Three-dimensional P-wave velocity structure tomography in the source area of Rushan earthquake swarm
-
摘要: 基于山东省地震台网固定台站及乳山台阵的流动观测资料，利用双差层析成像方法对乳山震群及附近地区地壳浅层15 km深度以内的三维P波速度结构进行了反演。结果显示，研究区内的隆起区（如垛崮山、大孤山）及海洋所镇附近的超高压岩体为高速区，连接两者之间的白沙滩呈低速特征，乳山序列即发生在高、低速过渡带偏高速区的一侧。速度结构剖面显示，乳山序列下方的地壳内存在明显的类椭圆状的相对低速区域，序列活动基本处于该低速区域与第四纪盖层之间的高速夹层。综合考虑序列展布、区域地质构造及高低速岩体间的位置关系，本文推测在区域应力调整背景下，局部介质的不稳定性在乳山序列的发生过程中起主要作用。Abstract: Based on the observation data recorded by the fixed stations in Shandong seismic network and by portable stations of Rushan array, the three-dimensional P-wave velocity structure of the shallow crust within 15 km depth in the source region of Rushan earthquake swarm and its surrounding areas is studied by using the double difference tomographic method. The results show that the uplifted area （such as Duogushan and Dagushan） and the ultrahigh pressure rock mass near the Haiyangsuo town are high-velocity areas, and the white sand beach between the two areas is characterized by low-velocity, the Rushan sequence occurred on the side of the high-velocity of the high-low velocity transitional zone. The velocity structure section shows that the crust beneath the Rushan sequence has an obvious ellipse-like relatively low velocity region, the sequence is basically located in the high-velocity interlayer between the low-velocity area and the Quaternary cap rock. Considering the sequence distribution, regional geological structure and the position relationship between high and low velocity rock masses, it is speculated that under the background of regional stress adjustment, the instability of local medium plays an important role in the occurrence of Rushan earthquake sequence.
-
-
![]()
图 1 胶南—威海造山带地质略图（a）和乳山地区岩体划分略图（b） ［ 据翟明国等（2000），杨喜安等（2011）和曲均浩等（2019）修改 ］
Figure 1. Geological map of Jiaonan-Weihai orogenic belt （a） and rock masses in and around Rushan area （b） （revised from Zhai et al，1998；Yang et al，2011；Qu et al，2019）
![]()
图 2 地震与台站间的射线分布（a）和乳山台阵分布 （b）
Figure 2. Distributions of rays between earthquakes and stations （a） and Rushan array （b）
![]()
图 4 阻尼因子和光滑因子的权衡曲线
Figure 4. Trade-off curves of damping and smoothing weight parameters
![]()
图 6 P波解的评价（不同深度h的网格内偏导权重总值DWS分布）
Figure 6. Evaluation of P-wave solution （DWS distribution at different depths）
![]()
图 7 定位前后地震走时残差均方根直方图
Figure 7. Histograms of travel time residual RMS before （a） and after （b） relocation
![]()
图 9 垂向剖面的P波速度结构及震群分布
Figure 9. Vertical cross-sections of P-waves velocity structure and distribution of earthquakes
![]()
图 8 研究区不同深度h的水平层析成像结果
Figure 8. Horizontal slices of velocity at different depths by tomoDD in the study area
（a） h＝1 km； （b） h＝4 km；（c） h＝7 km；（d） h＝10 km；（e） h＝15 km
表 1 乳山震群及附近地区P波初始速度模型（潘素珍等，2015）
Table 1 Initial P wave velocity structure in Rushan area and its vicinity （Pan et al，2015）
上界面深度/km vP/（km·s−1） 上界面深度/km vP/（km·s−1） 0 4.35 15 6.27 4 5.24 20 6.45 7 5.90 25 6.61 10 6.14 30 6.75 
下载: 导出CSV
-
蔡克明. 1987. 1046年山东登州地震应在何处[J]. 地震地质,9(3):38–42. Cai K M. 1987. Where should the Dengzhou earthquake in 1046 be located[J]. Seismology and Geology,9(3):38–42 (in Chinese).
