高寒湖沼区土壤中成矿元素迁移的分形伸展机制

土壤中元素迁移是一种开放体系、远离平衡、多种作用耦合的复杂过程,文章用分形方法研究了元素迁移的复杂性特征.选择高寒湖沼景观3个微景观作为试验区,分别是山间沼泽、山地沼泽、湖泊沼泽,系统采集了土壤剖面样品和土壤粒级大样,分析了元素全量和相态.研究了土壤中元素全量和相态分布特征;用元素含量-频数分形方法计算了土壤层元素全量的分维,也计算了土壤粒级元素的相态分维;研究了元素迁移过程元素含量和分维的演化特征.研究表明,高寒湖沼景观土壤中元素地球化学迁移机理是机械分散和化学溶蚀作用,迁移机制具有分形伸展规律.

FRACTAL STRETCHING MECHANICS OF ELEMENTS IN SOILS IN THE HIGH-COLD LAKE MARSH AREA

Element migration in soils is a complicated system which is irreversible - process, open - system and geochemical - coupling. The purpose of research is to open out complexity of dement migration in soils. The studied area is located in high - cold lake marsh region of Qinghai province, including intermountain, mountain and lacustrine marshes. Soil horizon samples and grain - size samples in the three studied area were collected. Element concentration and chemical facies concentration were analyzed in the laboratory. From rock to topsoil there is a clear lowered tendency of dement concentration. On the contrary, there is an elevatory tendency of dement fractal calculated by concentration - frequence method. Facies fractal of dement showed a complicated structure character in soils. The mechanical dispersion and chemical facies transition of dements and mechanics of fractal stretching in weathering process in high - cold lake marsh area have been achieved.