RT Journal Article
T1 Geochemistry and Fe speciation in active volcanic environments – the case of Fogo Island, Cape Verde
A1 Marques, Rosa
A1 Vieira, Bruno J. C.
A1 Prudencio, María Isabel
A1 Waerenborgh, João Carlos
A1 Dias, María Isabel
A1 Russo, Dulce
A1 Rocha, Fernando
A1 Silva, Teresa
A1 Ruiz Muñoz, Francisco
AB Topsoils developed in different geological formations/ages, and the top layer of the lava flow from the most recent eruption (2014/2015) of Fogo Island (Cape Verde archipelago), were studied. The specific objectives of this work are: i) to estimate the REE contents and patterns in the whole sample of topsoils developed on different geological formations/ages and their correlation with the iron speciation; and ii) to study the top layer of a lava flow from the most recent eruption after two years of exposure. REE contents are in general higher in the topsoils of the pre-caldera than in those developed on the post-caldera formation, particularly the light REE probably due to their incorporation into hematite. Positive Eu anomalies found in recent topsoils suggest the existence of hydrothermal processes with intrusion of hot fluids with higher concentration of Eu2+. In the top layer of the lava flow of the most recent eruption, Fe is incorporated in pyroxenes and iron oxides (magnetite and/or maghemite). This study can be a benchmark for further knowledge of the chemical evolution and weathering rate in semi-arid climate of Fogo Island.
PB EDP Sciences
SN 2267-1242
YR 2019
FD 2019
LK http://hdl.handle.net/10272/16819
UL http://hdl.handle.net/10272/16819
LA eng
NO Marques, R., Vieira, B.J.C., Prudencio, M.I., Waerenborgh, J.C., Dias, M.I., Russo, D., Rocha, F., Silva, T., Ruiz Muñoz, F.: "Geochemistry and Fe speciation in active volcanic environments – the case of Fogo Island, Cape Verde". E3S Web of Conferences. 98, 06009 (2019). https://doi.org/10.1051/e3sconf/20199806009
NO The authors would like to thank the financial support by Fundação para a Ciência e a Tecnologia (FCT, Portugal) through the projects UID/GEO/04035/2013 and UID/Multi/04349/2013.
DS Repositorio Institucional de la Universidad de Huelva
RD 2 jun 2026