中国地质2025，Vol.52Issue(2)：714-726,13.DOI:10.12029/gc20210423003
基于土地质量调查结果探讨雄安新区第四系沉积相元素组成特征与物质来源
Discussion on the element composition characteristics and material sources of Quaternary sedimentary facies based on the land quality survey results in Xiong'an New Area
摘要
Abstract
This paper is the result of environmental geological survey engineering. [Objective]This paper aims to investigate the distribution characteristics,the contents and distribution of soil elements in different sedimentary facies of Quaternary,the control factors and the sources of sediment materials in Xiong'an New Area,and to provide geochemical bases for the study of regional palaeogeographic evolution and epigenetic geochemical environments.[Methods]Based on the surface element content data obtained from the geochemical survey and monitoring of land quality in Xiong'an New Area,this study employs multivariate statistical methods(such as elemental content analysis and ratio tracing)to reveal the relationship between regional elemental geochemical distribution patterns and the epigenetic environment.[Results]The soil in the alluvial-lacustrine plain subregion has the characteristics of low value of SiO2 and Na2O,and high value of Al2O3,Fe2O3,MgO,CaO,K2O and Na/Rb.The soil in the alluvial-diluvial plain subregion is characterized by high SiO2 and Na2O,and low Al2O3,Fe2O3 and Ca/Ba.The distribution of soil geochemical major elements is primarily controlled by chemical weathering intensity of source sediments,while epigenetic environment also influences the depletion and enrichment of major elements.The source area is currently in the stage of moderate chemical weathering dominated by plagioclase weathering,with no evidence of potassium metasomatism in weathering products.The soil parent materials in each sedimentary facies are mainly derived from the mature continental quartz source of Taihang uplift on the west side of Xiong'an New Area.Additionally,in the subregion of alluvial plain,parent materials of a small proportion of samples are from mafic volcanic and neutral igneous rocks.[Conclusions]Geochemical indicators such as soil element contents,element ratios and element combinations(Rb-U-Ga,Fe-Mg-Ni-V)can effectively differentiate sedimentary facies environments in the study area and serve as reliable tracers for soil parent material properties.关键词
表层土壤/地球化学指标/沉积相/物源示踪/环境地质调查工程/雄安新区Key words
surface soil/geochemical index/sedimentary facies/provenance identification/environmental geological survey engineering/Xiong'an New Area分类
农业科技引用本文复制引用
周亚龙,郭志娟,王乔林,刘飞,王成文,宋云涛..基于土地质量调查结果探讨雄安新区第四系沉积相元素组成特征与物质来源[J].中国地质,2025,52(2):714-726,13.基金项目
中国地质调查局项目(DD20189123、DD20230543)资助. Supported by the projects of China Geological Survey(No.DD20189123,No.DD20230543). （DD20189123、DD20230543）
