| 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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| 关键词:black soil geochemical characteristics provenance characteristics Songnen Plain ground substrate layer |
| 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) |
| 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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| 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 |
| 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. |
| LI Junhua,HOU Hongxing,WANG Wei,REN Bingzhang,ZHANG Guigang,LI Ming,QI Li,DU Xin,SHI Lingfeng,ZHAN Zedong,XI Guangyue.2025.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[J].Acta Geoscientica Sinica,46(4):827-840. |
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