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Spectral Emissivity of Phonolite Lava at High Temperature
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In: ISSN: 0196-2892 ; IEEE Transactions on Geoscience and Remote Sensing ; https://hal-insu.archives-ouvertes.fr/insu-03433900 ; IEEE Transactions on Geoscience and Remote Sensing, Institute of Electrical and Electronics Engineers, 2021, Accepted Manuscript, pp.1-15. ⟨10.1109/TGRS.2021.3104657⟩ (2021)
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Pre-eruptive conditions at satellite vent eruptions at Teide-Pico Viejo complex (Tenerife, Canary Islands)
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In: ISSN: 0024-4937 ; Lithos ; https://hal-insu.archives-ouvertes.fr/insu-03211846 ; Lithos, Elsevier, 2021, 396-397, pp.106193. ⟨10.1016/j.lithos.2021.106193⟩ (2021)
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Controls of magma chamber zonation on eruption dynamics and deposits stratigraphy: The case of El Palomar fallout succession (Tenerife, Canary Islands)
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In: ISSN: 0377-0273 ; Journal of Volcanology and Geothermal Research ; https://hal-insu.archives-ouvertes.fr/insu-02569124 ; Journal of Volcanology and Geothermal Research, Elsevier, 2020, 399, pp.106908. ⟨10.1016/j.jvolgeores.2020.106908⟩ (2020)
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Mechanisms controlling explosive-effusive transition of Teide-Pico Viejo complex dome eruptions
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In: EGU 2020 ; https://hal-insu.archives-ouvertes.fr/insu-02569982 ; EGU 2020, May 2020, Vienna, Austria. ⟨10.5194/egusphere-egu2020-199⟩ (2020)
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Mechanisms controlling explosive-effusive transition of Teide-Pico Viejo complex dome eruptions.
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In: EGU General Assembly 2020 ; https://hal.archives-ouvertes.fr/hal-03554446 ; EGU General Assembly 2020, May 2020, Online, France. ⟨10.5194/egusphere-egu2020-199⟩ (2020)
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Abstract:
International audience ; The Teide-Pico Viejo (PT-PV) stratovolcanoes constitute one of the major potentially active volcanic complexes in Europe. PT-PV was traditionally considered as non-explosive system however, recent studies (ie. García et al. 2014) have pointed out that the explosive character of phonolitic magmas, including plinian and subplinian eruptions and generation of pyroclastic density currents, have also been significant within the last 30 kyr volcanological record. This explosive activity is mostly associated to satellite dome vents, like the one studied in this work, Pico Cabras. Dome-forming eruptions usually present sudden transitions between explosive and effusive activity. A better knowledge of this type of eruptions and about the main mechanisms controlling the changes in eruptive dynamics is required to undertake a comprehensive volcanic hazard assessment of Tenerife Island. In this study, we conduct a petrological and mineral characterization of the different eruption phases of Pico Cabras (pumice and lava flow samples for the explosive and effusive activity, respectively) with the aim of determining the factors that control these changes in the volcanic activity. Products were characterized with Scanning Electrom Microscope, and mineral phases, glass and volatile species (F, Cl) were analysed with electron microprobe and micro-XRF. The pre-eruptive conditions of the magma (pressure, temperature and water dissolved in the magma) were determined first by using available geothermobarometers, geohygrometers (Masotta et al., 2013; Mollo et al., 2015) and compared to those retrieved by using available phase equilibria experiments from the literature (ie. Andújar and Scaillet, 2012).Our results suggest the presence of a compositionally stratified magma chamber at 1 kbar±0.5kbar prior to Pico Cabras eruption in which the differences in the eruptive styles are controlled by the temperature and the amount of volatiles dissolved in the melt. The explosive phase is related to the upper part of the magma chamber at 725°C±25°C and 3,5-5 wt% H2O and the effusive phase with the main body of the chamber at 880°C±30°C and 2,5-3 wt% H2O. Feldspar zonations show that overturn events occurred in the different layers of the magma chambers ("self-mixing") and suggest that the eruption was triggered by underplating of mafic magma without magma mixing. Chemical composition of some feldspars from the explosive phase are equivalent to those found in El Abrigo eruption, the last caldera-forming episode (ca. 190 ka), demonstrating that PT-PV volcanic system is still capable of producing evolved and very explosive magmas.This research has been partially funded by a CSIC JaeIntro grant and the EC Grant EVE (DG ECHO Ref: 826292).
