Holocene environmental change and the accumulation–erosion balance of sheltered river-mouth sediments, Göteborg, SW Sweden
Identifieur interne : 001563 ( Istex/Corpus ); précédent : 001562; suivant : 001564Holocene environmental change and the accumulation–erosion balance of sheltered river-mouth sediments, Göteborg, SW Sweden
Auteurs : K. Brack ; R. L Stevens ; M. PaetzelSource :
- Marine Geology [ 0025-3227 ] ; 2000.
English descriptors
Abstract
Holocene sedimentological change was investigated in 15 sediment piston cores (250cm long) from the mouth of the Göta älv River, outside of Göteborg, which is sheltered by an archipelago. The main objective was to interpret recent, natural and human-induced influences upon the accumulation–erosion balance and the sedimentary environment from Holocene sediment units. The five main units are: consolidated glaciomarine clay (Facies gC) lowermost, consolidated estuarine clay (Facies dC), soft sub-recent sediment (Facies omC and Facies C) uppermost and dumped sediment (Facies D) in some parts of the study area. The sediment facies are divided by two major hiatuses: (a) the early Holocene hiatus between Facies gC and dC involves a time gap of at least 7000years, ending at ca. 4000BP and (b) the late Holocene hiatus between the consolidated clays (Facies gC and dC) and Facies omC spans 1000years and ends ca. 50BP (i.e. 100years ago). Both hiatuses probably relate to the effects of isostatic land uplift. Surface sediments consist mainly of an organic-matter-rich clay facies, suggesting changes in the trophic state of the estuary during the last 100years. Together with human-induced increased river erosion and loss of accommodation space in the estuary, this caused the onset of sedimentation in the estuary. The recent sediments are contaminated with heavy metals (Cu, Zn, Pb, Hg), with highest concentrations in the lower part of Facies omC.
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DOI: 10.1016/S0025-3227(00)00095-5
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ISTEX:90545232429B6943AB7E7016353B39C8B5A1282ELe document en format XML
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L Stevens</name><affiliation><mods:affiliation>E-mail: karin@geo.gu.se</mods:affiliation></affiliation><affiliation><mods:affiliation>Department of Earth Sciences, Göteborg University, Box 460, SE-405 30 Göteborg, Sweden</mods:affiliation></affiliation></author><author><name sortKey="Paetzel, M" sort="Paetzel, M" uniqKey="Paetzel M" first="M" last="Paetzel">M. Paetzel</name><affiliation><mods:affiliation>E-mail: karin@geo.gu.se</mods:affiliation></affiliation><affiliation><mods:affiliation>The Faculty of Science, HSF College, P.O. Box 133, N-6851 Sogndal, Norway</mods:affiliation></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno type="RBID">ISTEX:90545232429B6943AB7E7016353B39C8B5A1282E</idno><date when="2000" year="2000">2000</date><idno type="doi">10.1016/S0025-3227(00)00095-5</idno><idno type="url">https://api.istex.fr/document/90545232429B6943AB7E7016353B39C8B5A1282E/fulltext/pdf</idno><idno type="wicri:Area/Istex/Corpus">001563</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Corpus" wicri:corpus="ISTEX">001563</idno></publicationStmt><sourceDesc><biblStruct><analytic><title level="a" type="main" xml:lang="en">Holocene environmental change and the accumulation–erosion balance of sheltered river-mouth sediments, Göteborg, SW Sweden</title><author><name sortKey="Brack, K" sort="Brack, K" uniqKey="Brack K" first="K" last="Brack">K. Brack</name><affiliation><mods:affiliation>E-mail: karin@geo.gu.se</mods:affiliation></affiliation><affiliation><mods:affiliation>Department of Earth Sciences, Göteborg University, Box 460, SE-405 30 Göteborg, Sweden</mods:affiliation></affiliation></author><author><name