Ultradeep Xenoliths, Eclogites and Specific Mantle Minerals

四个研究课题将对地幔的矿物学、岩石学和地球化学产生实质性的制约，包括与碱性和玄武岩岩浆作用模拟有关的大离子亲石元素的源区和储存库。将对超深橄榄岩、超深和浅源榴辉岩、区域岩石圈交代作用和特定矿物(氧化物、钻石、石墨和锆石)进行重点分析和解释。卡普瓦尔和西非克拉通的选址是以大量现有数据为指导的，这些数据足够详细，以确保对岩石圈、软流圈和过渡带有新的见解和更好的定义。一个基本的前提和工作模式将是金伯利岩族岩浆、熔体交代作用，超深部钻石和捕虏体的输送是通过起源于核-地幔边界的羽流进行的。

Four research topics will materially constrain the mineralogy, petrology and geochemistry of the mantle, including source regions and repositories for large-ion-lithophile elements relevant to the modeling of alkali and basaltic magmatism. A focused analytical and interpretive program will be undertaken on ultradeep peridotites, eclogites of ultradeep and shallower origins, regional lithospheric metasomatism, and specific minerals (oxides, diamond, graphite, and zircon). Site selection in the Kaapvaal and West Africa cratons is guided by a body of existing data, sufficient in detail to assure new insights to, and greater definition of the lithosphere, the asthenosphere, and the transition zone. A basic premise and working model will be that kimberlitic clan magmas, melt metasomatism, and the transport of ultradeep diamonds and xenoliths is by plumes that originate at the core-mantle boundary.