NEW EVIDENCES OF HOLOCENE ACTIVITY IN THE JIANGSU SEGMENT OF ANQIU-JUXIAN FAULT OF THE TANLU FAULT ZONE

doi:10.3969/j.issn.0253-4967.2019.03.003

Abstract

Abstract: Anqiu-Juxian Fault is an important fault in the Tanlu fault zone, with the largest seismic risk, the most recent activity date and the most obvious surface traces. It is also the seismogenic fault of the Tancheng M8 1/2 earthquake in 1668. There are many different views about the southern termination location of surface rupture of the Tancheng earthquake and the Holocene activity in Jiangsu segment of this fault. Research on the latest activity time of the Jiangsu segment of Anqiu-Juxian Fault, particularly the termination location of surface rupture of the Tancheng earthquake, is of great significance to the assessment of its earthquake potential and seismic risk.
Based on trench excavation on the Jiangsu segment of Anqiu-Juxian Fault, we discuss the time and characteristics of its latest activity. Multiple geological sections from southern Maling Mountain to Chonggang Mountain indicate that there was an ancient seismic event occurring in Holocene on the Jiangsu segment of Anqiu-Juxian Fault. We suggest the time of the latest seismic event is about(4.853±0.012)~(2.92±0.3)ka BP by dating results. The latest activity is characterized by thrust strike-slip faulting, with the maximum displacement of 1m. Combined with the fault rupture characteristics of each section, it is inferred that only one large-scale paleo-earthquake event occurred on the Jiangsu segment of Anqiu-Juxian Fault since the Holocene.
The upper parts of the fault are covered by horizontal sand layers, not only on the trench in the west of Chonggang mountain but also on the trench in Hehuan Road in Suqian city, which indicates that the main part of the Jiangsu segment of Anqiu-Juxian Fault was probably not the surface rupture zone of the 1668 Tancheng M8 1/2 earthquake.
In short, the Jiangsu segment of Anqiu-Juxian Fault has experienced many paleo-earthquake events since the late Pleistocene, with obvious activity during the Holocene. The seismic activities of the Jiangsu segment of Anqiu-Juxian Fault have the characteristics of large magnitude and low frequency. The Jiangsu segment of Anqiu-Juxian Fault has the deep tectonic and seismic-geological backgrounds of big earthquakes generation and should be highly valued by scientists.

Key words: the Tanlu fault zone, Anqiu-Juxian Fault, the Jiangsu segment, Tancheng earthquake, surface rupture

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，也是1668年郯城M8 1/2地震的发震断层。前人对郯城地震的地表破裂向S终止的位置存在多种观点，对该断裂江苏段的全新世活动情况也存在较大争议。文中通过在重岗山西侧和宿迁合欢路北侧开展的探槽开挖工作，发现了该断裂全新世活动的新证据，并对其最新活动时间进行了探讨。重岗山西侧后陈村探槽和宿迁合欢路北侧探槽都表明安丘-莒县断裂江苏段在全新世有过明显活动，推测最新一次古地震事件的发生时间为（4.853±0.012）~（2.92±0.3） ka BP。最新活动性质以走滑逆冲为主，剖面上获得的最大断错量为1m。未发现1668年郯城M8 1/2地震的地表破裂带到达江苏段的明确证据。

关键词: 郯庐断裂带, 安丘-莒县断裂, 江苏段, 郯城地震, 地表破裂

CLC Number:

P315.2

ZHANG Peng, ZHANG Yuan-yuan, LI Li-mei, JIANG Xin, MENG Ke. NEW EVIDENCES OF HOLOCENE ACTIVITY IN THE JIANGSU SEGMENT OF ANQIU-JUXIAN FAULT OF THE TANLU FAULT ZONE[J]. SEISMOLOGY AND GEOLOGY, 2019, 41(3): 576-586.

张鹏, 张媛媛, 李丽梅, 蒋新, 孟科. 郯庐断裂带安丘-莒县断裂江苏段全新世活动的新证据[J]. 地震地质, 2019, 41(3): 576-586.

