近日，中国科学院广州地球化学研究所杜治学团队报道了地球深地幔早期保留了大量的水。相关论文于2025年12月11日发表在《科学》杂志上。

地球上的水很可能是在早期获得的，当时的地球由于巨大撞击而广泛熔化。这些早期的水是如何在结晶地幔中保留和分布的，目前尚不清楚。

研究组通过系统的高压实验，研究了水在布里奇曼石（初次结晶的原生地幔矿物）和共存熔体之间的分配。该研究结果表明，温度升高会大大增强水在布里奇曼石中的分配。因此，相当数量的水可能在结晶后被保留在下地幔中。这种早期储存在地球内部的水的循环可能调节了地幔动力学，并影响了早期地球向宜居行星的转变。

附：英文原文

Title: Substantial water retained early in Earth’s deep mantle

Author: Wenhua Lu, Ya-Nan Yang, Tao Long, Haiyang Xian, Yuan Li, Zhixue Du

Issue&Volume: 2025-12-11

Abstract: Earth’s water was likely acquired early, when our planet was extensively molten because of large to giant impacts. How such early water was retained and distributed within a crystallizing mantle remains unclear. In this study, we investigated partitioning of water between bridgmanite, the first and primary mantle mineral to crystallize, and coexisting melt through systematic high-pressure experiments. Our results demonstrate that partitioning of water into bridgmanite is strongly enhanced by increasing temperature. Thus, appreciable amounts of water may have been retained in the lower mantle after its crystallization. Circulation of such early stored water in Earth’s interior could have modulated mantle dynamics and influenced the transition of early Earth to a habitable planet.

DOI: adx5883

Source: https://www.science.org/doi/10.1126/science.adx5883