“橄榄岩是主要成分”已成定论地球有地壳、地幔和地核三层构造,这是众所周知的。那么,“橄榄石”是何物呢?人们认为,大约地球的一半,即地壳和地幔,是由岩石组成的。而且,地幔是由被称为“橄榄岩”的岩石或以“橄榄岩”为原料的物质所组成,在目前已成“定论”。所谓橄榄石就是构成“橄榄岩”的最重要的矿物,即主要成分。因此,根据上述定论,可以说橄榄石就是地幔的主要成分。但是,笔者想在本文中对这一“定论”本身重新进行探讨。那么,“橄榄石”和“板 It is well known that the peridotite is a major component of the Earth’s three-layer crust, mantle and core structure. So, what is “olivine”? It is believed that about half of the Earth, the crust and the mantle, consists of rocks. Moreover, the mantle is composed of rock known as “peridotite” or “peridotite” as the raw material, which has now become a “final conclusion.” The so-called peridotite is the most important mineral that constitutes “peridotite”, ie the major component. Therefore, according to the above conclusion, it can be said that olivine is the main component of the mantle. However, I would like to re-examine this “conclusion” in this article. Well, “olivine” and "board