TRANSVERSE STRUCTURES FEATURES OF DIFFERENT DEPTHS DERIVED FROM BOUGUER GRAVITY ANOMALIES IN THE SOUTHERN SEGMENT OF TAN-LU FAULT ZONE

doi:10.3969/j.issn.0253-4967.2016.02.011

Abstract

Abstract:

To research the faults distribution and deep structures in the southern segment of Tan-Lu fault zone(TLFZ) and its adjacent area, this paper collects the Bouguer gravity data and makes separation by the multi-scale wavelet analysis method to analyze the crustal transverse structure of different depths. Meanwhile Moho interface is inversed by Parker variable density model. Research indicates that the southern segment of TLFZ behaves as a NNE-directed large-scale regional field gravity gradient zone, which separates the west North China-Dabie orogen block and the east Yangtze block, cutting the whole crust and lithosphere mantle. There are quite differences of density structures and tectonic features between both sides of this gradient belt. The sedimentary and upper crustal density structure is complex. The two east branches of TLFZ behave as linear gravity anomalous belt throughout the region, whereas the two west branches of TLFZ continue to extend after truncating the EW-trending gravity anomaly body. The lower crustal density structure is relatively simple. TLFZ behaves as a broad and gentle low abnormal belt, which reflects the Cretaceous-Paleogene extension environment caused graben structure. The two west branches of TLFZ, running through Hefei city, extend southward along the west margin of Feidong depression and pinch out in Shucheng area due to the high density trap occlusions in the south of Shucheng. The Feizhong Fault, Liu'an-Hefei Fault, and Feixi-Hanbaidu Fault intersect the two west branch faults of TLFZ without extending to the east. Recent epicenters are mainly located in conversion zones between the high-density and the low-density anomaly, especially in TLFZ and the junction of the faults, where earthquakes frequently occurred in the upper and middle crust. As strong earthquakes rarely occur in the southern segment of TLFZ, considering its deep feature of abrupt change of the Moho and intersections with many EW-trending faults, the hazard of strong earthquake cannot be ignored.

Key words: the southern segment of Tan-Lu fault zone, Bouguer gravity, multi-scale wavelet analysis, transverse structure, Moho interface, seismic activity

摘要：

为研究郯庐断裂带南段及周边构造的深部特征、空间展布、交切关系，文中利用小波多尺度分析方法对该地区的布格重力场进行场源分离，剖析不同深度下的地壳横向构造；同时采用Parker变密度模型对莫霍面深度进行反演分析。研究表明，郯庐断裂带南段表现为NNE走向的大型重力区域场梯度条带，切割深度达岩石圈地幔，其两侧密度结构及构造特征差异明显。沉积层及上地壳密度结构复杂，郯庐带东支2条断裂形成线性异常纵贯区域；而西支2条断裂线性异常较弱，截切EW向的重力异常体断续延展。中、下地壳密度结构简单，断裂带形成宽缓的低异常条带，反映了白垩纪-古近纪伸展环境下造成的地堑式构造。西支2条主干断裂纵穿合肥市，沿肥东凹陷西缘向S延伸，由于舒城以南的高密度圈闭体遮挡，尖灭于舒城县一带；而肥中、六安-合肥、肥西-韩摆渡EW向的深大断裂交切于西支，未延伸至东支。该区近代小震多发生于断裂构造所对应的重力高、低异常转化带之间，尤其是断裂之间的交会处与郯庐构造带内部，郯庐断裂带南段为历史强震空区段，考虑到断裂带莫霍面陡变及与多条深大断裂交切等深部环境，中强震危险性不容忽视。

关键词: 郯庐断裂带南段, 布格重力异常, 小波多尺度分析, 横向构造, 莫霍面, 地震活动性

CLC Number:

P315.2

WANG Xin, ZHANG Jing-fa, JIANG Wen-liang, JIANG Hong-bo, TIAN Tian, GAO Min, FU Ping-jie. TRANSVERSE STRUCTURES FEATURES OF DIFFERENT DEPTHS DERIVED FROM BOUGUER GRAVITY ANOMALIES IN THE SOUTHERN SEGMENT OF TAN-LU FAULT ZONE[J]. SEISMOLOGY AND GEOLOGY, 2016, 38(2): 370-385.

王鑫, 张景发, 姜文亮, 蒋洪波, 田甜, 高敏, 付萍杰. 郯庐断裂带南段重力异常及不同深度的横向构造特征[J]. 地震地质, 2016, 38(2): 370-385.

