NARVÁEZ , D. F.

The origin of several geochemical parameters in continental arc lavas (e.g., La/Yb, Ba/Th) is controversial as to whether it is imparted by the slab or acquired in the crust. In Ecuador, where volcanoes are built over a thick crust (∼50 km), this problem is grounded in the lack of primitive rocks. Here, we use melt inclusions hosted in Fo80-90...