Characters of North-West Mud Diapirs Volcanoes in South China Sea and Relationship between Them and Accumulation and Migration of Oil and Gas

• 责任者：He Jiaxiong (Key Laboratory of Marginal Sea Geology ; Guangzhou Institute of Geochemistry ; Chinese Academy of Sciences ; Guangzhou 510640 ; China) ; Zhu Youhai
• 刊名：Earth Science
• 出版年：2010
• 卷期：35(1)
• 关键词：油气运移 ; oil and gas migration ; 油气聚集 ; oil and gas accumulation ; 底辟构造 ; diapirs ; 泥火山 ; mud volcanoes ; 莺歌海盆地 ; Yinggehai Basin ; 台西南盆地 ; Southwest Taiwan Basin
• 页码：p.75-86
• 图表：7 illus., 34 refs.
• 分类号：1003
• issnNo：ISSN1000-2383
• isbnNo：CN42-1233/P

It has geological and mode of occurrence differences between mud diapirs and mud volcanoes though the similar genesis and the characters of evolution and development. Mud diapirs in Yinggehai basin located in the central deep depression, appeared on five north-west lines and had characters of low density, low wave velocity, high temperature and high pressure however mud volcanoes in Southwest Taiwan Basin located in the continental deep-water distract in the south depression and Tainan-Kaohsiung distract in Taiwan. It located along the discordogenic fault and usually had calderas also sea floors. Mud diapirs and mud volcanoes had many styles of accompanying gas to be mainly of the mature-post mature coaliferous gas and had abundence CO₂ and N₂ to be mainly of the inorganic-crustal CO₂.