RT Journal Article
T1 Edades 40Ar-39Ar del Complejo Basal de la isla de La Gomera
A1 Herrera, R.
A1 Huertas Coronel, María José
A1 Ancochea Soto, Eumenio
AB This essay shows some new dating of the Basal Complex of La Gomera Island and among them, the firstones obtained using the 40Ar-39Ar methodology. Two of them are rocks of the Submarine Edifice. In the firstone we obtain an age of 11,49 ± 0,66 Ma by the 40Ar-39Ar method, and in the second one 11,4 ± 1,6 Maby the K-Ar method. These ages reveal that the volcanic activity of the NW outcroping Submarine Edificeis approximately 11,5 Ma in age, close to the beginning of the Lower Old Edifice activity. The third sampledated also by the 40Ar-39Ar method, is from the only syenitic rocks outcrop of La Gomera (Tamargadasyenite); its age, 7,59 ± 0,81 Ma, confirms that these rocks represent the roots of one of the Old Edificefelsic episodes and that they do not belong to a felsic stage contemporary with the submarine growth ofthe island.
PB Sociedad Geológica de España
SN 0213-683X
YR 2008
FD 2008-05
LK https://hdl.handle.net/20.500.14352/50437
UL https://hdl.handle.net/20.500.14352/50437
LA spa
DS Docta Complutense
RD 1 may 2024