Sedimentation patterns on a cold-water coral mound off Mauritania
An unconformity-bound glacial sequence (135cm thick) of a coral-bearing sediment core collected from the flank of a cold-water coral mound in the Banda Mound Province off Mauritania was analysed. In order to study the relation between coral framework growth and its filling by hemipelagic sediments,...
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| Veröffentlicht in: | Deep-sea research. Part 2. Topical studies in oceanography 2014-01, Vol.99, p.307-315 |
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| creator | Eisele, Markus Frank, Norbert Wienberg, Claudia Titschack, Jürgen Mienis, Furu Beuck, Lydia Tisnerat-Laborde, Nadine Hebbeln, Dierk |
| description | An unconformity-bound glacial sequence (135cm thick) of a coral-bearing sediment core collected from the flank of a cold-water coral mound in the Banda Mound Province off Mauritania was analysed. In order to study the relation between coral framework growth and its filling by hemipelagic sediments, U-series dates obtained from the cold-water coral species Lophelia pertusa were compared to 14C dates of planktonic foraminifera of the surrounding matrix sediments. The coral ages, ranging from 45.1 to 32.3kaBP, exhibit no clear depositional trend, while on the other hand the 14C dates of the matrix sediment provide ages within a much narrower time window of |
| doi_str_mv | 10.1016/j.dsr2.2013.07.004 |
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•Cold-water coral mound formation is mainly influenced by the baffling of fine grained material within a coral framework.•Mass wasting appears to be an important mound progradation process.•Even heavily reworked sediments contain valuable information on the original mound aggradation processes.</description><identifier>ISSN: 0967-0645</identifier><identifier>EISSN: 1879-0100</identifier><identifier>DOI: 10.1016/j.dsr2.2013.07.004</identifier><language>eng</language><publisher>Kidlington: Elsevier Ltd</publisher><subject>Age ; Baffling effect ; Cold-water coral mound ; Continental interfaces, environment ; Corals ; Density ; Deposition ; Earth sciences ; Earth, ocean, space ; Exact sciences and technology ; External geophysics ; Flanks ; Lophelia pertusa ; Marine and continental quaternary ; Marine geology ; Mass wasting ; Mauritania ; Mound progradation ; Ocean, Atmosphere ; Packages ; Physics of the oceans ; Sciences of the Universe ; Sedimentation ; Sediments ; Surficial geology</subject><ispartof>Deep-sea research. Part 2. Topical studies in oceanography, 2014-01, Vol.99, p.307-315</ispartof><rights>2013 Elsevier Ltd</rights><rights>2015 INIST-CNRS</rights><rights>Distributed under a Creative Commons Attribution 4.0 International License</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a453t-21b4d0735ea8db39c8a1f2e1f7ef0c7847d4ada639c49997fd090dd61941b0683</citedby><cites>FETCH-LOGICAL-a453t-21b4d0735ea8db39c8a1f2e1f7ef0c7847d4ada639c49997fd090dd61941b0683</cites><orcidid>0000-0002-7697-3605</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.dsr2.2013.07.004$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>230,309,310,314,780,784,789,790,885,3550,4050,4051,23930,23931,25140,27924,27925,45995</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=28226857$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://hal.science/hal-02468755$$DView record in HAL$$Hfree_for_read</backlink></links><search><creatorcontrib>Eisele, Markus</creatorcontrib><creatorcontrib>Frank, Norbert</creatorcontrib><creatorcontrib>Wienberg, Claudia</creatorcontrib><creatorcontrib>Titschack, Jürgen</creatorcontrib><creatorcontrib>Mienis, Furu</creatorcontrib><creatorcontrib>Beuck, Lydia</creatorcontrib><creatorcontrib>Tisnerat-Laborde, Nadine</creatorcontrib><creatorcontrib>Hebbeln, Dierk</creatorcontrib><title>Sedimentation patterns on a cold-water coral mound off Mauritania</title><title>Deep-sea research. Part 2. Topical studies in oceanography</title><description>An unconformity-bound glacial sequence (135cm thick) of