郯庐断裂带安丘-莒县断裂江苏段晚第四纪活动特征研究

doi:10.3969/j.issn.0253-4967.2015.04.018

摘要/Abstract

摘要：

安丘-莒县断裂是郯庐断裂带内活动时代最新、地表形迹最明显, 地震危险性最大的断裂。因缺少可信的地质证据, 前人对于该断裂江苏段的全新世活动情况存在较大争议。文中根据对郯庐断裂带安丘-莒县断裂江苏段开展的野外调查工作成果, 结合在宿迁市地区开展的断层活动性鉴定工作成果, 对该断裂的晚第四纪活动特征进行了探讨。本次发现的多个断裂剖面及宿迁地区的断层活动性鉴定成果都表明安丘-莒县断裂的南马陵山—宿迁段在全新世中期发生过1次古地震事件; 而后陈村探槽表明该断裂重岗山段无全新世活动迹象。安丘-莒县断裂江苏段晚第四纪活动总体以右旋走滑兼挤压逆冲为特征, 局部地区则以走滑正断为主。安丘-莒县断裂江苏段自晚更新世以来经历了多次活动, 在全新世也有明显活动, 其地震活动具强度大、频度低的特点, 其活动性总体自北向南逐渐减弱。

关键词: 郯庐断裂带, 安丘-莒县断裂, 江苏段, 晚第四纪活动性, 野外调查

Abstract:

Anqiu-Juxian Fault is an important fault in the Tanlu fault zone, with the highest seismic risk, the most recent activity date, and the most obvious surface traces. Due to lack of credible geological evidences, there is big controversy on the Holocene activity in the Jiangsu segment of this fault. Research on the characteristics of late Quaternary activity in the Jiangsu segment of Anqiu-Juxian Fault, particularly its latest activity time, is of great significance to assessment of its earthquake ability and seismic risk. Based on field investigations on the Jiangsu segment of Anqiu-Juxian Fault, and combining with the results of fault activities identification on this fault in Suqian City, we discussed the characteristics of its activities in late Quaternary. Multiple geological sections we found in this study and the results of fault activities identification in Suqian City all indicate that there was an ancient seismic event occurring in middle period of Holocene in the segment from southern Maling Mountain to Suqian City; but the trench at Houchen village did not show any evidence of Holocene activity on the Chonggangshan segment of this fault. Based on method of shallow seismic exploration, we carried out a systematic exploration of this fault to get its accurate position and activity characteristics. The results show that Anqiu-Juxian Fault in Suqian City is mainly characterized by dextral strike-slip, associated with both thrusting and extensional movement in different positions. A series of low hills were formed along the fault in the north of Suqian City, and a small graben basin was formed in the south of Suqian City, both are controlled by the dextral strike-slip movement of this fault. The Jiangsu segment of Anqiu-Juxian Fault in general is characterized by dextral strike-slip with thrusting movement. But some parts of it are characterized by dextral strike-slip with extensional movement. The Jiangsu segment of Anqiu-Juxian Fault experienced a number of activities since the late Quaternary, with an obvious activity in Holocene. The seismic activities of Jiangsu segment of Anqiu-Juxian Fault have the characteristic of high intensity and low frequency. Its activities decrease gradually from north to south as a whole.

Key words: the Tanlu fault zone, Anqiu-Juxian Fault, the Jiangsu segment, late Quaternary activity, field investigation

中图分类号:

P315.2

张鹏, 李丽梅, 冉勇康, 曹筠, 许汉刚, 蒋新. 郯庐断裂带安丘-莒县断裂江苏段晚第四纪活动特征研究[J]. 地震地质, 2015, 37(4): 1162-1176.

ZHANG Peng, LI Li-mei, RAN Yong-kang, CAO Jun, XU Han-gang, JIANG Xin. research on characteristics of late quaternary activity of the jiangsu segment of anqiu-juxian fault in the tanlu fault zone[J]. SEISMOLOGY AND GEOLOGY, 2015, 37(4): 1162-1176.

