| 长江和黄河河口沉积物中石英氧同位素的对比 |
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| 引用本文： | 乔淑卿, 杨作升, 李云海, 陈晓辉. 长江和黄河河口沉积物中石英氧同位素的对比[J]. 海洋地质与第四纪地质, 2006, 26(3): 15-19. |
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| 作者姓名： | 乔淑卿 杨作升 李云海 陈晓辉 |
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| 作者单位： | 中国海洋大学 河口海岸带研究所, 青岛 266003 |
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| 基金项目： | 国家自然科学基金重大研究计划(90211022) |
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| 摘 要： | 采用硫酸氢钾(KHSO4)熔融-六氟硅酸(H2SiF6)浸泡的化学方法分离出长江、黄河河口不同粒级沉积物中的石英矿物,使用BrF5为氧化剂提取出石英矿物中的氧,在质谱计上测定石英中氧同位素比值(δ18O值),结果表明:同一沉积物样品中随粒度由粗变细,石英δ18O值逐渐增加,长江河口沉积物中石英的δ18O值比黄河河口沉积物中的稍高,两条河流河口沉积物中相同粒级石英δ18O值差别主要受流域沉积物物质来源和流域的气候环境差异的影响。
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| 关 键 词： | 石英 沉积物 氧同位素比值 长江 黄河 |
| 文章编号： | 0256-1492(2006)03-0015-05 |
| 收稿时间： | 2005-10-19 |
| 修稿时间： | 2005-10-19 |
OXYGEN ISOTOPE OF QUARTZ IN SEDIMENTS FROM THE YANGTZE (CHANGJIANG) AND YELLOW(HUANGHE) RIVERS |
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| QIAO Shu-qing, YANG Zuo-sheng, LI Yun-hai, CHEN Xiao-hui. OXYGEN ISOTOPE OF QUARTZ IN SEDIMENTS FROM THE YANGTZE (CHANGJIANG) AND YELLOW(HUANGHE) RIVERS[J]. Marine Geology & Quaternary Geology, 2006, 26(3): 15-19. |
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| Authors: | QIAO Shu-qing YANG Zuo-sheng LI Yun-hai CHEN Xiao-hui |
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| Affiliation: | Institute of Estuarine Coastal Studies, Ocean University of China, Qingdao 266003, China |
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| Abstract: | Quartz in sediments from the Yangtze and Yellow Rivers was separated by potassium hydrogen sulfate (KHSO4) fusing-hydrofluorosilic acid (H2SiF6). Oxygen was extracted from the quartz fraction by BrF5 (used as oxidant), and then its isotopic composition was analyzed by mass-spectrometer, expressed as δ18O (18O/16O)values (relative to SMOW). The results show that δ18O values generally increase with grain size of quartz changing from coarse to fine. The oxygen isotope ratios (δ18O) of quartz from the Yangtze River are higher than those from the Yellow River. The differences in δ18O values of the same grain-size quartz between the Yangtze and Yellow Rivers may have resulted from different sediment sources and climate conditions along these two river basins. |
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| Keywords: | quartz sediment oxygen isotope ratio the Yangtze River the Yellow River |
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