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氦元素具有惰性和很高的扩散系数,同时,是一种在水中溶解度低,不易被吸附的稳定元素,其基本来源是~(233)U,~(232)Th的放射性衰变产物。因此,近些年来氦被认为是探测深部铀矿体的一种可能的指示元素。氦元素在地下的垂直分布是随深度递增的,而在水平方向上的分布是地质,矿产诸因素的函数。地下氦源通过扩散和液相渗滤来不断向地表迁移。岩石裂隙对扩散有着更重要的意义。由于近地表的土壤疏松,故其中的氦气多与大气中的氦造成平衡,因此壤中氦气测量在
The helium element has inert and high diffusion coefficient. At the same time, it is a stable element which has low solubility in water and is not easily adsorbed. Its basic source is the radioactive decay product of ~ (233) U and ~ (232) Th. Therefore, helium has been considered as a possible indicator of exploration of deep uranium ore bodies in recent years. The vertical distribution of helium in the ground is increasing with depth, while the distribution in the horizontal direction is a function of geological and mineral factors. Underground helium sources continue to migrate to the surface by diffusion and liquid-percolation. Rock fissures have more significance for diffusion. Because the near surface of the soil loose, so most of the helium in the atmosphere and the balance of helium, so the helium in the soil measured in