EVIDENCE OF HOLOCENE ACTIVITY DISCOVERED IN ANHUI ZIYANGSHAN SEGMENT OF TANLU FAULT ZONE

doi:10.3969/j.issn.0253-4967.2017.04.002

Abstract

Abstract: Anqiu-Juxian Fault(F₅) is the latest active fault in the eastern graben of the middle segment of the Tanlu fault zone. In recent years, the research results of F₅ in Jiangsu Province are abundant, and it is found that Holocene activity is prevalent in different segments, and the movement pattern is dominated by dextral strike-slip and squeezing thrust. The Anhui segment and the Jiangsu segment of the Tan-Lu fault zone are bounded by the Huaihe River. Previous studies have not discussed the extension and activity of F₅ in the south of the Huaihe River in Anhui Province. This paper chooses the Ziyangshan segment of Tanlu fault zone in the south of the Huaihe River as the breakthrough point, which is consistent with the linear image feature of extension of F₅ in Jiangsu Province. Through the remote sensing image interpretation, geological and geomorphological investigation and trench excavation, we initially get the following understanding:(1)The linear structural features of the Ziyang segment are clear, and the fault is developed on the gentle slope of the Mesozoic red sandstone uplift along the Fushan-Ziyangshan, which is the southern extension of the Anqiu-Juxian Fault(F₅); (2)The excavation of the Zhuliu trench reveals that the late Pleistocene clastic layers are interrupted, and the late late Pleistocene to early Holocene black clay layers are filled along the fault to form black fault strips and black soil-filled wedges, indicating that the latest active age of the fault is early Holocene; (3)The excavation of Zhuliu trench reveals that there are at least 3 paleo-earthquake events since the Quaternary, the first paleo-seismic event is dated to the early and middle Quaternary, and the 2nd paleo-seismic event is 20.10~13.46ka BP, the age of the third paleo-seismic event is(10.15±0.05)~(8.16±0.05)ka BP. These results complement our understanding of the late Quaternary activity in the Anhui segment of the Tanlu fault zone, providing basic data for earthquake monitoring and seismic damage prevention in Anhui Province.

Key words: Tanlu fault zone, late Quaternary, Holocene activity, Anhui Province, Ziyangshan

摘要： 安丘-莒县断裂（F₅）为郯庐断裂带中段东地堑内最新活动断裂。近年来，F₅江苏段研究成果丰硕，发现不同地段普遍存在全新世活动性，运动方式以右旋走滑兼挤压逆冲为主。以往研究未讨论过F₅在淮河以南安徽境内的延伸情况以及进一步的活动性问题。文中选取与F₅江苏段线性影像特征延伸一致的淮河南岸郯庐紫阳山段作为突破口，通过遥感影像解译、地质地貌调查和探槽开挖，初步得到以下认识：1）紫阳山段线性构造地貌特征清晰，断层发育于浮山至紫阳山一线的中生代红色砂岩隆起边缘缓坡，为安丘-莒县断裂（F₅）过淮河后的南延部分；2）朱刘探槽开挖揭示，该段错断了晚更新世晚期黏土层，晚更新世晚期-全新世早期黑色黏土层受断层活动影响沿断面灌入、填充，形成黑色断层条带及黑土充填楔，表明断层最新活动时代达全新世早期；3）朱刘探槽开挖揭示，该段第四纪以来存在至少3次古地震事件，第1次古地震事件推测年代为第四纪早、中期，第2次古地震事件年代为20.10~13.46ka BP，第3次古地震事件年代为（10.15±0.05）~（8.16±0.05） ka BP。上述研究成果弥补了对郯庐断裂带安徽段晚第四纪活动性认识的不足，为安徽省的地震监测和震害防御工作提供了基础数据。

关键词: 郯庐断裂带, 晚第四纪, 全新世活动, 安徽, 紫阳山

CLC Number:

P315.2

YANG Yuan-yuan, ZHAO Peng, ZHENG Hai-gang, YAO Da-quan, WANG Xing-zhou, MIAO Peng, LI Jun-hui, WANG Xiao-li, SHU Peng. EVIDENCE OF HOLOCENE ACTIVITY DISCOVERED IN ANHUI ZIYANGSHAN SEGMENT OF TANLU FAULT ZONE[J]. SEISMOLOGY AND GEOLOGY, 2017, 39(4): 644-655.

