Scientific Implications and Preliminary Surveying Results of Geological and Physical Oceanography Environment in the Shenhu Area of the Northern South China Sea
-
摘要: 在南海北部神狐海域水合物活跃区域开展了一次综合的海洋地质、物理海洋和生态环境调查,10个站位分布在水深1 000~4 000 m范围内的陆坡和深水盆地区域,是南海北部油气活跃的重要区域和天然气水合物试采区域.航次主要对10个海底站位进行了表层沉积物箱式和重力活塞柱状取样.针对天然气水合物试采区域,开展了一台"海燕"水下滑翔机的海洋物理环境连续走航剖面观测.利用海底地震仪在两个站位开展了连续海底地震和微振动观测.进行了站位的分层水体和沉积物样品中微生物学实验研究.初步航次结果展示了沉积物为黏土和软泥.站位和水下滑翔机走航观测提供了水体内海洋物理环境参数变化特征.海底地震仪观测展示了研究区天然地震活动和可能与水合物活动有关的微震动和短持续事件记录.微生物学实验揭示了沉积物中的微生物细菌群落特征.Abstract: A multi-disciplinary synthetic survey about marine geological, physical oceanography and biological environment was conducted in the Shenhu area bearing with the active gas hydrate in the northern South China Sea. Ten box corer and gravity-piston corer sites were located with the water depth of 1 000 to 4 000 m in the continental slope and deep basin area. It is the key area with the active oil and gas hydrate and is also the region of trial production of the gas hydrate in the northern South China Sea. The 10 sites coring designed by the cruise was conducted onboard with the surface box corer and gravity-piston corer sediment sampling. By deploying a "Haiyan" underwater glider, the underway measurement time-series profiles of the physical oceanography environment were obtained on the area of trial production of the gas hydrate in the Shenhu area. By using deployment and recovery of the two ocean bottom seismometers on two sites, time-series data of seafloor seismicity and microseisms and short duration events were obtained. Layering water sample from the CTD's bottles and sediment samples from the box corers and gravity-piston corers are conducted by the microbiological experiment testing. The preliminary results of the cruise indicate that the sediment type is mainly clay and soft mud in the surveying area. The temperature and salinity parameter variations of the whole seawater from the CTD measurements and from the underwater glider are clearly shown. The seismicity activity and micro tremor possibly related to the gas hydrate is observed by the ocean bottom seismometers. The microbiological experiment shows the characteristic of the bacterial community abundance in the sediment.
-
表 1 南海及华南天然地震参数
Table 1. Earthquake parameters in South China and adjacent of the South China Sea
发震日期 时间 纬度(°N) 经度(°E) 震源深度(km) 震级(ML) 震中位置 2019-03-07 14:42:01.0 21.74 111.77 10 0.6 广东阳西 2019-03-07 11:49:03.0 20.97 120.24 28 4.3 台湾屏东 2019-03-06 20:47:32.0 23.92 114.49 10 0.2 广东东源 2019-03-06 18:09:20.0 22.40 111.33 9 1.8 广东信宜 2019-03-06 17:06:28.0 23.72 114.66 7 0.6 广东河源 2019-03-05 20:55:09.0 21.74 111.81 12 0.4 广东阳江 2019-03-05 15:03:39.0 23.37 118.55 13 2.1 台湾海峡 2019-03-05 13:55:11.0 21.75 111.78 8 0.1 广东阳西 2019-03-04 18:16:06.0 21.75 111.83 11 0.6 广东阳江 2019-03-04 13:43:10.0 23.92 114.48 10 0.2 广东东源 2019-03-04 12:17:30.0 23.73 114.69 9 0.6 广东河源 2019-03-04 10:53:22.0 23.92 114.48 10 0.1 广东东源 2019-03-04 10:52:50.0 23.92 114.48 10 0.1 广东东源 2019-03-04 07:38:37.0 21.79 111.79 18 0.7 广东阳西 2019-03-03 08:45:10.0 23.36 118.54 11 1.8 台湾海峡 2019-03-03 04:34:26.0 21.26 121.50 7 3.3 南海海域 2019-03-02 23:12:28.0 23.36 118.54 3 2.1 台湾海峡 2019-03-02 19:28:48.0 23.35 117.45 16 0.5 福建东山 2019-03-02 00:20:11.0 23.33 118.59 10 1.6 台湾海峡 2019-03-02 00:06:26.0 23.75 114.64 9 0.4 广东河源 2019-03-01 19:26:53.0 21.72 111.78 12 0.3 广东阳西 2019-03-01 10:22:56.0 21.73 111.81 8 0.1 广东阳江 2019-02-28 21:31:39.0 23.13 113.09 12 1.5 广东南海 2019-02-28 15:57:14.0 21.78 112.28 9 0.2 广东阳东 2019-02-26 22:15:33.0 21.74 111.80 11 0.1 广东阳江 2019-02-26 02:03:23.0 22.31 110.26 9 1.0 广西陆川 2019-02-26 02:03:23.0 22.31 110.26 9 1.0 广西陆川 注:时间范围从2019年2月26日至3月8日;区域范围北纬15°~24°,东经110°~121°.数据据中国地震台网中心数据(http://www.ceic.ac.cn/history). 表 2 南海及马尼拉海沟附近天然地震参数
