Journal of Jilin University(Earth Science Edition) ›› 2021, Vol. 51 ›› Issue (3): 898-908.doi: 10.13278/j.cnki.jjuese.20200040

Previous Articles     Next Articles

Lower Crust and Moho Structure of the Eastern Segment of the Centeral Asian Orogenic Belt Revealed by Large Dynamite Shots of Deep Seismic Reflection Profile: Data Processing and Preliminary Interpretation

Tan Xiaomiao1, Gao Rui1,2,3,4, Wang Haiyan2, Hou Hesheng3, Li Hongqiang3, Kuang Zhaoyang5   

  1. 1. School of Earth Sciences and Engineering, Sun Yat-Sen University, Guangzhou 510275, China;
    2. Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China;
    3. Chinese Academy of Geological Sciences, Beijing 100037, China;
    4. College of GeoExploration Science and Technology, Jilin University, Changchun 130026, China;
    5. SINOPEC Geophysical Corporation Huadong Bureau, Nanjing 210007, China
  • Received:2020-02-24 Online:2021-05-26 Published:2021-06-07
  • Supported by:
    Supported by the National Key Research and Development Program of China (2017YFC0601301,2017YFC0601300),the Project of China Geological Survey (DD20160207,DD20190010),the National Natural Science Foundation of China (41430213,41590863) and the Pearl River Talent Program (2017ZT07Z066)

Abstract: By using the large dynamite shots data of deep seismic reflection, the key information of the structure details of the lower crust and Moho as well as their lateral variations can be obtained accurately, and the tectonic pattern and deep process of the lithospheric scale can be revealed. The eastern segment of the Central Asian orogenic belt (CAOB) is in the superimposed area of the three major tectonic domains, the Paleo-Asian Ocean, the Mongolian-Okhostsk Ocean and the Paleo-Pacific Ocean. The demise process of the ocean was recorded by its lithospheric structure, especially the demise of the Paleo-Asian Ocean and the deep process of continental accretion. In this paper, 24 large dynamite shots data and two medium shots data from the deep seismic reflection profile traversing the eastern segment of the CAOB (from East Ujimqin Banner to Naiman Banner, about 400 km long) are selected for data processing, and one large dynamite shots single profile of near-vertical reflection is obtained. The fine structure of the lower crust and Moho discontinuity beneath the eastern segment of the CAOB are revealed, and the polarity of the demise of the Paleo-Asian Ocean and the deep accretionary orogeny processing of the CAOB are described as follows: The Xar-Moron suture and the Hegenshan suture constitute double sutures related to the demise of the Paleo-Asian Ocean: The Paleo-Asian Ocean plate below the Xar-Moron suture may be primarily subducted southward; While the Paleo-Asian Ocean plate below the Hegenshan suture may be primarily subducted northward, and the latter is larger than the former in scale. Between the two sutures, several large-scale arc-shaped reflections are presumed to be residual micro-blocks in the ocean. They were spliced together during the demise of the Paleo-Asian Ocean, after collision, compression, and post-orogenic extension. A near-horizontal Moho structure is located at around TWT 12 s (about 36 km thick), which is relatively flat along the profile. The flat Moho should be related to the post-orogenic extension of the crust.

Key words: deep seismic reflection profile, near-vertical reflection, large dynamite shots, the Central Asian orogenic belt, lower crust, Moho discontinuity, the demise of Paleo-Asian Ocean

CLC Number: 

