The Flatreef of the northern limb of the Bushveld Complex is a world-class platinum-group element (PGE) deposit representing the down-dip extension of the Platreef. Exploration drilling in the central portion of the project area intersected a particularly thick PGE-mineralised portion of the Flatreef exposed in drill core TMT006 and its two deflections, containing 4.5 ppm PGE (Pt + Pd + Rh + Au) over 90 m and ~ 3.7 ppm PGE over 150 m. Data obtained using whole rock geochemical analysis, field emission scanning electron microscopy, micro X-ray fluorescence and X-ray computed tomography indicate that the PGE are hosted by, or are spatially closely associated with, disseminated sulfides that occur interstitial to the cumulus silicate minerals. PGE grades show a broad, albeit irregular trend of progressive downward decrease, whereas most metal ratios (Cu/Ni, Pt/Rh, Cu/Pd and, to a lesser degree, Pt/Pd) remain broadly constant throughout the 90 m main ore zone. These features are interpreted to reflect two stages of ore formation: (i) hydrodynamic concentration of sulfidic ultramafic crystal mushes and (ii) localised downward percolation of sulfide melt in response to fluidisation of the cumulate mush caused by infiltration of ascending magmatic or crustal fluids. The model is consistent with the close spatial association of the sulfides with interstitial plagioclase as well as accessory phlogopite, quartz, apatite and rutile, whereas cumulus orthopyroxene is largely free of sulfide.

Bushveld Complex 北翼的 Flatreef 是世界级的铂族元素 (PGE) 矿床，代表着 Platreef 的向下延伸。在项目区中部进行的勘探钻探与 Flatreef 的一个特别厚的 PGE 矿化部分相交，该部分暴露在钻芯 TMT006 及其两个偏斜处，在 90 米以上和 ~ 3.7超过 150 m 的 ppm PGE。使用全岩地球化学分析、场发射扫描电子显微镜、显微 X 射线荧光和 X 射线计算机断层扫描获得的数据表明，PGE 由散布在硅酸盐矿物间质中的硫化物所承载或在空间上密切相关. PGE 等级显示出广泛但不规则的逐渐下降趋势，而大多数金属比率（Cu/Ni、Pt/Rh、Cu/Pd 以及较小程度上的 Pt/Pd）在整个 90 米的主要矿区中保持大致恒定。这些特征被解释为反映了矿石形成的两个阶段：（i）硫化物超镁铁质晶体糊状物的流体动力学浓缩和（ii）硫化物熔体的局部向下渗滤，以响应上升岩浆或地壳流体渗透引起的堆积糊状物的流化。该模型与硫化物与间隙斜长石以及附属金云母、石英、磷灰石和金红石的紧密空间关联一致，而积云斜辉石主要不含硫化物。(i) 硫化物超镁铁质晶体糊状物的流体动力学浓度和 (ii) 硫化物熔体的局部向下渗滤，以响应由上升的岩浆或地壳流体渗透引起的累积糊状物的流化。该模型与硫化物与间隙斜长石以及附属金云母、石英、磷灰石和金红石的紧密空间关联一致，而积云斜辉石主要不含硫化物。(i) 硫化物超镁铁质晶体糊状物的流体动力学浓度和 (ii) 硫化物熔体的局部向下渗滤，以响应由上升的岩浆或地壳流体渗透引起的累积糊状物的流化。该模型与硫化物与间隙斜长石以及附属金云母、石英、磷灰石和金红石的紧密空间关联一致，而积云斜辉石主要不含硫化物。