Eruptive Styles at the Teide Volcanic Complex

• The wide variety of volcanic products composing the Teide VolcanicComplex (TVC) reflects an unusual assemblage of eruptive styles, with awide range of phenomena represented and only plinian and phreato-plinian styles truly lacking. This diversity is due to spatial and temporalvariations in magma composition (mafic magmas of the rift zones andfelsic magmas of the central edifice), variable magmatic volatile contentsand the interaction of magma with external water (snow, groundwater,etc.). Overall, strombolian eruptions are the most frequent eruptive styleat the TVC. Explosive eruptions of felsic material tend to be of lowvolume, for example, the largest explosive event during the Holocene, Montaña Blanca (ca. 2 ka), produced*0.2 km3DRE of phonoliticpumice during an eruptive sequence that reached explosivity of sub-plinian magnitude. Examples of phreatomagmatic activity (surge depos-its) have been described both on the northern flanks of Teide volcano aswell as from the summit area of Pico Viejo volcano. Until now moststudies on volcanic hazard assessment have focussed on ash fall and lavaflow hazards in the Canary Islands, but phreatomagmatic eruptions andtheir potential effects may have to be seriously considered as well.

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NATURVETENSKAP  -- Geovetenskap och miljövetenskap -- Multidisciplinär geovetenskap (hsv//swe)

NATURAL SCIENCES  -- Earth and Related Environmental Sciences -- Geosciences, Multidisciplinary (hsv//eng)

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