CSEDI Collaborative Research: Origin of Inclusions in Diamonds from the Deep Mantle

最近对一些钻石包裹体深层起源的鉴定，为通过直接观察这些样品来限制深部地幔的矿物和化学成分开辟了一条道路。PIs建议在过渡带和下地幔的P-T条件下，通过实验匹配所选包裹体的主微量元素化学来确定其来源。他们希望确定原始的组合，从而限制源区域的化学性质。此外，他们将开发一种快速的原位x射线技术，用于识别来自深部地幔的钻石内含物，从而为未来的起源研究获得新的样品。提出的研究可能会大大增加我们对深部地幔组成及其结构的理解。＊＊＊

9709712 Drake Recent identification of the deep origin of some inclusions from diamonds opens a way to constrain the mineral and chemical composition of the deep mantle through direct observation of these samples. The PIs propose to determine the origin of selected inclusions by matching their major and trace element chemistry in experiments under the P-T conditions of the transition zone and lower mantle. They hope to identify the original assemblages and thus place constraints on the chemistry of the source region. In addition, they will develop a rapid in- situ X-ray technique for identifying inclusions in diamonds from the deep mantle and thus obtain new samples for the future studies of their origin. The proposed research is likely to increase substantially our understanding of the composition of the deep mantle and its structure. ***