REU: Sm-Nd Isotopic Investigations and Crustal Growth Within the Adirondack Mountains and Mid-Proterozoic Inliers of the Northeastern Appalachians (Mass., N.J., N.Y., VT.)

前寒武纪构造学的一个基本问题是 从地壳中提取地壳物质的时间和数量 地幔及其对地壳的补充 然而已经 很难区分新增加的和再循环的旧地壳 材料 该项目将采用同位素技术来建立 Nd-model年龄和固定的时间，因为父母的材料， 从地幔中分离出来的岩石 结合U-Pb年龄， 这些数据将使新材料的估计， 东北阿巴拉契亚山脉在晚元古代（1300-1000 Ma）。

A fundamental question for pre-Cambrian tectonics is the timing and amounts of extraction of crustal material from the mantle and its addition to the crust. However, it has been difficult to distinguish new additions from recycled older crustal material. This project will employ isotopic technique to establish Nd-model ages and fix the time since the parental material of the rocks separated from the earth's mantle. Coupled with U-Pb ages, these data will allow the estimation of new materials to the Northeastern Appalachians during late proterozoic time (1300-1000 Ma).