热带海洋学报 ›› 2021, Vol. 40 ›› Issue (5): 111-122.doi: 10.11978/2020131CSTR: 32234.14.2020131
苏晓康1,3(), 赵明辉1,2,3(
), 李子正1,3, 袁野1,3, 王星月1,3, 程锦辉1,3, 张佳政1,2
收稿日期:
2020-11-10
修回日期:
2021-01-04
出版日期:
2021-09-10
发布日期:
2021-01-08
通讯作者:
赵明辉
作者简介:
苏晓康(1995—), 男, 河南省开封市人, 硕士研究生, 研究方向为海洋地球物理。email: 基金资助:
SU Xiaokang1,3(), ZHAO Minghui1,2,3(
), LI Zizheng1,3, YUAN Ye1,3, WANG Xingyue1,3, CHENG Jinhui1,3, ZHANG Jiazheng1,2
Received:
2020-11-10
Revised:
2021-01-04
Online:
2021-09-10
Published:
2021-01-08
Contact:
ZHAO Minghui
Supported by:
摘要:
南海北部陆缘洋陆转换带实施的OBS2018-H2测线的地壳速度结构, 将为探讨南海张裂-破裂机制提供重要证据。文章介绍了OBS2018-H2测线前期数据处理流程, 包括多道反射地震数据处理、海底地震仪OBS (Ocean Bottom Seismometer)数据格式转换、炮点和OBS位置校正, 以及OBS震相的初步识别, 并对地壳结构进行了初步分析。结果表明: 炮点和OBS位置校正效果良好; 多道反射地震数据为建立初始速度模型提供了良好约束; OBS综合地震剖面识别了多组清晰的P波震相, 包括Pw、Pg、PmP和Pn震相。根据测线西侧OBS36、OBS37两台站的震相分布特征初步估算台站下方地壳厚度约为6~7km, 与根据多道地震剖面LW3的双程走时估算的厚度6~9km大致相符。
中图分类号:
苏晓康, 赵明辉, 李子正, 袁野, 王星月, 程锦辉, 张佳政. 南海北部陆缘OBS2018-H2测线地壳结构初步结果*[J]. 热带海洋学报, 2021, 40(5): 111-122.
SU Xiaokang, ZHAO Minghui, LI Zizheng, YUAN Ye, WANG Xingyue, CHENG Jinhui, ZHANG Jiazheng. Preliminary results of the crustal structure along OBS2018-H2 in the northern continental margin of the South China Sea*[J]. Journal of Tropical Oceanography, 2021, 40(5): 111-122.
表1
OBS2018-H2测线10台OBS位置校正结果表"
OBS 编号 | 投放位置 | 校正后位置 | 校正后 水深/m | 海水 声速/(m·s-1) | 漂移 距离/m | RMS /ms | |||
---|---|---|---|---|---|---|---|---|---|
东经/(°) | 北纬/(°) | 东经/(°) | 北纬/(°) | ||||||
09 | 116.45648 | 18.48332 | 116.45343 | 18.48297 | 3800.2 | 1501.4 | 324.8 | 3.4 | |
25 | 115.88451 | 18.41252 | 115.88423 | 18.41135 | 3768.7 | 1501.3 | 131.9 | 4.8 | |
36 | 115.75399 | 18.39623 | 115.75665 | 18.39637 | 3766.2 | 1503.1 | 281.8 | 3.5 | |
37 | 116.01618 | 18.42904 | 116.01979 | 18.42997 | 3762.6 | 1500.1 | 394.2 | 4.4 | |
38 | 116.13817 | 18.44404 | 116.14042 | 18.44650 | 3763.0 | 1501.1 | 361.5 | 3.3 | |
39 | 116.23545 | 18.45643 | 116.23679 | 18.45858 | 3772.5 | 1500.2 | 277.6 | 4.7 | |
40 | 116.32148 | 18.46648 | 116.32100 | 18.46810 | 3781.6 | 1500.2 | 185.6 | 3.8 | |
41 | 116.55881 | 18.49536 | 116.55592 | 18.49517 | 3813.9 | 1498.1 | 305.6 | 4.7 | |
42 | 116.66120 | 18.50772 | 116.65918 | 18.50749 | 3837.5 | 1500.3 | 214.6 | 2.1 | |
43 | 116.76341 | 18.52016 | 116.76122 | 18.51933 | 3871.1 | 1499.1 | 248.5 | 3.7 |
[1] | 敖威, 赵明辉, 丘学林, 等, 2010. 西南印度洋中脊三维地震探测中炮点与海底地震仪的位置校正[J]. 地球物理学报, 53(12):2982-2991. |
AO WEI, ZHAO MINGHUI, QIU XUELIN, et al, 2010. The correction of shot and OBS position in the 3D seismic experiment of the SW India Ocean Ridge[J]. Chinese Journal of Geophysics, 53(12):2982-2991 (in Chinese with English abstract). | |
