ABSTRACT
The regional geochemical studies of volcanic rocks in Central America have been focused on the chemical variation of Pliocene to Holocene lavas [1-4] and Cretaeceous to Miocene accreted mafic to ultramafic rocks (“ophiolites” s.l.)[5-7]. In contrast, studies of the silicic ignimbrites and related deposits are not common, and studies integrating the variation of silicic volcanic deposits throughout Central America have not been done. Understanding the spatial geochemical variation of silicic volcanic deposits along the recent and old volcanic fronts is important to better constrain evolution of Central American arc volcanism. This understanding will lead to better models for this dangerous type of volcanic eruptions.
