Origin of elevated sediment permeability in a hydrothermal seepage zone, eastern flank of the Juan de Fuca Ridge, and implications for transport of fluid and heat
Identifieur interne : 000A57 ( Istex/Corpus ); précédent : 000A56; suivant : 000A58Origin of elevated sediment permeability in a hydrothermal seepage zone, eastern flank of the Juan de Fuca Ridge, and implications for transport of fluid and heat
Auteurs : Emily R. Giambalvo ; Andrew T. Fisher ; Jeffrey T. Martin ; Lisa Darty ; Robert P. LowellSource :
- Journal of Geophysical Research: Solid Earth [ 0148-0227 ] ; 2000-01-10.
Abstract
Elevated sediment porosity and permeability may help to focus upward fluid seepage observed over a buried basement high on the eastern flank of the Juan de Fuca Ridge. Consolidation and permeability tests of fine‐grained hemipelagic and turbidite sediments from the seepage site and from nearby sites that are not experiencing seepage indicate that sediments at the seepage site (primarily hemipelagic) have 10–15% higher porosity and 10× higher permeability at a given depth and 10–100× lower hydraulic impedance for the 40‐m‐thick sediment column. The correlation of consolidation and permeability properties with sediment type rather than location indicates that the relatively high porosity and permeability do not result from fluid flow but are intrinsic properties of the hemipelagic sediment. On the basis of measured sediment properties, fluid pressure at the top of basement is <5 kPa greater than hydrostatic. A simple circulation model that incorporates this estimate and proximity to the nearest basement outcrops (4–20 km) suggests that local basement permeability is between 3×10−13 and 3×10−11 m2, within the range measured in nearby boreholes. The measured sediment properties combined with other published data indicate that a few tens of meters of fine‐grained terrigenous, hemipelagic, or calcareous marine sediment effectively seal the basement aquifer, whereas much thicker siliceous or pelagic sediment may support thermally and chemically significant fluid flow. The large contrast in hydraulic impedance among sediment columns of different types could cause regional variation in the evolution of ridge flank hydrothermal systems and in the contribution of seepage to ridge flank fluxes.
Url:
DOI: 10.1029/1999JB900360
Links to Exploration step
ISTEX:2E5D48D5FB3B2F477ABF0D35E39DB38367278A0ALe document en format XML
<record><TEI wicri:istexFullTextTei="biblStruct"><teiHeader><fileDesc><titleStmt><title xml:lang="en">Origin of elevated sediment permeability in a hydrothermal seepage zone, eastern flank of the Juan de Fuca Ridge, and implications for transport of fluid and heat</title><author wicri:is="90%"><name sortKey="Giambalvo, Emily R" sort="Giambalvo, Emily R" uniqKey="Giambalvo E" first="Emily R." last="Giambalvo">Emily R. Giambalvo</name></author><author wicri:is="90%"><name sortKey="Fisher, Andrew T" sort="Fisher, Andrew T" uniqKey="Fisher A" first="Andrew T." last="Fisher">Andrew T. Fisher</name></author><author wicri:is="90%"><name sortKey="Martin, Jeffrey T" sort="Martin, Jeffrey T" uniqKey="Martin J" first="Jeffrey T." last="Martin">Jeffrey T. Martin</name></author><author wicri:is="90%"><name sortKey="Darty, Lisa" sort="Darty, Lisa" uniqKey="Darty L" first="Lisa" last="Darty">Lisa Darty</name></author><author wicri:is="90%"><name sortKey="Lowell, Robert P" sort="Lowell, Robert P" uniqKey="Lowell R" first="Robert P." last="Lowell">Robert P. Lowell</name></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno type="RBID">ISTEX:2E5D48D5FB3B2F477ABF0D35E39DB38367278A0A</idno><date when="2000" year="2000">2000</date><idno type="doi">10.1029/1999JB900360</idno><idno type="url">https://api.istex.fr/document/2E5D48D5FB3B2F477ABF0D35E39DB38367278A0A/fulltext/pdf</idno><idno type="wicri:Area/Istex/Corpus">000A57</idno></publicationStmt><sourceDesc><biblStruct><analytic><title level="a" type="main" xml:lang="en">Origin of elevated sediment permeability in a