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題名 | Distribution of Gassy Sediments and Mud Volcanoes Offshore Southwestern Taiwan=臺灣西南海域含氣沉積物及海底泥火山的分布 |
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作者 | 邱瑞焜; 曾威豪; 劉家瑄; | 書刊名 | Terrestrial, Atmospheric and Oceanic Sciences |
卷期 | 17:4 民95.12 |
頁次 | 頁703-722 |
專輯 | 南海與臺灣鄰近地區之天然氣水合物研究專刊 |
分類號 | 351.983 |
關鍵詞 | 臺灣西南海域; 含氣沉積物; 泥火山; Gassy sediment; Mud volcano; Fluid migration; Offshore southwestern Taiwan; |
語文 | 英文(English) |
英文摘要 | This study presents the results from recent intense marine geophysical surveys conducted offshore of southwestern Taiwan. Mud volcanoes and gassy sediments have been identified along chirp sonar and seismic reflection profile data. The distribution of gassy sediments and mud volcanoes has been compiled, showing these features extending from the accretionary wedge to the passive China continental margin. Submarine mud volcanoes could be grouped into four main clusters in the accretionary wedge province: offshore Kaohsiung, adjacent to the Kaoping Submarine Canyon, near the head of the Fangliao Submarine Canyon and along the Yung-An Lineament. Each cluster is composed of a few to more than 10 submarine mud volcanoes. Their origin could be related to gas hydrate dissociation with rising high-pressure fluid along faults or mud diapir piercing the seafloor. These gassy sediments and mud volcanoes could be formed by fluids escaping from dewatering sedimentary layers of mud diapirs, or along faults and fractures where free gases or gases dissociating from hydrates migrate to the seafloor. |
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