RUI: Geochemical and Petrologic Investigations of Crustal Rocks and Xenoliths from Southern Chile, 41o-41o45'S

本文研究了智利Osorno火山和Calbuco火山地区410 ~ 4150′S近代火山岩、基岩和捕虏体的岩石学特征、主要元素和微量元素特征。该研究的目的是确定大陆地壳在影响两个层状火山和沿着一条主要地壳断裂Liquine-Ofqui断裂带排列的一系列小型单成因喷发中心（MEC）喷发的岩浆组成中的作用。一个具体的目标是区分地壳成分对比与同化的绝对程度在影响岩浆成分方面的重要性。将开展的项目有：1)利用ICPES对火山岩进行主微量元素分析；2)古生代基底岩的收集与分析，包括电子探针矿物分析；3)对先前收集的麻粒岩壳包体进行矿物分析。这些数据将有助于建立该地区岩浆演化的定量模型。

This research is an investigation of the petrologic, major and trace element characteristics of recent volcanic rocks, basement rocks and xenoliths from the region of Osorno and Calbuco volcanoes, 41o-41o45' S, Chile. The objective of the research is to determine the role of the continental crust in influencing the composition of magmas erupted at the two stratovolcanoes and a chain of small monogenetic eruptive centers (MEC) that are aligned along the Liquine-Ofqui Fault Zone, a major crustal fracture. A specific goal is to distinguish the importance of contrast in crustal composition versus the absolute extent of assimilation in influencing magma composition. Individual projects to be carried out are: 1) the analysis of volcanic rocks for major and trace elements by ICPES, 2) collection and analysis of Paleozoic basement rocks, including mineral analysis by electron microprobe, and 3) mineral analysis of granulite crustal xenoliths collected previously. These data will help to develop quantitative models for the evolution of magma in this region.