sortKey="Stevens, R L" sort="Stevens, R L" uniqKey="Stevens R" first="R. L" last="Stevens">R. L Stevens</name><affiliation><mods:affiliation>E-mail: karin@geo.gu.se</mods:affiliation></affiliation><affiliation><mods:affiliation>Department of Earth Sciences, Göteborg University, Box 460, SE-405 30 Göteborg, Sweden</mods:affiliation></affiliation></author><author><name sortKey="Paetzel, M" sort="Paetzel, M" uniqKey="Paetzel M" first="M" last="Paetzel">M. Paetzel</name><affiliation><mods:affiliation>E-mail: karin@geo.gu.se</mods:affiliation></affiliation><affiliation><mods:affiliation>The Faculty of Science, HSF College, P.O. Box 133, N-6851 Sogndal, Norway</mods:affiliation></affiliation></author></analytic><monogr></monogr><series><title level="j">Marine Geology</title><title level="j" type="abbrev">MARGO</title><idno type="ISSN">0025-3227</idno><imprint><publisher>ELSEVIER</publisher><date type="published" when="2000">2000</date><biblScope unit="volume">170</biblScope><biblScope unit="issue">3–4</biblScope><biblScope unit="page" from="347">347</biblScope><biblScope unit="page" to="362">362</biblScope></imprint><idno type="ISSN">0025-3227</idno></series><idno type="istex">90545232429B6943AB7E7016353B39C8B5A1282E</idno><idno type="DOI">10.1016/S0025-3227(00)00095-5</idno><idno type="PII">S0025-3227(00)00095-5</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0025-3227</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Coastal sedimentation</term><term>Estuarine environment</term><term>Heavy metals</term><term>Holocene</term><term>Human impact</term><term>Sweden</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Holocene sedimentological change was investigated in 15 sediment piston cores (250cm long) from the mouth of the Göta älv River, outside of Göteborg, which is sheltered by an archipelago. The main objective was to interpret recent, natural and human-induced influences upon the accumulation–erosion balance and the sedimentary environment from Holocene sediment units. The five main units are: consolidated glaciomarine clay (Facies gC) lowermost, consolidated estuarine clay (Facies dC), soft sub-recent sediment (Facies omC and Facies C) uppermost and dumped sediment (Facies D) in some parts of the study area. The sediment facies are divided by two major hiatuses: (a) the early Holocene hiatus between Facies gC and dC involves a time gap of at least 7000years, ending at ca. 4000BP and (b) the late Holocene hiatus between the consolidated clays (Facies gC and dC) and Facies omC spans 1000years and ends ca. 50BP (i.e. 100years ago). Both hiatuses probably relate to the effects of isostatic land uplift. Surface sediments consist mainly of an organic-matter-rich clay facies, suggesting changes in the trophic state of the estuary during the last 100years. Together with human-induced increased river erosion and loss of accommodation space in the estuary, this caused the onset of sedimentation in the estuary. The recent sediments are contaminated with heavy metals (Cu, Zn, Pb, Hg), with highest concentrations in the lower part of Facies omC.</div></front></TEI><istex><corpusName>elsevier</corpusName><author><json:item><name>K Brack</name><affiliations><json:string>E-mail: karin@geo.gu.se</json:string><json:string>Department of Earth Sciences, Göteborg University, Box 460, SE-405 30 Göteborg, Sweden</json:string></affiliations></json:item><json:item><name>R.L Stevens</name><affiliations><json:string>E-mail: karin@geo.gu.se</json:string><json:string>Department of Earth Sciences, Göteborg University, Box 460, SE-405 30 Göteborg, Sweden</json:string></affiliations></json:item><json:item><name>M Paetzel</name><affiliations><json:string>E-mail: karin@geo.gu.se</json:string><json:string>The Faculty of Science, HSF College, P.O. Box 133, N-6851 