| Autor: |
Emily Mason, Penny Wieser, Emma Liu, Marie Edmonds, Evgenia Ilyinskaya, Rachel Whitty, Tamsin Mather, Tamar Elias, Patricia Nadeau, Thomas Wilkes, Andrew McGonigle, Tom Pering, Forrest Mims, Christoph Kern, David Schneider, Clive Oppenheimer |
| Rok vydání: |
2020 |
| DOI: |
10.21203/rs.3.rs-53034/v2 |
| Popis: |
Volcanoes represent one of the largest natural sources of metals to Earth’s surface. Emissions of these pollutants and/or nutrients have important implications for the biosphere. We compare gas and particulate chemistry, including metals, of the substantial magmatic (≥200 kt/day SO2) and lava-seawater interaction (laze) plumes from the 2018 eruption of Kīlauea, Hawai’i. The magmatic plume contains abundant volatile chalcophile metals (e.g. Se), whereas the laze is enriched in seawater components (e.g. Cl), yet Cu concentrations are 105 times higher than seawater. High-temperature speciation modelling of magmatic gases at the lava-air interface emphasises chloride’s critical role in metal/metalloid complexation during degassing. In the laze, concentrations of moderately (Cu, Zn, Ag) to highly volatile (Bi, Cd) metals are elevated above seawater. These metals have an affinity for chloride and are derived from late-stage degassing of distal lavas, potentially facilitated by the HCl gas formed as seawater boils. Understanding these processes yields insights into the environmental impacts of volcanism in the present day and geological past. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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