地球学报2025，Vol.46Issue(4)：827-840,14.DOI:10.3975/cagsb.2024.120602
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
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
摘要
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.关键词
黑土层/地球化学特征/物源特征/松嫩平原/地表基质Key words
black soil/geochemical characteristics/provenance characteristics/Songnen Plain/ground substrate layer分类
天文与地球科学引用本文复制引用
李俊华,詹泽东,西广越,侯红星,王伟,任柄璋,张贵钢,李明,齐力,杜欣,时凌峰..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,2025,46(4):827-840,14.基金项目
本文由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)资助. This study was supported by China Geological Survey(No.DD20242041). （编号:DD20242041）
