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在压力下对酸盐融中的溶性进行控制

M Ali Bouhifd¹, Andrew P Jephcoat

¹University of Oxford, Department of Earth Sciences, Parks Road, Oxford OX1 3PR, UK. alib@earth.ox.ac.uk

|February 24, 2006

概括

显著影响了地球深层融化的溶性,影响了早期岩海洋中的贵重气体封存. 这挑战了关于早期地球的先前假设.

科学领域:

地质化学地质化学
矿物物理矿物物理
行星科学行星科学

背景情况:

像这样的小元素会影响主要地幔阶段 (例如矿).
酸盐液体可能在地球早期运输了挥发性物质.
对高压溶解度的影响还没有得到充分的研究.

研究的目的:

在高压和高温下研究酸溶液中的溶性.
确定在地球深层条件下的贵重气体行为中的作用.

主要方法:

激光加热的钻石杆细胞实验.
模拟了高达25 GPa和3000 K. 的酸融化成分.

主要成果:

融中的含量达到17 GPa的峰值,持续到500公里的深度.
溶解度超过了对无化的预测.
溶解度的急剧下降与预测的融化结构空白损失相关.

结论:

可以提高深层地幔化的气溶解度.
在地球早期的岩海洋中,贵重气体的封存是复杂的.
浅部分融化可能不是早期贵重气体大气丰富的唯一机制.

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