[2] | 郭玲莉, 李三忠, 赵淑娟, 等, 2017. 洋-陆转换带类型与成因机制[J]. 地学前缘, 24(4):320-328. |
GUO LINGLI, LI SANZHONG, ZHAO SHUJUAN, et al, 2017. Formation mechanism and types of ocean-continent transition zones[J]. Earth Science Frontiers, 24(4):320-328 (in Chinese with English abstract). | |
[3] | 郝天珧, 游庆瑜, 2011. 国产海底地震仪研制现状及其在海底结构探测中的应用[J]. 地球物理学报, 54(12):3352-3361. |
HAO TIANYAO, YOU QINGYU, 2011. Progress of homemade OBS and its application on ocean bottom structure survey[J]. Chinese Journal of Geophysics, 54(12):3352-3361 (in Chinese with English abstract). | |
[4] | 李春峰, 汪品先, FRANKE D, 等, 2009. 南海张裂过程及其对晚中生代以来东南亚构造的启示[J]. 地球科学进展, 24(12):1339-1351. |
LI CHUNFENG, WANG PINXIAN, FRANKE D, et al, 2009. Opening of the South China Sea and its implications for Southeast Asian tectonics since the late Mesozoic[J]. Advances in Earth Science, 24(12):1339-1351 (in Chinese with English abstract). | |
[5] | 李家彪, 金翔龙, 阮爱国, 等, 2004. 马尼拉海沟增生楔中段的挤入构造[J]. 科学通报, 49(10):1000-1008. |
LI JIABIAO, JIN XIANGLONG, RUANAIGUO, et al, 2004. Indentation tectonics in the accretionary wedge of middle Manila Trench[J]. Chinese Science Bulletin, 49(12):1279-1288 (in Chinese with English abstract). | |
[6] | 任金锋, 孙鸣, 朱本铎, 等, 2018. 南海北部IODP U1499站位砾石层的古沉积环境及构造意义[J]. 地球科学, 43(S2):179-191. |
REN JINFENG, SUN MING, ZHU BENDUO, et al, 2018. Paleo-sedimentary environment and tectonic significance of gravel layers at IODP site U1499 in Northern South China Sea[J]. Earth Science, 43(S2):179-191 (in Chinese with English abstract). | |
[7] | 汪品先, 2009. 南海——我国深海研究的突破口[J]. 热带海洋学报, 28(3):1-4. |
WANG PINXIAN, 2009. Toward scientific breakthrough in the South China Sea[J]. Journal of Tropical Oceanography, 28(3):1-4 (in Chinese with English abstract). | |
[8] | 杨富东, 张佳政, 杜峰, 等, 2020. 三维OBS探测实验中炮点和OBS位置校正新方法[J]. 地球物理学报, 63(2):766-777. |
YANG FUDONG, ZHANG JIAZHENG, DU FENG, et al, 2020. A new method for shots and OBSs’ relocation applying in three-dimensional seismic survey[J]. Chinese Journal of Geophysics, 63(2):766-777 (in Chinese with English abstract). | |
[9] | 张佳政, 丘学林, 赵明辉, 等, 2018. 南海巴士海峡三维OBS探测的异常数据恢复[J]. 地球物理学报, 61(4):1529-1538. |
ZHANG JIAZHENG, QIU XUELIN, ZHAO MINGHUI, et al, 2018. Abnormal data retrieval of three-dimensional OBS survey at the Bashi Channel area of the South China Sea[J]. Chinese Journal of Geophysics, 61(4):1529-1538 (in Chinese with English abstract). | |
[10] | 张莉, 赵明辉, 王建, 等, 2013. 南海中央次海盆 OBS 位置校正及三维地震探测新进展[J]. 地球科学—中国地质大学学报, 38(1):33-42. |