Sogndal, Norway</json:string></affiliations></json:item></author><subject><json:item><lang><json:string>eng</json:string></lang><value>Coastal sedimentation</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>Estuarine environment</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>Heavy metals</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>Holocene</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>Human impact</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>Sweden</value></json:item></subject><language><json:string>eng</json:string></language><originalGenre><json:string>Full-length article</json:string></originalGenre><abstract>Holocene sedimentological change was investigated in 15 sediment piston cores (250cm long) from the mouth of the Göta älv River, outside of Göteborg, which is sheltered by an archipelago. The main objective was to interpret recent, natural and human-induced influences upon the accumulation–erosion balance and the sedimentary environment from Holocene sediment units. The five main units are: consolidated glaciomarine clay (Facies gC) lowermost, consolidated estuarine clay (Facies dC), soft sub-recent sediment (Facies omC and Facies C) uppermost and dumped sediment (Facies D) in some parts of the study area. The sediment facies are divided by two major hiatuses: (a) the early Holocene hiatus between Facies gC and dC involves a time gap of at least 7000years, ending at ca. 4000BP and (b) the late Holocene hiatus between the consolidated clays (Facies gC and dC) and Facies omC spans 1000years and ends ca. 50BP (i.e. 100years ago). Both hiatuses probably relate to the effects of isostatic land uplift. Surface sediments consist mainly of an organic-matter-rich clay facies, suggesting changes in the trophic state of the estuary during the last 100years. Together with human-induced increased river erosion and loss of accommodation space in the estuary, this caused the onset of sedimentation in the estuary. The recent sediments are contaminated with heavy metals (Cu, Zn, Pb, Hg), with highest concentrations in the lower part of Facies omC.</abstract><qualityIndicators><score>7.688</score><pdfVersion>1.2</pdfVersion><pdfPageSize>544 x 743 pts</pdfPageSize><refBibsNative>true</refBibsNative><keywordCount>6</keywordCount><abstractCharCount>1454</abstractCharCount><pdfWordCount>7212</pdfWordCount><pdfCharCount>44416</pdfCharCount><pdfPageCount>16</pdfPageCount><abstractWordCount>224</abstractWordCount></qualityIndicators><title>Holocene environmental change and the accumulation–erosion balance of sheltered river-mouth sediments, Göteborg, SW Sweden</title><pii><json:string>S0025-3227(00)00095-5</json:string></pii><refBibs><json:item><host><author></author></host></json:item><json:item><author><json:item><name>C.R. 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Kennedy</name></json:item></editor><pages><last>175</last><first>159</first></pages><language><json:string>unknown</json:string></language><title>The Estuary as a Filter</title></serie><host><volume>170</volume><pii><json:string>S0025-3227(00)X0074-6</json:string></pii><pages><last>362</last><first>347</first></pages><issn><json:string>0025-3227</json:string></issn><issue>3–4</issue><genre><json:string>journal</json:string></genre><language><json:string>unknown</json:string></language><title>Marine Geology</title><publicationDate>2000</publicationDate></host><categories><wos><json:string>science</json:string><json:string>oceanography</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>oceanography</json:string></scienceMetrix></categories><publicationDate>2000</publicationDate><copyrightDate>2000</copyrightDate><doi><json:string>10.1016/S0025-3227(00)00095-5</json:string></doi><id>90545232429B6943AB7E7016353B39C8B5A1282E</id><score>1</score><fulltext><json:item><extension>pdf</extension><original>true</original><mimetype>application/pdf</mimetype><uri>https://api.istex.fr/document/90545232429B6943AB7E7016353B39C8B5A1282E/fulltext/pdf</uri></json:item><json:item><extension>zip</extension><original>false</original><mimetype>application/zip</mimetype><uri>https://api.istex.fr/document/90545232429B6943AB7E7016353B39C8B5A1282E/fulltext/zip</uri></json:item><istex:fulltextTEI