| 松嫩平原北部黑土区地表基质层地球化学特征及对黑土物源的指示意义 |
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| 引用本文：李俊华,侯红星,王 伟,任柄璋,张贵钢,李 明,齐 力,杜 欣,时凌峰,詹泽东,西广越.2025.松嫩平原北部黑土区地表基质层地球化学特征及对黑土物源的指示意义[J].地球学报,46(4):827-840. |
| DOI：10.3975/cagsb.2024.120602 |
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| 作者 | 单位 | E-mail | | 李俊华 | 中国地质调查局廊坊自然资源综合调查中心, 河北廊坊 065000 | 2324360052@qq.com | | 侯红星 | 中国地质调查局廊坊自然资源综合调查中心, 河北廊坊 065000 | wjhjhhx@163.com | | 王 伟 | 中国地质调查局廊坊自然资源综合调查中心, 河北廊坊 065000 | | | 任柄璋 | 中国地质调查局廊坊自然资源综合调查中心, 河北廊坊 065000 | | | 张贵钢 | 自然资源部自然资源调查监测司, 北京 100812 | | | 李 明 | 自然资源部自然资源调查监测司, 北京 100812 | | | 齐 力 | 四平现代农业科学院, 吉林梨树 136000 | | | 杜 欣 | 四平现代农业科学院, 吉林梨树 136000 | | | 时凌峰 | 中国地质调查局廊坊自然资源综合调查中心, 河北廊坊 065000 | | | 詹泽东 | 中国地质调查局廊坊自然资源综合调查中心, 河北廊坊 065000 | | | 西广越 | 中国地质调查局廊坊自然资源综合调查中心, 河北廊坊 065000 | |
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| 基金项目:中国地质调查局项目“苏北平原1:25万地表基质调查”(编号: DD20242041) |
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| 中文摘要:黑土及其母质作为特殊的沉积物, 研究其物源特征对黑土地的保护利用工作具有重要意义, 但现有研究对此方面的关注依然较少。笔者在松嫩平原北部选取黑土层肥沃且深厚的克东县等五个县作为研究区, 基于地表基质调查工作获取了黑土层+非砂土层, 黑土层+砂土层两种地表基质层构型的地球化学数据, 对黑土层与母质层样品的地表基质类型、地球化学元素特征进行对比分析, 并探讨了物源特征。结果表明, 黑土层地表基质类型以壤土为主(占92%), 母质层以黏土为主(占67%), 其次为壤土(占24%); 黑土层(下伏非砂土)有机质平均含量为3.23%, 显著高于母质层(非砂土)的0.93%; 从主量与微量元素地球化学特征上看, 黑土层(下伏非砂土)对母质层(非砂土)具有很好的物质继承性, 但黑土层(下伏砂土)对母质层(砂土)不具有物质继承关系; 研究区黑土及母质(非砂土)主要是由松嫩沙地作为物源通过风力作用搬运、沉积形成, 沉积物形成过程中, 经历了一定程度的再循环作用过程; 黑土下伏的砂土在地球化学特征上与黑土显著不同, 这些砂土应主要来自于小兴安岭地区。因此, 黑土地地表基质层地球化学性质的调查与研究工作有助于加深我们对黑土形成演化历史的了解。 |
| 中文关键词:黑土层 地球化学特征 物源特征 松嫩平原 地表基质 |
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| Geochemical Characteristics of the Ground Substrate Layer in the Black Soil Area of the Northern Songnen Plain and Its Implications for the Provenance of Black Soil |
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| Abstract:Black soil and its parent material are special sediments, and studying their provenance characteristics has great significance for the protection and utilization of black soil. However, existing research has paid little attention to this field. In the northern Songnen Plain, the author selected Kedong County and other four counties with a rich and deep black soil layer as the research subject. Based on the geochemical data of the black soil layer and the parent material layer obtained from the ground substrate survey, the ground substrate types and geochemical element characteristics of the black soil layer and the parent material layer were compared and the provenance characteristics were evaluated. The results showed that loam is the main type of ground substrate in the black soil layer (92%) and that clay is the main type of ground substrate in the parent material layer (67%), followed by loam (24%). The average organic matter content in the black soil layer (underlying non-sand) is 3.23%, which is significantly higher than the content in the parent material layer (non-sand), which is 0.93%. The black soil layer (underlying non-sand) has good material inheritance to the parent material layer (non-sand), but the black soil layer (underlying sand) has no material inheritance to the parent material layer (sandy soil). The black soil and parent material (non-sand) have an aeolian origin, and the Songnen Sandy Land is the main provenance of the study area. During the formation process, the sediment underwent a certain degree of recycling. The sandy soil under the black soil obviously has different geochemical characteristics than the black soil and likely came mainly from the Lesser Khingan Mountains area. This investigation of the geochemical properties of the ground substate layer deepens our understanding of the formation and evolution history of black soil. |
| keywords:black soil geochemical characteristics provenance characteristics Songnen Plain ground substrate layer |
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