摘要
提出了地壳中存在一种新的元素迁移现象 ,即由于地壳内存在的上升气流将非气态元素以纳米微粒形式垂直迁移至地表 ,迁移距离可达几百米 ,甚至几千米。通过室内模型实验证明 ,元素纳米微粒以上升气流垂向迁移形式为主 ,扩散迁移只占极小部分。列举了宣汉气田及成都平原隐伏断裂上汞污染的二个实例 ,初步讨论这种新的元素迁移现象对地表地球化学环境的影响。
This paper discusses a new form of elemental migration by ascending flows existing in the crust. The non-volatile elements can be transported vertically from the deep of hundreds to thousands miters to the surface in the form of nano-scale particles. The data of simulation tests demonstrate that the vertical transportation by ascending flows is the main case, and the diffusion transportation is a limited part in the form of the nano-scale particles. Based on the data of two examples, that is the gas anomaly in Xuanhan natural gas field and the Hg pollution on the earth surface above the concealed fault in Chengdu plateau, the influence of this new form of elemental migration on the geochemical environments is discussed.
出处
《成都理工学院学报》
CAS
CSCD
北大核心
2002年第5期567-570,共4页
Journal of Chengdu University of Technology
基金
国家自然科学基金资助项目 ( 4 96 732 0 2 )