a coral-bearing sediment core collected from the flank of a cold-water coral mound in the Banda Mound Province off Mauritania was analysed. In order to study the relation between coral framework growth and its filling by hemipelagic sediments, U-series dates obtained from the cold-water coral species Lophelia pertusa were compared to 14C dates of planktonic foraminifera of the surrounding matrix sediments. The coral ages, ranging from 45.1 to 32.3kaBP, exhibit no clear depositional trend, while on the other hand the 14C dates of the matrix sediment provide ages within a much narrower time window of <3000yrs (34.6–31.8calkaBP), corresponding to the latest phase of the coral growth period. In addition, high-resolution computer tomography data revealed a subdivision of the investigated sediment package into three distinct parts, defined by the portion and fragmentation of corals and associated macrofauna as well as in the density of the matrix sediments. Grain size spectra obtained on the matrix sediments show a homogeneous pattern throughout the core sediment package, with minor variations. These features are interpreted as indicators of redeposition. Based on the observed structures and the dating results, the sediments were interpreted as deposits of a mass wasting event, namely a debris flow. During this event, the sediment unit must have been entirely mixed; resulting in averaging of the foraminifera ages from the whole unit and giving randomly distributed coral ages. In this context, for the first time mass wasting is proposed to be a substantial process of mound progradation by exporting material from the mound top to the flanks. Hence, it may not only be an erosional feature but also widening the base of the mound, thus allowing further vertical mound growth.
•Cold-water coral mound formation is mainly influenced by the baffling of fine grained material within a coral framework.•Mass wasting appears to be an important mound progradation process.•Even heavily reworked sediments contain valuable information on the original mound aggradation processes.</description><subject>Age</subject><subject>Baffling effect</subject><subject>Cold-water coral mound</subject><subject>Continental interfaces, environment</subject><subject>Corals</subject><subject>Density</subject><subject>Deposition</subject><subject>Earth sciences</subject><subject>Earth, ocean, space</subject><subject>Exact sciences and technology</subject><subject>External geophysics</subject><subject>Flanks</subject><subject>Lophelia pertusa</subject><subject>Marine and continental quaternary</subject><subject>Marine geology</subject><subject>Mass wasting</subject><subject>Mauritania</subject><subject>Mound progradation</subject><subject>Ocean, Atmosphere</subject><subject>Packages</subject><subject>Physics of the oceans</subject><subject>Sciences of the Universe</subject><subject>Sedimentation</subject><subject>Sediments</subject><subject>Surficial geology</subject><issn>0967-0645</issn><issn>1879-0100</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2014</creationdate><recordtype>article</recordtype><recordid>eNqNkU1r3DAQhkVoIds0fyAnXwrtwc5I1ocFvSwhX7Chh7ZnMasPqsVrbSVvSv99ZDbkWHrSMHpm9KKHkCsKHQUqr3edK5l1DGjfgeoA-BlZ0UHpFijAO7ICLVULkotz8qGUHQD0vdQrsv7uXdz7acY5pqk54Dz7PJWm1tjYNLr2D9ZOLTOOzT4dJ9ekEJonPOY44xTxI3kfcCz-8vW8ID_vbn_cPLSbb_ePN-tNi1z0c8voljtQvfA4uG2v7YA0ME-D8gGsGrhyHB3KesO11io40OCcpJrTLcihvyBfTnt_4WgOOe4x_zUJo3lYb8zSA8bloIR4ppX9fGIPOf0--jKbfSzWjyNOPh2LoZIzJgUT4j9QprTgtF8SsBNqcyol-_AWg4JZNJidWTSYRYMBZaqGOvTpdT8Wi2PIONlY3ibZUIMMQlXu64nz9Q-fo8-m2OgnW_Vkb2fjUvzXMy8IdJsl</recordid><startdate>201401</startdate><enddate>201401</enddate><creator>Eisele, Markus</creator><creator>Frank, Norbert</creator><creator>Wienberg, Claudia</creator><creator>Titschack, Jürgen</creator><creator>Mienis, Furu</creator><creator>Beuck, Lydia</creator><creator>Tisnerat-Laborde, Nadine</creator><creator>Hebbeln, Dierk</creator><general>Elsevier Ltd</general><general>Elsevier</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7TG</scope><scope>7TN</scope><scope>F1W</scope><scope>H95</scope><scope>KL.