参考文献

晁洪太, 李家灵, 崔昭文, 等. 1994. 郯庐断裂带中段全新世活断层的几何结构与分段［A］. 见: 活动断裂研究(3). 北京: 地震出版社. 180—l90.
CHAO Hong-tai, LI Jia-ling, CUI Zhao-wen, et al. 1994. Geometry and segmentation of the Holocene fault in the central section of the Tanlu fault zone ［A］. In: Research on Active Fault in China(3). Seismological Press, Beijing. 180—l90(in Chinese).
晁洪太, 李家灵, 崔昭文, 等. 1997. 郯庐断裂带潍坊—嘉山段全新世活断层的活动方式与发震模式［J］. 地震研究, 20(4): 218—226.
CHAO Hong-tai, LI Jia-ling, CUI Zhao-wen, et al. 1997. Mode of motion of the Holocene fault zone in Weifang-Jiashan segment of the Tanlu fault zone and earthquake-generating model ［J］. Journal of Seismological Research, 20(4): 218—226(in Chinese).
丁梦麟. 1981. 关于华北地区几个古地震遗迹的认识［J］. 地震地质, 3(1): 67—73.
DING Meng-lin. 1981. The recognition of some paleo-earthquake ruins in North China ［J］. Seismology and Geology, 3(1): 67—73(in Chinese).
方仲景, 丁梦林, 向宏发, 等. 1987. 郯庐断裂［M］. 北京: 地震出版社.
FANG Zhong-jing, DING Meng-lin, XIANG Hong-fa, et al. 1987. The Tanlu Fault Zone ［M］. Seismological Press, Beijing(in Chinese).
高维明, 郑朗荪, 李家灵, 等. 1988. 1668年山东郯城8.5级地震的发震构造［J］. 中国地震, 4(3): 9—15.
GAO Wei-ming, ZHENG Lang-sun, LI Jia-ling, et al. 1988. Seismogenic fault of the 1668 Tancheng earthquake(M8.5)［J］. Earthquake Research in China, 4(3): 9—15(in Chinese).
李家灵. 1989. 郯庐活断层［A］. 见: 中国活断层图集. 北京: 地震出版社: 1—22.
LI Jia-ling. 1989. The active faults of the Tanlu fault zone ［A］. In: Atlas of Active Faults in China. Seismological Press, Beijing. 1—22(in Chinese).
李家灵, 晁洪太, 崔昭文, 等. 1991. 郯庐断裂带郯城—新沂段活断层研究［A］. 见: 活动断裂研究(1). 北京: 地震出版社.
LI Jia-ling, CHAO Hong-tai, CUI Zhao-wen, et al. 1991. Research on active fault in Tancheng-Xinyi segment of Tanlu fault zone ［A］. In: Research on Active fault in China(1). Seismological Press, Beijing(in Chinese).
李家灵, 晁洪太, 崔昭文, 等. 1994. 1668年郯城8.5级地震断层及其破裂机制［J］. 地震地质, 16(3): 229—237.
LI Jia-ling, CHAO Hong-tai, CUI Zhao-wen, et al. 1994. Seismic fault of the 1668 Tancheng earthquake(M8.5)and its fracture mechanism ［J］. Seismology and Geology, 16(3): 229—237(in Chinese).
李起彤. 1994. 郯庐断裂带江苏段全新世活动新证据［A］. 见: 中国活动断层研究. 北京: 地震出版社.
LI Qi-tong. 1994. New evidence for the Holocene movement along the Jiangsu segment of the Tanlu fault zone ［A］. In: Research on Active Fault in China. Seismological Press, Beijing(in Chinese).
彭贵, 焦文强. 1990. 嶂山闸地裂缝沉积物的¹⁴C测龄［J］. 地震地质, 12(2): 179—182.
PENG Gui, JIAO Wen-qiang. 1990. Radiocarbon ages of sediments in Zhangshan sluice ground fissures and their geological significance ［J］. Seismology and Geology, 12(2): 179—182(in Chinese).
王华林. 1995. 1668年郯城8.5级地震的全新世滑动速率、古地震和强震复发周期［J］. 西北地震学报, 17(4): 1—12.
WANG Hua-lin. 1995. Holocene displacement rate, paleoearthquakes and recurrence intervals of strong earthquake along the 1668 Tancheng earthquake(M_S8.5)fault ［J］. Northwestern Seismological Journal, 17(4): 1—12(in Chinese).
吴少武, 张绍治, 刘仲芳. 1988. 郯庐断裂带江苏段活动特征［J］. 中国地震, 4(3): 158—161.
WU Shao-wu, ZHANG Shao-zhi, LIU Zhong-fang. 1988. Activity of Jiangsu segment of the Tanlu fault zone ［J］. Earthquake Research in China, 4(3): 158—161.
谢瑞征, 丁政, 朱书俊, 等. 1991. 郯庐断裂带江苏及邻区第四纪活动特征［J］. 地震学刊, (4): 1—7.
XIE Rui-zheng, DING Zheng, ZHU Shu-jun, et al. 1991. Active characteristics in the Jiangsu segment of the Tanlu fault zone and its vicinity ［J］. Journal of Seismology, (4): 1—7(in Chinese).
Wallace R E. 1970. Earthquake recurrence intervals on the San Andreas Fault, California ［J］. Geol Soc Am Bull, 8(10), 2875—2890.