References

安徽省地质矿产局. 1987. 安徽省区域地质志［M］. 北京:地质出版社. Bureau of Geology and Mineral Resources of Anhui Province. 1987. Regional Geology of Anhui Province［M］. Geological Publish House, Beijing(in Chinese).
邓起东, 冉勇康, 杨晓平, 等. 2007. 中国活动构造图［M］. 北京:地震出版社. DENG Qing-dong, RAN Yong-kang, YANG Xiao-ping, et al. 2007. Map of Active Fault in China［M］. Seismological Press, Beijing(in Chinese).
董树文, 吴宣志, 高锐, 等. 1998. 大别造山带地壳速度结构与动力学［J］. 地球物理学报, 41(3):349-361. DONG Shu-wen, WU Xuan-zhi, GAO Rui, et al. 1998. On the crust velocity levels and dynamics of the Dabieshan orogenic belt［J］. Chinese J Geophys, 41(3):349-361(in Chinese).
杜晓娟, 孟令顺, 张凤旭, 等. 2005. 利用重磁场研究郯庐断裂及周边构造［J］. 吉林大学学报(地球科学版), 35:51-56. DU Xiao-juan, MENG Ling-shun, ZHANG Feng-xu, et al. 2005. Study on Tanlu fault zone and adjacent area by gravity and magnetic field［J］. Journal of Jilin University:Earth Science Edition, 35:51-56(in Chinese).
方盛明, 张先康, 嘉世旭, 等. 2002. 华北地区布格重力异常的多尺度分解特征与地震活动性［J］. 大地测量与地球动力学, 22(1):34-39. FANG Sheng-ming, ZHANG Xian-kang, JIA Shi-xu, et al. 2002. Multi-scale decomposition of Bouguer anomaly and seismic activity in North China［J］. Journal of Geodesy and Geodynamics, 22(1):34-39(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-jin, DING Meng-lin, JI Feng-ju, et al. 1980. Geological analysis of the seismicity in the Tangcheng-Lujiang fault zone, East China［J］. Seismology and Geology, 2(4):39-45(in Chinese).
方仲景, 丁梦林, 向宏发, 等. 1986. 郯庐断裂带的基本特征［J］. 科学通报, (1):52-55. FANG Zhong-jing, DING Meng-lin, XIANG Hong-fa, et al. 1986. The basic feature of Tanlu fault zone［J］. Chinese Science Bulletin, (1):52-55(in Chinese).
高德章, 侯遵泽, 唐建. 2000. 东海及邻区重力异常多尺度分解［J］. 地球物理学报, 43(6):842-849. GAO De-zhang, HOU Zun-ze, TANG Jian. 2000. Multiscale analysis of gravity anomalies on East China Sea and adjacent regions［J］. Chinese J Geophys, 43(6):842-849(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. Institute of Geology, China Earthquake Administration. 1987. The Tanlu Fault［M］. Seismological Press, Beijing(in Chinese).
侯遵泽, 杨文采. 1997. 中国重力异常的小波变换与多尺度分析［J］. 地球物理学报, 40(1):85-95. HOU Zun-ze, YANG Wen-cai. 1997. Wavelet transform and multi-scale analysis on gravity anomalies of China［J］. Chinese J Geophys, 40(1):85-95(in Chinese).
黄耘, 李清河, 张元生, 等. 2011. 郯庐断裂带鲁苏皖段及邻区地壳速度结构［J］. 地球物理学报, 54(10):2549-2559. HUANG Yun, LI Qing-he, ZHANG Yuan-sheng, et al. 2011. Crustal velocity structure beneath the Shandong-Jiangsu-Anhui segment of the Tancheng-Lujiang fault zone and adjacent areas［J］. Chinese J Geophys, 54(10):2549-2559(in Chinese).
霍光辉, 王海芹, 王仁祥, 等. 2009. 郯庐断裂带中南段重磁特征与深部构造［J］. 山东国土资源, 25(8):9-13. HUO Guang-hui, WANG Hai-qin, WANG Ren-xiang, et al. 2009. Gravity and magnetic characteristics and deep structure in middle and south part of Tanlu Fault belt［J］. Land and Resources in Shandong Province, 25(8):9-13(in Chinese).
姜文亮, 张景发. 2012. 首都圈地区精细地壳结构-基于重力场反演［J］. 地球物理学报, 55(5):1646-1661. JIANG Wen-liang, ZHANG Jing-fa. 2012. Fine crustal structure beneath Capital area of China derived from gravity［J］. Chinese J Geophys, 55(5):1646-1661(in Chinese).
李春峰, 陈冰, 周祖翼. 2009. 中国东部及邻近海域磁异常数据所揭示的深部构造［J］. 中国科学(D 辑), 39(12):1770-1779. LI Chun-feng, CHEN Bing, ZHOU Zu-yi. 2009. Deep crustal structures of eastern China and adjacent seas revealed by magnetic data［J］. Science in China(Series D), 52(7):984-993.
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).