</scope><scope>L.G</scope><scope>8FD</scope><scope>FR3</scope><scope>H8D</scope><scope>KR7</scope><scope>L7M</scope><scope>1XC</scope><orcidid>https://orcid.org/0000-0002-7697-3605</orcidid></search><sort><creationdate>201401</creationdate><title>Sedimentation patterns on a cold-water coral mound off Mauritania</title><author>Eisele, Markus ; 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Part 2. Topical studies in oceanography</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Eisele, Markus</au><au>Frank, Norbert</au><au>Wienberg, Claudia</au><au>Titschack, Jürgen</au><au>Mienis, Furu</au><au>Beuck, Lydia</au><au>Tisnerat-Laborde, Nadine</au><au>Hebbeln, Dierk</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Sedimentation patterns on a cold-water coral mound off Mauritania</atitle><jtitle>Deep-sea research. Part 2. Topical studies in oceanography</jtitle><date>2014-01</date><risdate>2014</risdate><volume>99</volume><spage>307</spage><epage>315</epage><pages>307-315</pages><issn>0967-0645</issn><eissn>1879-0100</eissn><abstract>An unconformity-bound glacial sequence (135cm thick) of a coral-bearing sediment core collected from the flank of a cold-water coral mound in the Banda Mound Province off Mauritania was analysed. In order to study the relation between coral framework growth and its filling by hemipelagic sediments, U-series dates obtained from the cold-water coral species Lophelia pertusa were compared to 14C dates of planktonic foraminifera of the surrounding matrix sediments. The coral ages, ranging from 45.1 to 32.3kaBP, exhibit no clear depositional trend, while on the other hand the 14C dates of the matrix sediment provide ages within a much narrower time window of <3000yrs (34.6–31.8calkaBP), corresponding to the latest phase of the coral growth period. In addition, high-resolution computer tomography data revealed a subdivision of the investigated sediment package into three distinct parts, defined by the portion and fragmentation of corals and associated macrofauna as well as in the density of the matrix sediments. Grain size spectra obtained on the matrix sediments show a homogeneous pattern throughout the core sediment package, with minor variations. These features are interpreted as indicators of redeposition. Based on the observed structures and the dating results, the sediments were interpreted as deposits of a mass wasting event, namely a debris flow. During this event, the sediment unit must have been entirely mixed; resulting in averaging of the foraminifera ages from the whole unit and giving randomly distributed coral ages. In this context, for the first time mass wasting is proposed to be a substantial process of mound progradation by exporting material from the mound top to the flanks. Hence, it may not only be an erosional feature but also widening the base of the mound, thus allowing further vertical mound growth.
•Cold-water coral mound formation is mainly influenced by the baffling of fine grained material within a coral framework.•Mass wasting appears to be an important mound progradation process.•Even heavily reworked sediments contain valuable information on the original mound aggradation processes.</abstract><cop>Kidlington</cop><pub>Elsevier Ltd</pub><doi>10.1016/j.dsr2.2013.07.004</doi><tpages>9</tpages><orcidid>https://orcid.org/0000-0002-7697-3605</orcidid></addata></record> |
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| subjects | Age Baffling effect Cold-water coral mound Continental interfaces, environment Corals Density Deposition Earth sciences Earth, ocean, space Exact sciences and technology External geophysics Flanks Lophelia pertusa Marine and continental quaternary Marine geology Mass wasting Mauritania Mound progradation Ocean, Atmosphere Packages Physics of the oceans Sciences of the Universe Sedimentation Sediments Surficial geology |
| title | Sedimentation patterns on a cold-water coral mound off Mauritania |
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