Two‐cells phase separation in shallow submarine hydrothermal system at Milos Island, Greece: Boron isotopic evidence
Identifieur interne : 000135 ( Istex/Corpus ); précédent : 000134; suivant : 000136Two‐cells phase separation in shallow submarine hydrothermal system at Milos Island, Greece: Boron isotopic evidence
Auteurs : Shein-Fu Wu ; Chen-Feng You ; Bo-Shian Wang ; Eugenia Valsami-Jones ; Emmanuel BaltatzisSource :
- Geophysical Research Letters [ 0094-8276 ] ; 2011-04.
English descriptors
- KwdEn :
- Ambient seawater, Boron, Boron isotope variations, Brine, Brine fluids, Cave fluids, Cave fluids discharge, Cave fluids show, Cave solutions, Cave vents, Chemical characteristics, Chlorinity, Chlorinity fluids, Critical point, Different pathways, Dotsika, Earth planet, Earth sciences, Fluid, Groundwater, Groundwater addition, Groundwater discharge, Hydrothermal, Hydrothermal circulation, Hydrothermal fluids, Hydrothermal systems, Hydrothermal vent fluids, Important role, Initial seawater, Isotope, Magmatic, Magmatic water, Milo, Milos island, Milos system, National university, Natural history museum, Phase separation, Reaction temperature, Reaction temperatures, Rock fissures, Saline fluids, Seawater, Secondary processes, Shallow submarine hydrothermal system, Shallow submarine hydrothermal systems, Subcritical phase separation, Submarine fluids, Submarine hydrothermal system, Vent fluids, Vulcano island.
- Teeft :
- Ambient seawater, Boron, Boron isotope variations, Brine, Brine fluids, Cave fluids, Cave fluids discharge, Cave fluids show, Cave solutions, Cave vents, Chemical characteristics, Chlorinity, Chlorinity fluids, Critical point, Different pathways, Dotsika, Earth planet, Earth sciences, Fluid, Groundwater, Groundwater addition, Groundwater discharge, Hydrothermal, Hydrothermal circulation, Hydrothermal fluids, Hydrothermal systems, Hydrothermal vent fluids, Important role, Initial seawater, Isotope, Magmatic, Magmatic water, Milo, Milos island, Milos system, National university, Natural history museum, Phase separation, Reaction temperature, Reaction temperatures, Rock fissures, Saline fluids, Seawater, Secondary processes, Shallow submarine hydrothermal system, Shallow submarine hydrothermal systems, Subcritical phase separation, Submarine fluids, Submarine hydrothermal system, Vent fluids, Vulcano island.
Abstract
Three types of hydrothermal vent fluids, herein referred to as cave, submarine‐brine and seawater‐like, were recovered from a shallow submerged system at Milos in the Aegean Sea, Greece, for detailed chemical and isotopic analyses. The cave fluids discharge through rock fissures near sea‐level and have low pH, chlorinity, and B concentrations relative to seawater. The submarine‐brine fluids are characterized by high Cl and contain >10 times seawater B concentrations. A scenario involving a two‐cells circulation is proposed; one occurs at 1–2 km and another at shallower depth. The deeper saline reservoir has experienced subcritical phase separation, partitioning 0.42 mM B in vapor and 6.8 mM in brine with no detectable isotopic fractionation. The reaction temperature in the saline reservoir is 313°C calculated from the Na‐K‐Ca geothermometry. The vapors rise directly to form the cave vents, whereas the saline fluids transport in different pathways and are influenced by seawater mixing to form the variable submarine‐brine fluids. The seawater‐like fluids circulate at shallower depths, where calculated temperature is 248°C and show slightly diluted B (0.36–0.41 mM) and seawater δ11B. These fluids probably resulted from heating of down‐flow seawater and may have experienced groundwater discharge and partial Mg removal. This study represents the first two‐cells circulation occurring at Milos and emphasizes the important role of phase separation in shallow submarine hydrothermal system.
