https://scholars.lib.ntu.edu.tw/handle/123456789/37155
標題: | 台灣西南海岸平原環境變遷後續研究─(子計畫四)台灣西南海岸岩心沈積物之穩定硫同位素研究(II) | 其他標題: | Preliminary Study of Stable Sulfur Isotope Analysis in Coastal Sedimentary Environment Evolution of Southwestern Taiwan | 作者: | 陳于高 | 關鍵字: | 義竹岩心;穩定硫同位素;全新世海侵;Yihju Core;Stable Sulfur Isotope;Holocene Transgression | 公開日期: | 1999 | 出版社: | 臺北市:國立臺灣大學地質科學系暨研究所 | 摘要: | 本研究選擇了義竹岩心進行了穩定硫 同位素分析,其中無機硫的含量於岩心深度100m 以上明顯高於其下部,應為全新世海侵的結果,不過依其平均值還原狀態雙硫化物的硫同位素結果顯示,深度-60m 以 上沈積速率變慢,硫酸根離子供應充裕,所以同位素値較輕,深度100m以下僅在-150m和-190m附近有較高之無機硫,另雙 硫化物之硫同位素值在-170m 處有一較輕的訊號,說明了-150m 至-190m 可能亦有海 陸變遷事件。有機硫僅在-190m 處>1mg/g ,而有機硫之同位素亦在此處顯示一 較輕的結果,說明了此時確有一海侵事件。 This study selected the Yihju core as target for stable sulfur isotope analysis. Our result demonstrates that in average the inorganic sulfur concentrations in the sediments above -100m are significant higher than of the below. This is probably resulted from the Holocene transgression. From the sedimentary environmental study, we know that between –40m and –60m is a lagoon environment, and the highest inorganic sulfur isotopic value can prove this conclusion. Among lower core, we found another interval with higher inorganic concentration; it is around depths of -180m and -190m, respectively. Also, a lighter signal of sulfur isotope was found at depth of -190m. These suggest there was a transgressional event happened between depths of -170m and -200m. For the organic sulfur analysis, we found two very light sulfur isotopic values at –60m and -190m. This proves that there are transgressional events indeed occurred at that time. |
URI: | http://ntur.lib.ntu.edu.tw//handle/246246/11721 | 其他識別: | 882116M002015 | Rights: | 國立臺灣大學地質科學系暨研究所 |
顯示於: | 地質科學系 |
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882116M002015.pdf | 30.53 kB | Adobe PDF | 檢視/開啟 |
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