RT Journal Article
T1 Composición y evolución de las lavas de la isla de Branco (Cabo Verde)
A1 Brandle, J.L.
A1 Hernán, F.
A1 Huertas Coronel, María José
A1 Ancochea Soto, Eumenio
AB The first data about the composition of lava flows from Branco Island (Cabo Verde) are presented in thiswork. Most lava flows in the sequence are alkali basalts (Fo84-76 olivine, En44-36 diopside, An83-31 plagioclase)showing geochemical affinity of typical ocean island basalts. The scarce most evolved members aremugearites (olivine absent, En41-31 clinopyroxene, An51-26 plagioclase, and kaersutite). The compositionalvariations between both the types are explained by crystal fractionation and extraction of pyroxene (up to29%) and lesser proportions of olivine and Fe and Ti oxides (Cpx: 75; Ol: 21; OxFeTi: 4). The transition tomugearites from the most evolved basalts would mainly be due to extraction of pyroxene (24%) and Feand Ti oxides (Cpx: 68; Ol: 3; Plag: 5; OxFeTi: 30).
PB Sociedad Geológica de España
SN 0213-683X
YR 2006
FD 2006-07
LK https://hdl.handle.net/20.500.14352/50435
UL https://hdl.handle.net/20.500.14352/50435
LA spa
DS Docta Complutense
RD 25 abr 2025