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发现于太古代沉积岩中的冥古代(>40亿年)碎屑锆石是了解地球最早期历史的直接样品。锆石的Ti温度计计算显示冥古代碎屑锆石的形成温度可达700℃,另外,锆石中的包裹体存在长英质的矿物。因此,学界多认为这些锆石结晶自地壳深熔而成的花岗质熔体。其他一些地球化学研究(如Li含量和同位素组成)也支持这个看法。由此可推断,地球最早期的板块构造型式与现今相似。但是,也有部
The Ming Paleolithic (> 4 billion-year) detrital zircon found in Archean sediments is a direct sample of the earliest earth’s history. The calculation of zircon Ti thermometer shows that the formation temperature of ancient Ming detrital zircon is up to 700 ℃. In addition, there are felsic minerals in the inclusions of zircon. Therefore, many scholars believe that these zircon crystals from the crust deep melting of granitic melt. Other geochemical studies (such as Li content and isotopic composition) also support this view. It can be inferred that the earliest plate tectonics in the earth is similar to today. However, there are also ministries