杨源源, 赵朋, 郑海刚, 姚大全, 王行舟, 缪鹏, 李军辉, 汪小厉, 疏鹏. 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, 2017, 39(4): 644-655.

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 application of multi-method detection technique to 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[M]//国家地震局地质研究所. 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 Quaternary fault in the middle segment of Tanlu fault zone[M]//Institute of Geology, State Seismological Bureau. Research of Active Fault (3). Seismological Press, Beijing:180-190(in Chinese).
方仲景, 丁梦林, 计凤桔, 等. 1980. 郯城-庐江断裂带地震活动的地质分析[J]. 地震地质, 2(4):39-45. FANG Zhong-jing, DING Meng-lin, JI Feng-ju, et al. 1980. Geological analysis of the seismicity in the Tancheng-Lujiang fault zone, East China[J]. Seismology and Geology, 2(4):39-45(in Chinese).
高维明, 郑郎荪. 1991. 郯庐断裂带的活断层分段与潜在震源区的划分[J]. 中国地震, 7(1):87-91. GAO Wei-ming, ZHENG Lang-sun. 1991. Active fault segmentation and the identification of potential seismic zones along the Tanlu Fault[J]. Earthquake Research in China, 7(1):87-91(in Chinese).
国家地震局地质研究所. 1987. 郯庐断裂[M]. 北京:地震出版社:219-222. Institute of Geology, State Seismological Bureau. 1987. The Tanlu Fault Zone[M]. Seismological Press, Beijing:219-222(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[M]//国家地震局地质研究所. 活动断裂研究(1). 北京:地震出版社:164-173. LI Jia-ling, CHAO Hong-tai, CUI Zhao-wen, et al. 1991. Research on the active fault of Tancheng-Xinyi segment in the Tanlu fault zone[M]//Institute of Geology, State Seismological Bureau. Research of Active Fault (1). Seismological Press, Beijing:164-173(in Chinese).
李家灵, 晁洪太, 崔昭文, 等. 1994. 郯庐活断层的分段及其大震危险性分析[J]. 地震地质, 16(2):121-126. LI Jia-ling, CHAO Hong-tai, CUI Zhao-wen, et al. 1994. Segmentation of active fault along the Tancheng-Lujiang Fault zone and evaluation of strong earthquake risk[J]. Seismology and Geology, 16(2):121-126(in Chinese).
李起彤. 1994. 郯庐断裂带江苏段全新世活动新证据[M]//中国地震学会地震地质专业委员会. 中国活动断层研究. 北京:地震出版社:140-145. LI Qi-tong. 1994. New evidence for the Holocene movement along the Jiangsu segment of the Tanlu fault zone[M]//Seismogeological Committee of the Seismological Society of China. Research on Active Fault in China. Seismological Press, Beijing:140-145(in Chinese).
彭贵, 焦文强. 1990. 嶂山闸地裂缝沉积物的¹⁴C年龄[J]. 地震地质, 12(2):179-182. PENG Gui, JIAO Wen-qiang. 1990. Radiocarbon ages of sediments in Zhangshanzha ground fissures and their geological significance[J]. Seismology and Geology, 12(2):179-182(in Chinese).
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.0253-4967.2015.01.011. SHEN Xiao-qi, YAO Da-quan, ZHENG Hai-gang, et al. 2015. The research on activity behavior of Chonggangshan-Wangqian segment of Tan-Lu fault zone since late Pleistocene[J]. Seismology and Geology, 37(1):139-148(in Chinese).
汤有标, 沈子忠, 林安培, 等. 1988. 郯庐断裂带安徽段的展布及其新构造活动[J]. 地震地质, 10(2):46-50. TANG You-biao, SHEN Zi-zhong, LIN An-pei, et al. 1988. Extending of the Tancheng-Lujiang fault zone at the Anhui section and its neotectonic activity[J]. Seismology and Geology, 10(2):46-50(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):15-18. XIE Rui-zheng, ZHU Shu-jun, DING Zheng. 1991. A discussion on the Holocene activity of the Jiangsu segment of Tanlu fault zone[J]. Journal of Seismology, (4):15-18(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).
徐嘉炜, 马国锋. 1992. 郯庐断裂带研究的十年回顾[J]. 地质论评, 38(4):316-324. XU Jia-wei, MA Guo-feng. 1992. Review of ten-years(1981-1991)of research on the Tancheng-Lujiang fault zone[J]. Geological Review, 38(4):3l6-324(in Chinese).
杨源源, 郑海刚, 姚大全, 等. 2016. 郯庐断裂带中段嶂山东侧断裂的活动特征[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. Activity 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).
姚大全, 刘家灿, 翟洪涛, 等. 2004. 郯庐断裂带白山-卅铺段第四纪以来的活动习性[J]. 地震地质, 26(4):622-629. doi:10.3969/j.issn.0253-4967.2004.04.008. YAO Da-quan, LIU Jia-can, ZHAI Hong-tao, et al. 2004. Quaternary activity of the Baishan-Sapu segment of the Tancheng-Lujiang fault zone[J]. Seismology and Geology, 26(4):622-629(in Chinese).
翟炳松, 侍继成, 杨一冲. 1992. 郯庐断裂带泗洪段全新世活动性初步研究[J]. 地震, (5):61-64, 71. ZHAI Bing-song, SHI Ji-cheng, YANG Yi-chong. 1992. Preliminary research on recent activity along Sihong segment of Tanlu fault zone[J]. Earthquake, (5):61-64, 71(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).
Wan T F. 1996. Formation and Evolution of the Tancheng-Lujiang Fault Zone[M]. China University of Geosciences Press, Beijing:1-11.
Xu J W. 1993. The Tangcheng-Lujiang Wrench Fault System[M]. John Wiley & Sons Ltd., Chichester:1-74.
Xu J W, Zhu G. 1994. Tectonic models of the Tan-Lu fault zone, eastern China[J]. International Geology Review, 36(8):771-784.