Deep saline reservoir occurs at 1–2 km and another at shallow depth Phase separation has occurred at deep reservoir to form low chlorinity fluids Shallow reservoir has experienced slight fresh dilution and partial Mg removal
Url:
DOI: 10.1029/2011GL047409
Links to Exploration step
ISTEX:6AB6EF52CD08656D19C885C39BE2AFEE9502715DLe document en format XML
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last="Wu">Shein-Fu Wu</name><affiliation><mods:affiliation>Department of Earth Sciences, National Cheng‐Kung University, Tainan, Taiwan</mods:affiliation></affiliation><affiliation><mods:affiliation>Also at Earth Dynamic System Research Center, National Cheng‐Kung University, Tainan, Taiwan.</mods:affiliation></affiliation></author><author><name sortKey="You, Chen Eng" sort="You, Chen Eng" uniqKey="You C" first="Chen-Feng" last="You">Chen-Feng You</name><affiliation><mods:affiliation>Department of Earth Sciences, National Cheng‐Kung University, Tainan, Taiwan</mods:affiliation></affiliation><affiliation><mods:affiliation>Also at Earth Dynamic System Research Center, National Cheng‐Kung University, Tainan, Taiwan.</mods:affiliation></affiliation><affiliation><mods:affiliation>E-mail: cfy20@mail.ncku.edu.tw</mods:affiliation></affiliation></author><author><name sortKey="Wang, Bo Hian" sort="Wang, Bo Hian" uniqKey="Wang B" first="Bo-Shian" last="Wang">Bo-Shian 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type="main">Geophysical Research Letters</title><title level="j" type="alt">GEOPHYSICAL RESEARCH LETTERS</title><idno type="ISSN">0094-8276</idno><idno type="eISSN">1944-8007</idno><imprint><biblScope unit="vol">38</biblScope><biblScope unit="issue">8</biblScope><biblScope unit="page-count">5</biblScope><date type="published" when="2011-04">2011-04</date></imprint><idno type="ISSN">0094-8276</idno></series></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0094-8276</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Ambient seawater</term><term>Boron</term><term>Boron isotope variations</term><term>Brine</term><term>Brine fluids</term><term>Cave fluids</term><term>Cave fluids discharge</term><term>Cave fluids show</term><term>Cave solutions</term><term>Cave vents</term><term>Chemical characteristics</term><term>Chlorinity</term><term>Chlorinity fluids</term><term>Critical point</term><term>Different 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seawater</term><term>Isotope</term><term>Magmatic</term><term>Magmatic water</term><term>Milo</term><term>Milos island</term><term>Milos system</term><term>National university</term><term>Natural history museum</term><term>Phase separation</term><term>Reaction temperature</term><term>Reaction temperatures</term><term>Rock fissures</term><term>Saline fluids</term><term>Seawater</term><term>Secondary processes</term><term>Shallow submarine hydrothermal system</term><term>Shallow submarine hydrothermal systems</term><term>Subcritical phase separation</term><term>Submarine fluids</term><term>Submarine hydrothermal system</term><term>Vent fluids</term><term>Vulcano island</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract">Three types of hydrothermal vent fluids, herein referred to as cave, submarine‐brine and seawater‐like, were recovered from a shallow submerged system at Milos in the Aegean Sea, Greece, for detailed chemical and isotopic analyses. The cave fluids discharge through rock fissures near sea‐level and have low pH, chlorinity, and B concentrations relative to seawater. The submarine‐brine fluids are characterized by high Cl and contain >10 times seawater B concentrations. A scenario involving a two‐cells circulation is proposed; one occurs at 1–2 km and another at shallower depth. The deeper saline reservoir has experienced subcritical phase separation, partitioning 0.42 mM B in vapor and 6.8 mM in brine with no detectable isotopic fractionation. The reaction temperature in the saline reservoir is 313°C calculated from the Na‐K‐Ca geothermometry. The vapors rise directly to form the cave vents, whereas the saline fluids transport in different pathways and are influenced by seawater mixing to form the variable submarine‐brine fluids. The seawater‐like fluids circulate at shallower depths, where calculated temperature is 248°C and show slightly diluted B (0.36–0.41 mM) and seawater δ11B. These fluids probably resulted from heating of down‐flow seawater and may have experienced groundwater discharge and partial Mg removal. This study represents the first two‐cells circulation occurring at Milos and emphasizes the important role of phase separation in shallow submarine hydrothermal system.