Table 2. Earthquake parameters in the Manila trench and adjacent of the South China Sea
发震日期 时间 纬度(°N) 经度(°E) 震源深度(km) 震级 震中位置 2019-03-08 02:32:14.543 22.459 5 121.457 1 13.00 5.4 Mw 台东 2019-03-07 03:49:01.820 20.843 2 120.339 3 10.00 4.9 Mb 台湾恒春 2019-03-02 20:34:25.560 20.896 5 121.589 1 61.70 4.5 Mb 菲律宾伊巴雅特 2019-03-02 19:49:24.210 18.625 8 120.346 0 10.00 4.9 Mb 菲律宾达维拉 2019-03-02 19:46:21.720 18.654 2 120.356 2 15.68 5.6 Mw 菲律宾达维拉 2019-03-01 20:51:28.150 17.058 0 120.641 3 115.48 4.5 Mb 菲律宾沙该 注:时间范围从2019年2月26日至3月8日;区域范围北纬15°~24°,东经110°~122°.数据据美国地质调查局(USGS)地震目录数据(https://earthquake.usgs.gov/earthquakes/search/). -
Alford, M., Peacock, T., MacKinnon, J., et al. 2015. The Formation and Fate of Internal Waves in the South China Sea. Nature, 521:65-69. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=93f786357036b18d743345baff5a15ea Cai, S.Q., Xie, J. S., He, J. L., 2012. An Overview of Internal Solitary Waves in the South China Sea. Surveys in Geophysics, 33(5):927-943. https://doi.org/10.1007/s10712-012-9176-0 Chen, D. X., Wang, X. J., Völker, D., et al., 2016. Three Dimensional Seismic Studies of Deep-Water Hazard-Related Features on the Northern Slope of South China Sea. Marine and Petroleum Geology, 77:1125-1139. https://doi.org/10.1016/j.marpetgeo.2016.08.012 Gong, Z. S., Li, S. T., Xie, T. J., et al., 1997. Continental Margin Basin Analysis and Hydrocarbon Accumulation of the Northern SCS. Science Press, Beijing (in Chinese). Guo, C., Chen, X., 2014. A Review of Internal Solitary Wave Dynamics in the Northern South China Sea. Progress in Oceanography, 121:7-23. https://doi.org/10.1016/j.pocean.2013.04.002 Kvenvolden, K. A., 1999. Potential Effects of Gas Hydrate on Human Welfare. Proceedings of the National Academy of Sciences of the United States of America, 96(7):3420-3426. http://d.old.wanfangdata.com.cn/OAPaper/oai_pubmedcentral.nih.gov_34283 Li, J. B., 2008. Evolution of China's Marginal Seas and Its Effect of Natural Resources. Ocean Press, Beijing (in Chinese). Li, S. Z., Suo, Y. H., Liu, X., et al., 2012. Basic Structural Pattern and Tectonic Models of the SCS: Problems, Advances and Controversies. Marine Geology & Quaternary Geology, 32, 35-53 (in Chinese with English abstract). Li, L., Song, H.B., Yang, J.H., et al., 2006.A Preliminary Study of Seafloor Gas Seepage in Central Sag Zone of Yinggehai Basin. Progress in Geophysics, 21(4):1244-1247(in Chinese with English abstract). http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=dqwlxjz200604030 Liu, Z. F., Li, X. J., Colin, C., et al., 2010. A High-Resolution Clay Mineralogical Record in the Northern South China Sea since the Last Glacial Maximum, and Its Time Series Provenance Analysis. Chinese Science Bulletin, 55(35):4058-4068. https://doi.org/10.1007/s11434-010-4149-5 Liu, B.M., Niu, B.H., Sun, C.Y., et al., 2007.Late Hydrocarbon Accumulation Mechanism and Dynamics Offshore the Northern South China