uri="https://api.istex.fr/document/90545232429B6943AB7E7016353B39C8B5A1282E/fulltext/tei"><teiHeader><fileDesc><titleStmt><title level="a" type="main" xml:lang="en">Holocene environmental change and the accumulation–erosion balance of sheltered river-mouth sediments, Göteborg, SW Sweden</title></titleStmt><publicationStmt><authority>ISTEX</authority><publisher>ELSEVIER</publisher><availability><p>©2000 Elsevier Science B.V.</p></availability><date>2000</date></publicationStmt><notesStmt><note type="content">Fig. 1: Location map of the Göta älv River, Lake Vänern and Kattegat.</note><note type="content">Fig. 2: Bathymetric map of the Göta älv estuary, showing sampling sites with points for piston core sites, and squares for box core sites. Shipping lanes (black dashed lines), harbour quays (white dotted line) and the official dumping site are indicated. The facies in piston cores, grouped in different areas, are shown above.</note><note type="content">Fig. 3: Profiles of water content, grain size distribution, total organic carbon (TOC), CaCO3 and heavy metals (Hg, Zn, Pb, Cu) in selected cores from: (a) the middle estuary; (b) the middle and inner estuary.</note><note type="content">Fig. 4: Chirp-reflection seismic profile and schematic profile from north to south (A–B, see Fig. 2), note the vertical exaggeration. Question marks indicate non-interpreted records. The seismic survey was done by Dr P. Maurenbrecher, Delft University, and Dr B.T.A.J. Degen, Geocom.</note><note type="content">Fig. 5: 210Pb- and 137Cs-measurements in Facies omC. Facies boundaries are indicated by lines. Age estimates are based on interpretation of the 210Pb- and 137Cs-profiles, and on heavy metal trends (core 5).</note><note type="content">Fig. 6: Sea level curve for the area of Sandsjöbacka, south of Göteborg (Påsse, 1987). Phases of sediment accumulation that have been documented in the study area are marked.</note><note type="content">Table 1: Characteristics of the sediment units, presented as an average of data from all box and piston cores taken in the study area. The data from Cato (1977) represent background values in the Stora Ån, Välen estuary and Askimsviken, ca. 10km south of the Göta älv estuary</note><note type="content">Table 2: Radiocarbon dates from sites 2, 4 and 18. A correction of −340years for reservoir age is applied to the conventional ages to obtain 14C-years BP. Calendric age is given as 1σ interval of probability, determined with the program calib4 using datasets from Stuiver et al. (1998)</note><note type="content">Table 3: List of diatom species, genera and groups that were frequently found</note><note type="content">Table 4: Heavy metal concentrations of bulk sediment in the study area and in selected estuaries and harbours</note></notesStmt><sourceDesc><biblStruct type="inbook"><analytic><title level="a" type="main" xml:lang="en">Holocene environmental change and the accumulation–erosion balance of sheltered river-mouth sediments, Göteborg, SW Sweden</title><author xml:id="author-1"><persName><forename type="first">K</forename><surname>Brack</surname></persName><email>karin@geo.gu.se</email><note type="correspondence"><p>Corresponding author. Tel.: +46-31-7732812; fax: +46-31-7731849</p></note><affiliation>Department of Earth Sciences, Göteborg University, Box 460, SE-405 30 Göteborg, Sweden</affiliation></author><author xml:id="author-2"><persName><forename