Isotopic Study of Eclogite Xenoliths in Kimberlites

本文对榴辉岩进行了岩石学、地球化学和同位素研究 南澳大利亚罗伯茨维克托矿金伯利岩管中的捕虏体 非洲，并从科罗拉多州-怀俄明州州线区在 联合S. 将使用标准岩石学方法，然后使用Sm- Nd、Rb-Sr、U-Pb和Lu-Hf同位素研究。 此外 稀土元素、钾和钡的含量 将测量榴辉岩的组成矿物。 最后， 分析将由O和H同位素组成， 含水相，这些将与类似的 石榴石和单斜辉石共存的测量。 的 最终目标是更好地理解火成岩，交代， 和热液过程，有助于 地壳-地幔系统

This is a petrologic, geochemical and isotopic study of eclogite xenoliths in kimberlite pipes of the Roberts Victor mine in South Africa, and from the Colorado-Wyoming state line district in the U. S. Standard petrologic methods will be used, followed by Sm- Nd, Rb-Sr, U-Pb and Lu-Hf isotope studies. In addition Concentration of rare-earth elements, K, and Ba in the constituent minerals of the eclogites will be measured. Finally, analyses will be made of O and H isotopic compositions from the hydrous phases and these will be compared with similar measurements from coexisting garnets and clinopyroxenes. The ultimate goal is to better understand the igneous, metasomatic, and hydrothermal processes which contribute to the evolution of the earth's crust-mantle system.