Identifying controls on the thickness and geometallurgy of the Flatreef PGE deposit, Turfspruit farm, Northern Limb of the Bushveld Complex....

识别南非布什维尔德杂岩北端Turfspruit农场平礁PGE矿床的厚度和几何控制。南非北布什维尔德杂岩拥有世界上最大的铂族元素(PCE)矿藏--Platreef。近年来，考虑到它们在绿色能源生产中的作用，PGE已成为向净零过渡的关键。最近发现的Platreef向下延伸的Platreef PGe-Ni-Cu矿床已知具有高品位矿化，其资源潜力可满足全球约10年的铂供应。在地层学上，平礁的厚度非常不均匀，它与镍、铜和PGES等级之间的关系尚不清楚。正岩浆成矿作用不能完全解释矿化的分布，也不能完全解释矿化与厚度的关系。白云石和页岩在成矿过程中的同化作用可能重新激活了矿化作用，然而，这些影响尚未完全被了解。该项目将通过沿走向和不同围岩同化区测井钻芯来调查平礁对矿化的潜在控制。TIMA自动矿物学测绘将用于研究这些不同区域的几何矿物学。硅酸盐微量元素地球化学的飞行时间LA-ICPMS分析，以及硅酸盐和碳酸盐相的稳定同位素(18O和13C)分析将评估同化的程度，从而跟踪同化对系统的影响，并了解每个下盘岩性的隐蔽同化。

Identifying controls on the thickness and geometallurgy of the Flatreef PGE deposit, Turfspruit farm, Northern Limb of the Bushveld Complex, South Africa.The Northern Bushveld Complex, South Africa, hosts the world's largest deposit of platinumgroup elements (PGEs), the Platreef. In recent years, given their role in green energy production, PGEs have become essential for the transition to net-zero. The recently discovered down-dip extension of the Platreef, the Flatreef PGE-Ni-Cu deposit, has known to have highgrade mineralisation and a resource potential of ~10 years of global supply of Pt. Stratigraphically, the Flatreef has a very heterogenous thickness, and its relationship between Ni, Cu, and PGEs grades is unclear. Orthomagmatic ore-forming processes cannot fully explain the distribution of the mineralisation, nor its relationship to the thickness. Assimilation of dolomites and shales during ore formation may have remobilised mineralisation, however, these effects are not fully understood. This project will investigate potential controls on mineralisation in the Flatreef by logging drill core along strike and in different country-rock assimilation zones. TIMA automated mineralogical mapping will be used to investigate the geometallurgy in these different zones. TOF LA-ICP-MS analyses of silicate trace element geochemistry, and stable isotope ( 18O and 13C) analyses of silicate and carbonate phases will assess the extent of assimilation, allowing to track the effect of the assimilation on the system, and understand the cryptic assimilation of each footwall lithology.