摘要
从野外不同地质体上 ,观察到地壳中元素是以纳米微粒状态被上升气流迁移的。为了进一步研究 ,设计了模拟上升气流通过矿层、矿层加盖层及围岩的模型层。实验结果显示 ,在模型中上升气流迁移的粒子仍是纳米微粒 ,并且采样片上含量也是随时间积累而增加。当有水层和玻璃盖层时 ,部分元素仍能穿透盖层 ,部分元素迁移受阻挠。纯扩散实验说明纯扩散迁移也存在 ,不过迁移量很小。列出模型实验中用扫描探针显微术观察到的纳米微粒照片。
Based on the observation of the matter absorbed on the geogas collectors, elements in the crust can be transported to surface in the form of nano-scale particles by ascending gas flow. For further studies, a model experiment was designed in which the ascending gas flowed through ore stratum, ore stratum covered by overburden and country rock respectively. The matter transported by ascending gas flow under the experiment turned to be nano-scale particle and the matter on the collectors increased with the increasing time. Some elements could pass through the water layer and compact glass in the experiment. The result of the diffusion experiment demonstrates that the elements can be also transported by diffusion, but the amount is much less. The nano-scale particles photographs of the geogas matter under scanning electron microscopy are presented.
出处
《核技术》
CAS
CSCD
北大核心
2001年第6期449-455,共7页
Nuclear Techniques
基金
国家自然科学基金! (项目编号 496 732 0 2 )
地质矿产部科技司! (项目编号 95 0 5 2 0 1- 1)