hydrothermal seepage zone, eastern flank of the Juan de Fuca Ridge, and implications for transport of fluid and heat</title><author wicri:is="90%"><name sortKey="Giambalvo, Emily R" sort="Giambalvo, Emily R" uniqKey="Giambalvo E" first="Emily R." last="Giambalvo">Emily R. Giambalvo</name></author><author wicri:is="90%"><name sortKey="Fisher, Andrew T" sort="Fisher, Andrew T" uniqKey="Fisher A" first="Andrew T." last="Fisher">Andrew T. Fisher</name></author><author wicri:is="90%"><name sortKey="Martin, Jeffrey T" sort="Martin, Jeffrey T" uniqKey="Martin J" first="Jeffrey T." last="Martin">Jeffrey T. Martin</name></author><author wicri:is="90%"><name sortKey="Darty, Lisa" sort="Darty, Lisa" uniqKey="Darty L" first="Lisa" last="Darty">Lisa Darty</name></author><author wicri:is="90%"><name sortKey="Lowell, Robert P" sort="Lowell, Robert P" uniqKey="Lowell R" first="Robert P." last="Lowell">Robert P. Lowell</name></author></analytic><monogr></monogr><series><title level="j">Journal of Geophysical Research: Solid Earth</title><title level="j" type="abbrev">J. Geophys. Res.</title><idno type="ISSN">0148-0227</idno><idno type="eISSN">2156-2202</idno><imprint><publisher>Blackwell Publishing Ltd</publisher><date type="published" when="2000-01-10">2000-01-10</date><biblScope unit="volume">105</biblScope><biblScope unit="issue">B1</biblScope><biblScope unit="page" from="913">913</biblScope><biblScope unit="page" to="928">928</biblScope></imprint><idno type="ISSN">0148-0227</idno></series><idno type="istex">2E5D48D5FB3B2F477ABF0D35E39DB38367278A0A</idno><idno type="DOI">10.1029/1999JB900360</idno><idno type="ArticleID">1999JB900360</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0148-0227</idno></seriesStmt></fileDesc><profileDesc><textClass></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract">Elevated sediment porosity and permeability may help to focus upward fluid seepage observed over a buried basement high on the eastern flank of the Juan de Fuca Ridge. Consolidation and permeability tests of fine‐grained hemipelagic and turbidite sediments from the seepage site and from nearby sites that are not experiencing seepage indicate that sediments at the seepage site (primarily hemipelagic) have 10–15% higher porosity and 10× higher permeability at a given depth and 10–100× lower hydraulic impedance for the 40‐m‐thick sediment column. The correlation of consolidation and permeability properties with sediment type rather than location indicates that the relatively high porosity and permeability do not result from fluid flow but are intrinsic properties of the hemipelagic sediment. On the basis of measured sediment properties, fluid pressure at the top of basement is <5 kPa greater than hydrostatic. A simple circulation model that incorporates this estimate and proximity to the nearest basement outcrops (4–20 km) suggests that local basement permeability is between 3×10−13 and 3×10−11 m2, within the range measured in nearby boreholes. The measured sediment properties combined with other published data indicate that a few tens of meters of fine‐grained terrigenous, hemipelagic, or calcareous marine sediment effectively seal the basement aquifer, whereas much thicker siliceous or pelagic sediment may support thermally and chemically significant fluid flow. The large contrast in hydraulic impedance among sediment columns of different types could cause regional variation in the evolution of ridge flank hydrothermal systems and in the contribution of seepage to ridge flank fluxes.