Sea. Petroleum Geology & Experiment, 29(5):441-445(in Chinese with English abstract). http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=sysydz200705001 Lu, J.G., Yang, S.X., Wu, N.Y., et al., 2008.Well Logging Evaluation of Gas Hydrates in Shenhu Area, South China Sea.Geoscience, 22(3):447-451(in Chinese with English abstract). http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=xddz200803015 Meng, X.J., Zhang, X.H., Han, B., et al., 2012.The Geophysical Characteristics of Submarine Mud Volcano. Marine Geology Frontiers, 28(12):6-9, 45(in Chinese with English abstract). http://d.old.wanfangdata.com.cn/Periodical/hydzdt201212002 Niu, Y. L., Tang, J., 2016. Origin of the Yellow Sea:An Insight. Science Bulletin, 61(14):1076-1080. https://doi.org/10.1007/s11434-016-1113-z Shang, J.J., Sha, Z.B., Liang, J.Q., et al., 2014. Seep Gas Acoustic Features and Its Indication to Gas Hydrate Exploration on the Slope of the Northeastern South China Sea. Research of Eological South China Sea, 25-36(in Chinese with English abstract). Sultan, N., Cochonat, P., Foucher, J. P., et al. 2004. Effect of Gas Hydrates Dissociation on Seafloor Slope Stability. Submarine Mass Movements and Their Consequences-1st International Symposium, Springer Netherlands, 103-111. Tryon, M. D., Brown, K. M., Torres, M. E., 2002. Fluid and Chemical Flux in and out of Sediments Hosting Methane Hydrate Deposits on Hydrate Ridge, OR, II:Hydrological Processes. Earth and Planetary Science Letters, 201(3-4):541-557. https://doi.org/10.1016/s0012-821x(02)00732-x Tryon, M. D., Brown, K. M., Torres, M. E., et al., 1999. Measurements of Transience and Downward Fluid Flow near Episodic Methane Gas Vents, Hydrate Ridge, Cascadia. Geology, 27(12):1075. https://doi.org/10.1130/0091-7613(1999)027<1075:motadf>2.3.co;2 Tryon, M., Brown, K., Dorman, L., et al., 2001. A New Benthic Aqueous Flux Meter for very Low to Moderate Discharge Rates. Deep Sea Research Part I:Oceanographic Research Papers, 48(9):2121-2146. https://doi.org/10.1016/s0967-0637(01)00002-4 Vanneste, M., Sultan, N., Garziglia, S., et al., 2014. Seafloor Instabilities and Sediment Deformation Processes:The Need for Integrated, Multi-Disciplinary Investigations. Marine Geology, 352:183-214. https://doi.org/10.1016/j.margeo.2014.01.005 Wang, L., Wu, S. G., Li, Q. P., et al., 2014. Architecture and Development of a Multi-Stage Baiyun Submarine Slide Complex in the Pearl River Canyon, Northern South China Sea. Geo-Marine Letters, 34(4):327-343. https://doi.org/10.1007/s00367-014-0372-4 Wang, W. W., Wang, D. W., Wu, S. G., et al., 2018. Submarine Landslides on the North Continental Slope of the South China Sea. Journal of Ocean University of China, 17(1):83-100. https://doi.org/10.1007/s11802-018-3491-0 Wang, X.J., Wu, S.G., Dong, D.D., et al., 2011.Control of Mass Transport Deposits over the Occurrence of Gas Hydrate in Qiongdongnan Basin. Marine Geology & Quaternary Geology, 31(1):109-118(in Chinese with English abstract). http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=hydzydsjdz201101013 Wu, N.Y., Zhang, H.Q., Yang, S.X., et al., 2007.Preliminary Discussion on Natural Gas Hydrate (NGH) Reservoir System of Shenhu Area, North Slope of South China Sea. Natural Gas Industry, 27(9):1-6, 125(in Chinese with English abstract). http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=trqgy200709001 