辽宁地区古红土微量元素的地球化学特征研究  

Geochemistry Characteristics of Microelements in latosol-like Paleosols in Liaoning province

作　　者：王秋兵[1] 吴殿龙[1] 韩春兰[1] 陈辉[1] 郭月[1] 

机构地区：[1]沈阳农业大学地与环境学院,辽宁沈阳110161

出　　处：《土壤通报》2009年第4期789-794,共6页Chinese Journal of Soil Science

基　　金：教育部博士点基金(20040157007);国家自然科学基金(40671079)资助

摘　　要：对辽宁地区同种母质不同成土环境发育古红土剖面和不同母质发育古红土剖面中微量元素含量及Rb/Sr比值变化进行了研究,结果表明:成土母质是影响辽宁地区古红土微量元素含量及其地球化学行为的重要因素,不同母质发育的古红土微量元素含量存在较明显的差异,表现为:千枚岩>石灰岩>第四纪松散沉积物>片麻岩。辽宁地区第四纪古红土剖面中Rb/Sr比值明显高于洛川古土壤剖面,且Rb/Sr比值由剖面上部到下部有增大趋势。这表明辽宁地区第四纪古红土形成的古环境较湿润,随着时间的推移气候变得越来越干旱。Geochemistry characteristics of microelements and the ratio of Rb to Sr （Rb/Sr） in latosol-like paleosols which developed from four different parent materials in Liaoning province were analyzed in the paper. The results show that parent material is a primary factor affecting content of microelements and their geochemistry characteristics in latosol-like paleosols in Liaoning province. The content of microelements vary distinctly in latosol-like paleosols developed from different parent materials. The order from higher content to lower content of microelements is the latosol-like paleosols derived from Phyllite, limestone, Quaternary loose sediments and Gneiss. The results also indicate that Rb/Sr in latosol-like paleosols in Liaoning province is much higher than that in the paleosols in Luochuan area of Shaanxi province. Rb/Sr trends to increase from upper part to lower part of latosol-like paleosols profiles. These reflect that latosol-like paleosols in Liaoning province were developed in a paleo-climate of more humid and the weather are becoming dryer and dryer over time.

关 键 词：占红土 地球化学 微量元素 辽宁地区 

分 类 号：P595[天文地球—地球化学]