</div></front></TEI><istex><corpusName>wiley</corpusName><author><json:item><name>Emily R. Giambalvo</name></json:item><json:item><name>Andrew T. Fisher</name></json:item><json:item><name>Jeffrey T. Martin</name></json:item><json:item><name>Lisa Darty</name></json:item><json:item><name>Robert P. Lowell</name></json:item></author><articleId><json:string>1999JB900360</json:string></articleId><language><json:string>eng</json:string></language><abstract>Elevated sediment porosity and permeability may help to focus upward fluid seepage observed over a buried basement high on the eastern flank of the Juan de Fuca Ridge. Consolidation and permeability tests of fine‐grained hemipelagic and turbidite sediments from the seepage site and from nearby sites that are not experiencing seepage indicate that sediments at the seepage site (primarily hemipelagic) have 10–15% higher porosity and 10× higher permeability at a given depth and 10–100× lower hydraulic impedance for the 40‐m‐thick sediment column. The correlation of consolidation and permeability properties with sediment type rather than location indicates that the relatively high porosity and permeability do not result from fluid flow but are intrinsic properties of the hemipelagic sediment. On the basis of measured sediment properties, fluid pressure at the top of basement is >5 kPa greater than hydrostatic. A simple circulation model that incorporates this estimate and proximity to the nearest basement outcrops (4–20 km) suggests that local basement permeability is between 3×10−13 and 3×10−11 m2, within the range measured in nearby boreholes. The measured sediment properties combined with other published data indicate that a few tens of meters of fine‐grained terrigenous, hemipelagic, or calcareous marine sediment effectively seal the basement aquifer, whereas much thicker siliceous or pelagic sediment may support thermally and chemically significant fluid flow. The large contrast in hydraulic impedance among sediment columns of different types could cause regional variation in the evolution of ridge flank hydrothermal systems and in the contribution of seepage to ridge flank fluxes.</abstract><qualityIndicators><score>8</score><pdfVersion>1.3</pdfVersion><pdfPageSize>607 x 812 pts</pdfPageSize><refBibsNative>true</refBibsNative><keywordCount>0</keywordCount><abstractCharCount>1711</abstractCharCount><pdfWordCount>6462</pdfWordCount><pdfCharCount>61677</pdfCharCount><pdfPageCount>16</pdfPageCount><abstractWordCount>250</abstractWordCount></qualityIndicators><title>Origin of elevated sediment permeability in a hydrothermal seepage zone, eastern flank of the Juan de Fuca Ridge, and implications for transport of fluid and heat</title><genre.original><json:string>article</json:string></genre.original><genre><json:string>article</json:string></genre><host><volume>105</volume><publisherId><json:string>JGRB</json:string></publisherId><pages><total>16</total><last>928</last><first>913</first></pages><issn><json:string>0148-0227</json:string></issn><issue>B1</issue><subject><json:item><value>BIOGEOSCIENCES</value></json:item><json:item><value>Hydrothermal systems</value></json:item><json:item><value>GEOCHEMISTRY</value></json:item><json:item><value>Hydrothermal systems</value></json:item><json:item><value>MARINE GEOLOGY AND GEOPHYSICS</value></json:item><json:item><value>Marine Geology and Geophysics: Heat flow (benthic)</value></json:item><json:item><value>Hydrothermal systems</value></json:item><json:item><value>Marine sediments: processes and transport</value></json:item><json:item><value>MINERALOGY AND PETROLOGY</value></json:item><json:item><value>Hydrothermal systems</value></json:item><json:item><value>OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL</value></json:item><json:item><value>Hydrothermal systems</value></json:item><json:item><value>PHYSICAL PROPERTIES OF ROCKS</value></json:item><json:item><value>Permeability and porosity</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>Papers on Geomagnetism and Paleomagnetism Marine Geology and Geophysics</value></json:item></subject><genre><json:string>journal</json:string></genre><language><json:string>unknown</json:string></language><eissn><json:string>2156-2202</json:string></eissn><title>Journal of Geophysical Research: Solid