type="first">R.L</forename><surname>Stevens</surname></persName><email>karin@geo.gu.se</email><affiliation>Department of Earth Sciences, Göteborg University, Box 460, SE-405 30 Göteborg, Sweden</affiliation></author><author xml:id="author-3"><persName><forename type="first">M</forename><surname>Paetzel</surname></persName><email>karin@geo.gu.se</email><affiliation>The Faculty of Science, HSF College, P.O. Box 133, N-6851 Sogndal, Norway</affiliation></author></analytic><monogr><title level="j">Marine Geology</title><title level="j" type="abbrev">MARGO</title><idno type="pISSN">0025-3227</idno><idno type="PII">S0025-3227(00)X0074-6</idno><imprint><publisher>ELSEVIER</publisher><date type="published" when="2000"></date><biblScope unit="volume">170</biblScope><biblScope unit="issue">3–4</biblScope><biblScope unit="page" from="347">347</biblScope><biblScope unit="page" to="362">362</biblScope></imprint></monogr><idno type="istex">90545232429B6943AB7E7016353B39C8B5A1282E</idno><idno type="DOI">10.1016/S0025-3227(00)00095-5</idno><idno type="PII">S0025-3227(00)00095-5</idno></biblStruct></sourceDesc></fileDesc><profileDesc><creation><date>2000</date></creation><langUsage><language ident="en">en</language></langUsage><abstract xml:lang="en"><p>Holocene sedimentological change was investigated in 15 sediment piston cores (250cm long) from the mouth of the Göta älv River, outside of Göteborg, which is sheltered by an archipelago. The main objective was to interpret recent, natural and human-induced influences upon the accumulation–erosion balance and the sedimentary environment from Holocene sediment units. The five main units are: consolidated glaciomarine clay (Facies gC) lowermost, consolidated estuarine clay (Facies dC), soft sub-recent sediment (Facies omC and Facies C) uppermost and dumped sediment (Facies D) in some parts of the study area. The sediment facies are divided by two major hiatuses: (a) the early Holocene hiatus between Facies gC and dC involves a time gap of at least 7000years, ending at ca. 4000BP and (b) the late Holocene hiatus between the consolidated clays (Facies gC and dC) and Facies omC spans 1000years and ends ca. 50BP (i.e. 100years ago). Both hiatuses probably relate to the effects of isostatic land uplift. Surface sediments consist mainly of an organic-matter-rich clay facies, suggesting changes in the trophic state of the estuary during the last 100years. Together with human-induced increased river erosion and loss of accommodation space in the estuary, this caused the onset of sedimentation in the estuary. The recent sediments are contaminated with heavy metals (Cu, Zn, Pb, Hg), with highest concentrations in the lower part of Facies omC.</p></abstract><textClass xml:lang="en"><keywords scheme="keyword"><list><head>Keywords</head><item><term>Coastal sedimentation</term></item><item><term>Estuarine environment</term></item><item><term>Heavy metals</term></item><item><term>Holocene</term></item><item><term>Human impact</term></item><item><term>Sweden</term></item></list></keywords></textClass></profileDesc><revisionDesc><change when="2000">Published</change></revisionDesc></teiHeader></istex:fulltextTEI><json:item><extension>txt</extension><original>false</original><mimetype>text/plain</mimetype><uri>https://api.istex.fr/document/90545232429B6943AB7E7016353B39C8B5A1282E/fulltext/txt</uri></json:item></fulltext><metadata><istex:metadataXml wicri:clean="Elsevier, elements deleted: ce:floats; body; tail"><istex:xmlDeclaration>version="1.0" encoding="utf-8"</istex:xmlDeclaration><istex:docType PUBLIC="-//ES//DTD journal article DTD version 4.5.2//EN//XML" URI="art452.dtd" name="istex:docType"><istex:entity SYSTEM="gr1" NDATA="IMAGE" name="gr1"></istex:entity><istex:entity SYSTEM="gr2" NDATA="IMAGE" name="gr2"></istex:entity><istex:entity