慢速、超慢速扩张洋中脊三维地震结构研究进展与展望

doi:10.11978/j.issn.1009-5470.2010.06.001

Journal of Tropical Oceanography ›› 2010, Vol. 29 ›› Issue (6): 1-7.doi: 10.11978/j.issn.1009-5470.2010.06.001cstr: 32234.14.j.issn.1009-5470.2010.06.001

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Research development and prospect on three-dimensional seismic structures of slow and ultraslow spreading ocean ridges

ZHAO Ming-hui1, QIU Xue-lin1, LI Jia-biao2, CHEN Yong-shun3, RUAN Ai-guo2, AO Wei1,4,
WANG Chun-long1, LI Shou-jun2, Zhang Jia-zheng1,4, WU Zhen-li2, NIU Xiong-wei2

1. Key Laboratory of Marginal Sea Geology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301; 2. The Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012; 3. Computational Geodynamics Laboratory, Department of Geophysics, School of Earth and Space Sciences, Peking University, Beijing 100871; 4. Graduate Uni-versity of Chinese Academy of Sciences, Beijing 100049, China

Received:2010-04-29 Revised:2010-07-19 Online:2010-12-15 Published:2010-12-15
About author:赵明辉(1967—), 女, 辽宁省锦州市人, 副研究员, 博士, 主要从事海洋地球物理与深部结构研究。E-mail: mhzhao@scsio.ac.cn
Supported by:
中国科学院知识创新工程项目(KZCX2-YW-Q05-04); 大洋“十一五”课题(DYXM-115-02-3-01); 国家“863”项目(2008AA093001);
科技部“973”项目(2007CB411701); 国家自然科学基金项目(41076029); 中国科学院南海海洋研究所领域前沿项目(LYQY200704)

Abstract

Abstract:

Slow and ultraslow spreading ridges are the key areas for studying interplay among magmatism, tectonics, and hy-drothermal circulation comparing to the fast spreading ridges. Their complicated three-dimensional (3D) seismic structures are the basis of finding their tectonic dynamic mechanism. The research on the 3D seismic structures is reviewed in terms of slow spreading ridges in deep oceans, including its developing international research trend. The new experiments have detected a magma chamber or a melt body at a slow spreading ridge, same as at a fast spreading ridge. The 3D seismic survey for the first time was carried out on the southwest Indian Ocean Ridge from January to March in 2010. The key research aspects are then put forward based on these seismic experiment data. Its preliminary disposing result of the seismic data indicates that the high quality of the seismic data is the strong foundation of the 3D tomography. It is promising to make breakthrough in mechanism on ultraslow spreading ridges. The research will surely promote the Chinese status in the field of international ocean ridges.

Key words: three-dimensional seismic structure, the southwest Indian Ocean Ridge, slow spreading ridge, ultraslow spreading ridge, magma chamber

ZHAO Ming-hui,QIU Xue-lin,LI Jia-biao,CHEN Yong-shun,RUAN Ai-guo,AO We. Research development and prospect on three-dimensional seismic structures of slow and ultraslow spreading ocean ridges[J].Journal of Tropical Oceanography, 2010, 29(6): 1-7.

References

[1] 孙枢. 将我国深海大洋研究推向新阶段 [J]. 地球科学进展, 2003, 18(5): 653.

[2] 汪品先. 走向地球系统科学的必由之路 [J]. 地球科学进展, 2003, 18(5): 795–796.

[3] 汪品先. 穿凿地球系统的时间隧道 [J]. 中国科学: D辑, 2009, 39(10): 1313–1338.

[4] 曾志刚, 翟世奎, 杜安道. 大西洋洋中脊TAG热液区中块状硫化物的Os同位素研究[J]. 沉积学报, 2002, 20(3): 394–398.

[5] 卜文瑞, 石学法. 大洋中脊地质研究的进展与趋势 [J]. 海洋科学进展, 2003, 21(4): 482–486.

