一、概述 (一)地壳中硅的丰度硅是地壳中分布最广的元素之一,它在地壳上的分布量仅次于氧,占地壳质量的25.74％。硅在地壳中的含量随着深度而减少。玄武岩圈中的基性岩是含硅不很丰富的,仅含22％到23％的硅。位于地壳下方的地核,其含硅量还要小,因为,地核是由铁、镍形成的。因此, First, an overview (A) the abundance of silicon in the crust Silicon is one of the most widely distributed elements in the crust, its distribution in the crust is second only to oxygen, accounting for 25.74% of the quality of the crust. The amount of silicon in the earth’s crust decreases with depth. The basalts in the basalt ring are not very rich in silicon and contain only 22% to 23% silicon. The underground core below the earth’s crust contains less silicon because the core is made of iron and nickel. therefore,