Spinifex-textured olivine plates hosted in sulfides are usually named “interspinifex ore” in komatiite-hosted sulfide deposits. This ore type is rare but provides important genetic information on sulfide deposits, komatiite volcanology and thermomechanical erosion processes. Occurrences in Victor South-McLeay and Moran South (Kambalda, Western Australia) differ significantly from previously reported occurrences in their stratigraphic location, position within the ore profile and textural appearance. Thus, their formation process has to be reconsidered. Interspinifex ore reported here is situated in the lower portion of the basal lava flow between massive and net-textured sulfides in the centre of the embayment and between massive sulfides and older basalt in a “pinchout” where the sulfides melted sideways into older basalt on the embayment edge. Interspinifex ore is composed of up to 10-cm-long aggregates of parallel plates in the upper portion of massive sulfides and is overlain by barren komatiite. The texture does not allow for a classic single explanation. Thus, two possible formation mechanisms are envisaged: (1) A younger komatiite melt intrudes into its own olivine and sulfide liquid cumulate pile, while the sulfides are still liquid. The injection on top of the sulfides causes the formation of an emulsion, from which the spinifex forms due to the temperature gradient between the melts. (2) Interspinifex ore is a relic of an early komatiite flow formed in a series of successive pulses of komatiite and sulfide liquid. The spinifex of the komatiite is invaded by a younger batch of sulfide liquid replacing interstitial silicate melt.

中文翻译：

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来自西澳大利亚坎巴尔达 Victor South-McLeay 的 Interspinifex Ni 硫化矿

在以科马提岩为主体的硫化物矿床中，存在于硫化物中的 Spinifex 纹理橄榄石板块通常被称为“interspinifex 矿石”。这种矿石类型很少见，但提供了有关硫化物矿床、科马提岩火山学和热机械侵蚀过程的重要遗传信息。Victor South-McLeay 和 Moran South（西澳大利亚坎巴尔达）的出矿在地层位置、矿石剖面内的位置和质地外观方面与之前报道的出矿有显着差异。因此，必须重新考虑它们的形成过程。此处报道的 Interspinifex 矿石位于海湾中心块状和网状硫化物之间以及块状硫化物和老玄武岩之间的基底熔岩流的下部，在“尖刺”处，硫化物从侧面熔化成老玄武岩海湾边缘。Interspinifex 矿石由块状硫化物上部长达 10 厘米的平行板聚集体组成，上面覆盖着贫瘠的科马提岩。纹理不允许经典的单一解释。因此，设想了两种可能的形成机制：（1）较年轻的科马提岩熔体侵入其自身的橄榄石和硫化物液体堆积堆，而硫化物仍然是液体。硫化物顶部的注入导致乳液的形成，由于熔体之间的温度梯度，从乳液中形成了刺。(2) Interspinifex 矿石是在科马提岩和硫化物液体的一系列连续脉冲中形成的早期科马提岩流的遗迹。科马提岩的棘突被较年轻的一批硫化物液体侵入，取代了间隙硅酸盐熔体。