Soluble Material on Ash from Active Central American Volcanoes

Sulfur isotope fractionation during the May 2003 eruption of Anatahan volcano, Mariana Islands: Implications for sulfur sources and plume processes

“…Ash leachate analysis, used to determine concentrations of adsorbed water-soluble components on ash, is an indirect method of determining gas compositions of plinian eruption columns (Taylor and Stoiber, 1973;Rose, 1977). Water soluble sulfate, chloride, and other salts, as well as H 2 SO 4 aerosol droplets, are produced in the column and adsorbed onto ash particles (Rose, 1977;Smith et al, 1982;Hinkley and Smith, 1987).…”

Catahoula Formation of the Texas Coastal Plain: Depositional Systems, Composition, Structural Development, Ground-Water FlowHistory, and Uranium Distribution

“…Even the freshest ash beds in the Catahoula have been exposed to circulating waters, and such flushing can leach large volumes of soluble materials, including metals (Taylor and Stoiber, 1973). In addition, devitrification and argillation are ubiquitous.…”

Fluoride in ash leachates: environmental implications at Popocatépetl volcano, central Mexico

“…This methodology was developed based on the capabilities of our laboratory and the compositional range of leachates. It has been tested against the Taylor and Stoiber (1973) and Varekamp et al (1984) methods as reported in Armienta et al (1998), and fulfils all recommendations given by the International Volcanic Health Hazard Network IVHHN (http://www.ivhhn.org/index.php?option= com content&view=article&id=100). In all cases, duplicate samples were analysed and results accepted when differences were less than 10 %.…”