RT Journal Article
T1 Age and composition of the Amanay Seamount, Canary Islands
A1 Ancochea Soto, Eumenio
A1 Huertas Coronel, María José
AB A number of samples have been dredged from the upper parts of Amanay and El Banquete Seamounts, yet volcanic materials have been collected only on Amanay Seamount. Based on textural features and the presence or absence of kaersutite, two main types of olivine pyroxene basaltic rocks have been identified. The rocks are basanites with high enrichment in the most incompatible elements, similar to that displayed by Ocean Island Basalts. Samples from Amanay Seamount formed due to a low degree of melting of an enriched mantle, very similar to that which probably caused the Miocene volcanic activity of Fuerteventura. The age of Amanay volcanic rocks, 15.3 ± 0.4 and 13.1 ± 0.3 Ma, is similar to those of the older volcanic units exposed in the nearby islands (Gran Canaria, Fuerteventura and Lanzarote). This proves the formation of a separate submarine volcanic edifice coeval with the other edifices of the Eastern Canarian Volcanic Ridge. Volcanic activity on the submarine edifice is thought to have ceased at about 13 Ma, simultaneous with the adjacent main volcanic construction.
PB Springer Nature
SN 0025-3235
YR 2003
FD 2003
LK https://hdl.handle.net/20.500.14352/50442
UL https://hdl.handle.net/20.500.14352/50442
LA eng
DS Docta Complutense
RD 6 abr 2025