摘要
贵州地区广泛分布的碳酸盐岩风化壳的直接测年一直未解决。本工作在前期研究基础上,利用裂变径迹法详细地对3个风化壳剖面中的次生石英颗粒进行年代学研究,以初步界定风化壳的形成时代。测试结果表明,新蒲风化壳剖面大约开始形成于距今8.5 Ma;官坝风化壳剖面大约开始形成于距今7.3 Ma;大兴风化壳剖面大约开始形成于距今4.6 Ma。
The problem of directed dating of carbonate weathering crust in Guizhou Province hasn＇t been resolved. On the base of our previous study, we tested in detail the ages of antigenic quartz grains by fission track dating method and give a limitation of the forming date to carbonate weathering crust. The results show that the age of Xinpu profile is younger than 8.5 Ma, and the age of Guanba profile is younger than 7.3 Ma, and the age of Daxing profile is younger than 4.6 Ma.
出处
《原子能科学技术》
EI
CAS
CSCD
北大核心
2008年第6期568-569,共2页
Atomic Energy Science and Technology
基金
国家重点基础研究发展计划资助项目(2006CB403200)
国家自然科学基金资助项目(40371012)
关键词
裂变径迹
石英
风化壳
碳酸盐岩
贵州
fission track
quartz
weathering crust
carbonate rock
Guizhou Province
