Paraná magmatic Province-Tristan da Cunha plume system: fixed versus mobile plume, petrogenetic considerations and alternative heat sources - Ernesto, Márcia; Marques, Leila Soares; Piccirillo, Enzo Michele; Molina, Eder Cassola; Ussami, Naomi; Comin-Chiaramonti, P.; Bellieni, Giuliano (Journal of Volcanoogy and Geothermal Research, 2002)