ZAHNG LI, ZAHO MINGHUI, WANG JIAN, et al, 2013. Correction of OBS position and recent advances of 3D seismic exploration in the central sub-basin of South China Sea[J]. Earth Science - Journal of China University of Geosciences, 38(1):33-42 (in Chinese with English abstract). | |
[11] | 赵明辉, 丘学林, 夏戡原, 等, 2004. 南海东北部海陆联测地震数据处理及初步结果[J]. 热带海洋学报, 23(1):58-63. |
ZHAO MINGHUI, QIU XUELIN, XIA KANYUAN, et al, 2004. Onshore-offshore seismic data processing and preliminary results in NE South China Sea[J]. Journal of Tropical Oceanography, 23(1):58-63 (in Chinese with English abstract). | |
[12] | 赵明辉, 丘学林, 夏少红, 等, 2008. 大容量气枪震源及其波形特征[J]. 地球物理学报, 51(2):558-565. |
ZHAO MINGHUI, QIU XUELIN, XIA SHAOHONG, et al, 2008. Large volume air-gun sources and its seismic waveform characters[J]. Chinese Journal of Geophysics, 51(2):558-565 (in Chinese with English abstract). | |
[13] | BRIAIS A, PATRIAT P, TAPPONNIER P, 1993. Updated interpretation of magnetic anomalies and seafloor spreading stages in the South China Sea: implications for the Tertiary tectonics of Southeast Asia[J]. Journal of Geophysical Research: Solid Earth, 98(B4):6299-6328. |
[14] | CLIFT P D, LIN JIAN, 2001. Patterns of extension and magmatism along the continent-ocean boundary, South China margin[M] // WILSON R C L, WHITMARSH R B, TAYLOR B, et al, Non-volcanic Rifting of Continental Margins: A Comparison of Evidence from Land and Sea. London: Geological Society, Special Publications, 187:489-510. |
[15] | DEAN S M, MINSHULL T A, WHITMARSH R B, et al, 2000. Deep structure of the ocean-continent transition in the Southern Iberia Abyssal Plain from seismic refraction profiles: the IAM-9 transect at 40°20′N[J]. Journal of Geophysical Research: Solid Earth, 105(B3):5859-5885. |
[16] |
DING WEIWEI, SCHNABEL M, FRANKE D, et al, 2012. Crustal structure across the northwestern margin of South China Sea: Evidence for magma-poor rifting from a wide-angle seismic profile[J]. Acta Geologica Sinica, 86(4):854-866.
doi: 10.1111/j.1755-6724.2012.00711.x |
[17] |
DING WEIWEI, SUN ZHEN, MOHN G, et al, 2020. Lateral evolution of the rift-to-drift transition in the South China Sea: Evidence from multi-channel seismic data and IODP Expeditions 367 & 368 drilling results[J]. Earth and Planetary Science Letters, 531:115932.
doi: 10.1016/j.epsl.2019.115932 |
[18] |
DU FENG, ZHANG JIAZHENG, YANG FUDONG, et al, 2018. Combination of least square and monte carlo methods for OBS relocation in 3D seismic survey near Bashi channel[J]. Marine Geodesy, 41(5):494-515.