Earth</title><doi><json:string>10.1002/(ISSN)2156-2202b</json:string></doi></host><publicationDate>2000</publicationDate><copyrightDate>2000</copyrightDate><doi><json:string>10.1029/1999JB900360</json:string></doi><id>2E5D48D5FB3B2F477ABF0D35E39DB38367278A0A</id><fulltext><json:item><original>true</original><mimetype>application/pdf</mimetype><extension>pdf</extension><uri>https://api.istex.fr/document/2E5D48D5FB3B2F477ABF0D35E39DB38367278A0A/fulltext/pdf</uri></json:item><json:item><original>false</original><mimetype>application/zip</mimetype><extension>zip</extension><uri>https://api.istex.fr/document/2E5D48D5FB3B2F477ABF0D35E39DB38367278A0A/fulltext/zip</uri></json:item><istex:fulltextTEI uri="https://api.istex.fr/document/2E5D48D5FB3B2F477ABF0D35E39DB38367278A0A/fulltext/tei"><teiHeader><fileDesc><titleStmt><title level="a" type="main" xml:lang="en">Origin of elevated sediment permeability in a hydrothermal seepage zone, eastern flank of the Juan de Fuca Ridge, and implications for transport of fluid and heat</title></titleStmt><publicationStmt><authority>ISTEX</authority><publisher>Blackwell Publishing Ltd</publisher><availability><p>WILEY</p></availability><date>2000</date></publicationStmt><sourceDesc><biblStruct type="inbook"><analytic><title level="a" type="main" xml:lang="en">Origin of elevated sediment permeability in a hydrothermal seepage zone, eastern flank of the Juan de Fuca Ridge, and implications for transport of fluid and heat</title><author><persName><forename type="first">Emily R.</forename><surname>Giambalvo</surname></persName></author><author><persName><forename type="first">Andrew T.</forename><surname>Fisher</surname></persName></author><author><persName><forename type="first">Jeffrey T.</forename><surname>Martin</surname></persName></author><author><persName><forename type="first">Lisa</forename><surname>Darty</surname></persName></author><author><persName><forename type="first">Robert P.</forename><surname>Lowell</surname></persName></author></analytic><monogr><title level="j">Journal of Geophysical Research: Solid Earth</title><title level="j" type="abbrev">J. Geophys. Res.</title><idno type="pISSN">0148-0227</idno><idno type="eISSN">2156-2202</idno><idno type="DOI">10.1002/(ISSN)2156-2202b</idno><imprint><publisher>Blackwell Publishing Ltd</publisher><date type="published" when="2000-01-10"></date><biblScope unit="volume">105</biblScope><biblScope unit="issue">B1</biblScope><biblScope unit="page" from="913">913</biblScope><biblScope unit="page" to="928">928</biblScope></imprint></monogr><idno type="istex">2E5D48D5FB3B2F477ABF0D35E39DB38367278A0A</idno><idno type="DOI">10.1029/1999JB900360</idno><idno type="ArticleID">1999JB900360</idno></biblStruct></sourceDesc></fileDesc><profileDesc><creation><date>2000</date></creation><langUsage><language ident="en">en</language></langUsage><abstract><p>Elevated sediment porosity and permeability may help to focus upward fluid seepage observed over a buried basement high on the eastern flank of the Juan de Fuca Ridge. Consolidation and permeability tests of fine‐grained hemipelagic and turbidite sediments from the seepage site and from nearby sites that are not experiencing seepage indicate that sediments at the seepage site (primarily hemipelagic) have 10–15% higher porosity and 10× higher permeability at a given depth and 10–100× lower hydraulic impedance for the 40‐m‐thick sediment column. The correlation of consolidation and permeability properties with sediment type rather than location indicates that the relatively high porosity and permeability do not result from fluid flow but are intrinsic properties of the hemipelagic sediment. On the basis of measured sediment properties, fluid pressure at the top of basement is <5 kPa greater than hydrostatic. A simple circulation model that incorporates this estimate and proximity to the nearest basement outcrops (4–20 km) suggests that local basement permeability is between 3×10−13 and 3×10−11 m2, within the range measured in nearby boreholes. The measured sediment properties combined with other published data indicate that a few tens of meters of fine‐grained terrigenous, hemipelagic, or calcareous marine sediment effectively seal the basement aquifer, whereas much thicker siliceous or pelagic sediment may support thermally and chemically significant fluid flow. The large contrast in hydraulic impedance among sediment columns of different types could cause regional variation in the evolution of ridge flank hydrothermal systems and in the contribution of seepage to ridge flank fluxes.