</div><div type="abstract">Deep saline reservoir occurs at 1–2 km and another at shallow depth Phase separation has occurred at deep reservoir to form low chlorinity fluids Shallow reservoir has experienced slight fresh dilution and partial Mg removal</div></front></TEI><istex><corpusName>wiley</corpusName><keywords><teeft><json:string>hydrothermal</json:string><json:string>seawater</json:string><json:string>milo</json:string><json:string>brine</json:string><json:string>phase separation</json:string><json:string>groundwater</json:string><json:string>cave fluids</json:string><json:string>magmatic</json:string><json:string>boron</json:string><json:string>isotope</json:string><json:string>milos island</json:string><json:string>chlorinity</json:string><json:string>brine 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systems</value></json:item><json:item><value>Marine inorganic chemistry</value></json:item><json:item><value>Nutrients and nutrient cycling</value></json:item><json:item><value>Marine organic chemistry</value></json:item><json:item><value>TECTONOPHYSICS</value></json:item><json:item><value>Hydrothermal systems</value></json:item><json:item><value>VOLCANOLOGY</value></json:item><json:item><value>Hydrothermal systems</value></json:item><json:item><value>Reactions and phase equilibria</value></json:item><json:item><value>Oceans</value></json:item></subject></host><categories><wos><json:string>science</json:string><json:string>geosciences, multidisciplinary</json:string></wos><scienceMetrix><json:string>natural sciences</json:string><json:string>earth & environmental sciences</json:string><json:string>meteorology & atmospheric 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evidence</title></titleStmt><publicationStmt><publisher>Blackwell Publishing Ltd</publisher><availability><licence>Copyright 2011 by the American Geophysical Union.</licence></availability><date type="published" when="2011-04"></date></publicationStmt><notesStmt><note type="content-type" subtype="article" source="article" scheme="https://content-type.data.istex.fr/ark:/67375/XTP-6N5SZHKN-D">article</note><note type="publication-type" subtype="journal" scheme="https://publication-type.data.istex.fr/ark:/67375/JMC-0GLKJH51-B">journal</note></notesStmt><sourceDesc><biblStruct type="article"><analytic><title level="a" type="main">Two‐cells phase separation in shallow submarine hydrothermal system at Milos Island, Greece: Boron isotopic evidence</title><title level="a" type="short">HYDROTHERMAL CIRCULATION IN MILOS SYSTEM</title><author xml:id="author-0000"><persName><forename type="first">Shein‐Fu</forename><surname>Wu</surname></persName><affiliation><orgName>Department of Earth Sciences</orgName><orgName>National Cheng‐Kung University</orgName><address><settlement type="city">Tainan</settlement><country key="TW">Taiwan</country></address></affiliation><affiliation>Also at Earth Dynamic System Research Center, National Cheng‐Kung University, Tainan, Taiwan.</affiliation></author><author xml:id="author-0001"><persName><forename type="first">Chen‐Feng</forename><surname>You</surname></persName><email>cfy20@mail.ncku.edu.tw</email><affiliation><orgName>Department of Earth Sciences</orgName><orgName>National Cheng‐Kung University</orgName><address><settlement type="city">Tainan</settlement><country key="TW">Taiwan</country></address></affiliation><affiliation>Also at Earth Dynamic System Research Center, National Cheng‐Kung University, Tainan, Taiwan.</affiliation></author><author xml:id="author-0002"><persName><forename type="first">Bo‐Shian</forename><surname>Wang</surname></persName><affiliation><orgName>Department of Earth Sciences</orgName><orgName>National Cheng‐Kung University</orgName><address><settlement type="city">Tainan</settlement><country key="TW">Taiwan</country></address></affiliation><affiliation>Also at Earth Dynamic System Research Center, National Cheng‐Kung University, Tainan, Taiwan.</affiliation></author><author xml:id="author-0003"><persName><forename type="first">Eugenia</forename><surname>Valsami‐Jones</surname></persName><affiliation><orgName>Department of Mineralogy</orgName><orgName>Natural History Museum</orgName><address><settlement type="city">London</settlement><country key="GB">UK</country></address></affiliation></author><author xml:id="author-0004"><persName><forename type="first">Emmanuel</forename><surname>Baltatzis</surname></persName><affiliation><orgName>Department of Mineralogy and Petrology</orgName><orgName>National University of Athens</orgName><address><settlement type="city">Athens</settlement><country key="GR">Greece</country></address></affiliation></author><idno type="istex">6AB6EF52CD08656D19C885C39BE2AFEE9502715D</idno><idno type="DOI">10.1029/2011GL047409</idno><idno type="editorialOffice">2011GL047409</idno><idno type="society">L08613</idno><idno type="unit">GRL28076</idno><idno type="toTypesetVersion">file:GRL.GRL28076.pdf</idno></analytic><monogr><title level="j" type="main">Geophysical Research Letters</title><title level="j" type="alt">GEOPHYSICAL RESEARCH LETTERS</title><idno type="pISSN">0094-8276</idno><idno type="eISSN">1944-8007</idno><idno type="book-DOI">10.1002/(ISSN)1944-8007</idno><idno type="book-part-DOI">10.1002/grl.v38.8</idno><idno type="product">GRL</idno><idno type="coden">GPRLAJ</idno><imprint><biblScope unit="vol">38</biblScope><biblScope unit="issue">8</biblScope><biblScope unit="page-count">5</biblScope><date type="published" when="2011-04"></date></imprint></monogr></biblStruct></sourceDesc></fileDesc><profileDesc><abstract style="main"><p xml:id="grl28076-para-0004">Three types of hydrothermal vent fluids, herein referred to as cave, submarine‐brine and seawater‐like, were recovered from a shallow submerged system at Milos in the Aegean Sea, Greece, for detailed chemical and isotopic analyses. The cave fluids discharge through rock fissures near sea‐level and have low pH, chlorinity, and B concentrations relative to seawater. The