On the detectability of Teide volcano magma chambers (Tenerife, Canary Islands) with magnetotelluric data

Perla Piña-Varas, Juanjo Ledo, Pilar Queralt, Alex Marcuello, Nemesio Perez

    Research output: Contribution to journalLetter

    Abstract

    Tenerife has been the subject of numerous studies covering a wide range of fields. Many studies have been focused on characterising the magmatic plumbing system. Even so, a controversy still exists regarding the location and size of the current magma chambers. Several magnetotelluric (MT) surveys have been carried out in the island, but no conductivity anomalies associated with the chambers have been detected. We report the results of a set of tests conducted against the 3-D resistivity model of the island, to determine the characteristics of the detectable chambers with the MT data. The most remarkable results indicate that the MT dataset is incompatible with a large-scale mafic reservoir located at shallower depths than 8 km b.s.l. However, shallower phonolitic chambers smaller than 3 × 3 × 1 km3 could be undetected by the existing MT sites and new data should be acquired to confirm or not their existence. This new information is essential in volcanic islands like Tenerife, since many volcanic hazards are related to the size and depth of the sources of magma. Additionally, a joint interpretation of the obtained results together with other information is summarised in a hypothetical model, allowing us to better understand the internal structure of the island.[Figure not available: see fulltext.].

    LanguageEnglish
    Article number14
    JournalEarth, Planets and Space
    Volume70
    Issue number1
    DOIs
    StatePublished - 1 Dec 2018

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    Canary Islands
    magma chamber
    volcanoes
    magma
    volcano
    chambers
    volcanology
    volcanic island
    electrical resistivity
    conductivity
    hazard
    hazards
    anomaly
    coverings
    anomalies

    Cite this

    Piña-Varas, Perla ; Ledo, Juanjo ; Queralt, Pilar ; Marcuello, Alex ; Perez, Nemesio. / On the detectability of Teide volcano magma chambers (Tenerife, Canary Islands) with magnetotelluric data. In: Earth, Planets and Space. 2018 ; Vol. 70, No. 1.
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    abstract = "Tenerife has been the subject of numerous studies covering a wide range of fields. Many studies have been focused on characterising the magmatic plumbing system. Even so, a controversy still exists regarding the location and size of the current magma chambers. Several magnetotelluric (MT) surveys have been carried out in the island, but no conductivity anomalies associated with the chambers have been detected. We report the results of a set of tests conducted against the 3-D resistivity model of the island, to determine the characteristics of the detectable chambers with the MT data. The most remarkable results indicate that the MT dataset is incompatible with a large-scale mafic reservoir located at shallower depths than 8 km b.s.l. However, shallower phonolitic chambers smaller than 3 × 3 × 1 km3 could be undetected by the existing MT sites and new data should be acquired to confirm or not their existence. This new information is essential in volcanic islands like Tenerife, since many volcanic hazards are related to the size and depth of the sources of magma. Additionally, a joint interpretation of the obtained results together with other information is summarised in a hypothetical model, allowing us to better understand the internal structure of the island.[Figure not available: see fulltext.].",
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    On the detectability of Teide volcano magma chambers (Tenerife, Canary Islands) with magnetotelluric data. / Piña-Varas, Perla; Ledo, Juanjo; Queralt, Pilar; Marcuello, Alex; Perez, Nemesio.

    In: Earth, Planets and Space, Vol. 70, No. 1, 14, 01.12.2018.

    Research output: Contribution to journalLetter

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    AU - Ledo,Juanjo

    AU - Queralt,Pilar

    AU - Marcuello,Alex

    AU - Perez,Nemesio

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