南海东北部陆坡与恒春海脊天然气水合物分布的地震反射对比(英文)
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摘要
经过对"探宝号"调查船在2001年8月在南海东北部陆坡及台湾南部恒春海脊海域采集的多道地震剖面资料进行的地震反射波数据分析、研究和解释,结果表明:(1)南海东北部陆坡段区域和台湾南部恒春海脊海域地震剖面上均显示有被作为天然气水合物存在标志的BSR,但两区域构造成因、形式和相关地质环境的不同造成了此两处的天然气水合物成因及过程的不同。(2)南海东北部陆坡区域的水合物形成与该区广泛发育的断裂带、滑塌构造体及其所形成的压力场屏蔽环境有关,而台湾南部恒春海脊海域的天然气水合物的形成则与马尼拉海沟俯冲带相关的逆冲推覆构造、增生楔等及其所对应的海底流体疏导体系有关。(3)南海陆缘区域广泛发育有各种断裂带、滑塌构造体、泥底辟、俯冲带、增生楔等,且温压环境合适,是天然气水合物矿藏极有可能广泛分布的区域。
By analyzing and interpreting the newly acquired seismic profile supported by the national 973 Program and synthesizing the data with other geologic & geographic information,we draw conclusions as follows. a) Two seismic reflections located at the northeast South China Sea (SCS) slope and the Hengchun ridge are the Bottom Simulated Reflections (BSRs). Yet,the genesis and process of the gas hydrate in these two areas are different because of different regional tectonics and geological environments; b) The genesis of gas hydrate located at the northeast SCS slope area is related to the broadly existing fracture zones,slumping tectosomes,and the distinctive shielding environment of pressure masking field formed by them. But the genesis of the gas hydrate at the Hengchun ridge is associated with the thrust nappe structures and accretionary wedges formed along the Manila subduction zone and the related sub-floor fluid channel system built by them; c) Since the analogous geologic bodies are broadly distributed at slope areas around SCS and the temperature-press environment is very suitable to the formation and conservation of the gas hydrate,we suggest that much more of this resource should be stored in these areas.
By analyzing and interpreting the newly acquired seismic profile supported by the national 973 Program and synthesizing the data with other geologic & geographic information,we draw conclusions as follows. a) Two seismic reflections located at the northeast South China Sea (SCS) slope and the Hengchun ridge are the Bottom Simulated Reflections (BSRs). Yet,the genesis and process of the gas hydrate in these two areas are different because of different regional tectonics and geological environments; b) The genesis of gas hydrate located at the northeast SCS slope area is related to the broadly existing fracture zones,slumping tectosomes,and the distinctive shielding environment of pressure masking field formed by them. But the genesis of the gas hydrate at the Hengchun ridge is associated with the thrust nappe structures and accretionary wedges formed along the Manila subduction zone and the related sub-floor fluid channel system built by them; c) Since the analogous geologic bodies are broadly distributed at slope areas around SCS and the temperature-press environment is very suitable to the formation and conservation of the gas hydrate,we suggest that much more of this resource should be stored in these areas.
引文
[1] Sha Zhibin, Yang Muzhuang, Liang Jin, et al. The Characteristics of the Abnormal Physiognomys of Seabed related to Gas Hydrate in North Slope, South China Sea [J]. Wuhan: China University of Geosciences Press. 2003, 14:29-34.
[2] Yao Bochu. Preliminary Exploration of Gas Hydrate in the Northern Margin of the South China Sea [J]. Marine Geology & Quaternary Geology, 1998, 18(4):11-18.
[3] He Jiaxiong.The Evolving of Gas Hydrate and the Exploration Foreground in the North of South China Sea [J]. Offshore Oil, 2003, 23(1):57-64.
[4] Zhang Guangxue, Huang Yongyang, Chen Bangyan, et al. Prospect of Gas Hydrate Resources in the South China Sea [J]. Marine Geology & Quaternary Geology, 2002, 22(1): 75-81.
[5] Wu Bihao, Zhang Guangxue, Zhu Youhai, et al. Progress of the Gas Hydrate Investigation in China Offshore [J]. Earth Science Fronties, 2003, 10(1):177-189.
[6] Ma Zaitian, Geng Jianhua, Dong Jianhua, et al. Seismic Recognition Studies on Marine Gas Hydrate [J]. Marine Geology & Quaternary Geolog, 2002, 22(1):1-8.
[7] Yao Bochu. The Gas Hydrate in the South China Sea [J]. Journal of Tropical Oceanography, 2001, 20(2): 20-28
[8] Berner U, Faber E. Hydrocarbon Gases in Surface Sediments of the South China Sea [A]. JIN Xianglong, Kudrass H R, PautoT G. Marine Geology and Geolophysics of the South China Sea [C]. Beijing: China Ocean Press.1990, 199-211.
[9] Chi W C., Reed D L, Liu C S, et al. Distribution of the Bottom-Simulation Reflector in the Offshore Taiwan Collision Zone [J]. TAO. 1998, 9(4):779-794.
[10] Yang Muzhuang, Wu Nengyou, Wu Shiguo, et al. Special Geological Environment at Northern Slope of South China Sea and Distribution of BS [A]. Li Jiabiao, Gao Shu. Evolution and Resources Effects of China Marginal Basins [C]. Beijing: China Ocean Press. 2004, 176-181.
