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    黄土剖面古土壤和生物化石14C测年对比

    杨明生 张虎才 丁虎 雷国良 樊红芳 常凤琴 李斌 张文翔 牛洁 陈玥

    杨明生, 张虎才, 丁虎, 雷国良, 樊红芳, 常凤琴, 李斌, 张文翔, 牛洁, 陈玥, 2005. 黄土剖面古土壤和生物化石14C测年对比. 地球科学, 30(5): 589-596.
    引用本文: 杨明生, 张虎才, 丁虎, 雷国良, 樊红芳, 常凤琴, 李斌, 张文翔, 牛洁, 陈玥, 2005. 黄土剖面古土壤和生物化石14C测年对比. 地球科学, 30(5): 589-596.
    YANG Ming-sheng, ZHANG Hu-cai, DING Hu, LEI Guo-liang, FAN Hong-fang, CHANG Feng-qin, LI Bin, ZHANG Wen-xiang, NIU Jie, CHEN Yue, 2005. 14C Dating of Paleosol and Animal Remains in Loess Deposit: A Comparative Study. Earth Science, 30(5): 589-596.
    Citation: YANG Ming-sheng, ZHANG Hu-cai, DING Hu, LEI Guo-liang, FAN Hong-fang, CHANG Feng-qin, LI Bin, ZHANG Wen-xiang, NIU Jie, CHEN Yue, 2005. 14C Dating of Paleosol and Animal Remains in Loess Deposit: A Comparative Study. Earth Science, 30(5): 589-596.

    黄土剖面古土壤和生物化石14C测年对比

    基金项目: 

    国家自然科学基金项目 40371117

    中国科学院“百人计划”; 中国科学院西安地球环境研究所黄土与第四纪地质国家重点实验室基金项目 SKLLQG0514

    详细信息
      作者简介:

      杨明生(1976-),男,兰州大学资源环境学院自然地理专业环境变化方向硕博连读研究生.E-mail:yanggyb03@st.lzu.edu.en

    • 中图分类号: P53

    14C Dating of Paleosol and Animal Remains in Loess Deposit: A Comparative Study

    • 摘要: 精确、可靠测定古土壤和生物化石年代是重建环境变化过程、探讨人地关系的关键.研究古土壤中不同组分年代的异同对于分析土壤中碳附存状态和碳储存库十分重要.对甘肃省榆中县境内兴隆山典型黄土剖面采集的动物化石、土壤无机质、土壤有机质3个样品进行常规14C和AMS测年, 发现同一地层相同点样品不同组分的测年结果相差悬殊, 样品无机质比其有机质年龄(3682±70) a偏老2624a.对其14C测年可靠性对比分析发现, 常规14C和AMS对骨骼和牙齿化石测年相差仅为13a, 校正为日历年后几乎相等, 认为实验室产生的误差很小, 而碳的来源、组成及其“死碳”混入的比例是影响测年结果的主要因素.化石年龄与土壤有机质年龄之间的差别, 揭示该剖面可能存在持续时间达千年以上的沉积间断.由于同一层位骨化石、土壤有机质、土壤无机质14C测年结果差异, 在进行化石年代确定、考古及古文明研究、生态植被恢复、土壤无机碳存储库研究中, 年龄的界定应选择相应的测年数据.

       

    • 图  1  剖面位置(单位: m)

      Fig.  1.  Location of studied section

      图  2  样品胡敏素和胡敏酸提取流程(刘嘉麒等, 1994)

      Fig.  2.  Humic and humic acid extraction procedures of the specimens

      图  3  剖面粒度实验结果及采样位置(阴影部分)

      Fig.  3.  Grain-size of studied section and sampling position

      图  4  黄土古土壤无机碳来源(a) 和有机碳来源(b)

      Fig.  4.  Sources of inorganic carbon (a) and source of organic carbon (b) in loess-paleaosol

      表  1  不同样品(组分)14C测年结果

      Table  1.   14C dating result

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    • 收稿日期:  2005-05-17
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