Leaching characteristics of ash from the May 18, 1980, eruption of Mount St. Helens volcano, Washington
Identifieur interne : 003181 ( Istex/Checkpoint ); précédent : 003180; suivant : 003182Leaching characteristics of ash from the May 18, 1980, eruption of Mount St. Helens volcano, Washington
Auteurs : B. Smith [États-Unis] ; A. Zielinski [États-Unis] ; E. Taylor [États-Unis] ; B. Sawyer [États-Unis]Source :
- Bulletin Volcanologique [ 0366-483x ] ; 1983-06-01.
Abstract
Abstract: Leaching of freshly erupted air-fall ash, unaffected by rain, from the May 18, 1980, eruption of Mount St. Helens volcano, Washington, shows that Ca2+, Na+, Mg2+, SO 4 2− , and Cl− are the predominant chemical species released on first exposure of the ash to water. Extremely high correlation of Ca with SO4 and Na with Cl in water leachates suggests the presence of CaSO4 and NaCl salts on the ash. The amount of water soluble material on ash increases with distance from source and with the weight fraction of small (less than 63 micrometers) ash particles of high-surface area. This suggests that surface reactions such as adsorption are responsible for concentrating the soluble material. CaSO4, NaCl, and other salts are probably formed as microscopic crystals in the high-temperature core of the eruption column and are then adsorbed by silicate ash particles. The environmentally important elements Zn, Cu, Cd, F. Pb, and Ba are released by a water leach in concentrations which could pose short-term hazards to some forms of aquatic life. However, calculated concentrations are based on a water-to-ash ratio of 4:1 or less, which is probably an underestimation of the regionally operative ratio. A subsequent leach of ash by warm alkaline solution shows dramatic increases, in the amount of dissolved SiO2, U, and V, which are probably caused by increased dissolution of the glassy component of ash. Glass dissolution by alkaline ground water is a mechanism for providing these three elements to sedimentary traps where they may coaccumulate as uraniferous silica or U-V minerals. Leaching characteristics of ash from Mount St. Helens are comparable to characteristics of ash of similar composition from volcanoes in Guatemala. Ashes from each locality show similar ions predominating for a given leachate and similar fractions of a particular element in the ash removed on contact with the leach solution.
Url:
DOI: 10.1007/BF02597580
Affiliations:
Links toward previous steps (curation, corpus...)
Links to Exploration step
ISTEX:E357D0D48FF6A1E15AB3EFFB404BBD7BD708110BLe document en format XML
<record><TEI wicri:istexFullTextTei="biblStruct"><teiHeader><fileDesc><titleStmt><title xml:lang="en">Leaching characteristics of ash from the May 18, 1980, eruption of Mount St. Helens volcano, Washington</title>
<author><name sortKey="Smith, B" sort="Smith, B" uniqKey="Smith B" first="B." last="Smith">B. Smith</name>
</author>
<author><name sortKey="Zielinski, A" sort="Zielinski, A" uniqKey="Zielinski A" first="A." last="Zielinski">A. Zielinski</name>
</author>
<author><name sortKey="Taylor, E" sort="Taylor, E" uniqKey="Taylor E" first="E." last="Taylor">E. Taylor</name>
</author>
<author><name sortKey="Sawyer, B" sort="Sawyer, B" uniqKey="Sawyer B" first="B." last="Sawyer">B. Sawyer</name>
</author>
</titleStmt>
<publicationStmt><idno type="wicri:source">ISTEX</idno>
<idno type="RBID">ISTEX:E357D0D48FF6A1E15AB3EFFB404BBD7BD708110B</idno>
<date when="1983" year="1983">1983</date>
<idno type="doi">10.1007/BF02597580</idno>
<idno type="url">https://api.istex.fr/document/E357D0D48FF6A1E15AB3EFFB404BBD7BD708110B/fulltext/pdf</idno>
<idno type="wicri:Area/Istex/Corpus">001B45</idno>
<idno type="wicri:Area/Istex/Curation">001A35</idno>
<idno type="wicri:Area/Istex/Checkpoint">003181</idno>
</publicationStmt>
<sourceDesc><biblStruct><analytic><title level="a" type="main" xml:lang="en">Leaching characteristics of ash from the May 18, 1980, eruption of Mount St. Helens volcano, Washington</title>
<author><name sortKey="Smith, B" sort="Smith, B" uniqKey="Smith B" first="B." last="Smith">B. Smith</name>
<affiliation wicri:level="2"><country xml:lang="fr">États-Unis</country>
<placeName><region type="state">Colorado</region>
</placeName>
<wicri:cityArea>Denver Federal Center, U.S. Geological Survey, Mail Stop 973, Box 25046, 80225, Denver</wicri:cityArea>
</affiliation>
</author>
<author><name sortKey="Zielinski, A" sort="Zielinski, A" uniqKey="Zielinski A" first="A." last="Zielinski">A. Zielinski</name>
<affiliation wicri:level="2"><country xml:lang="fr">États-Unis</country>
<placeName><region type="state">Colorado</region>
</placeName>
<wicri:cityArea>Denver Federal Center, U.S. Geological Survey, Mail Stop 424, Box 25046, 80225, Denver</wicri:cityArea>
</affiliation>
</author>
<author><name sortKey="Taylor, E" sort="Taylor, E" uniqKey="Taylor E" first="E." last="Taylor">E. Taylor</name>
