Did Westward Subduction Cause Cretaceous-Tertiary Orogeny in the North ... - Robert S. Hildebrand - Google Books

https://books.google.de/books?id=BNm12eLbQA0C&printsec=frontcover&hl=de#v=onepage&q&f=false

Within the Sonora segment to the south, break-off magmatism was also prevalent. Both the Canadian and Sonoran segments have abundant porphyry copper mineralization temporally and spatially associated with the break-off magmas, which suggests a genetic link…