doi: 10.1080/01490419.2018.1479993 |
[19] |
FRANKE D, BARCKHAUSEN U, BARISTEAS N, et al, 2011. The continent-ocean transition at the southeastern margin of the South China Sea[J]. Marine and Petroleum Geology, 28(6):1187-1204.
doi: 10.1016/j.marpetgeo.2011.01.004 |
[20] |
GAO JINWEI, WU SHIGUO, MCINTOSH K, et al, 2015. The continent-ocean transition at the mid-northern margin of the South China Sea[J]. Tectonophysics, 654:1-19.
doi: 10.1016/j.tecto.2015.03.003 |
[21] |
GAO JINWEI, WU SHIGUO, MCINTOSH K, et al, 2016. Crustal structure and extension mode in the northwestern margin of the South China Sea[J]. Geochemistry, Geophysics, Geosystems, 17:2143-2167.
doi: 10.1002/ggge.v17.6 |
[22] |
GEOFFROY L, 2005. Volcanic passive margins[J]. Comptes Rendus Geoscience, 337(16):1395-1408.
doi: 10.1016/j.crte.2005.10.006 |
[23] |
GEOFFROY L, BUROV E B, WERNER P, 2015. Volcanic passive margins: another way to break up continents[J]. Scientific Reports, 5:14828.
doi: 10.1038/srep14828 |
[24] | JIAN ZHIMIN, LARSEN H C, ALVAREZ ZARIKIAN C A, et al, 2018. Expedition 368 Preliminary Report: South China Sea Rifted Margin[M]. Texas: International Ocean Discovery Program. |
[25] |
LARSEN H C, JIAN ZHIMIN, ALVAREZ ZARIKIAN C A, et al, 2018b. Site U1502[M]// SUN ZHEN, JIAN ZHIMIN, STOCK J M, et al, South China Sea Rifted Margin. Proceedings of the International Ocean Discovery Program, 367/368: College Station, TX (International Ocean Discovery Program), doi: 10.14379/iodp.proc.367368.108.2018.
doi: 10.14379/iodp.proc.367368.108.2018 |
[26] |
LARSEN H C, MOHN G, NIRRENGARTEN M, et al, 2018a. Rapid transition from continental breakup to igneous oceanic crust in the South China Sea[J]. Nature Geoscience, 11(10):782-789.
doi: 10.1038/s41561-018-0198-1 |
[27] |
LAVIER L L, MANATSCHAL G, 2006. A mechanism to thin the continental lithosphere at magma-poor margins[J]. Nature, 440(7082):324-328.
doi: 10.1038/nature04608 |
[28] | LIU SIQING, ZHAO MINGHUI, SIBUET J C, et al, 2018. Geophysical constraints on the lithospheric structure in the northeastern South China Sea and its implications for the South China Sea geodynamics[J]. Tectonophysics, 742- 743:101-119. |
[29] | LUDWIG W J, KUMAR N, HOUTZ R E, 1979. Profiler- Sonobuoy measurements in the South China Sea Basin[J]. Journal of Geophysical Research: Solid Earth, 84(B7):3505-3518. |
[30] |
PÉREZ-GUSSINYÉ M, MORGAN J P, RESTON T J, et al, 2006. The rift to drift transition at non-volcanic margins: insights from numerical modelling[J]. Earth and Planetary Science Letters, 244(1-2):458-473.
doi: 10.1016/j.epsl.2006.01.059 |
[31] |
RESTON T J, 2007. The formation of non-volcanic rifted margins by the progressive extension of the lithosphere: the example of the West Iberian margin[J]. Geological Society, London, Special Publication, 282(1):77-110.
doi: 10.1144/SP282.5 |
[32] |
RESTON T J, 2009. The structure, evolution and symmetry of the magma-poor rifted margins of the North and Central Atlantic: A synjournal[J]. Tectonophysics, 468(1-4):6-27.