submarine‐brine fluids are characterized by high Cl and contain >10 times seawater B concentrations. A scenario involving a two‐cells circulation is proposed; one occurs at 1–2 km and another at shallower depth. The deeper saline reservoir has experienced subcritical phase separation, partitioning 0.42 mM B in vapor and 6.8 mM in brine with no detectable isotopic fractionation. The reaction temperature in the saline reservoir is 313°C calculated from the Na‐K‐Ca geothermometry. The vapors rise directly to form the cave vents, whereas the saline fluids transport in different pathways and are influenced by seawater mixing to form the variable submarine‐brine fluids. The seawater‐like fluids circulate at shallower depths, where calculated temperature is 248°C and show slightly diluted B (0.36–0.41 mM) and seawater <hi rend="italic">δ</hi><hi rend="superscript">11</hi>B. These fluids probably resulted from heating of down‐flow seawater and may have experienced groundwater discharge and partial Mg removal. This study represents the first two‐cells circulation occurring at Milos and emphasizes the important role of phase separation in shallow submarine hydrothermal system.</p></abstract><abstract style="short"><head>Key Points</head><p xml:id="grl28076-para-0005"><list style="bulleted"><item>Deep saline reservoir occurs at 1–2 km and another at shallow depth</item><item>Phase separation has occurred at deep reservoir to form low chlorinity fluids</item><item>Shallow reservoir has experienced slight fresh dilution and partial Mg removal</item></list></p></abstract><textClass><keywords><term xml:id="grl28076-kwd-0001">hydrothermal</term><term xml:id="grl28076-kwd-0002">phase separation</term><term xml:id="grl28076-kwd-0003">boron isotope</term><term xml:id="grl28076-kwd-0004">Milos</term></keywords><classCode scheme="http://psi.agu.org/taxonomy5/0300">ATMOSPHERIC COMPOSITION AND STRUCTURE</classCode><classCode scheme="http://psi.agu.org/taxonomy5/0400">BIOGEOSCIENCES</classCode><classCode scheme="http://psi.agu.org/taxonomy5/1000">GEOCHEMISTRY</classCode><classCode scheme="http://psi.agu.org/taxonomy5/3000">MARINE GEOLOGY AND GEOPHYSICS</classCode><classCode scheme="http://psi.agu.org/taxonomy5/3600">MINERALOGY AND PETROLOGY</classCode><classCode scheme="http://psi.agu.org/taxonomy5/4800">OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL</classCode><classCode scheme="http://psi.agu.org/taxonomy5/8100">TECTONOPHYSICS</classCode><classCode scheme="http://psi.agu.org/taxonomy5/8400">VOLCANOLOGY</classCode><classCode scheme="articleCategory">Oceans</classCode><classCode scheme="tocHeading1">Oceans</classCode></textClass><langUsage><language ident="EN"></language></langUsage></profileDesc></teiHeader></istex:fulltextTEI><json:item><extension>txt</extension><original>false</original><mimetype>text/plain</mimetype><uri>https://api.istex.fr/document/6AB6EF52CD08656D19C885C39BE2AFEE9502715D/fulltext/txt</uri></json:item></fulltext><metadata><istex:metadataXml wicri:clean="Wiley, elements deleted: body"><istex:xmlDeclaration>version="1.0" encoding="UTF-8" standalone="yes"</istex:xmlDeclaration><istex:document><component type="serialArticle" version="2.0" xml:lang="en" xml:id="grl28076"><header><publicationMeta level="product"><doi>10.1002/(ISSN)1944-8007</doi><issn type="print">0094-8276</issn><issn type="electronic">1944-8007</issn><idGroup><id type="product" value="GRL"></id><id type="coden" value="GPRLAJ"></id></idGroup><titleGroup><title type="main" xml:lang="en" sort="GEOPHYSICAL RESEARCH LETTERS">Geophysical Research Letters</title><title type="short">Geophys. 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Lett.</title></titleGroup></publicationMeta><publicationMeta level="part" position="80"><doi>10.1002/grl.v38.8</doi><numberingGroup><numbering type="journalVolume" number="38">38</numbering><numbering type="journalIssue">8</numbering></numberingGroup><coverDate startDate="2011-04">April 2011</coverDate></publicationMeta><publicationMeta level="unit" position="260" type="article" status="forIssue"><doi>10.1029/2011GL047409</doi><idGroup><id type="editorialOffice" value="2011GL047409"></id><id type="society" value="L08613"></id><id type="unit" value="GRL28076"></id></idGroup><countGroup><count type="pageTotal" number="5"></count></countGroup><titleGroup><title type="articleCategory">Oceans</title><title type="tocHeading1">Oceans</title></titleGroup><copyright ownership="thirdParty">Copyright 2011 by the American Geophysical Union.</copyright><eventGroup><event type="manuscriptReceived" date="2011-03-08"></event><event type="manuscriptAccepted" date="2011-03-10"></event><event type="firstOnline" date="2011-04-29"></event><event type="publishedOnlineFinalForm" date="2011-04-29"></event><event type="xmlConverted" agent="SPi Global Converter:AGUv3.44_TO_WileyML3Gv1.0.3 version:1.3; WileyML 3G Packaging Tool v1.0; AGU2WileyML3G Final Clean Up v1.0" date="2012-12-18"></event><event type="xmlConverted" agent="Converter:WILEY_ML3G_TO_WILEY_ML3GV2 version:3.8.8" date="2014-01-26"></event><event type="xmlConverted" agent="Converter:WML3G_To_WML3G version:4.1.7 mode:FullText,remove_FC" date="2014-10-24"></event></eventGroup><numberingGroup><numbering type="pageFirst">n/a</numbering><numbering type="pageLast">n/a</numbering></numberingGroup><subjectInfo><subject