Ore potential of volatile-bearing magmas: Experimental investigation on the partitioning of metals between magmatic melts, minerals and fluids

岩浆作用在几种类型矿床的形成中起着基础性的作用，例如，它们与由Au、铂族元素(PGE)、铜、镍、钼等金属组成的巨型或世界级矿床的成因有关，这些金属对全球工业和经济具有极其重要的价值。为了估计单个岩浆系统作为金属来源的相关性或成矿潜力，需要对导致天然含挥发分岩浆中主要矿化过程最优化的情况有一个一般的了解。这一建议探索了岩浆和岩浆流体输送和浓缩贵金属和贱金属的潜力，这直接影响了我们对斑岩型铜-金-钼矿床和铜-镍-铂族元素+金硫化物矿床的形成的理解，这两种矿床是世界上两种主要的高温金属矿床类型。将利用高压实验模拟和高分辨率地球化学分析相结合的创新方法获得新的信息，以确定在与地球上地壳下部相对应的P-T-fO2条件下金属(Au、PGe、Cu、Ni、Mo)在岩浆相(熔体、矿物和流体)之间的分配。

Magmatic processes play a fundamental role in the formation of several types of ore deposits, for instance, they are associated with the origin of giant or world-class deposits of ores composed of metals such as Au, Platinum Group Elements (PGE), Cu, Ni, Mo (among many others) that are extremely valuable for global industry and economy. In order to estimate the relevance or ore potential of an individual magmatic system as a source of metals, a general understanding of circumstances leading to an optimization of main oremineralization processes in natural volatile-bearing magmas is required. This proposal explores the potential of magmas and magmatic fluids to transport and concentrate noble and base metals with direct implications on our understanding of the formation of porphyry Cu-Au-Mo ore deposits and Cu-Ni-PGE+Au sulfide deposits, that are two main hightemperature metal deposit types worldwide. The new information will be gained using innovative approaches combining high pressure experimental simulations and high resolution geochemical analyses to determine of the partitioning of metals (Au, PGE, Cu, Ni, Mo) between magmatic phases (melts, minerals and fluids) under P-T-fO2 conditions corresponding to the Earth’s lower to upper crust.