Processes of Granulite Formation and Their Geochemical Signatures: A Study in the Wind River and Laramie Mountains,Wyoming

麻粒岩的起源问题对 广泛的地球科学家，因为今天 地表露头被认为是 无论过去还是现在都在下地壳活动 拟 研究麻粒岩变质作用的成因， 角闪石分解的地球化学效应。 击穿 将在接触光环的两个地方进行研究， 拉勒米斜长岩。 在一个地方， 简单的脱水，而在其他故障是响应 与相邻大理石的二氧化碳流有关 这两种机制 已经被认为是 麻粒岩变质作用 拉勒米斜长岩的研究结果 调查将适用于解释的起源 风河山脉的红鸢 将尝试 确定该国麻粒岩边缘的起源 紫苏花岗岩脉岩 将制定标准， 火成紫苏玄岩与麻粒岩片麻岩的区别 变质于麻粒岩相。 这项研究将利用野外制图、岩石学、电子学 微探针分析，稳定和放射性同位素分析， 推断麻粒岩的形成过程及其 地球化学特征

The problem of the origin of granulites is of interest to a wide cross-section of Earth Scientists because present-day surface outcrops are believed to give clues to processes operating, past and present, in the lower crust. It is proposed to study the causes of granulite metamorphism and to identify the geochemical effects of hornblende breakdown. The breakdown will be studied in two places in the contact aureole of the Laramie Anorthosite. In one locality hornblende breakdown due to simple dehydration, while in other breakdown is in response to CO2-fluxing from adjacent marble. Both of these mechanisms of hornblende decomposition have been proposed as causes of granulite metamorphism. The results of the Laramie Anorthosite investigation will be applied to interpreting the origins of charnockites in the Wind River Mtns. An attempt will be made to determine the origin of granulite selvages in the country rock of charnockite dikes. Criteria will be established for distinguishing igneous charnockites from granulite gneisses metamorphosed in the granulite facies. The research will use field mapping, petrology, electron microprobe analyses, stable and radiogenic isotope analyses to deduce the processes of granulite formation and their geochemical signatures.