New data on the multiple sulfur isotope signature of Archean sulfides from country rocks and magmatic mineralization at the Moran deposit (Kambalda, Western Australia) were combined with previously published geochemical data to constrain the various stages of the dynamic evolution of this magmatic system, unveiling new insights into the transport mechanisms of sulfide liquids in komatiite magmas. Sulfides in the Archean magmatic and sedimentary host rocks of the komatiites display a unique mass-independent sulfur isotope signature (Δ³³S), which records a photochemical reaction of sulfur in an oxygen-poor atmosphere prior to the Great Oxidation Event.

Sedimentary rocks that are thought to be assimilated by komatiite show a distinctly positive Δ³³S signature (+ 0.9 to + 2.4‰). Early ore sulfides situated above these sedimentary rocks contain relatively few valuable metals and display an overlapping Δ³³S range (+ 0.6 to + 1.0‰). Subsequent but still early ore sulfides are situated above basalt, as the sedimentary rocks were thermo-mechanically eroded by the sulfide melt, displaying more mantle-like signatures (+ 0.2 to + 0.3‰) and valuable metal content - indistinguishable from the main ore deposit. This reflects a progressive dilution of the contaminant signature by the magmatic isotope signature of the komatiite liquid. Calculated volumes of the interaction of silicate melt and sulfide melt to explain the metal tenor of the ore and its Δ³³S signature indicate a decoupling between chemical and isotopic signatures. This can be explained by upgrading the sulfide melt with valuable metals simultaneously with the dissolution of sulfur in the komatiite melt.

来自莫兰矿床（西澳大利亚坎巴尔达）围岩和岩浆矿化的太古代硫化物的多种硫同位素特征的新数据与先前发布的地球化学数据相结合，以限制该岩浆系统动态演化的各个阶段，揭示了新的深入了解科马提岩浆中硫化物液体的传输机制。太古代岩浆和科马提岩沉积母岩中的硫化物显示出独特的与质量无关的硫同位素特征（Δ ³³ S），它记录了大氧化事件之前硫在贫氧大气中的光化学反应。

被认为被科马提岩同化的沉积岩表现出明显的正 Δ ³³ S 特征（+ 0.9 至 + 2.4‰）。位于这些沉积岩上方的早期矿石硫化物含有相对较少的有价值金属，并显示出重叠的 Δ ³³ S 范围（+ 0.6 至 + 1.0 ‰）。随后但仍是早期的矿石硫化物位于玄武岩上方，因为沉积岩受到硫化物熔体的热机械侵蚀，显示出更多类似地幔的特征（+ 0.2 至 + 0.3‰）和有价值的金属含量 - 与主要矿床无法区分。这反映了科马提岩液体的岩浆同位素特征对污染物特征的逐渐稀释。计算硅酸盐熔体和硫化物熔体相互作用的体积，以解释矿石的金属品位及其 Δ ³³ S 特征，表明化学特征和同位素特征之间的脱钩。这可以通过用有价值的金属提质硫化物熔体并同时将硫溶解在科马提矿熔体中来解释。