</p></abstract><textClass><keywords scheme="Journal Subject"><list><head>index-terms</head><item><term>BIOGEOSCIENCES</term></item><item><term>Hydrothermal systems</term></item><item><term>GEOCHEMISTRY</term></item><item><term>Hydrothermal systems</term></item><item><term>MARINE GEOLOGY AND GEOPHYSICS</term></item><item><term>Marine Geology and Geophysics: Heat flow (benthic)</term></item><item><term>Hydrothermal systems</term></item><item><term>Marine sediments: processes and transport</term></item><item><term>MINERALOGY AND PETROLOGY</term></item><item><term>Hydrothermal systems</term></item><item><term>OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL</term></item><item><term>Hydrothermal systems</term></item><item><term>PHYSICAL PROPERTIES OF ROCKS</term></item><item><term>Permeability and porosity</term></item><item><term>TECTONOPHYSICS</term></item><item><term>Hydrothermal systems</term></item><item><term>VOLCANOLOGY</term></item><item><term>Hydrothermal systems</term></item></list></keywords></textClass><textClass><keywords scheme="Journal Subject"><list><head>article-category</head><item><term>Papers on Geomagnetism and Paleomagnetism Marine Geology and Geophysics</term></item></list></keywords></textClass></profileDesc><revisionDesc><change when="1999-03-12">Received</change><change when="1999-10-06">Registration</change><change when="2000-01-10">Published</change></revisionDesc></teiHeader></istex:fulltextTEI><json:item><original>false</original><mimetype>text/plain</mimetype><extension>txt</extension><uri>https://api.istex.fr/document/2E5D48D5FB3B2F477ABF0D35E39DB38367278A0A/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="jgrb12116"><header><publicationMeta level="product"><doi>10.1002/(ISSN)2156-2202b</doi><issn type="print">0148-0227</issn><issn type="electronic">2156-2202</issn><idGroup><id type="product" value="JGRB"></id><id type="coden" value="JGREA2"></id></idGroup><titleGroup><title type="main" xml:lang="en" sort="JOURNAL OF GEOPHYSICAL RESEARCH: SOLID EARTH">Journal of Geophysical Research: Solid Earth</title><title type="short">J. Geophys. Res.</title></titleGroup></publicationMeta><publicationMeta level="part" position="10"><doi>10.1002/jgrb.v105.B1</doi><idGroup><id type="focusSection" value="2"></id></idGroup><titleGroup><title type="focusSection" xml:lang="en">Journal of Geophysical Research: Solid Earth</title></titleGroup><numberingGroup><numbering type="journalVolume" number="105">105</numbering><numbering type="journalIssue">B1</numbering></numberingGroup><coverDate startDate="2000-01-10">10 January 2000</coverDate></publicationMeta><publicationMeta level="unit" type="article" position="320" status="forIssue"><doi>10.1029/1999JB900360</doi><idGroup><id type="editorialOffice" value="1999JB900360"></id><id type="unit" value="JGRB12116"></id></idGroup><countGroup><count type="pageTotal" number="16"></count></countGroup><titleGroup><title type="articleCategory">Papers on Geomagnetism and Paleomagnetism Marine Geology and Geophysics</title><title type="tocHeading1">Papers on Geomagnetism and Paleomagnetism Marine Geology and Geophysics</title></titleGroup><copyright ownership="thirdParty">Copyright 2000 by the American Geophysical Union.