2026-08-20T06:01:31Zhttps://docta.ucm.es/rest/oai/requestoai:docta.ucm.es:20.500.14352/582812023-08-26T20:03:02Zcom_20.500.14352_14col_20.500.14352_15
Docta Complutense
author
Ancochea Soto, Eumenio
author
Brandle, J.L.
author
Huertas Coronel, María José
author
Hernán, F.
author
Cubas, C.R.
2023-06-20T17:28:26Z
2023-06-20T17:28:26Z
1997-05
0213-683X
https://hdl.handle.net/20.500.14352/58281
http://www.sociedadgeologica.es/
The Central Vólcanic Complex I (CVC-I) consists maihly of mildly alkaline basalts, many of them
ankaramitic. The compositional differences observed are explained by fractíonation and extraction
(rates between 20% and 30%) of clinopyroxene (60%), olivine (20-25%) and titanomagnetite. The CVC-II
shows two different stages. The lower one of mildly alkaline affiníty has an age comprised between 20
and 22 Ma, the more alkalic: upper orle has a mote recent age about 18Ma. The crystallization models
for the lower stage are different depending on the composition considered to be the most primary or less
differentiated magma. The crystallization rates are comprised between 20 and 30%. The compositional
variation observed in the basalts from the upper stage may be due to crystallization rates from 20-25%,
mainly olivine (50c70%) and clinopyroxene. The transition to trachyandesites, both in the CVC-I and
the CVC-II¡ supposes a change in crystallization which is then dominated by cilinopyroxene and
plagioclase. The further transition to trachytes is a process controlled by plagioclase extraction.
spa
Características composicionales y procesos de evolución
magmática en el Complejo Volcánico Central (I y II) de
Fuerteventura (Islas Canarias)
journal article
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https://docta.ucm.es/bitstreams/1e686d4b-99cc-4cca-9a7d-f5168a18bc29/download
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297655
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1997_FTV_Composicion_CVC_I_y_II_Geogaceta.pdf
URL
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ad8f9e3326214c0441a023468818c8aa
19658
text/plain
1997_FTV_Composicion_CVC_I_y_II_Geogaceta.pdf.txt