摘要
通过样品采集和室内分析,研究了成都平原区土壤中Cd高含量区的区域分布特征和形成原因。在绵远河、石亭江流域冲积物中存在Cd含量高值区。Cd高含量区域分布Ⅰ、Ⅱ级阶地-Ⅲ级-Ⅳ级或Ⅴ级阶地冲击物中Cd含量逐渐降低。发育与龙门山的河流(绵远河、石亭江)沉积物Cd含量显著高于其他水系沉积物。Cd高含量分布区与不同级次的阶地相吻合的特征表明其控制因素显著,属于地质作用的产物。这一结论与多数研究者认为的人为因素引起的具有根本区别。
This paper studied the distribution of high - Cd -content areas in the Chengdu plain and its genesis based on sample collection and labora-tory analysis. In the alluvium of the Mianyuan River and Shiting River basins, there are abundant element Cd. The contents of Cd distributed in the allu-vium gradually decline in the order from terrace 1 to terrace 5. And such contents in the alluvium of the two rivers （ Mianyuan River and Shiting River） flowing through the Longmengshan Mountains are remarkably higher than that of the other water systems. That high contents of Cd inosculated with the dif-ferent terraces indicates that it is the result from geological processes as an evident controlling factor. This conclusion is radically different from the most previous studies that attribute this phenomenon to artificial factors.
出处
《地质与勘探》
CAS
CSCD
北大核心
2013年第2期352-358,共7页
Geology and Exploration
基金
成都经济区生态地球化学调查(200214200027)资助
关键词
表层土壤
Cd空间分布
冲积扇
成都平原
surface soil, Cd, spatial distribution, alluvium, Chengdu plain