[1]	赵朋, 李军辉, 陶月潮, 疏鹏, 方震. 郯庐断裂带女山湖北侧探槽的新活动现象及讨论[J]. 地震地质, 2023, 45(2): 338-354.
[2]	郑海刚, 姚大全, 赵朋, 杨源源, 黄金水. 郯庐断裂带赤山段全新世新活动的特征[J]. 地震地质, 2023, 45(1): 127-138.
[3]	杨源源, 李鹏飞, 路硕, 疏鹏, 潘浩波, 方良好, 郑海刚, 赵朋, 郑颖平, 姚大全. 郯庐断裂带中段F₅断裂淮河-女山湖段的古地震与垂直滑动速率[J]. 地震地质, 2022, 44(6): 1365-1383.
[4]	张浩, 王金艳, 许汉刚, 李丽梅, 蒋新, 赵启光, 顾勤平. 安丘-莒县断裂新沂段的几何结构特征[J]. 地震地质, 2022, 44(6): 1448-1468.
[5]	王雷, 许洪泰, 王志才, 杨传成, 张建民, 王冬雷, 夏暖, 蔡明刚, 鲁人齐, 任治坤. 安丘-莒县断裂驸马营覆盖区第四纪活动特征[J]. 地震地质, 2022, 44(5): 1156-1171.
[6]	曹筠, 李彦宝, 冉勇康, 徐锡伟, 马董伟, 张志强. 城市隐伏活动断层避让典型案例分析--以新沂市郯庐断裂带沿线某场地为例[J]. 地震地质, 2022, 44(4): 1071-1085.
[7]	沈军, 戴训也, 肖淳, 焦轩凯, 白其乐格尔, 邓梅, 刘泽众, 夏方华, 刘玉, 刘明. 夏垫西断裂的晚第四纪活动性[J]. 地震地质, 2022, 44(4): 909-924.
[8]	秦晶晶, 刘保金, 王志才, 酆少英, 邓小娟, 花鑫升, 李倩. 利用地震反射剖面探测研究安丘-莒县断裂板泉段的浅部构造特征[J]. 地震地质, 2022, 44(2): 349-362.
[9]	孙业君, 黄耘, 刘泽民, 郑建常, 江昊琳, 李婷婷, 叶青, 方韬. 郯庐断裂带鲁苏皖段及邻区构造应力场特征及其动力学意义[J]. 地震地质, 2021, 43(5): 1188-1207.
[10]	计昊旻, 李安, 张世民. 基于冲沟右旋水平位错的安丘-莒县断裂地震特征位移分析[J]. 地震地质, 2021, 43(3): 471-487.
[11]	顾勤平, 康清清, 张鹏, 孟科, 吴珊珊, 李正楷, 王俊菲, 黄群, 蒋新, 李大虎. 郯庐断裂带中南段及邻区Rayleigh波相速度与方位各向异性[J]. 地震地质, 2020, 42(5): 1129-1152.
[12]	顾勤平, 许汉刚, 晏云翔, 赵启光, 李丽梅, 孟科, 杨浩, 王金艳, 蒋新, 马董伟. 郯庐断裂带新沂段地壳浅部结构和断裂活动性探测[J]. 地震地质, 2020, 42(4): 825-843.
[13]	章鑫, 杜学彬. 郯庐断裂带南段对近地表大地电流的分异性[J]. 地震地质, 2020, 42(4): 909-922.
[14]	梁明剑, 陈立春, 冉勇康, 李彦宝, 王栋, 高帅坡, 韩明明, 曾蒂. 鲜水河断裂带雅拉河段晚第四纪活动性[J]. 地震地质, 2020, 42(2): 513-525.
[15]	郑颖平, 杨晓平, 疏鹏, 路硕, 方良好, 石金虎, 黄雄南, 刘春茹. 合肥盆地中郯庐断裂带西支乌云山-合肥断裂最新活动特征[J]. 地震地质, 2020, 42(1): 50-64.