李云平, 吴时国, 韩文功, 等. 2006. 合肥盆地和郯庐断裂带南段深部地球物理特征研究［J］. 地球物理学报, 49(1):115-122. LI Yun-ping, WU Shi-guo, HAN Wen-gong, et al. 2006. A study of on geophysical features of deep structures of the Hefei Basin and southern Tanlu fault zone［J］. Chinese J Geophys, 49(1):115-122(in Chinese).
刘保金, 酆少英, 姬计法, 等. 2015. 郯庐断裂带中南段的岩石圈精细结构［J］. 地球物理学报, 58(5):1610-1621. LIU Bao-jin, FENG Shao-ying, JI Ji-fa, et al. 2015. Fine lithosphere structure beneath the middle-southern segment of the Tanlu fault zone［J］. Chinese J Geophys, 58(5):1610-1621(in Chinese).
刘福田, 徐佩芬, 刘劲松, 等. 2003. 大陆深俯冲带的地壳速度结构:东大别造山带深地震宽角反射/折射研究［J］. 地球物理学报, 46(3):366-372. LIU Fu-tian, XU Pei-fen, LIU Jing-song, et al. 2003. The crustal velocity structure of continental deep subduction belt:Study on the eastern Dabie orogen by seismic wide-angle reflection/refraction［J］. Chinese J Geophys, 46(3):366-372(in Chinese).
刘天佑. 2007. 位场勘探数据处理新方法［M］. 北京:科学出版社. LIU Tian-you. 2007. New Processing Method of Source Field Prospecting Data［M］. Science Press, Beijing(in Chinese).
路晓翠, 张景发, 朱鲁, 等. 2012. 利用小波多尺度分解研究郯庐断裂带苏鲁段构造［J］. 地球物理学进展, 27(1):58-67. LU Xiao-cui, ZHANG Jing-fa, ZHU Lu, et al. 2012. Study on structure in the Sulu segment of Tanlu fault zone by wavelet multi-scale decomposition［J］. Progress in Geophysics, 27(1):58-67(in Chinese).
马杏垣. 1987. 中国岩石圈动力学纲要说明书［M］. 北京:地质出版社. MA Xing-yuan. 1987. Outline of Lithospheric Dynamics of China, the Explanation of Lithospheric Dynamics Map［M］. Geological Publishing House, Beijing(in Chinese).
苏蓉. 2010. 滁河断裂特征研究及其意义［D］. 合肥:合肥工业大学. SU Rong. 2010. Study on the characteristic and significance of the Chuhe Fault［D］. Hefei University of Technology, Hefei(in Chinese).
汤加富, 李怀坤, 娄清. 2003. 郯庐断裂南段研究进展与断裂性质讨论［J］. 地质通报, 22(6):426-436. TANG Jia-fu, LI Huai-kun, LOU Qing. 2003. Progress in the study of the southern segment of Tanlu Fault and a discussion of the nature of the fault［J］. Geological Bulletin of China, 22(6):426-436(in Chinese).
王小凤, 李中坚, 陈柏林, 等. 2000. 郯庐断裂带［M］. 北京:地质出版社. WANG Xiao-feng, LI Zhong-jian, CHEN Bo-lin, et al. 2000. Tanlu Fault Zone［M］. Geological Publishing House, Beijing(in Chinese).
王鑫, 张景发, 付萍杰, 等. 2015. 沂沭断裂带重力场及地壳结构特征［J］. 地震地质, 37(3):731-747. doi:10.3969/j.issn.0253-4967.2015.03.006. WANG Xin, ZHANG Jing-fa, FU Ping-jie, et al. 2015. Deep structures of Yishu fault zone derived from gravity data［J］. Seismology and Geology, 37(3):731-747(in Chinese).
谢成龙, 朱光, 牛漫兰, 等. 2008. 郯庐断裂带巢湖-庐江段晚中生代火山岩地球化学特征与岩石圈减薄过程［J］. 岩石学报, 24(8):1823-1838. XIE Cheng-long, ZHU Guang, NIU Man-lan, et al. 2008. Geochemistry of Late Mesozoic volcanic rocks from the Chaohu-Lujiang segment of the Tanlu fault zone and lithospheric thinning processes［J］. Acta Petrologica Sinica, 24(8):1823-1838(in Chinese).
熊小松, 高锐, 李秋生, 等. 2009. 深地震探测揭示的华南地区莫霍面深度［J］. 地球学报, 30(6):774-786. XIONG Xiao-song, GAO Rui, LI Qiu-sheng, et al. 2009. The Moho depth of South China revealed by seismic probing［J］. Acta Geosientica Sinica, 30(6):774-786(in Chinese).
徐嘉炜. 1980. 郯-庐断裂带巨大的左行平移运动［J］. 合肥工业大学学报, (1):1-26. XU Jia-wei. 1980. The great left-lateral horizontal displacement of Tancheng-Lujiang fault zone, eastern China［J］. Journal of Hefei Polytechnic University, (1):1-26(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):316-324(in Chinese).
杨文采, 施志群, 侯遵泽, 等. 2001. 离散小波变换与重力异常多重分解［J］. 地球物理学报, 44(4):534-541. YANG Wen-cai, SHI Zhi-qun, HOU Zun-ze, et al. 2001. Discrete wavelet transform for multiple decomposition of gravity anomalies［J］. Chinese J Geophys, 44(4):534-541(in Chinese).
姚大全, 刘加灿, 李杰, 等. 2003. 六安-霍山地震危险区地震活动和地震构造［J］. 地震地质, 25(2):211-219. YAO Da-quan, LIU Jia-can, LI Jie, et al. 2003. Seismic activities and structures of the Liu'an-Huoshan seismic risk area［J］. Seismology and Geology, 25(2):211-219(in Chinese).
