东海周边中小型河流沉积物锶钕铅同位素组成及其物源示踪意义
发布时间：2019-06-02 22:24
【摘要】：通过对东海周边9条中小型河流沉积物进行锶钕铅(Sr-Nd-Pb)同位素测试,分析了其组成特征及其物源指示意义。结果表明,~(87)Sr/~(86)Sr、~(143)Nd/~(144)Nd、~(206)Pb/~(204)Pb平均值分别为0.719 056、0.512 056和18.614 94。Sr-Nd-Pb同位素组成主要受地质背景和风化作用的制约,空间变化规律明显,可作为区分不同来源河流沉积物的有效指标。统计结果确立出三个端元值,分别为台湾岛东部河流(~(87)Sr/~(86)Sr-0.713 355,ε_(Nd)--8.488)、台湾西部河流(~(87)Sr/~(86)Sr-0.718 804,ε_(Nd)--12.375 7)和大陆东南部河流(~(87)Sr/~(86)Sr-0.722 195,ε_(Nd)--11.944 4)。确立这些端元可为认识中国东部陆架区沉积物"源-汇"过程及陆海相互作用提供科学依据。
[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.
【作者单位】： 青岛海洋地质研究所国土资源部油气资源和环境地质重点实验室;国家海洋局第一海洋研究所海洋沉积与环境地质国家海洋局重点实验室;青岛海洋科学与技术国家实验室海洋地质过程与环境功能实验室;青岛海洋科学与技术海洋国家实验室海洋矿产资源评价与探测技术功能实验室;
【基金】：国家海洋局青年海洋科学基金(2013310) 全球变化与海气相互作用专项(GASI-GEOGE-03) 国家自然科学基金(41106063) 国土资源大调查项目(GZH201400201;GZH201300501)
【分类号】：P736.21
本文编号：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.
【作者单位】： 青岛海洋地质研究所国土资源部油气资源和环境地质重点实验室;国家海洋局第一海洋研究所海洋沉积与环境地质国家海洋局重点实验室;青岛海洋科学与技术国家实验室海洋地质过程与环境功能实验室;青岛海洋科学与技术海洋国家实验室海洋矿产资源评价与探测技术功能实验室;
【基金】：国家海洋局青年海洋科学基金(2013310) 全球变化与海气相互作用专项(GASI-GEOGE-03) 国家自然科学基金(41106063) 国土资源大调查项目(GZH201400201;GZH201300501)
【分类号】：P736.21
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