Geochronology and Geochemistry of Late Cretaceous-Tertiary Magmatism Across Central Sonora, Mexico, and Its Tectonic Significance

在墨西哥索诺拉，晚白垩世以来丰富多样的岩浆活动记录与两个具有区域重要性的变形事件--拉莱姆挤压和第三纪伸展--重叠在一起，与北美西部邻近边缘的运动有关。该项目将通过K/Ar和U/Pb技术显著扩展复杂岩浆带的地质年代学和地球化学信息。这些结果将为理解索诺兰火山作用及其与美国西南部、墨西哥和加勒比海地区板块相互作用的关系提供一个框架。

In Sonora, Mexico, a diverse and prolific record of magmatism from Late Cretaceous onward overlaps two regionally important deformational events - Laramide compression and Tertiary extension, associated with motion along the adjacent margin of western North America. This project will significantly expand geochronologic and geochemical information across the complex magmatic belt by K/Ar and U/Pb techniques. Results will provide a framework for understanding Sonoran volcanism and its relationships to plate interactions in the southwestern U.S., Mexico and the Caribbean.