Experimental and isotopic investigations of volatile element loss during magma degassing (B07)

许多行星物体，包括地球、月球和一些分化的小行星，其特征是中等挥发性元素的强烈消耗。然而，这些消耗的起源，以及它们是否反映了太阳星云内或行星吸积和分化期间的过程，都是未知的。 该项目将通过在受控脱气实验中确定Cr、Cu、Zn和Ge的元素损失和同位素分馏，并将这些结果与观察到的天然样品的特征进行比较，调查在一些差异化陨石中观察到的极端挥发性贫化的起源。结合起来，这些结果将允许量化脱气的重要性，观察到的挥发性消耗。

Many planetary objects, including the Earth, Moon, and some differentiated asteroids are characterized by a strong depletion in moderately volatile elements. However, the origin of these depletions, and whether they reflect processes within the solar nebula or during planetary accretion and differentiation, is unknown. This project will investigate the origin of the extreme volatile depletions observed in some differentiated meteorites by determining the elemental loss and isotopic fractionation of Cr, Cu, Zn, and Ge in controlled degassing experiments, and by comparing these results to the signatures observed for natural samples. Combined, these results will allow quantifying the importance of degassing for the observed volatile depletions.