陈仁旭,尹壮壮,夏春鹏. 2019. 大别—苏鲁造山带橄榄岩记录的碰撞造山过程中地幔楔的地壳交代作用[J]. 矿物岩石地球化学通报,38(3):459–484. Chen R X,Yin Z Z,Xia C P. 2019. Crustal metasomatism of mantle wedge during collisional orogeny:Insights from orogenic peridotites in the Dabie-Sulu orogenic belt[J]. Bulletin of Mineralogy,Petrology and Geochemistry,38(3):459–484 (in Chinese).
陈为涛,甘卫军,肖根如,梁诗明,盛传贞. 2012. 3·11日本大地震对中国东北部地区地壳形变态势的影响[J]. 地震地质,34(3):425–439. doi: 10.3969/j.issn.0253-4967.2012.03.004 Chen W T,Gan W J,Xiao G R,Liang S M,Sheng C Z. 2012. The impact of 2011 Tohoku-Oki earthquake in Japan on crustal deformation of northeastern region in China[J]. Seismology and Geology,34(3):425–439 (in Chinese).
迟镇乐,周翠英,蔡克明. 1992. 1939年山东乳山地震的再研究[J]. 地震学刊,12(2):36–39. Chi Z L,Zhou C Y,Cai K M. 1992. A further study of the 1939 Rushan earthquake in Shandong Province[J]. Journal of Seismology,12(2):36–39 (in Chinese).
邓文泽,陈九辉,郭飚,刘启元,李顺成,李昱,尹昕忠,齐少华. 2014. 龙门山断裂带精细速度结构的双差层析成像研究[J]. 地球物理学报,57(4):1101–1110. doi: 10.6038/cjg20140408 Deng W Z,Chen J H,Guo B,Liu Q Y,Li S C,Li Y,Yin X Z,Qi S H. 2014. Fine velocity structure of the Longmenshan fault zone by double-difference tomography[J]. Chinese Journal of Geophysics,57(4):1101–1110 (in Chinese).
郭敬辉,陈福坤,张晓曼,Siebel W,翟明国. 2005. 苏鲁超高压带北部中生代岩浆侵入活动与同碰撞—碰撞后构造过程:锆石U-Pb年代学[J]. 岩石学报,21(4):1281–1301. doi: 10.3321/j.issn:1000-0569.2005.04.025 Guo J H,Chen F K,Zhang X M,Siebel W,Zhai M G. 2005. Evolution of syn- to post-collisional magmatism from north Sulu UHP belt,eastern China:Zircon U-Pb geochronology[J]. Acta Petrologica Sinica,21(4):1281–1301 (in Chinese).
李三忠,刘建忠,赵国春,吴福元,韩宗珠,杨中柱. 2004. 华北克拉通东部地块中生代变形的关键时限及其对构造的制约:以胶辽地区为例[J]. 岩石学报,20(3):633–646. doi: 10.3969/j.issn.1000-0569.2004.03.027 Li S Z,Liu J Z,Zhao G C,Wu F Y,Han Z Z,Yang Z Z. 2004. Key geochronology of Mesozoic deformation in the eastern block of the North China Craton and its constraints on regional tectonics:A case of Jiaodong and Liaodong peninsula[J]. Acta Petrologica Sinica,20(3):633–646 (in Chinese).
李增达,于晓飞,王全明,杜泽中,曹强,师明元,王然. 2018. 胶东三佛山花岗岩的成因:成岩物理化学条件、锆石U-Pb年代学及Sr-Nd同位素约束[J]. 岩石学报,34(2):447–468. Li Z D,Yu X F,Wang Q M,Du Z Z,Cao Q,Shi M Y,Wang R. 2018. Petrogenesis of Sanfoshan granite,Jiaodong:Diagenetic physical and chemical conditions,zircon U-Pb geochronology and Sr-Nd isotope constraints[J]. Acta Petrologica Sinica,34(2):447–468 (in Chinese).
刘方斌,曲均浩,李亚军,范晓易,苗庆杰. 2018. 山东乳山地震序列震源机制解一致性参数特征[J]. 地震地质,40(5):1086–1099. Liu F B,Qu J H,Li Y J,Fan X Y,Miao Q J. 2018. Research on characteristics of the focal mechanism solutions consistency of Rushan earthquake sequence,Shandong Province[J]. Seismology and Geology,40(5):1086–1099 (in Chinese).