SYSTEM="gr3a" NDATA="IMAGE" name="gr3a"></istex:entity><istex:entity SYSTEM="gr3b" NDATA="IMAGE" name="gr3b"></istex:entity><istex:entity SYSTEM="gr4" NDATA="IMAGE" name="gr4"></istex:entity><istex:entity SYSTEM="gr5" NDATA="IMAGE" name="gr5"></istex:entity><istex:entity SYSTEM="gr6" NDATA="IMAGE" name="gr6"></istex:entity></istex:docType><istex:document><converted-article version="4.5.2" docsubtype="fla" xml:lang="en"><item-info><jid>MARGO</jid><aid>2814</aid><ce:pii>S0025-3227(00)00095-5</ce:pii><ce:doi>10.1016/S0025-3227(00)00095-5</ce:doi><ce:copyright type="full-transfer" year="2000">Elsevier Science B.V.</ce:copyright></item-info><head><ce:title>Holocene environmental change and the accumulation–erosion balance of sheltered river-mouth sediments, Göteborg, SW Sweden</ce:title><ce:author-group><ce:author><ce:given-name>K</ce:given-name><ce:surname>Brack</ce:surname><ce:cross-ref refid="AFF1"><ce:sup>a</ce:sup></ce:cross-ref><ce:cross-ref refid="CORR1">*</ce:cross-ref><ce:e-address>karin@geo.gu.se</ce:e-address></ce:author><ce:author><ce:given-name>R.L</ce:given-name><ce:surname>Stevens</ce:surname><ce:cross-ref refid="AFF1"><ce:sup>a</ce:sup></ce:cross-ref><ce:e-address>stevens@geo.gu.se</ce:e-address></ce:author><ce:author><ce:given-name>M</ce:given-name><ce:surname>Paetzel</ce:surname><ce:cross-ref refid="AFF2"><ce:sup>b</ce:sup></ce:cross-ref><ce:e-address>matthias.paetzel@anf.hisf.no</ce:e-address></ce:author><ce:affiliation id="AFF1"><ce:label>a</ce:label><ce:textfn>Department of Earth Sciences, Göteborg University, Box 460, SE-405 30 Göteborg, Sweden</ce:textfn></ce:affiliation><ce:affiliation id="AFF2"><ce:label>b</ce:label><ce:textfn>The Faculty of Science, HSF College, P.O. Box 133, N-6851 Sogndal, Norway</ce:textfn></ce:affiliation><ce:correspondence id="CORR1"><ce:label>*</ce:label><ce:text>Corresponding author. Tel.: +46-31-7732812; fax: +46-31-7731849</ce:text></ce:correspondence></ce:author-group><ce:date-received day="24" month="1" year="2000"></ce:date-received><ce:date-accepted day="26" month="6" year="2000"></ce:date-accepted><ce:abstract><ce:section-title>Abstract</ce:section-title><ce:abstract-sec><ce:simple-para>Holocene sedimentological change was investigated in 15 sediment piston cores (250<ce:hsp sp="0.25"></ce:hsp>cm long) from the mouth of the Göta älv River, outside of Göteborg, which is sheltered by an archipelago. The main objective was to interpret recent, natural and human-induced influences upon the accumulation–erosion balance and the sedimentary environment from Holocene sediment units. The five main units are: consolidated glaciomarine clay (Facies gC) lowermost, consolidated estuarine clay (Facies dC), soft sub-recent sediment (Facies omC and Facies C) uppermost and dumped sediment (Facies D) in some parts of the study area. The sediment facies are divided by two major hiatuses: (a) the early Holocene hiatus between Facies gC and dC involves a time gap of at least 7000<ce:hsp sp="0.25"></ce:hsp>years, ending at ca. 4000<ce:hsp sp="0.25"></ce:hsp>BP and (b) the late Holocene hiatus between the consolidated clays (Facies gC and dC) and Facies omC spans 1000<ce:hsp sp="0.25"></ce:hsp>years and ends ca. 50<ce:hsp sp="0.25"></ce:hsp>BP (i.e. 100<ce:hsp sp="0.25"></ce:hsp>years ago). Both hiatuses probably relate to the effects of isostatic land uplift. Surface sediments consist mainly of an organic-matter-rich clay facies, suggesting changes in the trophic state of the estuary during the last 100<ce:hsp sp="0.25"></ce:hsp>years. Together with human-induced increased river erosion and loss of accommodation space in the estuary, this caused the onset of sedimentation in the estuary. The recent sediments are contaminated with heavy metals (Cu, Zn, Pb, Hg), with highest concentrations in the lower part of Facies omC.