Evolution of Laramide Igneous Rocks Related to Mineralization in Southern Arizona: A Trace-Element and Nd-Sr Isotope Study

本项目旨在建立美国亚利桑那州东南部和西北部的Laramide岩浆活动与成矿作用之间的关系，这两个地区下伏地壳基底岩石的性质和年龄存在差异。此外，还比较了矿化与非矿化火成岩的地球化学特征。这些数据将有助于确定矿化发生的原因。这些结果将证明对矿产勘探模式的概念化以及下伏地壳在多大程度上是金属的最终来源是有用的。

This project is aimed at establishing the relationship between Laramide magmatic activity and mineralization in southeastern and northwestern Arizona where there are differences in the nature and age of underlying crustal basement rocks. In addition, geochemical characteristics of mineralized and non- mineralized igneous bodies will be compared. These data will help determine why mineralization occurs where it does. The results will prove useful to conceptualization of mineral exploration models and to what extent the underlying crust serves as the ultimate source of metals.