin, Gong Wangbin. Active normal faulting and the seismogenic fault of the 1739 M~8.0 Pingluo earthquake in the intracontinental Yinchuan Graben, China. Journal of Asian Earth Sciences, 2015, 114:155~173. doi: 10.1016/j.jseaes.2015.04.036
-
下载:
图(10)
计量
- 文章访问数: 990
- PDF下载数: 6
- 施引文献: 0