罗炬,李志海,王海涛. 2011. 地震层析成像研究方法综述[J]. 内陆地震,25(4):311–320. doi: 10.3969/j.issn.1001-8956.2011.04.004 Luo J,Li Z H,Wang H H. 2011. Survey on seismic tomography research method[J]. Inland Earthquake,25(4):311–320 (in Chinese).
马杏垣. 1989. 江苏响水至内蒙满都拉地学断面南北两段的地质观察[J]. 地球科学:中国地质大学学报,14(1):1–7. Ma X Y. 1989. Geological observations along the northern and southern parts of the geoscience transect from Xiangshui,Jiangsu to Mandula,Inner Mongolia[J]. Earth Science:Journal of China University of Geosciences,14(1):1–7 (in Chinese).
潘素珍,王夫运,郑彦鹏,段玉玲,刘兰,邓晓果,宋向辉,孙一男,马策军,李怡青. 2015. 胶东半岛地壳速度结构及其构造意义[J]. 地球物理学报,58(9):3251–3263. doi: 10.6038/cjg20150920 Pan S Z,Wang F Y,Zheng Y P,Duan Y L,Liu L,Deng X G,Song X H,Sun Y N,Ma C J,Li Y Q. 2015. Crustal velocity structure beneath Jiaodong peninsula and its tectonic implications[J]. Chinese Journal of Geophysics,58(9):3251–3263 (in Chinese).
曲均浩,王长在,刘方斌,周少辉,郑建常,李新凤,张芹. 2019. 乳山序列地震分布与震源区速度结构的关系[J]. 地震地质,41(1):99–118. doi: 10.3969/j.issn.0253-4967.2019.01.007 Qu J H,Wang C Z,Liu F B,Zhou S H,Zheng J C,Li X F,Zhang Q. 2019. Study on relationship between seismic distribution of Rushan sequence and velocity structure[J]. Seismology and Geology,41(1):99–118 (in Chinese).
谭成轩,胡秋韵,张鹏,丰成君,秦向辉. 2015. 日本MW9.0级大地震前后华北和东北地区现今构造应力作用调整过程与研究意义探讨[J]. 地学前缘,22(1):345–359. Tan C X,Hu Q Y,Zhang P,Feng C J,Qin X H. 2015. Present tectonic stress adjustment process before and after Japan MW9.0 earthquake in North and Northeast China and its research significance[J]. Earth Science Frontiers,22(1):345–359 (in Chinese).
王霞,宋美琴,王亮,李宏伟,吴昊昱,罗勇. 2015. 口泉断裂及其邻近地区的地壳速度结构[J]. 地震地质,37(4):939–952. doi: 10.3969/j.issn.0253-4967.2015.04.001 Wang X,Song M Q,Wang L,Li H W,Wu H Y,Luo Y. 2015. Study on crustal velocity structure beneath Kouquan fault and adjacent area[J]. Seismology and Geology,37(4):939–952 (in Chinese).
王小娜,于湘伟,章文波. 2015. 芦山震区地壳三维P波速度精细结构及地震重定位研究[J]. 地球物理学报,58(4):1179–1193. doi: 10.6038/cjg20150408 Wang X N,Yu X W,Zhang W B. 2015. 3D P-wave velocity structure of the crust and relocation of earthquakes in the Lushan source area[J]. Chinese Journal of Geophysics,58(4):1179–1193 (in Chinese).
王亚强. 2013. 改进的阻尼最小二乘层析算法及影响因素分析[D]. 秦皇岛: 燕山大学: 23−25. Wang Y Q. 2013. Improved Damped Least Squares Tomograph Algorithms and Analysis of Influencing Fators[D]. Qinhuangdao: Yanshan University: 23−25 （in Chinese）.
吴福元,葛文春,孙德有,郭春丽. 2003. 中国东部岩石圈减薄研究中的几个问题[J]. 地学前缘,10(3):51–60. doi: 10.3321/j.issn:1005-2321.2003.03.004 Wu F Y,Ge W C,Sun D Y,Guo C L. 2003. Discussions on the lithospheric thinning in eastern China[J]. Earth Science Frontiers,10(3):51–60 (in Chinese).
