40K-(40)Ar constraints on recycling continental crust into the mantle
40K-(40)Ar constraints on recycling continental crust into the mantle
复制标题
40K-(40)Ar对大陆地壳再循环进入地幔的限制
DOI：
10.1126/science.288.5467.845
复制
发表时间：
2000
期刊：
影响因子：
56.9
通讯作者：
Gillet
中科院分区：
文献类型：
--
作者：
Coltice;Albarède;Gillet
在熔融过程中，钾被提取到岩浆中以及氩的脱气限制了地壳中钾相对于大气中氩的相对含量。在地球的历史上，不超过30%的现代大陆质量被俯冲回地幔。据估计，50%至70%的俯冲沉积物被重新纳入深陆壳。大陆地壳和上地幔之间有限的交换的结果是上地幔的化学是由与深部地幔的物质交换驱动的。
Extraction of potassium into magmas and outgassing of argon during melting constrain the relative amounts of potassium in the crust with respect to those of argon in the atmosphere. No more than 30% of the modern mass of the continents was subducted back into the mantle during Earth's history. It is estimated that 50 to 70% of the subducted sediments are reincorporated into the deep continental crust. A consequence of the limited exchange between the continental crust and the upper mantle is that the chemistry of the upper mantle is driven by exchange of material with the deep mantle.