  • P631.4
[1] 王海燕, 高锐, 卢占武, 等. 深地震反射剖面揭露大陆岩石圈精细结构[J]. 地质学报, 2010, 84(6): 818-839. Wang Haiyan, Gao Rui, Lu Zhanwu, et al. Fine Structure of the Continental Lithosphere Circle Revealed by Deep Seismic Reflection Profile[J]. Acta Geologica Sinica, 2010, 84(6): 818-839.
[2] Brown L, Barazangi M, Kaufman S, et al. The First Decade of COCORP: 1974-1984[C]//Barazangi M, Brown L. Reflection Seismology, A Global Perspecfive: Geodynnmics Series.Washington:American Geophysical Union, 1986: 107-120.
[3] Clowes R, Cook F,Hajnal Z, et al. Canada’s LITHOPROBE Project (Collaborative, Multidisciplinary Geoscience Research Leads to New Understanding of Continental Evolution)[J]. Episodes, 1999, 22(1): 3-20.
[4] Bois C, ECORS Scientific Party. Major Geodynamic Processes Studies from the ECORS Deep Seismic Profiles in France and Adjacent Areas[J]. Tectonophysics, 1990, 173: 397-410.
[5] DEKORP Research Group. Results of Deep-Seismic Reflection Investigations in the Rhenish Massif[J]. Tectonophysics, 1990, 173: 507-515.
[6] Gao R, Cheng X Z, Wu G J. Lithospheric Structure and Geodynamic Model of the Golmud-Ejin Transect in Northern Tibet[J]. Geological Society of America Special Paper, 1999, 328: 9-17.
[7] Gao R, Huang D D, Lu D Y, et al. Deep Seismic Reflection Profile Across the Juncture Zone Between the Tarim Basin and the West Kunlun Mountains[J].Chinese Sci Bull, 2000, 45(24): 2281-2286.
[8] Gao R, Lu Z W, Klemperer S L, et al. Crustal-Scale Duplexing Beneath the Yarlung Zangbo Suture in the Western Himalaya[J]. Nat Geosci, 2016, 9: 555-560.
[9] Gao R, Hou H X, Cai X Y, et al. Fine Crustal Structure Beneath the Junction of the Southwest Tian Shan and Tarim Basin, NW China[J]. Lithosphere, 2013, 5: 382-392.
[10] 李洪强, 高锐, 王海燕, 等. 用近垂直方法提取莫霍面:以六盘山深地震反射剖面为例[J]. 地球物理学报, 2013, 56(11): 3811-3818. Li Hongqiang, Gao Rui, Wang Haiyan, et al. Extracting the Moho Structure of Liupanshan by the Method of Near Vertical Incidence[J]. Chinese Journal of Geophys, 2013, 56(11): 3811-3818.
[11] 李洪强, 高锐, 王海燕, 等. 用深反射大炮对大巴山—秦岭结合部位的地壳下部和上地幔成像[J]. 地球物理学进展, 2014, 29(1): 102-109. Li Hongqiang, Gao Rui, Wang Haiyan, et al. Imaging the Lower Crust and Upper Mantle Beneath Between Qinling and Dabashan by Big Shots from Deep Seismic Reflection in China[J]. Progress in Geophysics, 2014, 29(1): 102-109.
[12] Li H Q, Gao R, Li W H, et al. The Moho Structure Beneath the Yarlung Zangbo Suture and Its Implications: Evidence from Large Dynamite Shots[J]. Tectonophysics, 2018, 747/748: 390-701. https://doi.org/10.1016/j.tecto.2018.10.003.
[13] Clowes R, Kanasewich E, Cumming G. Deep Crustal Seismic Reflections at Near-Vertical Incidence[J]. Geophysics, 1968, 33(3): 441-451.
[14] Stern T, Henrys S, Okaya D, et al. A Seismic Reflection Image for the Base of a Tectonic Plate[J]. Nature, 2015, 518: 85-88.
[15] Li J Y. Permian Geodynamic Setting of Northeast China and Adjacent Regions: Closure of the Paleo-Asian Ocean and Subduction of the Paleo-Pacific Plate[J]. Journal of Asian Earth Sciences, 2006, 26: 207-224.
[16] Zhou J B, Wilde S A. The Crustal Accretion History and Tectonic Evolution of the NE China Segment of the Central Asian Orogenic Belt[J]. Gondwana Research, 2013, 23: 1365-1377.
[17] 张鹏辉,张小博,方慧,等. 地球物理资料揭示的嫩江—八里罕断裂中段深浅构造特征[J]. 吉林大学学报(地球科学版),2020,50(1):261-272. Zhang Penghui, Zhang Xiaobo, Fang Hui, et al. Deep and Shallow Structural Characteristics of Middle Segment of Nenjiang-Balihan Fault Based on Geophysical Data[J]. Journal of Jilin University (Earth Science Edition), 2020, 50 (1): 261-272.
[18] 谢樊, 王海燕, 侯贺晟,等.中亚造山带东段浅表构造速度结构:深地震反射剖面初至波层析成像的揭露[J].吉林大学学报(地球科学版), 2021, 51(2):584-596. Xie Fan, Wang Haiyan, Hou Hesheng,et al. Near-Surface Fine Velocity Structure in Eastern Segment of Central Asian Orogenic Belt: Revealed by First-Arrival Wave Tomography from Deep Seismic Reflection Profile[J]. Journal of Jilin University (Earth Science Edition), 2021, 51(2):584-596.