姚大全, 刘加灿, 叶峰, 等. 2004. 地震韵律的研究方法初探:以合肥市断层活动习性综合探讨为例［J］. 地球物理学进展, 19(3):663-671. YAO Da-quan, LIU Jia-can, YE Feng, et al. 2004. Preliminary research method of seismic rhythms-Taking synthesized research of active behavior for Hefei' s active faults as an example［J］. Progress in Geophysics, 19(3):663-671(in Chinese).
曾华霖. 2005. 重力场与重力勘探［M］. 北京:地质出版社. ZENG Hua-lin. 2005. Gravity Field and Gravity Prospecting［M］. Geological Publishing House, Beijing(in Chinese).
张交东, 杨长春, 刘成斋, 等. 2010. 郯庐断裂南段走滑和伸展断裂的深部结构及位置关系［J］. 地球物理学报, 53(4):864-873. ZHANG Jiao-dong, YANG Chang-chun, LIU Cheng-zhai, et al. 2010. The deep structures of strike-slip and extension faults and their composite relationship in the southern segment of Tanlu fault zone［J］. Chinese J Geophys, 53(4):864-873(in Chinese).
张毅, 翟洪涛, 顾春雷, 等. 2011. 郯庐断裂带中南段重磁综合剖面探测研究［J］. 国际地震动态, (3):10-11. ZHANG Yi, ZHAI Hong-tao, GU Chun-lei, et al. 2011. Profiles study of gravitative-magnetic comprehensive survey in middle-south segment of the Tanlu fault zone［J］. Recent Developments in World Seismology, (3):10-11(in Chinese).
朱光, 王道轩, 刘国生, 等. 2001. 郯庐断裂带的伸展活动及其动力学背景［J］. 地质科学, 36(3):269-278. ZHU Guang, WANG Dao-xuan, LIU Guo-sheng, et al. 2001. Extensional activities along the Tanlu faule zone and its geodynamic setting［J］. Chinese Journal of Geology, 36(3):269-278(in Chinese).
朱光, 王道轩, 刘国生, 等. 2004. 郯庐断裂带的演化及其对西太平洋板块运动的响应［J］. 地质科学, 39(1):36-49. ZHU Guang, WAND Dou-xuan, LIU Guo-sheng, et al. 2004. Evolution of the Tanlu fault zone and its responses to plate movements in west Pacific Basin［J］. Chinese Journal of Geology, 39(1):36-49(in Chinese).
朱介寿, 蔡学林, 曹家敏, 等. 2005. 中国华南及东海地区岩石圈三维结构及演化［M］. 北京:地质出版社. ZHU Jie-shou, CAI Xue-lin, CAO Jia-min, et al. 2005. The Three-Dimensional Structure of Lithosphere and Its Evolution in South China and East China Sea［M］. Geological Publishing House, Beijing(in Chinese).
Berteussen K A. 1977. Moho depth determinations based on spectral-ratio analysis of NORSAR long-period P waves［J］. Physics of the Earth and Planetary Interiors, 15(1):13-27.
Jiang W L, Wang X, Tian T, et al. 2014. Detailed crustal structure of the North China and its implication for seismicity［J］. Journal of Asian Earth Sciences, 81:53-64.
Jiang W L, Zhang J F, Tian T, et al. 2012. Crustal structure of Chuan-Dian region derived from gravity data and its tectonic implications［J］. Physics of the Earth and Planetary Interiors, 212:76-87.
Mallat S. 1989. A theory for multi-resolution signal decomposition:The wavelet representation［J］. IEEE Transactions on Pattern Analysis and Machine Intelligence, 11(7):674-693.
Parker R L. 1973. The rapid calculation of potential anomalies［J］. Geophysical Journal International, 31(4):447-455.
Spector A, Grant F S. 1970. Statistical models for interpreting aeromagnetic data［J］. Geophysics, 35(2):293-302.
Xu J W, Zhu G, Tong W X, et al. 1987. Formation and evolution of the Tancheng-Lujiang wrench fault system:A major shear system to the northwest of the Pacific Ocean［J］. Tectonophysics, 134(4):273-310.
Yin A, Nie S Y. 1993. An indentation model for the North and South China collision and the development of the Tan-Lu and Honam fault systems, eastern Asia［J］. Tectonics, 12(4):801-813.
Zhu G, liu G S, Niu M L, et al. 2009. Syn-collisional transform faulting of the Tan-Lu fault zone, East China［J］. International Journal of Earth Sciences, 98(1):135-155.

