摘要
天水、秦安新近系红土、湖相沉积物的碳酸钙含量均随岩性变化而变化,红色层的CaCO3平均含量维持在6%～7%之间,钙质层的CaCO3平均含量多在20%～40%之间,高值可达60%以上。对比分析表明,黄土的碳酸钙含量高值仅在20%左右,两者相差悬殊。因此,红土与黄土应是不同气候环境下的产物。在此基础上,作者结合周围地区红土的部分沉积学证据对中国北方新近系红土的风成成因提出质疑并明确今后可能的解决途径。
The calcium carbonate contents of the Qinan Neogen Red-earth and Tianshui lacustrine sedimentary vary with the lithology.The average CaCO3 contents of the red beds maintains in 6% - 7%,and the average CaCO3 contents of the calcareous beds maintains in 20%-40%,the higher contents can amount to 60%.Comparative analysis is indicated that the highest value of the Loess calcium carbonate contents is only about 20%.Obviously,there is a tremendous difference between them. So, the Red-earth and Loess are the different sediments under different climate environment. Based on above study, the author oppugns the eolian origin of the Neogen Red-earth and brings forward solving methods for the future.
出处
《湖南理工学院学报（自然科学版）》
CAS
2007年第2期65-68,共4页
Journal of Hunan Institute of Science and Technology(Natural Sciences)
基金
国家重点基础研究发展规划项目(G1998040815)
国家自然科学基金资助项目(40241005和40201007)
关键词
新近系
红土
碳酸钙
neogene
red-earth
calcium carbonate
