Procesos de transformación y neoformación de esmectitas en los materiales volcanoclásticos de la Isla de la Palma (Canarias)

Abstract

Clay minerals from the volcaniclastic deposits of the three different sedimentary settings (paleosols continental lacustrine and transitional fan delta) have been studied by X-ray, MEB y TEM. The clay fraction of Ihis sediments consist largely of smectite (saponite) with minor irregular chlorile-smectite mixed layers and illite: they occur as replacement of ferromagnesian minerals, plagioclase microlites and glass matrix of the volcarenite and they are inferred to be direct diagenetic alteratíon products of volcanic components.