Blar i forfatter "Burgisser, Alain"

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    • Conduit processes during the February 11, 2010 Vulcanian eruption of Soufriere Hills, Montserrat 

      Burgisser, Alain; Bechon, Tonin; Chevalier, Laure; Collombet, Marielle; Arbaret, Laurent; Forien, Melanie (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-01-29)
      We analyzed pumice from the February 11, 2010 Vulcanian explosion that immediately followed a large dome collapse at Soufrière Hills volcano. We obtained pre-explosive values of porosity, pressure, and depth by combining textural analyses and glass water content determinations. Our data suggest that the February 2010 explosion evacuated the upper 3 km of the conduit from the dense magma (≤10 vol% ...

    • The role of oxides in the shallow vesiculation of ascending magmas 

      Burgisser, Alain; Arbaret, Laurent; Martel, Caroline; Forien, Melanie; Colombier, Mathieu (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-10-01)
      Despite their generally low volume fraction, Fesingle bondTi oxides have the potential to greatly influence the eruptive style because they lower the supersaturation pressure for heterogeneous bubble nucleation. Once nucleated, bubbles respond fast to pressure changes, fostering rapid expansion and explosive behavior. Yet, oxide microlite quantifications are often absent from data of explosive ...