</copyright><eventGroup><event type="manuscriptReceived" date="1999-03-12"></event><event type="manuscriptAccepted" date="1999-10-06"></event><event type="publishedPrint" date="2000-01-10"></event><event type="firstOnline" date="2012-09-20"></event><event type="publishedOnlineFinalForm" date="2012-09-20"></event><event type="xmlConverted" agent="SPi Global Converter:AGUv1.0_TO_WileyML3Gv1.0.3 version:1.2; WileyML 3G Packaging Tool v1.0" date="2013-02-28"></event><event type="xmlConverted" agent="Converter:WILEY_ML3G_TO_WILEY_ML3GV2 version:3.8.8" date="2014-01-31"></event><event type="xmlConverted" agent="Converter:WML3G_To_WML3G version:4.1.7 mode:FullText,remove_FC" date="2014-10-30"></event></eventGroup><numberingGroup><numbering type="pageFirst">913</numbering><numbering type="pageLast">928</numbering></numberingGroup><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 role="crossTerm" href="http://psi.agu.org/taxonomy5/1000">GEOCHEMISTRY</subject><subjectInfo><subject role="crossTerm" href="http://psi.agu.org/taxonomy5/1034">Hydrothermal systems</subject></subjectInfo><subject href="http://psi.agu.org/taxonomy5/3000">MARINE GEOLOGY AND GEOPHYSICS</subject><subjectInfo><subject href="http://psi.agu.org/taxonomy5/3015">Marine Geology and Geophysics: Heat flow (benthic)</subject><subject href="http://psi.agu.org/taxonomy5/3017">Hydrothermal systems</subject><subject href="http://psi.agu.org/taxonomy5/3022">Marine sediments: processes and transport</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></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></subjectInfo><subject href="http://psi.agu.org/taxonomy5/5100">PHYSICAL PROPERTIES OF ROCKS</subject><subjectInfo><subject href="http://psi.agu.org/taxonomy5/5114">Permeability and porosity</subject></subjectInfo><subject role="crossTerm" 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></subjectInfo></subjectInfo><selfCitationGroup><citation xml:id="jgrb12116-cit-0000" type="self"><author><familyName>Giambalvo</familyName>, <givenNames>E. R.</givenNames></author>, <author><givenNames>A. T.</givenNames> <familyName>Fisher</familyName></author>, <author><givenNames>J. T.</givenNames> <familyName>Martin</familyName></author>, <author><givenNames>L.</givenNames> <familyName>Darty</familyName></author>, and <author><givenNames>R. P.</givenNames> <familyName>Lowell</familyName></author> (<pubYear year="2000">2000</pubYear>), <articleTitle>Origin of elevated sediment permeability in a hydrothermal seepage zone, eastern flank of the Juan de Fuca Ridge, and implications for transport of fluid and heat</articleTitle>, <journalTitle>J. Geophys. Res.</journalTitle>, <vol>105</vol>(<issue>B1</issue>), <pageFirst>913</pageFirst>–<pageLast>928</pageLast>, doi:<accessionId ref="info:doi/10.1029/1999JB900360">10.1029/1999JB900360</accessionId>.</citation></selfCitationGroup><linkGroup><link type="toTypesetVersion" href="file:JGRB.JGRB12116.pdf"></link></linkGroup></publicationMeta><contentMeta><titleGroup><title type="main">Origin of elevated sediment permeability in a hydrothermal seepage zone, eastern flank of the Juan de Fuca Ridge, and implications for transport of fluid and heat</title><title type="shortAuthors">Giambalvo ET AL.</title></titleGroup><creators><creator xml:id="jgrb12116-cr-0001"><personName><givenNames>Emily R.</givenNames><familyName>Giambalvo</familyName></personName></creator><creator xml:id="jgrb12116-cr-0002"><personName><givenNames>Andrew T.</givenNames><familyName>Fisher</familyName></personName></creator><creator xml:id="jgrb12116-cr-0003"><personName><givenNames>Jeffrey T.</givenNames><familyName>Martin</familyName></personName></creator><creator xml:id="jgrb12116-cr-0004"><personName><givenNames>Lisa</givenNames><familyName>Darty</familyName></personName></creator><creator xml:id="jgrb12116-cr-0005"><personName><givenNames>Robert P.