role="crossTerm" href="http://psi.agu.org/taxonomy5/0300">ATMOSPHERIC COMPOSITION AND STRUCTURE</subject><subjectInfo><subject role="crossTerm" href="http://psi.agu.org/taxonomy5/0330">Geochemical cycles</subject></subjectInfo><subject role="crossTerm" href="http://psi.agu.org/taxonomy5/0400">BIOGEOSCIENCES</subject><subjectInfo><subject role="crossTerm" href="http://psi.agu.org/taxonomy5/0450">Hydrothermal systems</subject></subjectInfo><subject href="http://psi.agu.org/taxonomy5/1000">GEOCHEMISTRY</subject><subjectInfo><subject href="http://psi.agu.org/taxonomy5/1034">Hydrothermal systems</subject><subject href="http://psi.agu.org/taxonomy5/1030">Geochemical cycles</subject><subject href="http://psi.agu.org/taxonomy5/1065">Major and trace element geochemistry</subject><subject href="http://psi.agu.org/taxonomy5/1050">Marine geochemistry</subject><subject href="http://psi.agu.org/taxonomy5/1012">Reactions and phase equilibria</subject></subjectInfo><subject role="crossTerm" href="http://psi.agu.org/taxonomy5/3000">MARINE GEOLOGY AND GEOPHYSICS</subject><subjectInfo><subject role="crossTerm" href="http://psi.agu.org/taxonomy5/3017">Hydrothermal systems</subject></subjectInfo><subject role="crossTerm" href="http://psi.agu.org/taxonomy5/3600">MINERALOGY AND PETROLOGY</subject><subjectInfo><subject role="crossTerm" href="http://psi.agu.org/taxonomy5/3616">Hydrothermal systems</subject><subject role="crossTerm" href="http://psi.agu.org/taxonomy5/3612">Reactions and phase equilibria</subject></subjectInfo><subject role="crossTerm" href="http://psi.agu.org/taxonomy5/4800">OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL</subject><subjectInfo><subject role="crossTerm" href="http://psi.agu.org/taxonomy5/4832">Hydrothermal systems</subject><subject role="crossTerm" href="http://psi.agu.org/taxonomy5/4835">Marine inorganic chemistry</subject><subject role="crossTerm" href="http://psi.agu.org/taxonomy5/4845">Nutrients and nutrient cycling</subject><subject role="crossTerm" href="http://psi.agu.org/taxonomy5/4850">Marine organic chemistry</subject></subjectInfo><subject href="http://psi.agu.org/taxonomy5/8100">TECTONOPHYSICS</subject><subjectInfo><subject role="crossTerm" href="http://psi.agu.org/taxonomy5/8135">Hydrothermal systems</subject></subjectInfo><subject role="crossTerm" href="http://psi.agu.org/taxonomy5/8400">VOLCANOLOGY</subject><subjectInfo><subject role="crossTerm" href="http://psi.agu.org/taxonomy5/8424">Hydrothermal systems</subject><subject role="crossTerm" href="http://psi.agu.org/taxonomy5/8412">Reactions and phase equilibria</subject></subjectInfo></subjectInfo><selfCitationGroup><citation xml:id="grl28076-cit-0000" type="self"><author><familyName>Wu</familyName>, <givenNames>S.‐F.</givenNames></author>, <author><givenNames>C.‐F.</givenNames> <familyName>You</familyName></author>, <author><givenNames>B.‐S.</givenNames> <familyName>Wang</familyName></author>, <author><givenNames>E.</givenNames> <familyName>Valsami‐Jones</familyName></author>, and <author><givenNames>E.</givenNames> <familyName>Baltatzis</familyName></author> (<pubYear year="2011">2011</pubYear>), <articleTitle>Two‐cells phase separation in shallow submarine hydrothermal system at Milos Island, Greece: Boron isotopic evidence</articleTitle>, <journalTitle>Geophys. Res. Lett.</journalTitle>, <vol>38</vol>, L08613, doi:<accessionId ref="info:doi/10.1029/2011GL047409">10.1029/2011GL047409</accessionId>.</citation></selfCitationGroup><linkGroup><link type="toTypesetVersion" href="file:GRL.GRL28076.pdf"></link></linkGroup></publicationMeta><contentMeta><countGroup><count type="wordTotal" number="3800"></count><count type="figureTotal" number="2"></count></countGroup><titleGroup><title type="main">Two‐cells phase separation in shallow submarine hydrothermal system at Milos Island, Greece: Boron isotopic evidence</title><title type="short">HYDROTHERMAL CIRCULATION IN MILOS SYSTEM</title><title type="shortAuthors">Wu <i>et al</i>.</title></titleGroup><creators><creator creatorRole="author" xml:id="grl28076-cr-0001" affiliationRef="#grl28076-aff-0001 #grl28076-aff-0004"><personName><givenNames>Shein‐Fu</givenNames> <familyName>Wu</familyName></personName></creator><creator creatorRole="author" xml:id="grl28076-cr-0002" affiliationRef="#grl28076-aff-0001 #grl28076-aff-0004"><personName><givenNames>Chen‐Feng</givenNames> <familyName>You</familyName></personName><contactDetails><email normalForm="cfy20@mail.ncku.edu.tw">cfy20@mail.ncku.edu.tw</email></contactDetails></creator><creator creatorRole="author" xml:id="grl28076-cr-0003" affiliationRef="#grl28076-aff-0001 #grl28076-aff-0004"><personName><givenNames>Bo‐Shian</givenNames> <familyName>Wang</familyName></personName></creator><creator creatorRole="author" xml:id="grl28076-cr-0004" affiliationRef="#grl28076-aff-0002"><personName><givenNames>Eugenia</givenNames> <familyName>Valsami‐Jones</familyName></personName></creator><creator creatorRole="author" xml:id="grl28076-cr-0005" affiliationRef="#grl28076-aff-0003"><personName><givenNames>Emmanuel</givenNames> <familyName>Baltatzis</familyName></personName></creator></creators><affiliationGroup><affiliation countryCode="TW" type="organization" xml:id="grl28076-aff-0001"><orgDiv>Department of Earth Sciences</orgDiv><orgName>National Cheng‐Kung University</orgName><address><city>Tainan</city><country>Taiwan</country></address></affiliation><affiliation countryCode="GB" type="organization" xml:id="grl28076-aff-0002"><orgDiv>Department of Mineralogy</orgDiv><orgName>Natural History Museum</orgName><address><city>London</city><country>UK</country></address></affiliation><affiliation countryCode="GR" type="organization" xml:id="grl28076-aff-0003"><orgDiv>Department of Mineralogy and Petrology</orgDiv><orgName>National University of Athens</orgName><address><city>Athens</city><country>Greece</country></address></affiliation><affiliation type="organization" xml:id="grl28076-aff-0004"><unparsedAffiliation>Also at Earth Dynamic System Research Center, National Cheng‐Kung University, Tainan, Taiwan.