摘要
对重庆武隆岩溶区五个土壤剖面的粒度特征进行了分析,并将其粒度参数、粒度曲线、结构参数散点图等与各种沉积环境下的沉积物粒度特征进行对比,发现研究区样品的粒度特征与河流相沉积物、湖泊沉积物、坡积物等物质的粒度特征差异较大;与黄土高原红粘土、黄土古土壤、镇江下蜀土的粒度特征存在相似性,但仍有一定差异;与贵州碳酸盐岩上覆堆积物的粒度特征有较为一致的特性.根据五个土壤剖面的粒度特征推测,其沉积过程中溶蚀作用占主导,与先前风化形成该土层的原岩层性质有关,并有一定风成成因,同时还与坡面流水有一定关联.
The grain-size characteristics of the soil in 5 profiles in the karst area of Wulong,Chongqing were analyzed.Its grain size parameters,grain size curves and scatter plots of structure parameters were compared with the grain-size characteristics of the sediments formed in several kinds of depositional environments.The results showed that the samples of the study area were profoundly different from eolian sediments,lacustrine sediments and diluvium sediments in grain-size characteristics and were relatively consistent with the incompact sediment overlying the carbonate rock in Puding of Guizhou.Based on the grain-size characteristics on profiles SA,SB,SC,SD and SE,it is deduced that erosion played a leading role in the deposition process,which is related to the properties of the original weathering-formed carbonate rock in these karst area.
出处
《西南大学学报（自然科学版）》
CAS
CSCD
北大核心
2012年第2期114-121,共8页
Journal of Southwest University(Natural Science Edition)
基金
国家自然基金资助项目(40971122)
西南大学教师教育平台资助项目(2009-2120100312)
关键词
沉积物
粒度
岩溶
重庆
sediment
grain-size
karst
Chongqing