</givenNames><familyName>Lowell</familyName></personName></creator></creators><abstractGroup><abstract type="main"><p xml:id="jgrb12116-para-0001">Elevated sediment porosity and permeability may help to focus upward fluid seepage observed over a buried basement high on the eastern flank of the Juan de Fuca Ridge. Consolidation and permeability tests of fine‐grained hemipelagic and turbidite sediments from the seepage site and from nearby sites that are not experiencing seepage indicate that sediments at the seepage site (primarily hemipelagic) have 10–15% higher porosity and 10× higher permeability at a given depth and 10–100× lower hydraulic impedance for the 40‐m‐thick sediment column. The correlation of consolidation and permeability properties with sediment type rather than location indicates that the relatively high porosity and permeability do not result from fluid flow but are intrinsic properties of the hemipelagic sediment. On the basis of measured sediment properties, fluid pressure at the top of basement is <5 kPa greater than hydrostatic. A simple circulation model that incorporates this estimate and proximity to the nearest basement outcrops (4–20 km) suggests that local basement permeability is between 3×10<sup>−13</sup> and 3×10<sup>−11</sup> m<sup>2</sup>, within the range measured in nearby boreholes. The measured sediment properties combined with other published data indicate that a few tens of meters of fine‐grained terrigenous, hemipelagic, or calcareous marine sediment effectively seal the basement aquifer, whereas much thicker siliceous or pelagic sediment may support thermally and chemically significant fluid flow. The large contrast in hydraulic impedance among sediment columns of different types could cause regional variation in the evolution of ridge flank hydrothermal systems and in the contribution of seepage to ridge flank fluxes.</p></abstract></abstractGroup></contentMeta></header></component></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>Origin of elevated sediment permeability in a hydrothermal seepage zone, eastern flank of the Juan de Fuca Ridge, and implications for transport of fluid and heat</title></titleInfo><titleInfo type="alternative" contentType="CDATA" lang="en"><title>Origin of elevated sediment permeability in a hydrothermal seepage zone, eastern flank of the Juan de Fuca Ridge, and implications for transport of fluid and heat</title></titleInfo><name type="personal"><namePart type="given">Emily R.</namePart><namePart type="family">Giambalvo</namePart></name><name type="personal"><namePart type="given">Andrew T.</namePart><namePart type="family">Fisher</namePart></name><name type="personal"><namePart type="given">Jeffrey T.</namePart><namePart type="family">Martin</namePart></name><name type="personal"><namePart type="given">Lisa</namePart><namePart type="family">Darty</namePart></name><name type="personal"><namePart type="given">Robert P.</namePart><namePart type="family">Lowell</namePart></name><typeOfResource>text</typeOfResource><genre type="article" displayLabel="article"></genre><originInfo><publisher>Blackwell Publishing Ltd</publisher><dateIssued encoding="w3cdtf">2000-01-10</dateIssued><dateCaptured encoding="w3cdtf">1999-03-12</dateCaptured><dateValid encoding="w3cdtf">1999-10-06</dateValid><edition>Giambalvo, E. R., A. T. Fisher, J. T. Martin, L. Darty, and R. P. Lowell (2000), Origin of elevated sediment permeability in a hydrothermal seepage zone, eastern flank of the Juan de Fuca Ridge, and implications for transport of fluid and heat, J. Geophys. Res., 105(B1), 913–928, doi:10.1029/1999JB900360.</edition><copyrightDate encoding="w3cdtf">2000</copyrightDate></originInfo><language><languageTerm type="code" authority="rfc3066">en</languageTerm><languageTerm type="code" authority="iso639-2b">eng</languageTerm></language><physicalDescription><internetMediaType>text/html</internetMediaType></physicalDescription><abstract>Elevated sediment porosity and permeability may help to focus upward fluid seepage observed over a buried basement high on the eastern flank of the Juan de Fuca Ridge. Consolidation and permeability tests of fine‐grained hemipelagic and turbidite sediments from the seepage site and from nearby sites that are not experiencing seepage indicate that sediments at the seepage site (primarily hemipelagic) have 10–15% higher porosity and 10× higher permeability at a given depth and 10–100× lower hydraulic impedance for the 40‐m‐thick sediment column. The correlation of consolidation and permeability properties with