Magmatic arcs developed at convergent plate margins play a key role in continental crust formation. Reconstructing the thickness and elevation of paleoarcs using the composition of igneous rocks and their zircons, here collectively referred to as chemical paleomohometry, represents a recent line of development in geochemistry with applications to tectonics, climate and beyond. Relying on the latest achievements of the project director and his team in paleomohometry and expanding the capabilities of their technique to maximize the informative value of detrital zircon chemistry, PACE aims to produce a major leap forward in the quantitative assessment of both the thickness and surface elevation of paleoarcs. Exploiting abundant modern arc data including thickness, topography, as well as the chemistry of hosted volcanics and their zircons, as a first step, PACE proposes to calibrate a set of robust and efficient mohometers relying on zircon trace elements, which along with whole-rock mohometers will tighten constraints on the elevation and crustal thickness of paleoarcs. Then, by applying these mohometers to areas well characterized by whole-rock and detrital zircon data, GPlates-based paleotopographic and paleo-Moho maps of a series of Phanerozoic orogens will be generated. Whole-rock and zircon data acquired during the project will complement data from the literature in order to accomplish this task. Finally, we will evaluate the role of convergent margin magmatism in the compositional evolution of continental crust by combining mohometric results with whole-rock chemical information obtained either from direct measurements, or indirectly by interrogating zircon crystals for their trace element concentrations and Zr isotopes. This will then be used to address the relationship between thickness of crustal domains and their mean differentiation degree viewed through the lens of silica contents in magmatic rocks.