Li Isotopic Investigations of the Crust and Mantle

Rudnick 0106719这个试点项目将描述地球地幔的Li同位素组成。 该项目将集中于溶液和激光引入Li到我们的Nu等离子体多接收器ICP-MS中。我们将开始分析溶液中的国际岩石标准，然后将继续从橄榄岩中分离矿物（橄榄石，斜方辉石和单斜辉石）。 我们的最终目标是确定在地球的地幔中的锂同位素值的范围内，采样的各种橄榄岩包体来自岩石圈的可变年龄和构造环境，经历了各种交代叠印过程。 此外，我们希望建立共存相之间的同位素不均匀性的程度。

Rudnick0106719This pilot project will characterize the Li isotopic composition of the Earth's mantle. This project will concentrate on both solution and laser introduction of Li to our Nu plasma multicollector ICP-MS. We will begin by analysing international rock standards in solution, then will proceed with mineral separates from peridotites (olivine, orthopyroxene and clinopyroxene). Our ultimate goal is to determine the range of Li isotope values in the Earth's mantle, as sampled by a variety of peridotitic xenoliths derived from lithosphere of variable ages and tectonic settings that have experienced a variety of metasomatic overprinting processes. In addition, we hope to establish the degree of isotopic heterogeneity between coexisting phases.