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[10]	XIE Chao, ZHOU Ben-gang, LI Zheng-fang. GEOMORPHIC FEATURES OF EASTERN HIMALAYAN SYNTAXIS AND ITS TECTONIC IMPLICATIONS [J]. SEISMOLOGY AND GEOLOGY, 2017, 39(2): 276-286.
[11]	TAN Hong-bo, SHEN Chong-yang, XUAN Song-bai, WU Gui-ju, YANG Guang-liang, WANG Jian. THE SEISMOGENIC ENVIRONMENT ANALYSIS OF LUDIAN M_S6.5 EARTHQUAKE USING GRAVITY DATA [J]. SEISMOLOGY AND GEOLOGY, 2017, 39(2): 356-373.
[12]	WANG Hui-lin, XU Xiao-feng, ZHOU Long-quan, ZHANG Xiao-dong, SHEN Fan-lua, LI Zhi-xiong, ZHAN Wei. CRUSTAL Q_s TOMOGRAPHY IN HAINAN ISLAND AND ADJACENT REGIONS [J]. SEISMOLOGY AND GEOLOGY, 2016, 38(3): 631-645.
[13]	WANG Xin, ZHANG Jing-fa, FU Ping-jie, GAO Min. DEEP STRUCTURES OF YISHU FAULT ZONE DERIVED FROM GRAVITY DATA [J]. SEISMOLOGY AND GEOLOGY, 2015, 37(3): 731-747.
[14]	LIU Guo-cheng, QIN Zun-li, HE Ri-zheng, WU Yan-gang. ISOSTATIC GRAVITY ANOMALY AND DENSITY STRUCTURE BENEATH POTASSIC VOLCANIC REGION IN NORTHERN TIBET [J]. SEISMOLOGY AND GEOLOGY, 2013, 35(4): 817-832.
[15]	GAO Guo-ying, NIE Xiao-hong, LONG Hai-ying. DISCUSSION ON THE CHARACTERISTICS OF REGIONAL TECTONIC STRESS FIELD OF XINJIANG FROM 2003 TO 2008 [J]. SEISMOLOGY AND GEOLOGY, 2010, 32(1): 70-79.