| 东沙海区泥火山调查进展* |
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| 引用本文： | 阎贫,王彦林,于俊辉,罗伟,刘兴健,靳永斌,李鹏春,刘杰,钟广见,易海.东沙海区泥火山调查进展*[J].热带海洋学报,2021,40(3):34-43. |
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| 作者姓名： | 阎贫 王彦林 于俊辉 罗伟 刘兴健 靳永斌 李鹏春 刘杰 钟广见 易海 |
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| 作者单位： | 1.中国科学院边缘海与大洋地质重点实验室(南海海洋研究所), 南海生态环境工程创新研究院, 广东 广州 5103012.南方海洋科学与工程广东省实验室(广州), 广东 广州 51114583.中国科学院海洋地质与环境重点实验室, 山东 青岛 2660714.中海石油(中国)有限公司深圳分公司, 广东 深圳 5180545.中国科学院大学, 北京, 1000496.广州海洋地质调查局, 广东 广州 510760 |
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| 基金项目： | 国家自然科学基金(U1901217);国家自然科学基金(91855101);国家自然科学基金(41876052);南方海洋科学与工程广东省实验室(广州)人才团队引进重大专项(GML2019ZD0104);广东省特支计划(2019BT02H594);“科学”号高端用户项目(KEXUE2019G10);中国科学院海洋地质与环境重点实验室开放基金课题(MGE2018KG14);自然资源部地质调查专项(DD20190212);广东省自然科学基金(2018A0303130125) |
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| 摘 要： | 泥火山是地球运动和深部含流体物质向表层迁移的一种重要形式, 其喷溢及喷出物对认识地质动力、地层岩性和资源环境具有重要的意义。东沙海区新生界薄(~1km), 中生界厚(>5km), 是南海最典型的中生代沉积区和油气勘探待突破区。区内有众多的海山海丘, 过去都被推测为不利于油气成藏的岩浆火山。但近年来针对这些海山进行的调查发现了大量海底地层底辟形变与断裂、流体充注空白反射带和喷溢释放结构。通过浅表层取样采获了丰富的自生碳酸盐岩结核及深水珊瑚、海绵等生物, 表明众多海山、海丘具有明显的泥火山活动特征。东沙泥火山的发现表明区内具有良好的油气生成和运移条件, 为勘探源于中生界的油气和水合物提供了重要线索; 而大量深水珊瑚和海绵的出现指示东沙泥火山区可能是深水珊瑚礁、海绵礁发育区, 为研究油气泄漏、化养生物和环境三者的关系提供了重要的研究对象。
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| 关 键 词： | 东沙海区 泥火山 深水珊瑚 自生碳酸盐岩 油气与可燃冰勘探 中生界 |
| 收稿时间： | 2020-11-26 |
| 修稿时间： | 2020-12-13 |
Surveying mud volcanoes over the Dongsha Waters in the South China Sea |
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| YAN Pin,WANG Yanlin,YU Junhui,LUO Wei,LIU Xingjian,JIN Yongbin,LI Pengchun,LIU Jie,ZHONG Guangjian,YI Hai.Surveying mud volcanoes over the Dongsha Waters in the South China Sea[J].Journal of Tropical Oceanography,2021,40(3):34-43. |
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| Authors: | YAN Pin WANG Yanlin YU Junhui LUO Wei LIU Xingjian JIN Yongbin LI Pengchun LIU Jie ZHONG Guangjian YI Hai |
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| Abstract: | As an important expression of Earth’s movement and a migration way for fluid-rich materials from substrates to the surface, mud volcanism and the entrained materials carry with ample information that is important for understanding the geodynamics, stratigraphic lithology, resources, and environment. Featuring thin (~1 km) Cenozoic Erathem and considerably thick (>5 km) Mesozoic Erathem, the Dongsha Waters is deemed as the best but unproven prospect for petroleum sourced from the Mesozoic Erathem. It is also rich with seamounts and submarine hills that are believed as magmatic volcanoes, a potential risk factor for petroleum accumulation. However, it is revealed from recent geophysical surveys that many of the seamounts and hills have developed with remarkable diapiric deformation and faults, fluid infill-led blank reflection zone, fluid seepage, and emission. By sampling with box dredges over tens of seamount and hill, plentiful authigenic carbonate nodules and deep-water corals, sponges, etc., have been collected, which feature them mud volcanoes. Discovery of the mud volcanoes shows favorable conditions for petroleum source and migration over the waters, and provides excellent lines to explore the petroleum and gas hydrates sourced from the Mesozoic Erathem. Abundance of deep-sea coral, sponge and others implies the Dongsha mud volcanoes as potential province for deep-sea coral and sponge reefs, meaningful to study the relationship among petroleum seepage, growth of chemosynthetic community and marine environment. |
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| Keywords: | Dongsha Waters mud volcano deep-water coral authigenic carbonates petroleum and hydrate prospect Mesozoic Erathem |
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