The Gondpipri layered mafic–ultramafic intrusion at the western margin of the Bastar Craton in Central Indiacomprises leucogabbro, gabbronorite, and websterite. The intrusion hosts both magmatic and hydrothermal Ni-platinum group element (PGE)mineralisation. In this study, we use in-situ measured trace element composition of pyrite and magnetite and zircon U–Pb geochronology to elucidate hydrothermal processes and their timing. Secondary platinum group minerals (PGMs) occur as veins and fracture fillings in sulfide and oxide minerals together with hydrothermal zircon clusters within chlorite alteration. Electron microprobe (EPMA) analysis reveals that magmatic PGMs are enriched in Pt, Pd, and Rh, whereas the hydrothermal PGMs are characterized by higher Fe, S, Te, Bi, and Ni. A semi-metal collector model (Bi-Te) is proposed for PGE in the Heti Ni-PGE prospect, where an immiscible Bi-Te melt exsolves and acts as a collector for formation of primary PGM following precipitation of Pd tellurides, tsumoite, melonite and hessite upon cooling of temperature hydrothermal fluids. Two generations of pyrite (Py-I and Py-II) and magnetite (Mag-I and Mag-II) are identified. Py-I and Py-II exhibit distinctive concentrations of Co, Se, and Au, while Mag-I and Mag-II have variable concentrations of REEs, Cr, Ti, Ga, V, Ba, and Sr. Selenium geothermometry of pyrite indicates that hydrothermal mineralisation occurred within a temperature range of 200 °C to 475 °C. The Ni-PGM-Bi-Te mineralisation is associated with an unusual cluster of megacrystic zircons, which are likely hydrothermal origin. Uranium-lead (U–Pb) dating of five zircons using LA-ICPMS yields a concordia age of 2524 ± 7 Ma, interpreted as the age of the hydrothermal sulfide-hosted Ni-Te-Bi-PGE mineralization.

位于印度中部 Bastar Craton 西缘的 Gondpipri 层状镁铁质-超镁铁质侵入体包括 leucogabbro、辉长岩和腹板岩。该侵入体拥有岩浆和热液镍铂族元素 （PGE） 矿化。在这项研究中，我们使用原位测量的黄铁矿和磁铁矿的微量元素组成以及锆石 U-Pb 地质年代学来阐明热液过程及其时间。次级铂族矿物 （PGM） 以硫化物和氧化物矿物中的矿脉和裂缝填充物以及绿泥石蚀变中的热液锆石簇的形式出现。电子探针 （EPMA） 分析显示，岩浆 PGM 富含 Pt、Pd 和 Rh，而热液 PGM 的特征是更高的 Fe、S、Te、Bi 和 Ni。在 Heti Ni-PGE 勘探区中为 PGE 提出了一种半金属捕收剂模型 （Bi-Te），其中不混溶的 Bi-Te 熔体溶解并充当捕收剂，在温度热液流体冷却后，碲化钯、镁铁矿、黑铁矿和黑铁矿沉淀后形成原生 PGM。鉴定出两代黄铁矿（Py-I 和 Py-II）和磁铁矿（Mag-I 和 Mag-II）。Py-I 和 Py-II 表现出不同浓度的 Co、Se 和 Au，而 Mag-I 和 Mag-II 具有不同浓度的稀土元素、Cr、Ti、Ga、V、Ba和Sr。黄铁矿的硒地温法表明，热液矿化发生在 200 °C 至 475 °C 的温度范围内。 Ni-PGM-Bi-Te 矿化与一组不寻常的巨晶锆石有关，这可能是热液成因。使用 LA-ICPMS 对五个锆石进行铀铅 （U-Pb） 测年得出的协和年龄为 2524 ± 7 马，解释为热液硫化物承载的 Ni-Te-Bi-PGE 矿化的年龄。