Pliocene to Recent Basic Magmatism in the East-Central Mexican Volcanic Belt

该项目将利用实地研究来确定空间和 上新世-现代基性火山岩时间分布 在MVB中东部 将对选定的样本进行分析， 主量元素、微量元素、Sr、Nd、Pb和O同位素 除了矿物的电子显微探针分析之外，还可以测量矿物的比例。 一些较老的岩石将采用K-Ar法测年。 该数据 将结合现有的基性火山岩数据， MVB开发和/或测试模型的起源基本 MVB中的岩浆，通过限制 这些基本岩浆的来源。 的 项目将确定存在于 各类基性火山岩的分布， 地壳结构，俯冲岩石圈的年龄和深度， 岩石的年龄。 它还将记录 各种类型的基性火山岩， 被认为是发生在与俯冲有关的火山弧中， 将提供一个基础， 分馏，和/或更多的污染钙碱性岩石， 明白

This project will use field studies to determine the spatial and temporal distribution of Pliocene to Recent basic volcanic rocks in the east-central MVB. Selected samples will be analyzed for major elements, trace elements, Sr, Nd, Pb, and O isotopic ratios, in addition to electron microprobe analyses of minerals. Some of the older rocks will be dated K-Ar methods. This data will be combined with existing data on basic volcanic rocks in the MVB to develop and/or test models for the origin of basic magmas in the MVB by placing constraints on the composition of materials contributing to the source of these basic magmas. The project will determine any correlation that exist between the distribution of the various types of basic volcanic rocks with crustal structure, age of and depth to the subducted lithosphere, and age of the rocks. It will also document the occurrence of various types of basic volcanic rocks that have only recently been recognized to occur in subduction-related volcanic arcs, and will provide a basis upon which the more common, more fractionated, and/or more contaminated calc-alkaline rocks can be understood.