St. Kitts lies in the northern Lesser Antilles, a subduction-related intraoceanic volcanic arc
known for its magmatic diversity and unusually abundant cognate xenoliths. We combine the
geochemistry of xenoliths, melt inclusions and lavas with high pressure–temperature
experiments to explore magma differentiation processes beneath St. Kitts. Lavas range from
basalt to rhyolite, with predominant andesites and basaltic andesites. Xenoliths, dominated
by calcic plagioclase and amphibole, typically in reaction relationship with pyroxenes and …