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Keyword:
[SDU.STU]Sciences of the Universe [physics]/Earth Sciences
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URL: https://hal.archives-ouvertes.fr/hal-03554446/document
https://hal.archives-ouvertes.fr/hal-03554446
https://doi.org/10.5194/egusphere-egu2020-199
https://hal.archives-ouvertes.fr/hal-03554446/file/EGU2020-199-print.pdf
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Phonolites, s-solubility and sodalite-haüyne stability
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In: Geological Society of America (GSA2020) ; https://hal.archives-ouvertes.fr/hal-03043620 ; Geological Society of America (GSA2020), Oct 2020, United States, United States (2020)
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A radiography of Teide-Pico Viejo active volcanic complex, Tenerife, Canary Islands
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In: Geophysical Research Abstracts ; EGU General Assembly 2019 ; https://hal-insu.archives-ouvertes.fr/insu-02301534 ; EGU General Assembly 2019, Apr 2019, Vienne, Austria. pp.2019 - 18237 (2019)
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Toward accurate magma temperature determination: in situ direct emissivity measurements of phonolite Teide and Erebus volcanos
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In: EGU General Assembly 2019 ; https://hal-insu.archives-ouvertes.fr/insu-02301606 ; EGU General Assembly 2019, Apr 2019, Vienne, Austria. pp.2019 - 17168 (2019)
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A radiography of Teide-Pico Viejo active volcanic complex, Tenerife, Canary Islands
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In: 21st EGU General Assembly ; https://hal.archives-ouvertes.fr/hal-03554113 ; 21st EGU General Assembly, 2019, Vienne, Austria (2019)
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Toward accurate magma temperature determination: in situ direct emissivity measurements of phonolite Teide and Erebus volcanos
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In: 21st EGU General Assembly ; https://hal.archives-ouvertes.fr/hal-03554115 ; 21st EGU General Assembly, 2019, Vienne, Austria (2019)
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Megacrystals track magma convection between reservoir and surface
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In: ISSN: 0012-821X ; Earth and Planetary Science Letters ; https://hal-insu.archives-ouvertes.fr/insu-01124396 ; Earth and Planetary Science Letters, Elsevier, 2015, 413, pp.1-12. ⟨10.1016/j.epsl.2014.12.022⟩ (2015)
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Storage conditions and eruptive dynamics of central versus flank eruptions in volcanic islands: the case of Tenerife (Canary Islands, Spain)
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In: ISSN: 0377-0273 ; Journal of Volcanology and Geothermal Research ; https://hal-insu.archives-ouvertes.fr/insu-00827722 ; Journal of Volcanology and Geothermal Research, Elsevier, 2013, 260, pp.62-79. ⟨10.1016/j.jvolgeores.2013.05.004⟩ (2013)
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Relationships between pre-eruptive conditions and eruptive styles of phonolite-trachyte magmas
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In: ISSN: 0024-4937 ; Lithos ; https://hal-insu.archives-ouvertes.fr/insu-00705854 ; Lithos, Elsevier, 2012, 152 (1), pp.122-131. ⟨10.1016/j.lithos.2012.05.009⟩ (2012)
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Experimental Constraints on Parameters Controlling the Difference in the Eruptive Dynamic of Phonolitic Magmas: the case from Tenerife (Canary Islands)
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In: ISSN: 0022-3530 ; EISSN: 1460-2415 ; Journal of Petrology ; https://hal-insu.archives-ouvertes.fr/insu-00715847 ; Journal of Petrology, Oxford University Press (OUP), 2012, 53 (9), pp.1777-1806. ⟨10.1093/petrology/egs033⟩ (2012)
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| 15 |
Experimental Constraints on Parameters Controlling the Difference in the Eruptive Dynamics of Phonolitic Magmas: the Case of Tenerife (Canary Islands)
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Magma storage conditions of the last eruption of Teide volcano (Canary Islands, Spain)
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In: Bulletin of Volcanology / Bull Volcanic Eruptions ; https://hal-insu.archives-ouvertes.fr/insu-00447691 ; Bulletin of Volcanology / Bull Volcanic Eruptions, 2010, 72, pp.381-395. ⟨10.1007/s00445-009-0325-3⟩ (2010)
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