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

在墨西哥的索诺拉，从晚白垩世开始的多样化和丰富的岩浆活动记录重叠了两个区域性重要的变形事件——拉拉米德挤压和第三纪伸展，与北美西部相邻边缘的运动有关。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。研究结果将为理解索诺兰火山活动及其与美国西南部、墨西哥和加勒比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.