References

曹筠, 冉勇康, 许汉刚, 等. 2015. 宿迁城市活动断层探测多方法技术运用的典型案例［J］. 地震地质, 37(2):430-439. doi:10.3969/j.issn.0253-4967.2015.02.007.
CAO Jun, RAN Yong-kang, XU Han-gang, et al. 2015. Typical case analysis on multi-method detection technology for active fault exploration in Suqian City［J］. Seismology and Geology, 37(2):430-439(in Chinese).
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［G］//邓起东. 活动断裂研究(3). 北京:地震出版社. 180-190.
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［G］//Deng Qi-dong. Research on Active Fault in China(3). Seismological Press, Beijing:180-190(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).
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(M=8.5)［J］. Earthquake Research in China, 4(3):9-15(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［G］//邓起东. 活动断裂研究(1)［M］. 北京:地震出版社.
LI Jia-ling, CHAO Hong-tai, CUI Zhao-wen, et al. 1991. Research on the active fault in Tancheng-Xinyi segment of Tanlu fault zone［G］//Deng Qi-dong. 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(M=8.5) 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［G］//邓起东. 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［G］//Deng Qi-dong. Research on Active Fault in China. Seismological Press, Beijing(in Chinese).
冉勇康, 王虎, 杨会丽, 等. 2014. 中国大陆古地震研究的关键技术与案例解析(4):古地震定年技术的样品采集和事件年代分析［J］. 地震地质, 36(4):939-955. doi:0.3969/j.issn.0253-4967.2014.04.001.
RAN Yong-kang, WANG Hu, YANG Hui-li, et al. 2014. Key techniques and several cases analysis in paleoseismic studies in mainland China(4):Sampling and event analysis of paleoseismic dating methods［J］. Seismology and Geology, 36(4):939-955.
沈小七, 姚大全, 郑海刚, 等. 2015. 郯庐断裂带重岗山-王迁段晚更新世以来的活动习性［J］. 地震地质, 37(1):139-148. doi:10.3969/j.issn.0253-4967.2015.11.
SHEN Xiao-qi, YAO Da-quan, ZHENG Hai-gang, et al. 2015. The research on active behavior of Chonggangshan-Wangqian segment of Tanlu fault zone since Pleistocene［J］. Seismology and Geology, 37(1):139-148(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_S=8.5)fault［J］. Northwestern Seismological Journal, 17(4):1-12(in Chinese).
谢瑞征, 朱书俊, 丁政. 1991. 郯庐断裂带江苏段全新世活动问题的商榷［J］. 地震学刊, (4):15-17.
XIE Rui-zheng, ZHU Shu-jun, DING Zheng. 1991. Discuss on activity in Holocene of the Jiangsu segment of the Tanlu fault zone［J］. Journal of Seismology, (4):15-17(in Chinese).
许汉刚, 范小平, 冉勇康, 等. 2016. 郯庐断裂带宿迁段F₅断裂浅层地震勘探新证据［J］. 地震地质, 38(1):31-43. doi:10.3969/j.issn.0253-4967.2016.01.003.
XU Han-gang, FAN Xiao-ping, RAN Yong-kang, et al. 2016. New evidences of the Holocene fault in Suqian segment of the Tanlu fault zone discovered by shallow seismic exploration method［J］. Seismology and Geology, 38(1):31-43(in Chinese).
杨源源, 赵朋, 郑海刚, 等. 2017. 郯庐断裂带安徽紫阳山段发现全新世活动证据［J］. 地震地质, 39(4):644-655. doi:10.3969/j.issn.0253-4967.2017.04.002.
YANG Yuan-yuan, ZHAO Peng, ZHENG Hai-gang, et al. 2017. Evidence of Holocene activity discovered in Anhui Ziyangshan segment of Tanlu fault zone［J］. Seismology and Geology, 39(4):644-655(in Chinese).
杨源源, 郑海刚, 姚大全, 等. 2016. 郯庐断裂带中段嶂山断裂东侧断裂活动特征［J］. 地震地质, 38(3):582-595. doi:10.3969/j.issn.0253-4967.2016.03.006.
YANG Yuan-yuan, ZHENG Hai-gang, YAO Da-quan, et al. 2016. Active features of faults at the east of Zhangshan on the middle segment of Tanlu fault zone［J］. Seismology and Geology, 38(3):582-595(in Chinese).
张鹏, 李丽梅, 冉勇康, 等. 2015. 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, 37(4):1162-1176. doi:10.3969/j.issn.0253-4967.2015.04.018.
ZHANG Peng, LI Li-mei, RAN Yong-kang, et al. 2015. Research on characteristics of late Quaternary activity of the Jiangsu segment of Anqiu-Juxian Fault in the Tanlu fault zone［J］. Seismology and Geology, 37(4):1162-1176(in Chinese).
Liu B, Zhu G, Zhai M J, et al. 2015. Quaternary faulting of the Jiangsu part of the Tanlu fault zone, East China:Evidence from field investigations and OSL dating［J］. Journal of Asian Earth Science, 114:89-102.
Min W, Liu Y G, Jiao D C, et al. 2013. Evidence for Holocene activity of the Yilan-Yitong Fault, northeastern of the Tanlu fault zone in Northeast China［J］. Journal of Asian Earth Science, 67-68:207-216.

