安徽宁国地区岩-土系统元素迁移及其农业地质环境效应  

Movement of Elements in a Rock-Soil System and the Effects of a Geological Environment on Agriculture in the Ningguo Region, Anhui Province

作　　者：徐小磊[1] 戴圣潜[2] 刘家云[2] 陆晓三[2] 储东如[2] 路玉林[2] 周存亭[2] 

机构地区：[1]中国地质大学地球科学学院,湖北武汉430074 [2]安徽省地质调查院,安徽合肥230001

出　　处：《地球科学（中国地质大学学报）》2005年第2期168-176,244,共10页Earth Science-Journal of China University of Geosciences

基　　金：国家自然科学基金项目(No.40372079;No.40472151;No.90411005);中国地质调查局地质大调查项目(No.1212010310305);安徽省国土资源厅地质勘查专项项目(No.2002-7).

摘　　要：通过多条基岩-土壤剖面和区域性土壤地球化学样品的微量元素丰度测试,分析了宁国地区不同基岩类型地球化 学元素在岩石和土壤中分布的基本特点,表明同一地层的岩-土系统在不同地点有基本相同的元素迁移规律,导致土壤中 的微量元素分布特征受控于其下地质单位的空间分布,植物生长必需的微量营养元素Fe、Mn、Cu、Mo、Zn、B6种元素表现 出在南华纪-寒武纪地层中向土壤强烈富集的趋势.岩-土系统元素迁移特点对宁国市天目山区重要名优特产品-山核 桃的生长环境产生重要影响,该区主导性名特优产品———山核桃,应该选择南沱组、兰田组、杨柳岗组、华严寺组、西阳山组 等地层出露的地段种植才能产生好的经济效益.How the movement of elements in a rock-soil system affects agriculture in a given geological environment is an entirely new study subject in petrology and geochemistry. This paper generalizes the fundamental features of the geochemical distribution of elements in various soil and rock types in the Ningguo region, Anhui Province, by means of the measurement of trace element abundance in bedrock-soil sections. The results show the regular movement patterns of elements in a rock-soil system in this region. Six trace elements Fe, Mn, Cu, Mo, Zn and B, indispensable to plant growth, are abundant in soil. It shows that, in Nanhuan system-Cambrian system, Fe, Mn and Cu are abundant in soil. This clearly suggests that the movement of elements in a rock-soil system significantly affects the growth environment of well-known agricultural, and forest products in Tianmu Mountains of Ningguo region. Walnuts, the leading product in Tianmu Mountains, are suited to the soil in the area of the Nantuo, Lantian, Yangliugang, Huayansi and Xiyangshan formations.

关 键 词：岩-土系统 元素迁移 地球化学 地质环境 农业地质 

分 类 号：P59[天文地球—地球化学]