[11] Song Haibin, Geng Jianhua, Wang How-king, et al. A Preliminary Study of Gas Hydrates in Dongsha Region North of South China Sea [J]. Chinese Journal of Geophysics, 2001,44(5): 687-695.
[12] Lu Zhengquan, Qiang Zuji, Wu Bihao. Exploring Gas Hydrates by Satellite-Based thermal Infrared remote Sensing in the South China Sea [J]. Acta Geologica Sinica, 2002, 76(1):100-106.
[13] Song Haibin, Wu Nengyou, Wu Shiguo, et al. Processing to the national 973 Seismic Profiles in Northeast South China Sea and ITS BSR Characteristic [A]. Li Jiabiao, Gao Shu. Evolution and Resources Effects of China Marginal Basins [C]. Beijing: China Ocean Press. 2004, 182-185.
[14] Shyu Chuen-tien, Hsu Shu-kun, Liu Char-shin. Heatflows off Southwest Taiwan: Measurements over Mud Diapirs and Estimated from Bottom Simulating Reflectors [J]. Tao, 1998, 9(4):795-812
[15] Jin Qinhuan. Geology and Oil & Gas Resources in South China Sea [M]. Beijing: Geological Publishing House. 1989, 257-262.
[16] Fuh S C, Liu C S, Lundberg N, et al. Strike–slip Faults Offshore Outhern Taiwan: Implications for the oblique Arc-continent Collision Processes [J]. Tectonophysics, 1997, 274:25-40.
[17] Tsai Y B. Seismotectonics of Taiwan [J]. Tectonophysics, 1986, 125:17-35.
[18] Tang J C, Chemenda A I. Numerical Modeling of Arc-continent Collision: Application to Taiwan [J]. Tectonophysics, 2000, 325:23-42.
[2] Yao Bochu. Preliminary Exploration of Gas Hydrate in the Northern Margin of the South China Sea [J]. Marine Geology & Quaternary Geology, 1998, 18(4):11-18.
[3] He Jiaxiong.The Evolving of Gas Hydrate and the Exploration Foreground in the North of South China Sea [J]. Offshore Oil, 2003, 23(1):57-64.
[4] Zhang Guangxue, Huang Yongyang, Chen Bangyan, et al. Prospect of Gas Hydrate Resources in the South China Sea [J]. Marine Geology & Quaternary Geology, 2002, 22(1): 75-81.
[5] Wu Bihao, Zhang Guangxue, Zhu Youhai, et al. Progress of the Gas Hydrate Investigation in China Offshore [J]. Earth Science Fronties, 2003, 10(1):177-189.
[6] Ma Zaitian, Geng Jianhua, Dong Jianhua, et al. Seismic Recognition Studies on Marine Gas Hydrate [J]. Marine Geology & Quaternary Geolog, 2002, 22(1):1-8.
[7] Yao Bochu. The Gas Hydrate in the South China Sea [J]. Journal of Tropical Oceanography, 2001, 20(2): 20-28
[8] Berner U, Faber E. Hydrocarbon Gases in Surface Sediments of the South China Sea [A]. JIN Xianglong, Kudrass H R, PautoT G. Marine Geology and Geolophysics of the South China Sea [C]. Beijing: China Ocean Press.1990, 199-211.
[9] Chi W C., Reed D L, Liu C S, et al. Distribution of the Bottom-Simulation Reflector in the Offshore Taiwan Collision Zone [J]. TAO. 1998, 9(4):779-794.
[10] Yang Muzhuang, Wu Nengyou, Wu Shiguo, et al. Special Geological Environment at Northern Slope of South China Sea and Distribution of BS [A]. Li Jiabiao, Gao Shu. Evolution and Resources Effects of China Marginal Basins [C]. Beijing: China Ocean Press. 2004, 176-181.
[11] Song Haibin, Geng Jianhua, Wang How-king, et al. A Preliminary Study of Gas Hydrates in Dongsha Region North of South China Sea [J]. Chinese Journal of Geophysics, 2001,44(5): 687-695.
[12] Lu Zhengquan, Qiang Zuji, Wu Bihao. Exploring Gas Hydrates by Satellite-Based thermal Infrared remote Sensing in the South China Sea [J]. Acta Geologica Sinica, 2002, 76(1):100-106.
[13] Song Haibin, Wu Nengyou, Wu Shiguo, et al. Processing to the national 973 Seismic Profiles in Northeast South China Sea and ITS BSR Characteristic [A]. Li Jiabiao, Gao Shu. Evolution and Resources Effects of China Marginal Basins [C]. Beijing: China Ocean Press. 2004, 182-185.
[14] Shyu Chuen-tien, Hsu Shu-kun, Liu Char-shin. Heatflows off Southwest Taiwan: Measurements over Mud Diapirs and Estimated from Bottom Simulating Reflectors [J]. Tao, 1998, 9(4):795-812
[15] Jin Qinhuan. Geology and Oil & Gas Resources in South China Sea [M]. Beijing: Geological Publishing House. 1989, 257-262.
[16] Fuh S C, Liu C S, Lundberg N, et al. Strike–slip Faults Offshore Outhern Taiwan: Implications for the oblique Arc-continent Collision Processes [J]. Tectonophysics, 1997, 274:25-40.
[17] Tsai Y B. Seismotectonics of Taiwan [J]. Tectonophysics, 1986, 125:17-35.
[18] Tang J C, Chemenda A I. Numerical Modeling of Arc-continent Collision: Application to Taiwan [J]. Tectonophysics, 2000, 325:23-42.
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