肖卓,高原. 2017. 利用双差成像方法反演青藏高原东北缘及其邻区地壳速度结构[J]. 地球物理学报,60(6):2213–2225. doi: 10.6038/cjg20170615 Xiao Z,Gao Y. 2017. Crustal velocity structure beneath the northeastern Tibetan Plateau and adjacent regions derived from double difference tomography[J]. Chinese Journal of Geophysics,60(6):2213–2225 (in Chinese).
辛魏. 2017. 山东省乳山市东峒岭金矿床地质特征研究[J]. 世界有色金属,(14):192–193. Xin W. 2017. Study on geological characteristics of Dongtongling gold deposit in Rushan city of Shandong Province[J]. World Nonferrous Metals,(14):192–193 (in Chinese).
杨喜安,赵国春,宋玉波,田飞,董汉文,高建伟. 2011. 胶东牟平—乳山成矿带拆离断层控矿特征及找矿方向[J]. 大地构造与成矿学,35(3):339–347. doi: 10.3969/j.issn.1001-1552.2011.03.002 Yang X A,Zhao G C,Song Y B,Tian F,Dong H W,Gao J W. 2011. Characteristics of ore-controlling detachment fault and future prospecting in the Muping-Rushan metallogenic belt,eastern Shandong Province[J]. Geotectonica et Metallogenia,35(3):339–347 (in Chinese).
翟明国,郭敬辉,王清晨,叶凯,从柏林,刘文军. 2000. 苏鲁变质带北部的岩石构造单元及结晶块体推覆构造[J]. 地质科学,35(1):16–26. doi: 10.3321/j.issn:0563-5020.2000.01.002 Zhai M G,Guo J H,Wang Q C,Ye K,Cong B L,Liu W J. 1998. Division of petrological-tectonic units in the northern Sulu ultra-high pressure zone:An example of thick-skin thrust of crystalline units[J]. Scientia Geologica Sinica,7(4):539–549.
张长厚,宋鸿林. 1996. 燕山板内造山带中生代逆冲构造样式及形成过程[J]. 地质力学学报,2(3):21–22. Zhang C H,Song H L. 1996. Mesozoic thrust structural style and formation process of the intraplate orogenic belt in Yanshan[J]. Journal of Geomechanics,2(3):21–22 (in Chinese).
张宏远,侯泉林,曹代勇. 2006. 胶东东部中生代逆冲推覆构造研究[J]. 中国科学:D辑,36(6):497–506. Zhang H Y,Hou Q L,Cao D Y. 2006. Study of thrust and nappe tectonics in the eastern Jiaodong peninsula,China[J]. Science in China:Series D,50(2):161–171.
张华锋,李胜荣,翟国明,郭敬辉. 2006. 胶东半岛早白垩世地壳隆升剥蚀及其动力学意义[J]. 岩石学报,22(2):285–295. doi: 10.3321/j.issn:1000-0569.2006.02.003 Zhang H F,Li S R,Zhai G M,Guo J H. 2006. Crust uplift and its implications in the Jiaodong peninsula,eastern China[J]. Acta Petrologica Sinica,22(2):285–295 (in Chinese).
郑建常,曲利,曲均浩,胡旭辉,李冬梅. 2015. 乳山震群大小台网地震定位的对比研究[J]. 地震地质,37(4):953–965. doi: 10.3969/j.issn.0253-4967.2015.04.002 Zheng J C,Qu L,Qu J H,Hu X H,Li D M. 2015. Comparison of locations of Rushan earthquake swarm from large and small network[J]. Seismology and Geology,37(4):953–965 (in Chinese).
郑永飞. 2004. 深俯冲大陆板块折返过程中的流体活动[J]. 科学通报,49(10):917–929. doi: 10.3321/j.issn:0023-074X.2004.10.002 Zheng Y F. 2004. Fluid activity during exhumation of deep-subducted continental plate[J]. Chinese Science Bulletin,49(10):985–998. doi: 10.1007/BF03184025
周焕鹏,侯海峰,李霞. 2005. 2005年1月18日乳山ML4.3地震序列[J]. 国际地震动态,(10):9–14. doi: 10.3969/j.issn.0253-4975.2005.10.002 Zhou H P,Hou H F,Li X. 2005. Rushan ML4.3 earthquake sequence on January 18,2005[J]. Recent Developments in World Seismology,(10):9–14 (in Chinese).
