In situ oxygen-isotope, major-, and trace-element constraints on the metasomatic modification and crustal origin of a diamondiferous eclogite from Roberts Victor, Kaapvaal Craton

Riches A. J. V.; Ickert R. B.; Pearson D. G.; Stern R. A.; Jackson S. E.; Ishikawa A.; Kjarsgaard B. A.; Gurney J. J.

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In situ oxygen-isotope, major-, and trace-element constraints on the metasomatic modification and crustal origin of a diamondiferous eclogite from Roberts Victor, Kaapvaal Craton

机译：来自Kaapvaal Craton的Roberts Victor的菱形榴辉岩的交代修饰和地壳成因的原位氧同位素，主要和微量元素约束

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A subducted oceanic crustal origin for most eclogite xenoliths in kimberlites has long been a cornerstone of tectonic models for craton development. However, eclogite xenoliths often have protracted and complex histories involving multiple metasomatic events that could overprint some of the key geochemical indicators typically taken as evidence of a subducted origin (e.g., garnet delta O-18-values and mineral Sr-87/Sr-86 compositions). To assess the potential for disturbance of oxygen isotopic compositions in mantle eclogites via diamond-forming and other possible metasomatic fluids, we have conducted a multitechnique in situ study of a diamondiferous eclogite xenolith from the Roberts Victor kimberlite, S. Africa. Using SIMS we provide the first texturally-controlled in situ measurements of delta O-18-values in eclogitic garnet in close proximity to diamond.

机译：金伯利岩中大多数榴辉岩异岩的俯冲海洋地壳起源长期以来一直是克拉通发育构造模型的基石。但是，榴辉岩异岩通常具有长期的，复杂的历史，涉及多个交代事件，这些事件可能会套印一些通常被视为俯冲成因的关键地球化学指标（例如，石榴石三角洲O-18值和Sr-87 / Sr-86矿物）组成）。为了评估地幔榴辉岩中的氧同位素组成可能通过形成金刚石和其他可能的交代流体而受到扰动，我们对来自非洲南部的罗伯茨·维克多·金伯利特的含钻石榴辉岩异岩进行了多技术原位研究。使用SIMS，我们提供了在纹理上可控的就地测量石榴石中渐晕石榴石中O-18值的增量的方法，该方法非常接近钻石。

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《Geochimica et Cosmochimica Acta: Journal of the Geochemical Society and the Meteoritical Society》 |2016年第null期|共15页
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Riches A. J. V.; Ickert R. B.; Pearson D. G.; Stern R. A.; Jackson S. E.; Ishikawa A.; Kjarsgaard B. A.; Gurney J. J.;
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正文语种 eng
中图分类地球化学;天体化学;
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1. In situ oxygen-isotope, major-, and trace-element constraints on the metasomatic modification and crustal origin of a diamondiferous eclogite from Roberts Victor, Kaapvaal Craton [J] . Riches A. J. V., Ickert R. B., Pearson D. G., Geochimica et Cosmochimica Acta: Journal of the Geochemical Society and the Meteoritical Society . 2016,第Null期

机译：来自Kaapvaal Craton的Roberts Victor的菱形榴辉岩的交代修饰和地壳成因的原位氧同位素，主要和微量元素约束
2. Eclogites and garnet pyroxenites from Kimberley, Kaapvaal craton, South Africa: their diverse origins and complex metasomatic signatures [J] . Qiao Shu, Gerhard P. Brey, D. Graham Pearson Indian medical journal . 2018,第1期

机译：来自Kimberley，Kaapvaal Craton，南非的eClogites和石榴石Pyroxenites：他们多样化的起源和复杂的代表性签名
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机译：地壳岩石的熔化可能是中新世到北海道东北部的第四纪流纹岩的起源：Sr和Nd同位素的约束以及主要和微量元素化学
4. In situ oxygen-isotope, major-, and trace-element constraints on the metasomatic modification and crustal origin of a diamondiferous eclogite from Roberts Victor, Kaapvaal Craton. [O] . Riches A.J.V., Ickert R.B., Pearson D.G., 2016

机译：原位氧同位素，主要元素和痕量元素限制了Kaapvaal Craton的罗伯茨·维克托的菱形榴辉岩的交代修饰和地壳成因。

In situ oxygen-isotope, major-, and trace-element constraints on the metasomatic modification and crustal origin of a diamondiferous eclogite from Roberts Victor, Kaapvaal Craton

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