東海周邊中小型河流沉積物鍶釹鉛同位素組成及其物源示蹤意義
發(fā)布時間：2019-06-02 22:24
【摘要】：通過對東海周邊9條中小型河流沉積物進行鍶釹鉛(Sr-Nd-Pb)同位素測試,分析了其組成特征及其物源指示意義。結(jié)果表明,~(87)Sr/~(86)Sr、~(143)Nd/~(144)Nd、~(206)Pb/~(204)Pb平均值分別為0.719 056、0.512 056和18.614 94。Sr-Nd-Pb同位素組成主要受地質(zhì)背景和風化作用的制約,空間變化規(guī)律明顯,可作為區(qū)分不同來源河流沉積物的有效指標。統(tǒng)計結(jié)果確立出三個端元值,分別為臺灣島東部河流(~(87)Sr/~(86)Sr-0.713 355,ε_(Nd)--8.488)、臺灣西部河流(~(87)Sr/~(86)Sr-0.718 804,ε_(Nd)--12.375 7)和大陸東南部河流(~(87)Sr/~(86)Sr-0.722 195,ε_(Nd)--11.944 4)。確立這些端元可為認識中國東部陸架區(qū)沉積物"源-匯"過程及陸海相互作用提供科學(xué)依據(jù)。
[Abstract]:Strontium neodymium lead (Sr-Nd-Pb) isotopic measurements were carried out on the sediments of nine small and medium-sized rivers around the East China Sea, and their composition characteristics and provenance indication significance were analyzed. The results show that ~ (87) Sr/~ _ (86) Sr,~ _ (143) Nd/~ _ (144) Nd, The average value of ~ (206) Pb/~ _ (204) Pb is 0.719. The isotopic composition of 0.512056 and 18.614 94.Sr-Nd-Pb is mainly restricted by geological background and weathering, and the spatial variation is obvious. It can be used as an effective index to distinguish river sediments from different sources. The statistical results show that there are three terminal values, which are (~ (87) Sr/~ (86) Sr-0.713 355, 蔚 _ (Nd)-8.488) in the eastern part of Taiwan Island and (~ (87) Sr/~ (86) Sr-0.718 804) in the western part of Taiwan. E _ (Nd)-12.375 7) and southeast continental rivers (~ (87) Sr/~ (86) Sr-0.722 195, 蔚 _ (Nd)-11.944 4). The establishment of these end elements can provide scientific basis for understanding the source-sink process of sediments and land-sea interaction in the shelf area of eastern China.
【作者單位】： 青島海洋地質(zhì)研究所國土資源部油氣資源和環(huán)境地質(zhì)重點實驗室;國家海洋局第一海洋研究所海洋沉積與環(huán)境地質(zhì)國家海洋局重點實驗室;青島海洋科學(xué)與技術(shù)國家實驗室海洋地質(zhì)過程與環(huán)境功能實驗室;青島海洋科學(xué)與技術(shù)海洋國家實驗室海洋礦產(chǎn)資源評價與探測技術(shù)功能實驗室;
【基金】：國家海洋局青年海洋科學(xué)基金(2013310) 全球變化與海氣相互作用專項(GASI-GEOGE-03) 國家自然科學(xué)基金(41106063) 國土資源大調(diào)查項目(GZH201400201;GZH201300501)
【分類號】：P736.21
本文編號：2491459
[Abstract]:Strontium neodymium lead (Sr-Nd-Pb) isotopic measurements were carried out on the sediments of nine small and medium-sized rivers around the East China Sea, and their composition characteristics and provenance indication significance were analyzed. The results show that ~ (87) Sr/~ _ (86) Sr,~ _ (143) Nd/~ _ (144) Nd, The average value of ~ (206) Pb/~ _ (204) Pb is 0.719. The isotopic composition of 0.512056 and 18.614 94.Sr-Nd-Pb is mainly restricted by geological background and weathering, and the spatial variation is obvious. It can be used as an effective index to distinguish river sediments from different sources. The statistical results show that there are three terminal values, which are (~ (87) Sr/~ (86) Sr-0.713 355, 蔚 _ (Nd)-8.488) in the eastern part of Taiwan Island and (~ (87) Sr/~ (86) Sr-0.718 804) in the western part of Taiwan. E _ (Nd)-12.375 7) and southeast continental rivers (~ (87) Sr/~ (86) Sr-0.722 195, 蔚 _ (Nd)-11.944 4). The establishment of these end elements can provide scientific basis for understanding the source-sink process of sediments and land-sea interaction in the shelf area of eastern China.
【作者單位】： 青島海洋地質(zhì)研究所國土資源部油氣資源和環(huán)境地質(zhì)重點實驗室;國家海洋局第一海洋研究所海洋沉積與環(huán)境地質(zhì)國家海洋局重點實驗室;青島海洋科學(xué)與技術(shù)國家實驗室海洋地質(zhì)過程與環(huán)境功能實驗室;青島海洋科學(xué)與技術(shù)海洋國家實驗室海洋礦產(chǎn)資源評價與探測技術(shù)功能實驗室;
【基金】：國家海洋局青年海洋科學(xué)基金(2013310) 全球變化與海氣相互作用專項(GASI-GEOGE-03) 國家自然科學(xué)基金(41106063) 國土資源大調(diào)查項目(GZH201400201;GZH201300501)
【分類號】：P736.21
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1 ;愛達荷鈷帶水成苔蘚和河流沉積物中的銅和鈷[J];國外地質(zhì)勘探技術(shù);1984年08期
，本文編號：2491459
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