Olivine is the most abundant phase in kimberlites and is stable throughout most of the crystallisation sequence, thus providing an extensive record of kimberlite petrogenesis. To better constrain the composition, evolution, and source of kimberlites we present a detailed petrographic and geochemical study of olivine from multiple dyke, sill, and root zone kimberlites in the Kimberley cluster (South Africa). Olivine grains in these kimberlites are zoned, with a central core, a rim overgrowth, and occasionally an external rind. Additional ‘internal’ and ‘transitional’ zones may occur between the core and rim, and some samples of root zone kimberlites contain a late generation of high-Mg olivine in cross-cutting veins.

中文翻译：

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岩石层的金伯利岩交代作用和富碳酸盐熔岩中橄榄石的演化-金伯利金伯利岩的证据（南非）

橄榄石是金伯利岩中最丰富的相，并且在大多数结晶序列中都是稳定的，因此提供了金伯利岩成岩的广泛记录。为了更好地限制金伯利岩的组成，演化和来源，我们对金伯利星团（南非）中多个堤坝，基岩和根区金伯利岩的橄榄石进行了详细的岩石学和地球化学研究。这些金伯利岩中的橄榄石颗粒被划分为一个区域，具有中心核心，边缘过度生长和偶尔的外皮。在核心和边缘之间可能会出现其他“内部”和“过渡”区域，并且根区金伯利岩的一些样本在横切静脉中含有较晚生成的高镁橄榄石。