[19] 周建波, 王斌, 曾维顺, 等. 大兴安岭地区扎兰屯变质杂岩的碎屑锆石U-Pb年龄及其大地构造意义[J]. 岩石学报, 2014, 30(7): 1879-1888. Zhou Jianbo, Wang Bin, Zeng Weishun, et al. Detrital Zircon U-Pb Dating of the Zhalantun Metamorphic Complex and Its Tectonic Implications, Great Xing’an, NE China[J]. Acta Petrologica Sinica, 2014, 30(7): 1879-1888.
[20] Wu F Y, Zhao G, Wilde S A, et al. Nd Isotopic Constraints on Crustal Formation in the North China Craton[J]. Journal of Asian Earth Sciences, 2005, 24(5): 523-545.
[21] 张兴洲, 马玉霞, 迟效国, 等. 东北及内蒙古东部地区显生宙构造演化的有关问题[J]. 吉林大学学报(地球科学版), 2012, 42(5): 1269-1285. Zhang Xingzhou, Ma Yuxia, Chi Xiaoguo, et al. Discussion on Phanerozoic Tectonic Evolution in Northeastern China[J]. Journal of Jilin University(Earth Science Edition), 2012, 42(5): 1269-1285.
[22] Xu B, Zhao P, Wang Y, et al. The Pre-Devonian Tectonic Framework of Xing’an-Mongolia Orogenic Belt (XMOB) in North China[J]. Journal of Asian Earth Sciences, 2015, 97: 183-196.
[23] Liu Y J, Li W M, Feng Z Q, et al. A Review of the Paleozoic Tectonics in the Eastern Part of Central Asian Orogenic Belt[J]. Gondwana Research, 2016, 43: 123-148.
[24] 周建波, 韩杰, Wilde S A, 等. 吉林—黑龙江高压变质带的初步厘定:证据和意义[J]. 岩石学报, 2013, 29(2): 386-398. Zhou Jianbo, Han Jie, Wilde S A, et al. A Primary Study of the Jilin-Heilongjiang High-Pressure Metamorphic Belt: Evidence and Tectonic Implications[J]. Acta Petrologica Sinica, 2013, 29(2): 386-398.
[25] Wu F Y, Yang J H, Lo C H, et al. The Heilongjiang Group: A Jurassic Accretionary Complex in the Jiamusi Massif at the Western Pacific Margin of Northeastern China[J]. Island Arc, 2007, 16: 156-172.
[26] Xu B, Wang Z W, Zhang L Y, et al. The Xing-Meng Intracontinent Orogenic Belt[J]. Acta Petrologica Sinica, 2018, 34(10): 2819-2844.
[27] Song S G, Wang M M, Xu X, et al. Ophiolites in the Xing’an-Inner Mongolia Accretionary Belt of the CAOB: Implications for Two Cycles of Seafloor Spreading and Accretionary Orogenic Events[J]. Tectonics, 2015, 34: 2221-2248.
[28] Xiao W J, Windley B F, Sun S, et al. A Tale of Amalgamation of Three Permo-Triassic Collage Systems in Central Asia: Oroclines, Sutures, and Terminal Accretion[J]. Annual Review of Earth and Planetary Sciences, 2015, 43(1): 477-507.
[29] 唐克东. 中朝陆台北侧褶皱带构造发展的几个问题[J]. 现代地质, 1989, 2: 195-204. Tang Kedong. On Tectonic Development of the Fold Belts in the North Margin of Sino-Korean Platform[J]. Geoscience, 1989, 2: 195-204.
[30] Sengör A M C, Natal’in B A, Burtman V S. Evolution of the Altaid Tectonic Collage and Paleozoic Crustal Growth in Eurasia[J]. Nature, 1993, 364: 209-307.
[31] Sengör A M C, Natal’in B A. Paleotectonics of Asia: Fragments of a Synthesis[C]//Yin A, Harrison M. The Tectonic Evolution of Asia. Cambridge: Cambridge University Press, 1996: 486-640.
[32] Xiao W J, Windley B F, Hao J, et al. Accretion Leading to Collision and the Permian Solonker Suture, Inner Mongolia, China: Termination of the Centeral Asian Orogenic Belt[J]. Tectonics, 2003, 22: 1069-1089.
[33] 张兴洲, 杨宝俊, 吴福元, 等. 中国兴蒙—吉黑地区岩石圈结构基本特征[J].中国地质,2006, 33(4): 816-823. Zhang Xingzhou, Yang Baojun, Wu Fuyuan, et al. The Lithosphere Structure in the Hingmong-Jihei(Hinggan-Mongolia-Jilin-Heilongjiang)Region, Northeastern China[J]. Geology in China, 2006, 33(4): 816-823.
[34] 刘永江, 张兴洲, 金巍, 等. 东北地区晚古生代区域构造演化[J]. 中国地质, 2010, 37(4): 943-951. Liu Yongjiang, Zhang Xingzhou, Jin Wei, et al. Late Paleozoic Tectonic Evolution in Northeast China[J]. Geology in China, 2010, 37(4): 943-951.
[35] 周建波, 曾维顺, 曹嘉麟, 等. 中国东北地区的构造格局与演化: 从500Ma到180Ma[J]. 吉林大学学报(地球科学版), 2012, 42(5): 1298-1316, 1329. Zhou Jianbo, Zeng Weishun, Cao Jialin, et al. The Tectonic Framework and Evolution of the NE China: from ~500Ma to ~180Ma[J]. Journal of Jilin University(Earth Science Edition), 2012, 42(5): 1298-1316, 1329.
[36] Clowes R, Baird D, Dehler S. Crustal Structure of the Cascadia Subduction Zone, Southwestern British Columbia, from Potential Field and Seismic Studies[J]. Canadian Journal of Earth Sciences, 2011, 34(3): 317-335.
[37] Guo X Y, Li W H, Gao R, et al. Nonuniform Subduction of the Indian Crust Beneath the Himalayas[J]. Scientific Reports,2017,7(1): 12497.
Viewed
Full text


