查詢結果分析
相關文獻
- Distribution of B, Cl and Their Isotopes in Pore Waters Separated from Gas Hydrate Potential Areas, Offshore Southwestern Taiwan
- Methane Migration and Its Influence on Sulfate Reduction in the Good Weather Ridge Region, South China Sea Continental Margin Sediments
- 利用固態負離子源質譜術精確測量硼同位素
- Fractionation of Boron Isotopes by Ion Exchange Chro-Matography using 4-Vinylpyridine-Divinylbenzene Resins
- 橡膠木防蟲處理與藥劑呈色試驗法之現況分析
- 橡膠木防蟲處理與藥劑呈色試驗法之現況分析
- 新能源研究--臺灣西南海域天然氣水合物之探勘研究
- 臺灣西南海域天然氣水合物之探勘研究--高解析度震波測勘
- 新能源研究--臺灣西南海域天然氣水合物之震測資料處理與特殊分析
- 有機碳同位素製備效率對分析準確度之影響
頁籤選單縮合
題 名 | Distribution of B, Cl and Their Isotopes in Pore Waters Separated from Gas Hydrate Potential Areas, Offshore Southwestern Taiwan=臺灣西南海域天然氣水合物潛力區沈積物孔隙水中氯、硼及其同位素的分佈 |
---|---|
作 者 | 趙鴻椿; 游鎮烽; | 書刊名 | Terrestrial, Atmospheric and Oceanic Sciences |
卷 期 | 17:4 民95.12 |
頁 次 | 頁961-979 |
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; 天然氣水合物; 沈積物; 氯; 硼; 同位素; B isotopes; Cl isotopes; Pore waters; Gas hydrate; Organic matter degradation; |
語 文 | 英文(English) |
英文摘要 | Boron (B) and chlorine (Cl) are widely distributed on the Earth's surface and show distinctive geochemical behaviors. Cl behaves rather conservatively in oceanic environments while B is an excess-volatile and its distribution is sensitive to sediment absorption and organic matter degradation. The distribution of B, Cl and their isotopes in pore waters provide useful information for distinguishing between shallow circulation and deep origin fluid sources. Thirty-six sediment cores 0-5 m in length were sampled from a foreland accretionary prism offshore Southwestern Taiwan where strong bottom simulating reflectors (BSRs) and an abundance of mud diapers were discovered. More than 350 pore water samples were separated and analyzed for B, Cl and other major ions. Four long cores were selected for B and Cl isotopic analysis. We found that the Cl in all cores varied less than 10%, suggesting no major hydrate dissolution or formation involvement at shallow depths in the study area. However, the B concentration changed greatly, ranging between 360 and 650 μM, indicating a possible sedimentary contribution during the early diagenesis stage. The B isotopic compositions were relatively depleted (~25 to 37‰) in these pore waters, implying the addition of sedimentary exchangeable B with low δ 11B. The Cl isotopes showed rather large variations, more than 8‰, possibly related to the addition of deep situated fluids. In summary, the chemical and isotopic characteristics of pore waters separated from piston cores off Southwestern Taiwan suggest strong influence from organic matter degradation during diagenesis at shallow depths and the possible addition of deep fluids advecting through mud diapir channels at greater depths, causing a minor degree of hydrate dissolution/formation to occur at shallow depths. Further systematic investigation of pore waters δ^18O and δ D are needed in a future study. |
本系統中英文摘要資訊取自各篇刊載內容。