成都盆地浅层土壤中磷的分布特征及来源分析  

Distributions and Sources of Phosphorus in Surface Soils of Chengdu Basin

作　　者：潘苏红[1] 何玉生[1] 龚敏[1] 任利民[2] 陶鲜[2] 马振东[2] 

机构地区：[1]中国地质大学研究生院 [2]中国地质大学地球科学学院,武汉430074

出　　处：《地质科技情报》2006年第3期97-100,共4页Geological Science and Technology Information

基　　金：中国地质调查局国土资源综合调查子项目资助(200314200017)

摘　　要：选取四川成都盆地浅层土壤为研究对象,将研究区分为龙门山区、盆周丘陵区和平原区3个区,通过等值线图得出磷的大面积异常区分布在人口密度大、工农业发达的平原区。并依据浅层土壤中关系较密切的3类基本元素组合共16种元素进行因子分析,得出成都盆地平原区浅层土壤中磷来自:①龙门山的震旦纪、寒武纪、泥盆纪含磷地层(磷矿)及表壳岩石风化后通过成都盆地平原区三大流域———沱江、岷江、蒲江水系影响整个平原区冲洪积沉积物(后改造为水稻土)的自然源;②人类工农业活动通过各种方式进一步叠加的人为源。This study investigates distribution of concentration of phosphorus in surface soils in Uhengdu basin,Sichuan Province. The study area is divided into three parts： Longmenshan mountain area, hill area and plain area. Abnormal enrichment of phosphorus in mainly found to he distributed in the plain area by the factor score isopleth maps,characterized by high density of population and long history of industrial and agricultural activities. 16 elements with close relation in surface soils are examined by factor analysis. The results is： ①the natural source of phosphor in study area is stratums containing phosphorous （the deposits of phosphorus）,such as Sinian,Cambrian and Devonian in Longmenshan mountain , all the paddy soils in plain area are influenced by erosion process by three big rivers-Tuojiang River,Minjiang River and Pujiang River; ②another source is the activities of industry and agriculture, which overlaps on natural soils through anthropogenic activities.

关 键 词：成都盆地 浅层土壤 磷 来源 

分 类 号：X131.3[环境科学与工程—环境科学]