</ce:simple-para></ce:abstract-sec></ce:abstract><ce:keywords class="keyword" xml:lang="en"><ce:section-title>Keywords</ce:section-title><ce:keyword><ce:text>Coastal sedimentation</ce:text></ce:keyword><ce:keyword><ce:text>Estuarine environment</ce:text></ce:keyword><ce:keyword><ce:text>Heavy metals</ce:text></ce:keyword><ce:keyword><ce:text>Holocene</ce:text></ce:keyword><ce:keyword><ce:text>Human impact</ce:text></ce:keyword><ce:keyword><ce:text>Sweden</ce:text></ce:keyword></ce:keywords></head></converted-article></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>Holocene environmental change and the accumulation–erosion balance of sheltered river-mouth sediments, Göteborg, SW Sweden</title></titleInfo><titleInfo type="alternative" lang="en" contentType="CDATA"><title>Holocene environmental change and the accumulation–erosion balance of sheltered river-mouth sediments, Göteborg, SW Sweden</title></titleInfo><name type="personal"><namePart type="given">K</namePart><namePart type="family">Brack</namePart><affiliation>E-mail: karin@geo.gu.se</affiliation><affiliation>Department of Earth Sciences, Göteborg University, Box 460, SE-405 30 Göteborg, Sweden</affiliation><description>Corresponding author. Tel.: +46-31-7732812; fax: +46-31-7731849</description><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">R.L</namePart><namePart type="family">Stevens</namePart><affiliation>E-mail: karin@geo.gu.se</affiliation><affiliation>Department of Earth Sciences, Göteborg University, Box 460, SE-405 30 Göteborg, Sweden</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">M</namePart><namePart type="family">Paetzel</namePart><affiliation>E-mail: karin@geo.gu.se</affiliation><affiliation>The Faculty of Science, HSF College, P.O. Box 133, N-6851 Sogndal, Norway</affiliation><role><roleTerm type="text">author</roleTerm></role></name><typeOfResource>text</typeOfResource><genre type="research-article" displayLabel="Full-length article"></genre><originInfo><publisher>ELSEVIER</publisher><dateIssued encoding="w3cdtf">2000</dateIssued><copyrightDate encoding="w3cdtf">2000</copyrightDate></originInfo><language><languageTerm type="code" authority="iso639-2b">eng</languageTerm><languageTerm type="code" authority="rfc3066">en</languageTerm></language><physicalDescription><internetMediaType>text/html</internetMediaType></physicalDescription><abstract lang="en">Holocene sedimentological change was investigated in 15 sediment piston cores (250cm long) from the mouth of the Göta älv River, outside of Göteborg, which is sheltered by an archipelago. The main objective was to interpret recent, natural and human-induced influences upon the accumulation–erosion balance and the sedimentary environment from Holocene sediment units. The five main units are: consolidated glaciomarine clay (Facies gC) lowermost, consolidated estuarine clay (Facies dC), soft sub-recent sediment (Facies omC and Facies C) uppermost and dumped sediment (Facies D) in some parts of the study area. The sediment facies are divided by two major hiatuses: (a) the early Holocene hiatus between Facies gC and dC involves a time gap of at least 7000years, ending at ca. 4000BP and (b) the late Holocene hiatus between the consolidated clays (Facies gC and dC) and Facies omC spans 1000years and ends ca. 50BP (i.e. 100years ago). Both hiatuses probably relate to the effects of isostatic land uplift. Surface sediments consist mainly of an organic-matter-rich clay facies, suggesting changes in the trophic state of the estuary during the last 100years. Together with human-induced increased river erosion and loss of accommodation space in the estuary, this caused the onset of sedimentation in the estuary. The recent sediments are contaminated with heavy metals (Cu, Zn, Pb, Hg), with highest concentrations in the lower part of Facies omC.