sediment type rather than location indicates that the relatively high porosity and permeability do not result from fluid flow but are intrinsic properties of the hemipelagic sediment. On the basis of measured sediment properties, fluid pressure at the top of basement is <5 kPa greater than hydrostatic. A simple circulation model that incorporates this estimate and proximity to the nearest basement outcrops (4–20 km) suggests that local basement permeability is between 3×10−13 and 3×10−11 m2, within the range measured in nearby boreholes. The measured sediment properties combined with other published data indicate that a few tens of meters of fine‐grained terrigenous, hemipelagic, or calcareous marine sediment effectively seal the basement aquifer, whereas much thicker siliceous or pelagic sediment may support thermally and chemically significant fluid flow. The large contrast in hydraulic impedance among sediment columns of different types could cause regional variation in the evolution of ridge flank hydrothermal systems and in the contribution of seepage to ridge flank fluxes.</abstract><relatedItem type="host"><titleInfo><title>Journal of Geophysical Research: Solid Earth</title></titleInfo><titleInfo type="abbreviated"><title>J. Geophys. Res.</title></titleInfo><genre type="journal">journal</genre><subject><genre>index-terms</genre><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/taxonomy5/3000">MARINE GEOLOGY AND GEOPHYSICS</topic><topic authorityURI="http://psi.agu.org/taxonomy5/3015">Marine Geology and Geophysics: Heat flow (benthic)</topic><topic authorityURI="http://psi.agu.org/taxonomy5/3017">Hydrothermal systems</topic><topic authorityURI="http://psi.agu.org/taxonomy5/3022">Marine sediments: processes and transport</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/taxonomy5/4800">OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL</topic><topic authorityURI="http://psi.agu.org/taxonomy5/4832">Hydrothermal systems</topic><topic authorityURI="http://psi.agu.org/taxonomy5/5100">PHYSICAL PROPERTIES OF ROCKS</topic><topic authorityURI="http://psi.agu.org/taxonomy5/5114">Permeability and porosity</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></subject><subject><genre>article-category</genre><topic>Papers on Geomagnetism and Paleomagnetism Marine Geology and Geophysics</topic></subject><identifier type="ISSN">0148-0227</identifier><identifier type="eISSN">2156-2202</identifier><identifier type="DOI">10.1002/(ISSN)2156-2202b</identifier><identifier type="CODEN">JGREA2</identifier><identifier type="PublisherID">JGRB</identifier><part><date>2000</date><detail type="volume"><caption>vol.</caption><number>105</number></detail><detail type="issue"><caption>no.</caption><number>B1</number></detail><extent unit="pages"><start>913</start><end>928</end><total>16</total></extent></part></relatedItem><identifier type="istex">2E5D48D5FB3B2F477ABF0D35E39DB38367278A0A</identifier><identifier type="DOI">10.1029/1999JB900360</identifier><identifier type="ArticleID">1999JB900360</identifier><accessCondition type="use and reproduction" contentType="copyright">Copyright 2000 by the American Geophysical Union.</accessCondition><recordInfo><recordContentSource>WILEY</recordContentSource></recordInfo></mods></metadata><serie></serie></istex></record>Pour manipuler ce document sous Unix (Dilib)
EXPLOR_STEP=$WICRI_ROOT/Ticri/CIDE/explor/OcrV1/Data/Istex/Corpus
HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 000A57 | SxmlIndent | more
Ou
HfdSelect -h $EXPLOR_AREA/Data/Istex/Corpus/biblio.hfd -nk 000A57 | SxmlIndent | more
Pour mettre un lien sur cette page dans le réseau Wicri
{{Explor lien
|wiki= Ticri/CIDE
|area= OcrV1
|flux= Istex
|étape= Corpus
|type= RBID
|clé= ISTEX:2E5D48D5FB3B2F477ABF0D35E39DB38367278A0A
|texte= Origin of elevated sediment permeability in a hydrothermal seepage zone, eastern flank of the Juan de Fuca Ridge, and implications for transport of fluid and heat
}}
| This area was generated with Dilib version V0.6.32. |  |