</unparsedAffiliation></affiliation></affiliationGroup><keywordGroup type="author"><keyword xml:id="grl28076-kwd-0001">hydrothermal</keyword><keyword xml:id="grl28076-kwd-0002">phase separation</keyword><keyword xml:id="grl28076-kwd-0003">boron isotope</keyword><keyword xml:id="grl28076-kwd-0004">Milos</keyword></keywordGroup><supportingInformation xml:id="grl28076-sup-0000"><p xml:id="grl28076-para-0001">Auxiliary material for this article contains a text file, two tables, and two figures.</p><p xml:id="grl28076-para-0002">Auxiliary material files may require downloading to a local drive depending on platform, browser, configuration, and size. To open auxiliary materials in a browser, click on the label. To download, Right‐click and select “Save Target As…” (PC) or CTRL‐click and select “Download Link to Disk” (Mac).</p><p xml:id="grl28076-para-0003">Additional file information is provided in the readme.txt.</p><supportingInfoItem><mediaResource alt="supplementary data" mimeType="text/plain" href="urn-x:wiley:00948276:media:grl28076:grl28076-sup-0001-readme"></mediaResource><caption>readme.txt</caption></supportingInfoItem><supportingInfoItem><mediaResource alt="supplementary data" mimeType="application/pdf" href="urn-x:wiley:00948276:media:grl28076:grl28076-sup-0002-txts01"></mediaResource><caption>Text S1. Geological setting and sample descriptions in the study area.</caption></supportingInfoItem><supportingInfoItem><mediaResource alt="supplementary data" mimeType="application/pdf" href="urn-x:wiley:00948276:media:grl28076:grl28076-sup-0003-ts01"></mediaResource><caption>Table S1. The isotopic B composition, concentrations of B and major elements, as well as the pH and temperature measured in the hydrothermal fluids and local seawater.</caption></supportingInfoItem><supportingInfoItem><mediaResource alt="supplementary data" mimeType="application/pdf" href="urn-x:wiley:00948276:media:grl28076:grl28076-sup-0004-ts02"></mediaResource><caption>Table S2. All calculated end‐member chemical components and reaction temperatures of three types of fluids, and chemical compositions of well fluids measured from previous works.</caption></supportingInfoItem><supportingInfoItem><mediaResource alt="supplementary data" rendition="webOriginal" mimeType="image/tiff" href="urn-x:wiley:00948276:media:grl28076:grl28076-sup-0005-fs01"></mediaResource><caption>Figure S1. The plots of dissolved Mg and Na, K, Ca, and SO<sub>4</sub> in all vent fluids.</caption></supportingInfoItem></supportingInformation><abstractGroup><abstract type="main"><p xml:id="grl28076-para-0004" label="1">Three types of hydrothermal vent fluids, herein referred to as cave, submarine‐brine and seawater‐like, were recovered from a shallow submerged system at Milos in the Aegean Sea, Greece, for detailed chemical and isotopic analyses. The cave fluids discharge through rock fissures near sea‐level and have low pH, chlorinity, and B concentrations relative to seawater. The submarine‐brine fluids are characterized by high Cl and contain >10 times seawater B concentrations. A scenario involving a two‐cells circulation is proposed; one occurs at 1–2 km and another at shallower depth. The deeper saline reservoir has experienced subcritical phase separation, partitioning 0.42 mM B in vapor and 6.8 mM in brine with no detectable isotopic fractionation. The reaction temperature in the saline reservoir is 313°C calculated from the Na‐K‐Ca geothermometry. The vapors rise directly to form the cave vents, whereas the saline fluids transport in different pathways and are influenced by seawater mixing to form the variable submarine‐brine fluids. The seawater‐like fluids circulate at shallower depths, where calculated temperature is 248°C and show slightly diluted B (0.36–0.41 mM) and seawater <i>δ</i><sup>11</sup>B. These fluids probably resulted from heating of down‐flow seawater and may have experienced groundwater discharge and partial Mg removal. This study represents the first two‐cells circulation occurring at Milos and emphasizes the important role of phase separation in shallow submarine hydrothermal system.