Wu, L.X., Liu, Q.N., Hu, D.X., et al., 2007.Variability of the Subtropical Gyre in North Pacific and Its Impacts on Dynamic Environment of China Marginal Seas. Advances in Earth Science, 22(12):1224-1230(in Chinese with English abstract). http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=dqkxjz200712002 Yang, S., Zhang, M., Liang, J, et al. 2015. Preliminary Results of China's Third Gas Hydrate Drilling Expedition:A Critical Step from Discovery to Development in the South China Sea. Methane Hydrate News Letter, 15(2):1-5. Yin, X. J., Zhou, H. Y., Yang, Q. H., alet, 2008. The Evidence for the Existence of Methane Seepages in the Northern South China Sea:Abnormal High Methane Concentration in Bottom Waters. Acta Oceanologica Sinica, 30(6):69-75(in Chinese with English abstract). Zhang, G.X., Liang, J.Q., Lu, J.G., et al., 2014.Characteristics of Natural Gas Hydrate Reservoirs on the Northeastern Slope of the South China Sea. Natural Gas Industry, 34(11):1-10(in Chinese with English abstract). http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=trqgy201411001 Zhang, H., Yang, S. X., Wu, N. Y., et al. 2007. Successful and Surprising Results for China's First Gas Hydrate Drilling Expedition. Methane Hydrate News Letter, 7(3):6-9. Zhang, G.X., Huang, Y.Y., Zhu, Y.H., et al., 2002.Prospect of Gas Hydrate Resources in the South China Sea. Marine Geology & Quaternary Geology, 22(1):75-81(in Chinese with English abstract). http://cn.bing.com/academic/profile?id=48f04cc6003cb7655f73ed4003070fc0&encoded=0&v=paper_preview&mkt=zh-cn Zhu, J. J., Xu, H. L., Qiu, X. L., et al., 2018. Crustal Structure and Rifting of the Northern South China Sea Margin:Evidence from Shoreline-Crossing Seismic Investigations. Geological Journal, 53(5):2065-2083. https://doi.org/10.1002/gj.3034 龚再升, 李思田, 谢泰俊, 等, 1997.南海北部大陆边缘盆地分析与油气聚集.北京:科学出版社. 李家彪, 主编, 2008.中国边缘海形成演化与资源效应.北京:海洋出版社. 李列, 宋海斌, 杨计海, 等, 2006.莺歌海盆地中央坳陷带海底天然气渗漏系统初探.地球物理学进展, 21(4):1244-1247. http://d.old.wanfangdata.com.cn/Periodical/dqwlxjz200604030 刘宝明, 牛滨华, 孙春岩, 等, 2007.南海北部陆缘晚期油气成藏机理及动力学过程.石油实验地质, 29(5):441-445. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=sysydz200705001 陆敬安, 杨胜雄, 吴能友, 等, 2008.南海神狐海域天然气水合物地球物理测井评价.现代地质, 22(3):447-451. http://d.old.wanfangdata.com.cn/Periodical/xddz200803015 孟祥君, 张训华, 韩波, 等, 2012.海底泥火山地球物理特征.海洋地质前沿, 28(12):6-9, 45. http://d.old.wanfangdata.com.cn/Periodical/hydzdt201212002 尚久靖, 沙志彬, 梁金强, 等, 2013.南海北部陆坡渗漏天然气的声学特征及其对水合物勘探的指示意义.南海地质研究, 25-36. http://www.cnki.com.cn/Article/CJFDTotal-NHDZ201300004.htm 王秀娟, 吴时国, 董冬冬, 等, 2011.琼东南盆地块体搬运体系对天然气水合物形成的控制作用.海洋地质与第四纪地质, 31(1):109-118. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=hydzydsjdz201101013 吴立新, 刘秦玉, 胡敦欣, 等, 2007.北太平洋副热带环流变异及其对我国近海动力环境的影响.地球科学进展, 22(12):1224-1230. http://d.old.wanfangdata.com.cn/Periodical/dqkxjz200712002 吴能友, 张海啟, 杨胜雄, 等, 2007.南海神狐海域天然气水合物成藏系统初探.天然气工业, 27(9):1-6, 125. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=trqgy200709001 尹希杰, 周怀阳, 杨群慧, 等, 2008.南海北部甲烷渗漏活动存在的证据:近底层海水甲烷高浓度异常.海洋学报, 30(6):69-75. http://d.old.wanfangdata.com.cn/Periodical/hyxb200806008 张光学, 黄永样, 祝有海, 等, 2002.南海天然气水合物的成矿远景.海洋地质与第四纪地质, 22(1):75-81. http://d.old.wanfangdata.com.cn/Periodical/hydzydsjdz200201012 张光学, 梁金强, 陆敬安, 等, 2014.南海东北部陆坡天然气水合物藏特征.天然气工业, 34(11):1-10. http://d.old.wanfangdata.com.cn/Periodical/trqgy201411001