[1]	WANG Liao, XIE Hong, YUAN Dao-yang, LI Zhi-min, XUE Shan-yu, SU Rui-huan, WEN Ya-meng, SU Qi. THE SURFACE RUPTURE CHARACTERISTICS BASED ON THE GF-7 IMAGES INTERPRETATION AND THE FIELD INVESTIGA-TION OF THE 2022 MENYUAN M_S6.9 EARTHQUAKE [J]. SEISMOLOGY AND GEOLOGY, 2023, 45(2): 401-421.
[2]	WU Zhong-hai, Baima Duoji, YE Qiang, HAN Shuai, SHI Ya-ran, Nima Ciren, GAO Yang. THE QUATERNARY NORMAL FAULTING AND RECENT CO-SEISMIC SURFACE RUPTURE AND RELATED SEISMOLOGICAL SIGNIFICANCE ALONG THE ARU CO GRABEN SYSTEM IN NORTHERN NGARI, TIBET [J]. SEISMOLOGY AND GEOLOGY, 2023, 45(1): 67-91.
[3]	ZHANG Hao, WANG Jin-yan, XU Han-gang, LI Li-mei, JIANG Xin, ZHAO Qi-guang, GU Qin-ping. GEOMETRIC STRUCTURE CHARACTERISTICS OF XINYI SEGMENT OF ANQIU-JUXIAN FAULT [J]. SEISMOLOGY AND GEOLOGY, 2022, 44(6): 1448-1468.
[4]	LI Dong-chen, REN Jun-jie, ZHANG Zhi-wen, LIU Liang. RESEARCH ON SEMI-AUTOMATIC EXTRACTION METHOD OF SEISMIC SURFACE RUPTURES BASED ON HIGH-RESOLUTION UAV IMAGE: TAKING THE 2021 M_S7.4 MADUO EARTHQUAKE IN QINGHAI PROVINCE AS AN EXAMPLE [J]. SEISMOLOGY AND GEOLOGY, 2022, 44(6): 1484-1502.
[5]	LI Chuan-you, SUN Kai, MA Jun, LI Jun-jie, LIANG Ming-jian, FANG Li-hua. THE 2022 M6.8 LUDING EARTHQUAKE: A COMPLICATED EVENT BY FAULTING OF THE MOXI SEGMENT OF THE XIANSHUIHE FAULT ZONE [J]. SEISMOLOGY AND GEOLOGY, 2022, 44(6): 1648-1666.
[6]	WANG Lei, XU Hong-tai, WANG Zhi-cai, YANG Chuan-cheng, ZHANG Jian-min, WANG Dong-lei, XIA Nuan, CAI Ming-gang, LU Ren-qi, REN Zhi-kun. QUATERNARY TECTONIC FEATURES OF THE FUMAYING HIDDEN AREA OF THE ANQIU-JUXIAN FAULT [J]. SEISMOLOGY AND GEOLOGY, 2022, 44(5): 1156-1171.
[7]	CAO Jun, LI Yan-bao, RAN Yong-kang, XU Xi-wei, MA Dong-wei, ZHANG Zhi-qiang. TYPICAL CASE ANALYSIS ON SETBACK DISTANCE FOR URBAN BURIED ACTIVE FAULT: AN EXAMPLE SITE ALONG THE TANLU FAULT ZONE IN XINYI CITY [J]. SEISMOLOGY AND GEOLOGY, 2022, 44(4): 1071-1085.
[8]	YAO Sheng-hai, GAI Hai-long, YIN Xiang, LIU Wei, ZHANG Jia-qing, YUAN Jian-xin. A DISCUSSION ON THE RELATIONSHIP BETWEEN THE SUR-FACE RUPTURE ZONE IN FRONT OF THE AMUNIKESHAN MOUNTAIN AND THE 1962 M6.8 EARTHQUAKE [J]. SEISMOLOGY AND GEOLOGY, 2022, 44(4): 976-991.