Abstract

Cited

  Shared   
  Discussed   
[1] LI Chun-bai,ZHANG Xin-tao,LIU Li,REN Yan-guang,MENG Peng. The Thermal Fluid Activities and Their Modification on Volcaniclastic Rock in Budate Group-An Example from the Beier Sag of Hailaer Basin[J]. J4, 2006, 36(02): 221 -0226 .
[2] ZOU Xin-ning,SUN Wei,ZHANG Meng-bo,WAN Yu-jun. The Application of Seismic Attributes Analysis to Lithologic Gas Reservoir Description[J]. J4, 2006, 36(02): 289 -0294 .
[3] GUO Hong-jin, LI Yong, ZHONG Jian-hua, WANG Hai-qiao. Carbonate Reservoir Properties in Member 1 of Shahejie Formation of Paleogene in the Dongxin Oilfield, Shandong Province[J]. J4, 2006, 36(03): 351 -357 .
[4] DU Ye-bo,JI Han-cheng,ZHU Xiao-min. Research on the Diagenetic Facies of the Upper Triassic Xujiahe Formation in the Western Sichuan Foreland Basin[J]. J4, 2006, 36(03): 358 -364 .
[5] LIU Jia-jun, LI Zhi-ming,LIU Jian-ming,WANG Jian-ping,FENG Cai-xia, LU Wen-quan. Mineralogy of the Stibnite-Antimonselite Series in the Nature[J]. J4, 2005, 35(05): 545 -553 .
[6] SU Ji-jun, YIN Kun, GUO Tong-tong. Optimization of the JointThread of Diamond WireLine Coring Drill Pipe[J]. J4, 2005, 35(05): 677 -680 .
[7] TANG Jian-sheng, XIA Ri-yuan, ZOU Sheng-zhang, LIANG Bin. Characteristics of Karst Medium System and Its Hydrogeologic Effect in the South Tianshan, Xinjiang[J]. J4, 2005, 35(04): 481 -0486 .
[8] XIONG Bin. Inverse Spline Interpolation for the Calculation of All-Time Resistivity for the Large-Loop Transient Electromagnetic Method[J]. J4, 2005, 35(04): 515 -0519 .
[9] DU Chun-guo, ZOU Hua-yao, SHAO Zhen-jun,ZHANG Jun. Formation Mechanism and Mode of Sand Lens Reservoirs[J]. J4, 2006, 36(03): 370 -376 .
[10] XU Sheng-wei,WANG Ming-chang,BAI Ya-hui,ZHANG Xue-ming. A Study and Implementation of the Distributed Publication Service of Massive Imagery Data Based on J2EE[J]. J4, 2006, 36(03): 491 -496 .