Collaborative Research: Causes of Isotopic Variability in Basalts from Southern California: Isotopic and ExperimentalStudies

这项研究的目的是确定玄武岩中有多少同位素变异性出现在地幔中，有多少是地壳相互作用的结果。它将包括(1)上地幔和地壳玄武岩包体的同位素调查，(2)同位素比值变化很大的火山地球化学研究，(3)结构不平衡的结构和微探针研究，以检验同位素研究预测的混合，以及(4)玄武岩岩浆与地壳地幔包体相互作用的实验研究。这项研究的成功结果应该会对美国西南部地幔的化学性质有相当大的帮助。

The purpose of this study is to determine how much isotopic variability in basalts arises in the mantle, and how much is a result of crustal interaction. It will consist of (1) an isotopic survey of upper mantle and crustal basalt-borne xenoliths, (2) detailed geochemical studies at volcanoes that show large variability in isotope ratios, (3) textural and microprobe studies of textural disequilibrium, in order to test for the mixing predicted by isotope studies, and (4) experimental studies of interaction between basalt magma and crustal mantle xenoliths. A successful outcome of this research should shed considerable light on the chemical nature of the mantle of the southwest United States.