</p></abstract><abstract type="short"><title type="main">Key Points</title><p xml:id="grl28076-para-0005"><list style="bulleted"><listItem>Deep saline reservoir occurs at 1–2 km and another at shallow depth</listItem><listItem>Phase separation has occurred at deep reservoir to form low chlorinity fluids</listItem><listItem>Shallow reservoir has experienced slight fresh dilution and partial Mg removal</listItem></list></p></abstract></abstractGroup></contentMeta></header></component></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>Two‐cells phase separation in shallow submarine hydrothermal system at Milos Island, Greece: Boron isotopic evidence</title></titleInfo><titleInfo type="abbreviated" lang="en"><title>HYDROTHERMAL CIRCULATION IN MILOS SYSTEM</title></titleInfo><titleInfo type="alternative" contentType="CDATA" lang="en"><title>Two‐cells phase separation in shallow submarine hydrothermal system at Milos Island, Greece: Boron isotopic evidence</title></titleInfo><name type="personal"><namePart type="given">Shein‐Fu</namePart><namePart type="family">Wu</namePart><affiliation>Department of Earth Sciences, National Cheng‐Kung University, Tainan, Taiwan</affiliation><affiliation>Also at Earth Dynamic System Research Center, National Cheng‐Kung University, Tainan, Taiwan.</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Chen‐Feng</namePart><namePart type="family">You</namePart><affiliation>Department of Earth Sciences, National Cheng‐Kung University, Tainan, Taiwan</affiliation><affiliation>Also at Earth Dynamic System Research Center, National Cheng‐Kung University, Tainan, Taiwan.</affiliation><affiliation>E-mail: cfy20@mail.ncku.edu.tw</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Bo‐Shian</namePart><namePart type="family">Wang</namePart><affiliation>Department of Earth Sciences, National Cheng‐Kung University, Tainan, Taiwan</affiliation><affiliation>Also at Earth Dynamic System Research Center, National Cheng‐Kung University, Tainan, Taiwan.</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Eugenia</namePart><namePart type="family">Valsami‐Jones</namePart><affiliation>Department of Mineralogy, Natural History Museum, London, UK</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Emmanuel</namePart><namePart type="family">Baltatzis</namePart><affiliation>Department of Mineralogy and Petrology, National University of Athens, Athens, Greece</affiliation><role><roleTerm type="text">author</roleTerm></role></name><typeOfResource>text</typeOfResource><genre type="article" displayLabel="article"></genre><originInfo><publisher>Blackwell Publishing Ltd</publisher><dateIssued encoding="w3cdtf">2011-04</dateIssued><dateCaptured encoding="w3cdtf">2011-03-08</dateCaptured><dateValid encoding="w3cdtf">2011-03-10</dateValid><edition>Wu, S.‐F., C.‐F. You, B.‐S. Wang, E. Valsami‐Jones, and E. Baltatzis (2011), Two‐cells phase separation in shallow submarine hydrothermal system at Milos Island, Greece: Boron isotopic evidence, Geophys. Res. Lett., 38, L08613, doi:10.1029/2011GL047409.</edition><copyrightDate encoding="w3cdtf">2011</copyrightDate></originInfo><language><languageTerm type="code" authority="rfc3066">en</languageTerm><languageTerm type="code" authority="iso639-2b">eng</languageTerm></language><physicalDescription><internetMediaType>text/html</internetMediaType><extent unit="figures">2</extent><extent unit="words">3800</extent></physicalDescription><abstract>Three types of hydrothermal vent fluids, herein referred to as cave, submarine‐brine and seawater‐like, were recovered from a shallow submerged system at Milos in the Aegean Sea, Greece, for detailed chemical and isotopic analyses. The cave fluids discharge through rock fissures near sea‐level and have low pH, chlorinity, and B concentrations relative to seawater. The submarine‐brine fluids are characterized by high Cl and contain >10 times seawater B concentrations. A scenario involving a two‐cells circulation is proposed; one occurs at 1–2 km and another at shallower depth. The deeper saline reservoir has experienced subcritical phase separation, partitioning 0.42 mM B in vapor and 6.8 mM in brine with no detectable isotopic fractionation. The reaction temperature in the saline reservoir is 313°C calculated from the Na‐K‐Ca geothermometry. The vapors rise directly to form the cave vents, whereas the saline fluids transport in different pathways and are influenced by seawater mixing to form the variable submarine‐brine fluids. The seawater‐like fluids circulate at shallower depths, where calculated temperature is 248°C and show slightly diluted B (0.36–0.41 mM) and seawater δ11B. These fluids probably resulted from heating of down‐flow seawater and may have experienced groundwater discharge and partial Mg removal. This study represents the first two‐cells circulation occurring at Milos and emphasizes the important role of phase separation in shallow submarine hydrothermal system.</abstract><abstract type="short">Deep saline reservoir occurs at 1–2 km and another at shallow depth Phase separation has occurred at deep reservoir to form low chlorinity fluids Shallow reservoir has experienced slight fresh dilution and partial Mg removal</abstract><subject><genre>keywords</genre><topic>hydrothermal</topic><topic>phase separation</topic><topic>boron isotope</topic><topic>Milos</topic></subject><relatedItem type="host"><titleInfo><title>Geophysical Research Letters</title></titleInfo><titleInfo type="abbreviated"><title>Geophys. Res. Lett.