Publication: Geometría del enjambre de diques cónicos de Vallehermoso
La Gomera (Islas Canarias)
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Publication Date
2000-05
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Sociedad Geológica de España
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Abstract
A mainly phonolitic, 10 km in diameter, cone-sheet complex crops out on the northern area of La Gomera.
The swarm intrudes into the Basal Complex, The Old BasaIts and other rocks of the Trachytic-phonolitic
Complex to which they belong. The cone-sheet complex center lies south of Vallehermoso. Most of the
dykes in the care of the structure are "conic dome-sheets" which start to be evidenced 400m far from
the center and dip over 50°. In the surrounding area the dome-sheets are less frequent while simple canesheets
are more abundant and dip more gently towards the periphery. From the analysis of their dips and
distribution a single conic structure is deduced. The cane-sheets were originally connected to a hypothetical
dome-shaped magmatic body whose uppermost part is at present located 7350m under sea level.