成都盆地浅层土壤中F来源分析  

Analysis of sources of fluorine in surface soils of the Chengdu basin,Sichuan,China

作　　者：陈代庚[1] 任利民[1] 陈德友[2] 唐文春[2] 秦兵[2] 周雪梅[2] 马振东[1] 胡以铿[1] 

机构地区：[1]中国地质大学,湖北武汉430074 [2]四川省地质调查院,四川成都610081

出　　处：《地质通报》2005年第8期755-760,共6页Geological Bulletin of China

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

摘　　要：对成都盆地3061个浅层土壤样品以元素为变量进行F回归分析,在回归模型的基础上进行因子分析,并选取因子载荷较大的元素作为特征元素组合。在结合元素地球化学性质、区域地质背景和因子得分等值线图的基础上,根据特征元素组合来研究F的来源。研究结果表明:①成都盆地浅层土壤中F的来源有6种,其中岷江流经地区出露的酸性岩浆岩、碱性岩和龙门山前陆盆地上三叠统、侏罗系、白垩系沉积岩系是成都盆地浅层土壤中F的主要来源;②F在表生作用过程中显著地发生了迁移,岷江冲积扇成为其富集的“储库”;③自然作用对成都盆地浅层土壤中F的分布特征有显著的影响。Factor analysis was performed on 3061 samples of surface soils from the Chengdu basin after a regression analysis,in which fluorine was used as the dependent value while other elements were used as independent values. Elements with higher factor loading were selected to form characteristic groups. On the basis of taking account of the geochemical properties of elements, regional geological setting and factor score isopleth map, the sources of fluorine were studied on the basis of the characteristic element groups. Results of the study indicate that： ①fluorine in surface soils of the Chengdu basin has approximately six sources, of which acid magmatic and alkaline rocks in areas where the Minjiang River flows and Upper Triassic,Jurassic and Cretaceous sedimentary rocks in the foreland basin of the Longmen Mountains are the main sources of fluorine in surface soils of the Chengdu basin; ②fluorine has notably migrated in the supergene process, during which the Minjiang River alluvial fan is the “storehouse” of fluorine; and ③natural processes have significant influence on the distribution characteristics of fluorine in surface soils of the Chengdu basin.

关 键 词：成都盆地 F 因子分析 来源 

分 类 号：S151.93[农业科学—土壤学] P595[农业科学—农业基础科学]