latest news: Volcanoes
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Sicily: Accumulation of volcanogenic fluoride by vegetation: Mt. Etna, Sicily
Abstract: Fluoride was measured in samples of lichen and grass collected in 1987 from over 50 sites on the slopes of Mt. Etna. Raised levels of fluoridewere detected on the downwind, eastern side, indicating that the volcano’s plume is the principal source of the fluorides. Lichens proved to be more sensitive than grasses in determining […]Volcanoes
Hawaii: Iridium Enrichment in Airborne Particles from Kilauea Volcano: January 1983.
Abstract: Airborne particulate matter from the January 1983 eruption of Kilauea volcano was inadvertently collected on air filters at Mauna Loa Observatory at a sampling station used to observe particles in global circulation. Analyses of affected samples revealed unusually large concentrations of selenium, arsenic, indium, gold, and sulfur, as expected for volcanic emissions. Strikingly large […]Volcanoes
Hawaii: Incrustations and fumarolic condensates at Kilauea volcano, Hawaii: field, drill-hole and laboratory observations
Abstract: Hawaiian volcanoes characteristically have but few of the many types of minerals found in incrustations of other volcanic areas. In Hawaii sulfates resulting from air oxidation of volatiles predominate, and fluorides produced during rock alteration by fumarolic gases are prominent. Halides are generally found where reducing conditions exist in fumaroles and lava lake drill […]Volcanoes