| 南海北部神狐海域地质环境综合调查及科学意义 |
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| 引用本文： | 朱俊江,李三忠,陆敬安,康冬菊,牟泽霖,赵彦彦,陈朝晖,张晓华,杨国明,吴佳庆,宋德磊,王长盛,熊梓翔.南海北部神狐海域地质环境综合调查及科学意义[J].地球科学,2020,45(4):1416-1426. |
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| 作者姓名： | 朱俊江 李三忠 陆敬安 康冬菊 牟泽霖 赵彦彦 陈朝晖 张晓华 杨国明 吴佳庆 宋德磊 王长盛 熊梓翔 |
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| 作者单位： | 1.海底科学与探测技术教育部重点实验室, 中国海洋大学海洋地球科学学院, 山东青岛 266100 |
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| 基金项目： | 广州海洋地调查局地质调查项目2018c-03-186广州海洋地调查局地质调查项目20190226青岛海洋科学与技术试点国家实验室海洋矿产资源评价与探测技术功能实验室自主课题资助项目MMRZZ201802山东省自然科学基金面上项目ZR2019MD036国家自然科学基金重点项目41831280国家自然科学基金重点项目91958284中国海洋大学人才工程项目201812016山东省泰山学者特聘教授项目、国家重点研发计划2017YFC0601400-1 |
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| 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.
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| 关 键 词： | 南海神狐海域 天然气水合物 海底地震仪 水下滑翔机 箱式和重力活塞沉积样 海洋物理环境 海洋地质学 |
| 收稿时间： | 2019-05-22 |
Scientific Implications and Preliminary Surveying Results of Geological and Physical Oceanography Environment in the Shenhu Area of the Northern South China Sea |
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| 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. |
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