Petrogenesis of Mantle Eclogites from Yakutia, Siberian Craton

本项目研究了中国大陆四个新的榴辉岩捕虏体地点， 雅库特，西伯利亚。 它将提供一个三维视图， 在不同深度和距离克拉通的克拉通建筑群 边缘 有很多猜测和讨论， 金伯利岩中榴辉岩包裹体的成因 有利于高压火成岩分馏作用，而其他低压火成岩分馏作用 压力火成分馏作用 这项研究将比较和 对比相关的化学和同位素特征， 把卡普瓦尔和西伯利亚的古罗马人分开 这家跨国 方法将包括岩相学和矿物化学分析 精选捕虏体该研究将包括交流 美国和苏联之间的科学人员 联盟将选择一个代表性的套房， 全岩、主量元素和微量元素分析以及O、Rb-Sr、Sm-Nd、 U-Pb和Re-Os同位素分析。 最后，PI将使用 对榴辉岩捕虏体的综合研究结果表明， 西伯利亚克拉通，沿着与其他数据，以实现一个更 地幔榴辉岩形成的完整全球图像 以及古老古龙的结构和演化。

This project is to study four new eclogite xenolith localities from Yakutia, Siberia. It will provide a three-dimensional view of the craton edifice at various depths and distances from the craton edge. There has been much speculation and discussion over the petrogenesis of eclogite inclusions in kimberlite with some authors favoring high pressure igneous fractionation and others low pressure igneous fractionation. This study will compare and contrast pertinent chemical and isotopic signatures from the widely separated Kaapvaal and Siberian cratons. This multinational approach will include petrographic and mineral-chemical analyses of selected xenoliths. The study will include an exchange of scientific personnel between the United States and the Soviet Union. A representative suite will be chosen for further whole-rock, major-and trace-element analyses and O, Rb-Sr, Sm-Nd, U-Pb, and Re-Os isotopic analyses. Finally, the PI will use the results of this comprehensive study of the eclogite xenoliths of the SIberian craton, along with other data, to achieve a more complete and global picture of the formation of mantle eclogites and the structure and evolution of old cratons.