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題 名 | Geochemical Study on Hydrocarbon Gases in Seafloor Sediments, Southwestern Offshore Taiwan--Implications in the Potential Occurrence of Gas Hydrates=臺灣西南海域海底沉積物中碳氫化合物氣體的地化研究--在天然氣水合物的意義 |
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作 者 | 翁榮南; 李貞瑩; 李昭興; 郭政隆; | 書刊名 | Terrestrial, Atmospheric and Oceanic Sciences |
卷 期 | 17:4 民95.12 |
頁 次 | 頁921-931 |
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; 沉積物; 碳氫化合物; 天然氣水合物; Hydrocarbon gas; Gas hydrate; Headspace gas analysis; Southwestern offshore Taiwan; |
語 文 | 英文(English) |
英文摘要 | Seafloor sediment samples collected from southwestern offshore Taiwan have been analyzed for hydrocarbon gases resident in samples by using the technique of headspace gas analysis. The results reveal that the gas content is in tens to thousands ppm (vol. in wet sediments). Both microbial gas (usually called biogenic gas) dominated with methane and thermogenic gas containing C2 + hydrocarbons were detected, inferring that the gases involved in the potential gas hydrate occurrence in the study area may have multiple origins. The microbial gas generated by methanogenic archaea in immature sediments is more widely distributed than thermogenic gas generated in sediments of the catagenesis stage. The presence of thermogenic gas infers an effective petroleum system, which may favor the formation of gas hydrate as well as for oil and gas exploration. |
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