</abstract><note type="content">Fig. 1: Location map of the Göta älv River, Lake Vänern and Kattegat.</note><note type="content">Fig. 2: Bathymetric map of the Göta älv estuary, showing sampling sites with points for piston core sites, and squares for box core sites. Shipping lanes (black dashed lines), harbour quays (white dotted line) and the official dumping site are indicated. The facies in piston cores, grouped in different areas, are shown above.</note><note type="content">Fig. 3: Profiles of water content, grain size distribution, total organic carbon (TOC), CaCO3 and heavy metals (Hg, Zn, Pb, Cu) in selected cores from: (a) the middle estuary; (b) the middle and inner estuary.</note><note type="content">Fig. 4: Chirp-reflection seismic profile and schematic profile from north to south (A–B, see Fig. 2), note the vertical exaggeration. Question marks indicate non-interpreted records. The seismic survey was done by Dr P. Maurenbrecher, Delft University, and Dr B.T.A.J. Degen, Geocom.</note><note type="content">Fig. 5: 210Pb- and 137Cs-measurements in Facies omC. Facies boundaries are indicated by lines. Age estimates are based on interpretation of the 210Pb- and 137Cs-profiles, and on heavy metal trends (core 5).</note><note type="content">Fig. 6: Sea level curve for the area of Sandsjöbacka, south of Göteborg (Påsse, 1987). Phases of sediment accumulation that have been documented in the study area are marked.</note><note type="content">Table 1: Characteristics of the sediment units, presented as an average of data from all box and piston cores taken in the study area. The data from Cato (1977) represent background values in the Stora Ån, Välen estuary and Askimsviken, ca. 10km south of the Göta älv estuary</note><note type="content">Table 2: Radiocarbon dates from sites 2, 4 and 18. A correction of −340years for reservoir age is applied to the conventional ages to obtain 14C-years BP. Calendric age is given as 1σ interval of probability, determined with the program calib4 using datasets from Stuiver et al. (1998)</note><note type="content">Table 3: List of diatom species, genera and groups that were frequently found</note><note type="content">Table 4: Heavy metal concentrations of bulk sediment in the study area and in selected estuaries and harbours</note><subject lang="en"><genre>Keywords</genre><topic>Coastal sedimentation</topic><topic>Estuarine environment</topic><topic>Heavy metals</topic><topic>Holocene</topic><topic>Human impact</topic><topic>Sweden</topic></subject><relatedItem type="host"><titleInfo><title>Marine Geology</title></titleInfo><titleInfo type="abbreviated"><title>MARGO</title></titleInfo><genre type="journal">journal</genre><originInfo><dateIssued encoding="w3cdtf">20001115</dateIssued></originInfo><identifier type="ISSN">0025-3227</identifier><identifier type="PII">S0025-3227(00)X0074-6</identifier><part><date>20001115</date><detail type="volume"><number>170</number><caption>vol.</caption></detail><detail type="issue"><number>3–4</number><caption>no.</caption></detail><extent unit="issue pages"><start>253</start><end>468</end></extent><extent unit="pages"><start>347</start><end>362</end></extent></part></relatedItem><identifier type="istex">90545232429B6943AB7E7016353B39C8B5A1282E</identifier><identifier type="DOI">10.1016/S0025-3227(00)00095-5</identifier><identifier type="PII">S0025-3227(00)00095-5</identifier><accessCondition type="use and reproduction" contentType="copyright">©2000 Elsevier Science B.V.</accessCondition><recordInfo><recordContentSource>ELSEVIER</recordContentSource><recordOrigin>Elsevier Science B.V., ©2000</recordOrigin></recordInfo></mods></metadata></istex></record>Pour manipuler ce document sous Unix (Dilib)
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