<affiliation wicri:level="2"><country xml:lang="fr">États-Unis</country>
<placeName><region type="state">Colorado</region>
</placeName>
<wicri:cityArea>Denver Federal Center, U.S. Geological Survey, Matl Stop 407, Box 25046, 80225, Denver</wicri:cityArea>
</affiliation>
</author>
<author><name sortKey="Sawyer, B" sort="Sawyer, B" uniqKey="Sawyer B" first="B." last="Sawyer">B. Sawyer</name>
<affiliation wicri:level="2"><country xml:lang="fr">États-Unis</country>
<placeName><region type="state">Colorado</region>
</placeName>
<wicri:cityArea>Denver Federal Center, U.S. Bureau of Mines, Mail Stop 5090, Box 25086, 80225, Denver</wicri:cityArea>
</affiliation>
</author>
</analytic>
<monogr></monogr>
<series><title level="j">Bulletin Volcanologique</title>
<title level="j" type="abbrev">Bull Volcanol</title>
<idno type="ISSN">0366-483x</idno>
<idno type="eISSN">1432-0819</idno>
<imprint><publisher>Springer-Verlag</publisher>
<pubPlace>Berlin/Heidelberg</pubPlace>
<date type="published" when="1983-06-01">1983-06-01</date>
<biblScope unit="volume">46</biblScope>
<biblScope unit="issue">2</biblScope>
<biblScope unit="page" from="103">103</biblScope>
<biblScope unit="page" to="124">124</biblScope>
</imprint>
<idno type="ISSN">0366-483x</idno>
</series>
<idno type="istex">E357D0D48FF6A1E15AB3EFFB404BBD7BD708110B</idno>
<idno type="DOI">10.1007/BF02597580</idno>
<idno type="ArticleID">BF02597580</idno>
<idno type="ArticleID">Art2</idno>
</biblStruct>
</sourceDesc>
<seriesStmt><idno type="ISSN">0366-483x</idno>
</seriesStmt>
</fileDesc>
<profileDesc><textClass></textClass>
<langUsage><language ident="en">en</language>
</langUsage>
</profileDesc>
</teiHeader>
<front><div type="abstract" xml:lang="en">Abstract: Leaching of freshly erupted air-fall ash, unaffected by rain, from the May 18, 1980, eruption of Mount St. Helens volcano, Washington, shows that Ca2+, Na+, Mg2+, SO 4 2− , and Cl− are the predominant chemical species released on first exposure of the ash to water. Extremely high correlation of Ca with SO4 and Na with Cl in water leachates suggests the presence of CaSO4 and NaCl salts on the ash. The amount of water soluble material on ash increases with distance from source and with the weight fraction of small (less than 63 micrometers) ash particles of high-surface area. This suggests that surface reactions such as adsorption are responsible for concentrating the soluble material. CaSO4, NaCl, and other salts are probably formed as microscopic crystals in the high-temperature core of the eruption column and are then adsorbed by silicate ash particles. The environmentally important elements Zn, Cu, Cd, F. Pb, and Ba are released by a water leach in concentrations which could pose short-term hazards to some forms of aquatic life. However, calculated concentrations are based on a water-to-ash ratio of 4:1 or less, which is probably an underestimation of the regionally operative ratio. A subsequent leach of ash by warm alkaline solution shows dramatic increases, in the amount of dissolved SiO2, U, and V, which are probably caused by increased dissolution of the glassy component of ash. Glass dissolution by alkaline ground water is a mechanism for providing these three elements to sedimentary traps where they may coaccumulate as uraniferous silica or U-V minerals. Leaching characteristics of ash from Mount St. Helens are comparable to characteristics of ash of similar composition from volcanoes in Guatemala. Ashes from each locality show similar ions predominating for a given leachate and similar fractions of a particular element in the ash removed on contact with the leach solution.</div>
</front>
</TEI>
<affiliations><list><country><li>États-Unis</li>
</country>
<region><li>Colorado</li>
</region>
</list>
<tree><country name="États-Unis"><region name="Colorado"><name sortKey="Smith, B" sort="Smith, B" uniqKey="Smith B" first="B." last="Smith">B. Smith</name>
</region>
<name sortKey="Sawyer, B" sort="Sawyer, B" uniqKey="Sawyer B" first="B." last="Sawyer">B. Sawyer</name>
<name sortKey="Taylor, E" sort="Taylor, E" uniqKey="Taylor E" first="E." last="Taylor">E. Taylor</name>
<name sortKey="Zielinski, A" sort="Zielinski, A" uniqKey="Zielinski A" first="A." last="Zielinski">A. Zielinski</name>
</country>
</tree>
</affiliations>
</record>
Pour manipuler ce document sous Unix (Dilib)
EXPLOR_STEP=$WICRI_ROOT/Ticri/CIDE/explor/OcrV1/Data/Istex/Checkpoint
HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 003181 | SxmlIndent | more
Ou
HfdSelect -h $EXPLOR_AREA/Data/Istex/Checkpoint/biblio.hfd -nk 003181 | SxmlIndent | more
Pour mettre un lien sur cette page dans le réseau Wicri
{{Explor lien |wiki= Ticri/CIDE |area= OcrV1 |flux= Istex |étape= Checkpoint |type= RBID |clé= ISTEX:E357D0D48FF6A1E15AB3EFFB404BBD7BD708110B |texte= Leaching characteristics of ash from the May 18, 1980, eruption of Mount St. Helens volcano, Washington }}
![]() | This area was generated with Dilib version V0.6.32. | ![]() |