[9]	QIN Jing-jing, LIU Bao-jin, WANG Zhi-cai, FENG Shao-ying, DENG Xiao-juan, HUA Xin-sheng, LI Qian. RESEARCH ON SHALLOW STRUCTURAL CHARACTERISTICS IN THE BANQUAN SEGMENT OF ANQIU-JUXIAN FAULT ZONE BASED ON SHALLOW SEISMIC REFLECTION PROFILING [J]. SEISMOLOGY AND GEOLOGY, 2022, 44(2): 349-362.
[10]	LIU Xiao-li, XIA Tao, LIU-ZENG Jing, YAO Wen-qian, XU Jing, DENG De-bei-er, HAN Long-fei, JIA Zhi-ge, SHAO Yan-xiu, WANG Yan, YUE Zi-yang, GAO Tian-qi. DISTRIBUTED CHARACTERISTICS OF THE SURFACE DEFORMATIONS ASSOCIATED WITH THE 2021 M_W7.4 MADOI EARTHQUAKE, QINGHAI, CHINA [J]. SEISMOLOGY AND GEOLOGY, 2022, 44(2): 461-483.
[11]	HAN Long-fei, LIU-ZENG Jing, YAO Wen-qian, WANG Wen-xin, LIU Xiao-li, GAO Yun-peng, SHAO Yan-xiu, LI Jin-yang. DETAILED MAPPING OF THE SURFACE RUPTURE NEAR THE EPICENTER SEGMENT OF THE 2021 MADOI M_W7.4 EARTHQUAKE AND DISCUSSION ON DISTRIBUTED RUPTURE IN THE STEP-OVER [J]. SEISMOLOGY AND GEOLOGY, 2022, 44(2): 484-505.
[12]	YAO Wen-qian, WANG Zi-jun, LIU-ZENG Jing, LIU Xiao-li, HAN Long-fei, SHAO Yan-xiu, WANG Wen-xin, XU Jing, QIN Ke-xin, GAO Yun-peng, WANG Yan, LI Jin-yang, ZENG Xian-yang. DISCUSSION ON COSEISMIC SURFACE RUPTURE LENGTH OF THE 2021 M_W7.4 MADOI EARTHQUAKE, QINGHAI, CHINA [J]. SEISMOLOGY AND GEOLOGY, 2022, 44(2): 541-559.
[13]	GAI Hai-long, LI Zhi-min, YAO Sheng-hai, LI Xin. PRELIMINARY INVESTIGATION AND RESEARCH ON SURFACE RUPTURE CHARACTERISTICS OF THE 2022 QINGHAI MENYUAN M_S6.9 EARTHQUAKE [J]. SEISMOLOGY AND EGOLOGY, 2022, 44(1): 238-255.
[14]	LIANG Kuan, HE Zhong-tai, JIANG Wen-liang, LI Yong-sheng, LIU Ze-min. SURFACE RUPTURE CHARACTERISTICS OF THE MENYUAN M_S6.9 EARTHQUAKE ON JANUARY 8, 2022, QINGHAI PROVINCE [J]. SEISMOLOGY AND GEOLOGY, 2022, 44(1): 256-278.
[15]	LI Zhan-fei, XU Xi-wei, MENG Yong-qi, ZHAO Shuai, SUN Jia-jun, CHENG Jia, LI Kang, KANG Wen-jun. THE LATEST DEFORMATION STYLE ALONG THE NORTH CHINA BLOCK REVEALED BY HIGH-RESOLUTION TOPOGRAPHIC DATA: A CASE STUDY ON XIADIAN FAULT [J]. SEISMOLOGY AND GEOLOGY, 2022, 44(1): 98-114.