辽宁兴城地区绥中花岗岩--棕壤土矿质元素迁移特征  

Migration characteristics of mineral elements between Suizhong granites and brunisolic soils in Xingcheng area,Liaoning Province,China

作　　者：陶景梅[1] 王建国[2] 刘欣玥 韩亚杰[1] 刘志川 TAO Jing-mei;WANG Jian-guo;LIU Xin-yue;HAN Ya-jie;LIU Zhi-chuan(Museum of Jilin University,Changchun 130061,China;College of Earth Sciences,Jilin University,Changchun 130061,China)

机构地区：[1]吉林大学博物馆,长春130061 [2]吉林大学地球科学学院,长春130061

出　　处：《世界地质》2019年第3期636-642,共7页World Geology

基　　金：中国地质调查局“中美黑土地土地利用及其地质环境特征对比研究”项目(DD20160104)

摘　　要：辽宁兴城地区以绥中花岗岩为成土母质的酸性棕壤土是一种具有特色的农作土壤。对绥中花岗岩与土壤中矿质元素的迁移规律的研究表明,基岩、成土母质、底土层、心土层和耕作层中的矿物组合、矿物形态及地球化学具有相似性。酸性棕壤土的物质来源于基岩的残积或近地运积。土壤各发生层中的Si、Fe、K、Mn等常量元素具有显著高值,稀土元素富集。酸性棕壤土矿物分解处于钙淀积-酸性硅铝阶段。化学风化作用过程完成了初始的去Ca、Na过程,进入到去K的阶段,矿质元素迁移表现为母岩高物理风化程度和棕壤土对有效元素的高继承性的特征。Acid brunisolic soil,with Suizhong granite as its parent materials,is a special type of agricultural soil in Xingcheng area,Liaoning Province,China.Study on migration rules of mineral elements between Suizhong granites and the soil show that similarities in the mineral assemblages,mineral morphology and soil chemistry exist among bedrock,soil-forming parent material,subsoil layer,core soil layer and faming soil layer.The material of acidic brunisolic soil is derived from the residual of bedrock or short-distance transportation and accumulation.Each soil layer contains significant high values of Si,Fe,K,Mn,and is enriched in rare earth elements.This indicates that the decomposition of minerals in acidic brunisolic soil is at the stage of calcium deposition and acidic silica-aluminum.As for the chemical weathering process,the initial stage of de-Ca and de-Na had already completed,and the intermediate stage of de-K has entered.The migrations of mineral elements are characterized by high physical weathering of parent rocks and high inheritance of essential elements in brunisolic soil.

关 键 词：兴城地区 矿质元素 迁移 绥中花岗岩 棕壤土 

分 类 号：P588.121[天文地球—岩石学] S153[天文地球—地质学]