[1]	LIU Qing, LIU Shao, ZHANG Shi-min. PALEOSEISMOLOGIC STUDY ON THE YUEXI FAULT IN THE MIDSECTION OF THE DALIANGSHAN FAULT ZONE SINCE THE LATE QUATERNARY [J]. SEISMOLOGY AND GEOLOGY, 2023, 45(2): 321-337.
[2]	ZHAO Peng, LI Jun-hui, TAO Yue-chao, SHU Peng, FANG Zhen. NEW ACTIVITY PHENOMENA REVEALED BY TRENCH ON THE NORTH SIDE OF NÜSHAN LAKE IN THE TANLU FAULT ZONE AND DISCUSSION [J]. SEISMOLOGY AND GEOLOGY, 2023, 45(2): 338-354.
[3]	YANG Chen-yi, LI Xiao-ni, FENG Xi-jie, HUANG Yin-di, PEI Gen-di. SHALLOW STRUCTURE AND QUATERNARY ACTIVITY OF THE TAOCHUAN-HUXIAN FAULT, THE SUB-STRAND OF THE NORTHERN QINLING FAULT ZONE [J]. SEISMOLOGY AND GEOLOGY, 2023, 45(2): 464-483.
[4]	YUAN Hao-dong, LI An, HUANG Wei-liang, HU Zong-kai, ZUO Yu-qi, YANG Xiao-ping. GEOLOGICAL DEFORMATION OF THE TUOLI FAULT IN THE WEST JUNGGAR SINCE THE LATE QUATERNARY [J]. SEISMOLOGY AND GEOLOGY, 2023, 45(1): 49-66.
[5]	ZHANG Wei-heng, CHEN Jie, LI Tao, DI Ning, YAO Yuan. LATE QUATERNARY SHORTENING RATE OF THE SANSUCHANG ANTICLINE, SOUTHERN LONGMEN SHAN FORELAND THRUST BELT [J]. SEISMOLOGY AND GEOLOGY, 2022, 44(6): 1351-1364.
[6]	YANG Yuan-yuan, LI Peng-fei, LU Shuo, SHU Peng, PAN Hao-bo, FANG Liang-hao, ZHENG Hai-gang, ZHAO Peng, ZHENG Ying-ping, YAO Da-quan. PALEOEARTHQUAKES AND VERTICAL SLIP RATES ON THE HUAI RIVER-NÜSHAN LAKE SEGMENT OF FAULT F₅ IN THE MIDDLE SECTION OF THE TANLU FAULT ZONE [J]. SEISMOLOGY AND GEOLOGY, 2022, 44(6): 1365-1383.
[7]	FENG Jing-jing, ZHAO Yong-wei, LI Ni, CHEN Zheng-quan, WANG Li-zhu, LIU Yong-shun, NIE Bao-feng, ZHANG Xue-bin. CONE MORPHOLOGY AND ERUPTION MECHANISMS OF THE LATE QUATERNARY VOLCANO IN NORTHERN HAINAN ISLAND [J]. SEISMOLOGY AND GEOLOGY, 2022, 44(5): 1107-1127.
