The Geochemistry of the Platinum Group Elements, Copper, Rhenium and Gold in Granitic Rocks

世界上许多最大的铜矿和金矿床的成矿流体来自结晶的花岗岩浆。这些元素与铂族元素一起，被不混溶的硫化物熔体隔离，当它们从岩浆中沉淀出来时，控制着这些元素随后的演化。这项拟议的研究利用铂对硫化物的显著亲和力来识别硫化物饱和的开始，然后监测其对随后演化的岩浆中铜和金的演化的影响。这有望对花岗岩熔体结晶过程中铜和金的化学提供新的认识，并解释为什么有些花岗岩系统含矿，而另一些则不含矿。

Many of the World's largest copper and gold deposits derive their ore fluids from crystallizing granitic magmas. These elements, together with the platinum group elements, are sequestered by immiscible sulfide melts, which when they precipitate from a magma, control the subsequent evolution of these elements. The proposed study takes advantage of platinum's remarkable affinity for sulfides to identify onset of sulfide saturation and then monitor its effect on the subsequent evolution of copper and gold in the evolving magma. It is expected to provide new insights into chemistry of copper and gold in crystallizing granitic melts and explain why some granitic systems are ore bearing and other are not.