Formation and storage of diamond in Earth's mantle

我们想了解钻石在地幔中的起源和生存。我们的目标不仅是确定钻石最初生长的高温高压流体的成分，而且还要确定任何破坏地下深处钻石的流体的成分。包裹体是微小的晶体和液滴，数十亿年前被困在不断生长的钻石中。因此，它们是微小的时间胶囊，可以揭示地球地幔中含金刚石岩石的起源和演化。在大多数钻石形成的亿万年后，火山将钻石连同最初包围钻石的地幔岩石样本一起带到地表。这些样品（称为捕虏体）可以提供有关喷发时金刚石源岩状态的信息。结合金刚石包裹体和捕虏体的数据将使我们能够重建古大陆及其深部地幔根随时间的复杂演化。

We want to understand both the origin and the survival of diamonds in the Earth's mantle. We aim to establish the composition not only of the hot, high-pressure fluids from which the diamonds originally grew but also of any fluids that destroy diamonds deep underground. Inclusions are tiny crystals and fluid droplets that became trapped in the growing diamonds billions of years ago. Thus, they are miniscule time capsules that can reveal the origin and evolution of diamond-bearing rocks in the Earth's mantle. Eons after most diamonds had formed, volcanoes then carried diamonds to the surface together with samples of the deep mantle rock that originally surrounded the diamonds. These samples (known as xenoliths) can provide information on the state of the diamond source rocks at the time of eruption. Combining data from diamond inclusions and xenoliths will allow us to reconstruct the complex evolution of ancient continents and their deep mantle roots through time.