| 不同预处理方法对尕海沉积物粒度测试的影响 |
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| 引用本文： | 李华勇,潘安定,明庆忠.不同预处理方法对尕海沉积物粒度测试的影响[J].干旱区地理,2011(4). |
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| 作者姓名： | 李华勇 潘安定 明庆忠 |
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| 作者单位： | 广州大学地理科学学院;云南师范大学旅游与地理科学学院;高原地理过程与环境云南省重点实验室; |
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| 基金项目： | 国家自然科学基金项目(批准号40671187/U0933604/40872118及2009CC007)资助 |
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| 摘 要： | 湖泊沉积物粒度是研究湖区古环境演化的一个重要代用指标,粒度测量结果与预处理方法密切相关。从柴达木尕海湖岩心钻孔取48个样品,采用五种预处理方法,运用马尔文2000激光粒度仪进行粒度分析。结果显示经过预处理后平均粒径有不同程度的变细。单独加入H2O2除去样品中的有机质后,粒度分散变细最为明显,变幅可达10%左右,单独加入(NaPO3)6或H2O2处理后,>63μm(粗颗粒组分)粒径百分含量降低8个百分点左右。单独加蒸馏水浸泡、单独加HCl除去碳酸盐类胶结物和先后加H2O2、HCl(、NaPO3)6处理这三种方法分散效果不明显。23～33号样品对预处理的灵敏度最差,其他样品灵敏度稍好,但总体上尕海湖沉积物对预处理作用不敏感。对于性质类似的盐湖沉积物粒度测试,本文推荐加H2O2进行预处理。
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| 关 键 词： | 粒度测试 预处理方法 分散效果 尕海沉积物 敏感度 |
Influence of test results of Gahai Lake sediment particle size under different pretreatment methods |
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| LI Hua-yong,,PAN An-ding,MING Qing-zhong.Influence of test results of Gahai Lake sediment particle size under different pretreatment methods[J].Arid Land Geography,2011(4). |
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| Authors: | LI Hua-yong PAN An-ding MING Qing-zhong |
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| Institution: | LI Hua-yong1,2,3,PAN An-ding1,MING Qing-zhong2,3 (1 School of Geography Science,Guangzhou University,Guangzhou 510006,Guangdong,China,2 School of Tourism & Geography Science,Yunnan Normal University,Kunming 650092,Yunnan,3 Yunnan Provincial Key Laboratory of Plateau geographic process and Environment Changes,China) |
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| Abstract: | The particle size character of lake sediments is an important substitution indicator to study the evolution of ancient environments around the lakes,and the particle size measurement results are closely related to the pretreatment methods.In this study,48 samples were chosen from Gahai Lake core drilled in the center of the Qaidam Basin,and each sample was pretreated in five methods,including the pretreating with distilled water-method A,pretreating with(NaPO3)6-method B,pretreating with H2O2-method C,pretr... |
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| Keywords: | particle size measurement pretreatment methods dispersion effect sediment in gahai Lake sensitivity |
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