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第二章金屬元素在土壤中的分佈一、元素在地壳中的分佈 从表1中可看出主要元素如铬、銅、鎳、鋅、錫、鉛、鉬、鎢等的克拉克值,都在10~(-2)到10~(-4)之間。这就指出我們所用的分析方法灵敏度一般要达到10~(-4)。在野外得到的分散晕,含量若达到表1所列的最低标准品位时,就应加以注意。但是我們所分析的样品是距矿体有一定距离的土样或岩样,因此,它的含量只要接近于最低标准品位就值得注意。也可以說,就有可能变为与矿体有关系的含量值。濃集系数K的变化
Chapter II Distribution of metal elements in the soil First, the distribution of elements in the crust Table 1 can be seen from the main elements such as chromium, copper, nickel, zinc, tin, lead, molybdenum, tungsten and other Clarke values are 10 ~ (-2) to 10 ~ (-4) between. This indicates that the sensitivity of the analytical method we used to reach 10 ~ (-4). Dispersal halo obtained in the wild, if the content reaches the minimum standard grade listed in Table 1, it should be noted. However, the sample we are analyzing is a sample of soil or rock that is some distance away from the orebody, so its content is noteworthy as close to the lowest standard grade. It can also be said that it is possible to become the value associated with the ore body. Concentration coefficient K changes