[6] 薛发玉, 翟世奎.大洋中脊研究进展 [J]. 海洋科学, 2006, 30(3): 66–72.

[7] 陈永顺. 海底扩张和大洋中脊动力学问题概述[C]//地球的结构、演化和动力学. 北京: 高等教育出版社, 2003. 283–317.

[8] 中国大洋钻探学术委员会. 中国加入综合大洋钻探(IODP) 科学计划(2003—2013) [J]. 地球科学进展, 2003, 18(5): 662–665.

[9] 田丽艳, 林间. 全球大洋中脊研究十年科学规划(2004—2013) [J]. 海洋地质动态, 2004, 20(3): 10–15.

[10] PURDY G M L, KONG S L, CHRISTESON G L, et al. Relationship between spreading rate and the seismic structure of mid-ocean ridge [J]. Nature, 1992, 355: 815–817.

[11] MORGAN J P, CHEN Y C. Dependence of ridge-axis morphology on magma supply and spreading rate [J]. Nature, 1993, 364: 706–708.

[12] DICK H J B, LIN J, SCHOUTEN H. An ultraslow-spreading class of ocean ridge [J]. Nature, 2003, 426: 405–412.

[13] CANNAT M, ROMMEVAUX-JESTIN C, SAUTER D, et al. Formation of the axial relief at the very slow spreading Southwest Indian Ridge (49° to 69°E) [J]. Journal of Geophysical Research, 1999, 104: 2825–2843.

[14] SAUTER D, PATRIAT P, ROMMEVAUX-JESTIN C, et al. The Southwest Indian Ridge between 49°15¢E and 57°E: Focused accretion and magma redistribution [J]. Earth and Planetary Science Letter, 2001, 192: 303–317.

[15] SINHA M, CONSTABLE S, PEIRCE C, et al. Magmatic processes at slow spreading ridges: implications of the RAMESSES experiment at 57°45¢N on the Mid-Atlantic Ridge [J]. Geophysical Journal International, 1998, 135: 731–745.

[16] CHEN Y J. Dependence of crustal accretion and ridge axis topography on spreading rate, mantle temperature, and hydrothermal cooling[C]//DILEK Y, MOORES E M, ELTHON D. Ophiolites and oceanic crust—New insights from field studies and the Ocean Drilling Program: Boulder, Colorado, Geological Society of America Special Paper 349. 2000: 161–179.

[17] KONG L S L, Solomon S C ,Purdy G M. Microearthquake characteristics of a mid-ocean ridge along-axis high [J]. Journal of Geophysical Research, 1992, 97: 1659–1685.

[18] HOOFT E E E, DETRICK R S, TOOMEY D R, et al. Crus-tal thickness and structure along three contrasting spreading segments of the Mid-Atlantic Ridge, 33.5°−35°N [J]. Journal of Geophysical Research, 2000, 105(B4): 8205-8226.

[19] CANALES J P, COLLINS J A, ESCARTIN J, et al. Seismic structure across the rift valley of the Mid-Atlantic Ridge at 23°20¢N (MARK area): Implications for crustal accretion processes at slow spreading ridges [J]. Journal of Geophysical Research, 2000, 105: 28, 411–28,425.

[20] CANALES J P, SINGH S, CARBOTTE S, et al. Seismic evidence for variations in axial magma chamber properties along the southern Juan de Fuca Ridge [J]. Earth and Planetary Science Letter, 2006, 246: 353–366.

[21] NAVIN D, PEIRCE C, and SINHA M. The RAMESSES experiment-II Evidence for accumulated melt beneath a slow spreading ridge from wide-angle refraction and multichannel reflection seismic profiles [J]. Geophysical Journal Interna-

tional, 1998, 135: 746–772.

[22] DUNN R A, LEKIC V, DETRICK R S, et al. Three-dimensional seismic structure of the Mid-Atlantic Ridge (35°N): Evidence for focused melt supply and lower crustal dike injection[J]. Journal of Geophysical Research, 2005, 110: B09101. doi: 10.1029/2004JB003473.

