Final published version, 1.81 MB, PDF document
Available under license: CC BY: Creative Commons Attribution 4.0 International License
Final published version
Licence: CC BY: Creative Commons Attribution 4.0 International License
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Degassing-induced chemical heterogeneity at the 2011-2012 Cordón Caulle eruption
AU - Paisley, Rebecca
AU - Berlo, Kim
AU - Whattam, Jack
AU - Schipper, C. Ian
AU - Tuffen, Hugh
PY - 2019/11/26
Y1 - 2019/11/26
N2 - Low H2O concentrations preserved in the erupted products from the 2011-2012 eruption at Cordón Caulle, Chile, have limited its use as a recorder of the shallow degassing processes responsible for the observed hybrid activity. However, volatile trace element heterogeneity (e.g. Li, Pb, Tl) is observed in different textural domains (e.g. breccias, tuffisites), which each represent the competing processes of fracturing, gas fluxing and melt relaxation occurring at different locations within the upper conduit. Elemental depletions in tuffisite veins record scavenging of metals by the fluxing gas phase. Preserved concentration gradients indicate deep-conduit degassing events are short-lived (~minutes), whilst late-stage activity involves hours of gas venting from a single location. Later-erupted material is more degassed than earlier-erupted bombs indicating a progressive loss of volatiles with eruption duration. Combining in situ textural and volatile trace element analyses can constrain evolving degassing processes in systems that are depleted in H2O and CO2
AB - Low H2O concentrations preserved in the erupted products from the 2011-2012 eruption at Cordón Caulle, Chile, have limited its use as a recorder of the shallow degassing processes responsible for the observed hybrid activity. However, volatile trace element heterogeneity (e.g. Li, Pb, Tl) is observed in different textural domains (e.g. breccias, tuffisites), which each represent the competing processes of fracturing, gas fluxing and melt relaxation occurring at different locations within the upper conduit. Elemental depletions in tuffisite veins record scavenging of metals by the fluxing gas phase. Preserved concentration gradients indicate deep-conduit degassing events are short-lived (~minutes), whilst late-stage activity involves hours of gas venting from a single location. Later-erupted material is more degassed than earlier-erupted bombs indicating a progressive loss of volatiles with eruption duration. Combining in situ textural and volatile trace element analyses can constrain evolving degassing processes in systems that are depleted in H2O and CO2
U2 - 10.30909/vol.02.02.211237
DO - 10.30909/vol.02.02.211237
M3 - Journal article
VL - 2
SP - 211
EP - 237
JO - Volcanica
JF - Volcanica
SN - 2610-3540
IS - 2
ER -