期刊论文

Feng, Z.-G.

中文

矿物岩石

1001-6872

2009

29

1

80-85

10.19719/j.cnki.1001-6872.2009.01.013

国家重点基础研究发展计划项目（2006CB403200） 中国科学院地球化学研究所环境地球化学国家重点实验室开放基金项目（SK-LEGS076） 湖南省自然科学联合基金项目（06JJ50074）

本校为第一且通讯机构

对湘西岩溶区呈镶嵌景观展布的4条风化剖面中石英粒度分布特征的进行对比研究,发现区域上碳酸盐岩风化成土作用具有极大可能性.基岩为灰岩的两条风化剖面(WC1和WC2)的频率分布曲线呈单峰窄峰态,众数值分别为4.9(φ)和4(φ);两条碎屑岩风化剖面(WC3和DBK)的频率分布曲线呈单峰宽峰态,众数值分别约为5.1(φ)和6(φ).而且各剖面基岩与上覆风化壳的石英粒度频率分布曲线呈现良好的对应关系.石英粒度的标准差、偏度、尖度等参数也显示,各剖面样品基本上分布于不同的区域.研究结果还表明:(1)母岩风化过程中,石英粒度分布特征是完全可以继承的;(2)剖面WC1和WC2为碳酸盐岩风化壳.说明在湘西岩溶区,在有利...

Taking a karst region of western Hunan Province as research area, and selecting four weathering profiles (of which, two are underlain by limestones, and other two by clastic rocks) as research object, through contrasting and surveying of characteristics of grain size distribution of quartz, this paper makes effort to unveil the formation of weathering crusts in the area. In the weathering profiles of WC1 and WC2, the bedrocks are limestones, the grain size frequency distribution curves of quartz show single, narrow peak, and their modes are 4. 9p and A respectively. The weathering profiles of ...