| 甜水沟全新世黄土-古土壤序列风化程度及意义 |
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| 引用本文： | 王丽娟,庞奖励,黄春长,丁敏,牛晓露,李艳华.甜水沟全新世黄土-古土壤序列风化程度及意义[J].地理科学进展,2011,30(3):379-384. |
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| 作者姓名： | 王丽娟 庞奖励 黄春长 丁敏 牛晓露 李艳华 |
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| 作者单位： | 陕西师范大学旅游与环境学院; |
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| 基金项目： | 国家自然基金重点项目(41030637); 中央高校基本科研业务费专项基金项目(GK200901007) |
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| 摘 要： | 对大荔人遗址的甜水沟剖面(TSG)全新世黄土-古土壤序列中常量元素含量、磁化率和Rb/Sr比值进行了研究和比对。结果表明:在TSG剖面发育过程中,Ca、Mg、Na表现为迁移淋失,Si、K呈现弱富集特征,Fe的迁移不明显;磁化率、钾钠比、硅铝铁率、SiO2/(MgO+CaO)(、CaO+K2O+Na2O)/Al2O3的分布随地层的变化而同步变化。上述变化指示古土壤S0形成时期,化学风化程度强烈和气候温暖湿润,黄土L0和Lt堆积时期,风化成壤作用较弱和气候相对干旱,而全新世晚期可能曾出现过一次较为暖湿的次级气候变化。
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| 关 键 词： | 风化程度 黄土 古土壤 全新世 大荔人遗址 甜水沟 |
Weathering Intensity of the TSG Holocene Loess-paleosol Sequence and Its Significance |
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| WANG Lijuan,PANG Jiangli,HUANG Chunchang,DING Min,NIU Xiaolu,LI Yanhua.Weathering Intensity of the TSG Holocene Loess-paleosol Sequence and Its Significance[J].Progress in Geography,2011,30(3):379-384. |
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| Authors: | WANG Lijuan PANG Jiangli HUANG Chunchang DING Min NIU Xiaolu LI Yanhua |
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| Institution: | (College of Tourism and Environmental Sciences,Shaanxi Normal University,Xi’an 710062,China) |
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| Abstract: | A Holocene loess-paleosol sequence was found at Tian-shui-gou(TSG) site,Dali.A detailed study on contrast the contents of major elements,magnetic susceptibility and Rb/Sr ratio was conducted in this paper to explore the environmental features in the Holocene.The analytical results show that Ca,Mg and Na are leached,Si and K are relatively enriched,but the transport phenomenon of Fe is not obvious.The distributions of magnetic susceptibility,Rb/Sr ratio,SiO2/(Al2O3+Fe2O3),SiO2/(MgO+CaO) and(CaO+K2O+Na2O)/Al2... |
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| Keywords: | weathering intensity loess paleosol Holocene Dali Tian-shui-gou |
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