Geochemical evolution of soils developed from pyroclastic rocks of Trindade Island, South Atlantic

The geochemical behavior of the major, minor, trace and rare earths elements (REEs) in soil profiles from ultramafic volcanoclastic rocks Vulcão do Paredão Morro Vermelho Formation Trindade Island (TI) was analyzed this study. Losses gains chemical were calculated through mass balance for two along slope: one located at higher altitude (460 m) other lower (258 m). In all profiles, Al, Fe Ti accumulate due to their low mobility, whereas Ca, Na, K Mg are most intensely leached. Soils show values surface contribution saline sprays. Leaching REEs slope led enrichment these elements, especially light REEs, lowest high profile showed Ce positive anomaly longer exposure weathering. shows a relative Ti, Mn, Fe, Co, Cr, Ni, V, Zr, S related loss mobile during formation process, despite youthful nature volcanic rocks.