ROW: Petrogenesis of Late Cenozoic Mafic Lavas From the Southern Rio Grande Rift, New Mexico

格兰德河裂谷是一个主要的构造和火山特征， 美国西南部。 本研究报告将 晚新生代岩石学和地球化学特征 大裂谷南部新墨西哥州的熔岩。 重点 将被放置在大陆熔体生成的动力学 裂谷带和化学和同位素性质的 陆下地幔 在地球化学上， 北方的研究;南方的研究很少 比较详细的研究。 这是研究的第一阶段 它将尝试用详细的 新南地区三个不同油气田地层研究 墨西哥 熔岩的主元素和微量元素组成， 斑晶、捕虏晶和幔源捕虏体， 用于模拟源岩岩性、岩浆生成深度， 熔体演化

The Rio Grande Rift is a major tectonic and volcanic feature of the southwestern United States. The study proposed here will characterize the petrology and geochemistry of late Cenozoic lavas in the southern New Mexico portion of the Rift. Emphasis will be place on the dynamics of melt generation in continental rift zones and the chemical and isotopic nature of the subcontinental mantle. There have been a number of geochemical studies in the northern portion; the southern part has had few studies of comparable detail. This is the first stage of a study which will attempt to remedy the deficiency with detailed stratigraphic study of three different fields in southern New Mexico. Major-and trace-element compositions of the lavas, phenocrysts, xenocrysts, and mantle-derived xenoliths will be used to model source lithology, depth of magma generation, and melt evolution.