</title></titleInfo><genre type="journal">journal</genre><note type="content"> Auxiliary material for this article contains a text file, two tables, and two figures. Auxiliary material files may require downloading to a local drive depending on platform, browser, configuration, and size. To open auxiliary materials in a browser, click on the label. To download, Right‐click and select “Save Target As…” (PC) or CTRL‐click and select “Download Link to Disk” (Mac). Additional file information is provided in the readme.txt. Auxiliary material for this article contains a text file, two tables, and two figures. Auxiliary material files may require downloading to a local drive depending on platform, browser, configuration, and size. To open auxiliary materials in a browser, click on the label. To download, Right‐click and select “Save Target As…” (PC) or CTRL‐click and select “Download Link to Disk” (Mac). Additional file information is provided in the readme.txt. Auxiliary material for this article contains a text file, two tables, and two figures. Auxiliary material files may require downloading to a local drive depending on platform, browser, configuration, and size. To open auxiliary materials in a browser, click on the label. To download, Right‐click and select “Save Target As…” (PC) or CTRL‐click and select “Download Link to Disk” (Mac). Additional file information is provided in the readme.txt.Supporting Info Item: readme.txt - Text S1. Geological setting and sample descriptions in the study area. - Table S1. The isotopic B composition, concentrations of B and major elements, as well as the pH and temperature measured in the hydrothermal fluids and local seawater. - Table S2. All calculated end‐member chemical components and reaction temperatures of three types of fluids, and chemical compositions of well fluids measured from previous works. - Figure S1. The plots of dissolved Mg and Na, K, Ca, and SO4 in all vent fluids. - </note><subject><genre>index-terms</genre><topic authorityURI="http://psi.agu.org/taxonomy5/0300">ATMOSPHERIC COMPOSITION AND STRUCTURE</topic><topic authorityURI="http://psi.agu.org/taxonomy5/0330">Geochemical cycles</topic><topic authorityURI="http://psi.agu.org/taxonomy5/0400">BIOGEOSCIENCES</topic><topic authorityURI="http://psi.agu.org/taxonomy5/0450">Hydrothermal systems</topic><topic authorityURI="http://psi.agu.org/taxonomy5/1000">GEOCHEMISTRY</topic><topic authorityURI="http://psi.agu.org/taxonomy5/1034">Hydrothermal systems</topic><topic authorityURI="http://psi.agu.org/taxonomy5/1030">Geochemical cycles</topic><topic authorityURI="http://psi.agu.org/taxonomy5/1065">Major and trace element geochemistry</topic><topic authorityURI="http://psi.agu.org/taxonomy5/1050">Marine geochemistry</topic><topic authorityURI="http://psi.agu.org/taxonomy5/1012">Reactions and phase equilibria</topic><topic authorityURI="http://psi.agu.org/taxonomy5/3000">MARINE GEOLOGY AND GEOPHYSICS</topic><topic authorityURI="http://psi.agu.org/taxonomy5/3017">Hydrothermal systems</topic><topic authorityURI="http://psi.agu.org/taxonomy5/3600">MINERALOGY AND PETROLOGY</topic><topic authorityURI="http://psi.agu.org/taxonomy5/3616">Hydrothermal systems</topic><topic authorityURI="http://psi.agu.org/taxonomy5/3612">Reactions and phase equilibria</topic><topic authorityURI="http://psi.agu.org/taxonomy5/4800">OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL</topic><topic authorityURI="http://psi.agu.org/taxonomy5/4832">Hydrothermal systems</topic><topic authorityURI="http://psi.agu.org/taxonomy5/4835">Marine inorganic chemistry</topic><topic authorityURI="http://psi.agu.org/taxonomy5/4845">Nutrients and nutrient cycling</topic><topic authorityURI="http://psi.agu.org/taxonomy5/4850">Marine organic chemistry</topic><topic authorityURI="http://psi.agu.org/taxonomy5/8100">TECTONOPHYSICS</topic><topic authorityURI="http://psi.agu.org/taxonomy5/8135">Hydrothermal systems</topic><topic authorityURI="http://psi.agu.org/taxonomy5/8400">VOLCANOLOGY</topic><topic authorityURI="http://psi.agu.org/taxonomy5/8424">Hydrothermal systems</topic><topic authorityURI="http://psi.agu.org/taxonomy5/8412">Reactions and phase equilibria</topic></subject><subject><genre>article-category</genre><topic>Oceans</topic></subject><identifier type="ISSN">0094-8276</identifier><identifier type="eISSN">1944-8007</identifier><identifier type="DOI">10.1002/(ISSN)1944-8007</identifier><identifier type="CODEN">GPRLAJ</identifier><identifier type="PublisherID">GRL</identifier><part><date>2011</date><detail type="volume"><caption>vol.</caption><number>38</number></detail><detail type="issue"><caption>no.</caption><number>8</number></detail><extent unit="pages"><start>n/a</start><end>n/a</end><total>5</total></extent></part></relatedItem><identifier type="istex">6AB6EF52CD08656D19C885C39BE2AFEE9502715D</identifier><identifier type="DOI">10.1029/2011GL047409</identifier><identifier type="ArticleID">2011GL047409</identifier><accessCondition type="use and reproduction" contentType="copyright">Copyright 2011 by the American Geophysical Union.</accessCondition><recordInfo><recordContentSource>WILEY</recordContentSource></recordInfo></mods><json:item><extension>json</extension><original>false</original><mimetype>application/json</mimetype><uri>https://api.istex.fr/document/6AB6EF52CD08656D19C885C39BE2AFEE9502715D/metadata/json</uri></json:item></metadata><serie></serie></istex></record>Pour manipuler ce document sous Unix (Dilib)
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