doi: 10.1016/j.tecto.2008.09.002 |
[33] |
SCHNABEL M, FRANKE D, ENGELS M, et al, 2008. The structure of the lower crust at the Argentine continental margin, South Atlantic at 44°S[J]. Tectonophysics, 454(1-4):14-22.
doi: 10.1016/j.tecto.2008.01.019 |
[34] |
STOCKWELL J W, 1999. The CWP/SU: Seismic Unix package[J]. Computers & Geosciences, 25(4):415-419.
doi: 10.1016/S0098-3004(98)00145-9 |
[35] |
SUN QILIANG, ALVES T M, ZHAO MINGHUI, et al, 2020. Post-rift magmatism on the northern South China Sea margin[J]. GSA Bulletin, 132(11-12):2382-2396.
doi: 10.1130/B35471.1 |
[36] |
SUN ZHEN, LIN JIAN, QIU NING, et al, 2019. The role of magmatism in the thinning and breakup of the South China Sea continental margin: special topic: the south china sea ocean drilling[J]. National Science Review, 6(5):871-876.
doi: 10.1093/nsr/nwz116 |
[37] |
SUN ZHEN, STOCK J, JIAN ZHIMIN, et al, 2016. Expedition 367/368 Scientific Prospectus: South China Sea Rifted Margin[M]. International Ocean Discovery Program, doi: 10.14379/iodp.sp.367368.2016.
doi: 10.14379/iodp.sp.367368.2016 |
[38] | TAYLOR B, HAYES D E, 1983. Origin and history of the South China Sea basin[M]// HAYES D E. The Tectonic and Geologic Evolution of Southeast Asian Seas and Islands: Part 2. Washington: Geophysical Monograph Series, 23-56. |
[39] |
WAN XIAOLI, LI CHUNFENG, ZHAO MINGHUI, et al, 2019. Seismic velocity structure of the magnetic quiet zone and continent-ocean boundary in the northeastern South China Sea[J]. Journal of Geophysical Research: Solid Earth, 124(11):11866-11899.
doi: 10.1029/2019JB017785 |
[40] |
WANG T K, CHEN M K, LEE C S, et al, 2006. Seismic imaging of the transitional crust across the northeastern margin of the South China Sea[J]. Tectonophysics, 412(3-4):237-254.
doi: 10.1016/j.tecto.2005.10.039 |
[41] |
WHITMARSH R B, MANATSCHAL G, MINSHULL T A, 2001. Evolution of magma-poor continental margins from rifting to seafloor spreading[J]. Nature, 413(6852):150-154.
doi: 10.1038/35093085 |
[42] | WILLIAM C T, JOSEPH E T, 1991. SAC-Seismic Analysis Code Users Manual[J]. Livermore. CA: Lawrence Livermore National Laboratory: 1-153. |
[43] |
YAN PIN, ZHOU DI, LIU ZHAOSHU, 2001. A crustal structure profile across the northern continental margin of the South China Sea[J]. Tectonophysics, 338(1):1-21.
doi: 10.1016/S0040-1951(01)00062-2 |
[44] |
ZHAO MINGHUI, QIU XUELIN, XIA SHAOHONG, et al, 2010. Seismic structure in the northeastern South China Sea: S-wave velocity and Vp/Vs ratios derived from three-component OBS data[J]. Tectonophysics, 480(1-4):183-197.
doi: 10.1016/j.tecto.2009.10.004 |
[45] | ZHU JUN JIANG, QIU XUELIN, KOPP H, et al, 2012. Shallow anatomy of a continent-ocean transition zone in the northern South China Sea from multichannel seismic data[J]. Tectonophysics, 554- 557:18-29. |
[46] |
ZHU JUN JIANG, XU HUILONG, QIU XUELIN, et al, 2018. Crustal structure and rifting of the northern South China Sea margin: Evidence from shoreline-crossing seismic investigations[J]. Geological Journal, 53(5):2065-2083.
doi: 10.1002/gj.v53.5 |
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