地幔存储了地球上绝大部分的碳,其中的CO_2可能对岩浆的最初形成起到关键作用。碱性玄武岩是富碱、贫硅的一类火山岩,也是地球上主要的板内火山岩类型,但其成因长期以来存在争议。由于火成碳酸岩常与碱性火山岩相伴生,碱性玄武岩中也常常含有富CO_2的包裹体,这些都显示CO_2可能对碱性玄武岩熔 The mantle stores most of the earth’s carbon, and CO 2 can play a key role in the initial formation of the magma. Alkaline basalts are a class of alkali-rich, silicon-depleted volcanic rocks, and are the main intraplate volcanic types on Earth, but their causes have long been controversial. Since igneous carbonates are often associated with alkaline volcanic rocks, alkaline basalts often contain CO 2 -rich inclusions, all of which indicate that CO 2 may have an impact on alkaline basalt melting