[23] SEHER T, CRAWFORD W C, SINGH S C, et al. Crustal velocity structure of the Lucky Strike segment of the Mid-Atlantic Ridge at 37°N from seismic refraction measurements [J]. Journal of Geophysical Research, 2010, 115: B03103. doi: 10.1029/2009JB006650.

[24] CHEN Y J. Influence of the Iceland mantle plume on crustal accretion at the inflated Reykjanes ridge: magma lens and

low hydrothermal activity? [J]. Journal of Geophysical Research, 2003, 108 (B11): 2524–2536. doi: 10.1029/ 2001JB000816.

[25] HOSFORD A, LIN J, and DETRICK R S. Crustal evolution over the last 2 m.y. at the Mid-Atlantic Ridge OH-1 segment, 35°N [J]. Journal of Geophysical Research, 2001, 106: 13 269–13 285.

[26] DETRICK R, NEEDHAM H, and RENARD V. Gravity anomalies and crustal thickness variations along the Mid-atlantic Ridge between 33°N and 40°N [J]. Journal of Geophysical Research, 1995, 100 (B3): 3767–3787.

[27] PARSON L, GRÁCIA E, COLLER D, et al. Second-order segmentation; the relationship between volcanism and tectonism at the MAR, 38°N−35°40¢N [J]. Earth and Planetary Science Letter, 2000, 178: 231–251.

[28] TAO C H, LIN J, GUO S, et al. Discovery of the first active hydrothermal vent field at the ultraslow spreading Southwest Indian Ridge [J]. InterRidge News, 2007, 16: 25–26.

[29] 阮爱国, 李家彪, 陈永顺, 等. 国产I-4C型OBS在西南印度洋中脊的试验[J]. 地球物理学报, 2010, 53(4): 1015-1018.

[30] SINGH S C, CRAWFORD W C, CARTON H, et al. Discovery of a magma chamber and faults beneath a Mid-Atlantic Ridge hydrothermal field [J]. Nature, 2006, 442: 1029–1032.

[31] BAZIN S, HARDING A J, KENT G M, et al. A three-dimensional study of crustal low velocity region beneath the 9°03¢N overlapping spreading center [J]. Geophysical Research Letters, 2003, 30(2): 1039. doi: 10.1029/ 2002GL015137.

[32] CANN J R, STRENS M R, RICE A. A simple magma-driven thermal balance model for the formation of volcanogenic massive sulphides [J]. Earth and Planetary Science Letter, 1985, 76: 123–134.

[33] LISTER C R B. On the penetration of water into hot rock [J]. Geophys J R Astron Soc, 1974, 39: 465–509.

[34] WILCOCK W S D, DELANEY J R. Mid-ocean ridge sulfide deposits: Evidence for heat extraction from magma chambers or cracking fronts? [J]. Earth and Planetary Science Letter, 1996, 145: 49–64.

[35] CANN J R, STRENS M R. Black smokers fuelled by freezing magma [J]. Nature, 1982, 298: 147–149.

[36] MARTINEZ F, TAYLOR B, BAKER E T, et al. Opposing trends in crustal thickness and spreading rate along the back-arc Eastern Lau Spreading Center: Implications for controls on ridge morphology, faulting, and hydrothermal activity [J]. Earth and Planetary Science Letter, 2006, 245: 655–672.

[37] DUNN R A, TOOMEY D R, and SOLOMON S C. Three dimensional seismic structure and physical properties of the crust and shallow mantle beneath the East Pacific Rise at 9°30¢N [J]. Journal of Geophysical Research, 2000, 105: 23537–23555.

QIU J. China outlines deep-sea ambitions [J]. Nature, 2010, 466: 166

Research development and prospect on three-dimensional seismic structures of slow and ultraslow spreading ocean ridges

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