Chen J F,Xie Z,Li H M,Zhang X D,Zhou T X,Park Y S,Ahn K S,Chen D G,Zhang X. 2003. U-Pb zircon ages for a collision-related K-rich complex at Shidao in the Sulu ultrahigh pressure terrane,China[J]. Geochem J,37(1):35–46. doi: 10.2343/geochemj.37.35
Eberhart-Phillips D. 1986. Three-dimensional velocity structure in northern California Coast Ranges from inversion of local earthquake arrival times[J]. Bull Seismol Soc Am,76(4):1025–1052.
Golub G H,Reinsch C. 1970. Singular value decomposition and least squares solutions[J]. Numer Math,14(5):403–420. doi: 10.1007/BF02163027
Lin G,Thurber C H,Zhang H,Hauksson E,Shearer P M,Waldhauser F,Brocher T M,Hardebeck J. 2010. A California statewide three-dimensional seismic velocity model from both absolute and differential times[J]. Bull Seismol Soc Am,100(1):225–240. doi: 10.1785/0120090028
Okada T,Hasegawa A,Suganomata J,Umino N,Zhang H J,Thurber C H. 2007. Imaging the heterogeneous source area of the 2003 M6.4 northern Miyagi earthquake,NE Japan,by double-difference tomography[J]. Tectonophysics,430(1/2/3/4):67–81.
Paige C C,Saunders M A. 1982. LSQR:Sparse linear equations and least squares problems[J]. AMC Trans Math,8(1):195–209.
Panayotopoulos Y,Hirata N,Sato H,Kato A,Imanishi K,Kuwahara Y,Cho I,Takeda T,Asano Y. 2014. Investigating the role of the Itoigawa-Shizuoka tectonic line towards the evolution of the northern Fossa Magna rift basin[J]. Tectonophysics,615/616:12–26. doi: 10.1016/j.tecto.2013.12.014
Thurber C,Eberhart-Phillips D. 1999. Local earthquake tomography with flexible gridding[J]. Comput Geosci,25(7):809–818. doi: 10.1016/S0098-3004(99)00007-2
Thurber C H,Brocher T M,Zhang H J,Langenheim V E. 2007. Three-dimensional P wave velocity model for the San Francisco Bay region,California[J]. J Geophys Res:Solid Earth,112(B7):B07313. doi: 10.1029/2006JB004682
Waldhauser F,Ellsworth W L. 2000. A double-difference earthquake location algorithm:Method and application to the northern Hayward fault,California[J]. Bull Seismol Soc Am,90(6):1353–1368. doi: 10.1785/0120000006
Zhang H J,Thurber C H. 2003. Double-difference tomography:The method and its application to the Hayward fault,California[J]. Bull Seismol Soc Am,93(5):1877–1889.
Zhang H J,Thurber C. 2006. Development and applications of double-difference seismic tomography[J]. Pure Appl Geophys,163(2/3):273–403.
Zhao D P,Hasegawa A,Horiuchi S. 1992. Tomographic imaging of P and S wave velocity structure beneath northeastern Japan[J]. J Geophys Res:Solid Earth,97(B13):19909–19928. doi: 10.1029/92JB00603
-
期刊类型引用(4)
1. 陈长龙，刘启方. 三种非线性时变识别方法的对比研究——以2021年日本福岛地震为例. 地震工程学报. 2023(02): 372-381 . 
百度学术
2. 吴双兰，野津厚，長坂陽介. 2021年日本福岛县冲地震的震源破裂过程分析——基于采用经验格林函数方法的波形反演. 世界地震工程. 2021(02): 1-12 . 百度学术
3. 徐志国，梁姗姗，张广伟，梁建宏，邹立晔，李旭茂，陈彦含. 2021年5月22日青海玛多M_S7.4地震发震构造分析. 地球物理学报. 2021(08): 2657-2670 . 百度学术
4. 张喆，许力生. 2021年青海玛多M_W7.5地震矩心矩张量解. 地震学报. 2021(03): 387-391 . 本站查看
其他类型引用(1)
计量
- 文章访问数: 1269
- HTML全文浏览量: 583
- PDF下载量: 46
- 被引次数: 5