[8]	SHEN Jun, DAI Xun-ye, XIAO Chun, JIAO Xuan-kai, BAI Qilegeer, DENG Mei, LIU Ze-zhong, XIA Fang-hua, LIU Yu, LIU Ming. STUDY ON THE LATE QUATERNARY ACTIVITY OF THE WEST XIADIAN FAULT IN BEIJING PLAIN [J]. SEISMOLOGY AND GEOLOGY, 2022, 44(4): 909-924.
[9]	XU Wei, LIU Zhi-cheng, WANG Ji, GAO Zhan-wu, YIN Jin-hui. PRELIMINARY STUDY ON FAULTED LANDFORMS AND AGES OF RECENT STRONG EARTHQUAKE ACTIVITY ON THE KARAKORUM FAULT IN NGARI, TIBET [J]. SEISMOLOGY AND GEOLOGY, 2022, 44(4): 925-943.
[10]	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.
[11]	ZHANG Chi, LI Zhi-min, REN Zhi-kun, LIU Jin-rui, ZHANG Zhi-liang, WU Deng-yun. CHARACTERISTICS OF LATE QUATERNARY ACTIVITY OF THE SOUTHERN RIYUESHAN FAULT [J]. SEISMOLOGY AND GEOLOGY, 2022, 44(1): 1-19.
[12]	CHANG Hao, CHANG Zu-feng, LIU Chang-wei. THE RELATIONSHIP BETWEEN ACTIVITY OF JINSHA RIVER FAULT ZONE AND LARGE-SCALE LANDSLIDES: A CASE STUDY OF THE SECTION BETWEEN NARONG AND RONGXUE ALONG THE JINSHA RIVER [J]. SEISMOLOGY AND EGOLOGY, 2021, 43(6): 1435-1458.
[13]	CHANG Zu-feng, CHANG Hao, LI Jian-lin, MAO Ze-bin, ZANG Yang. HOLOCENE ACTIVITY AND PALEOEARTHQUAKES OF THE WEIXI-QIAOHOU FAULT [J]. SEISMOLOGY AND EGOLOGY, 2021, 43(4): 881-898.
[14]	ZHANG Bo, TIAN Qin-jian, WANG Ai-guo, LI Wen-qiao, XU Yue-ren, GAO Ze-min. STUDIES ON NEW ACTIVITY OF LINTAN-DANGCHANG FAULT, WEST QINLING [J]. SEISMOLOGY AND GEOLOGY, 2021, 43(1): 72-91.
[15]	BAI Luan-xi, XU Xi-wei, LUO Hao, LI Kang, LI Meng-ni, WEI Lei-ming, WANG Qi-xin, ZHAO Jun-xiang. DISCUSSION ON THE TIMING AND ITS TECTONIC SIGNIFICANCE OF ANGULAR UNCONFORMITY IN HETAO BASIN IN THE LATE QUATERNARY SEDIMENTS [J]. SEISMOLOGY AND GEOLOGY, 2020, 42(4): 806-824.