The velocity structure of a fossil spreading centre in the Southwest Sub-basin, South China Sea

We present results from an ocean bottom seismometer experiment surveying the fossil spreading centre in the Southwest Sub‐basin of the South China Sea. The detailed velocity model shows that oceanic layer 2 exhibits across‐axis variations in thickness and velocity, whereas oceanic layer 3 displays a...

Full description

Saved in:
Bibliographic Details
Published in:Geological journal (Chichester, England) England), 2016-08, Vol.51 (S1), p.548-561
Main Authors: Zhang, Jie, Li, Jiabiao, Ruan, Aiguo, Wu, Zhenli, Yu, Zhiteng, Niu, Xiongwei, Ding, Weiwei
Format: Article
Language:English
Subjects:
crustal structure
fossil spreading centre
Marine
South China Sea
Southwest Sub-basin
wide-angle seismic refraction
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
cited_by cdi_FETCH-LOGICAL-c3608-56f169520a212a8789f74195cc167aadf81d260e00e6edbc908045042fbdf2143
cites cdi_FETCH-LOGICAL-c3608-56f169520a212a8789f74195cc167aadf81d260e00e6edbc908045042fbdf2143
container_end_page 561
container_issue S1
container_start_page 548
container_title Geological journal (Chichester, England)
container_volume 51
creator Zhang, Jie
Li, Jiabiao
Ruan, Aiguo
Wu, Zhenli
Yu, Zhiteng
Niu, Xiongwei
Ding, Weiwei
description We present results from an ocean bottom seismometer experiment surveying the fossil spreading centre in the Southwest Sub‐basin of the South China Sea. The detailed velocity model shows that oceanic layer 2 exhibits across‐axis variations in thickness and velocity, whereas oceanic layer 3 displays a variation in crustal thickness. A low‐angle (24°) SE‐dipping oceanic detachment fault is proposed to explain the anomalous structure on the NW side of the spreading centre, which exhibits uplifting of the upper mantle beneath a thinned oceanic crust. The inferred oceanic detachment fault was at its initial stage, localized within the basaltic crust and did not exhume lower crust. We suggest that the low‐velocity (7.6–7.9 km/s) body located within the upper mantle beneath the footwall of the detachment fault is caused by both mantle serpentinization and partial melting. The difference in crustal thickness in the Southwest Sub‐basin indicates that the magma supply varied in time and space during or even after the seafloor spreading. Compared with other fossil spreading ridges, the fossil spreading centre of the northeast Southwest Sub‐basin studied here represents a third type of fossil spreading ridge, characterized by a reduced melt supply at the waning stage of spreading and a strong post‐spreading magmatism. Copyright © 2016 John Wiley & Sons, Ltd.
doi_str_mv 10.1002/gj.2778
format article
fullrecord <record><control><sourceid>proquest_cross</sourceid><recordid>TN_cdi_proquest_miscellaneous_1819143622</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>4158740381</sourcerecordid><originalsourceid>FETCH-LOGICAL-c3608-56f169520a212a8789f74195cc167aadf81d260e00e6edbc908045042fbdf2143</originalsourceid><addsrcrecordid>eNp10N9LwzAQB_AgCs4p_gsBHxS085K2afuow80fYwqb-BiyNNkyazuT1rn_3owOHwSfcuQ-dxxfhE4J9AgAvZ4vezRJ0j3UIZBlAYEw2kcdgIT6OoZDdOTcEoAQiEgH8elC4S9VVNLUG-xq28i6sQpXGgusK-dMgd3KKpGbco6lKmvfNCWu_dikaurFWrkaT5pZMBPOlFftJ-4vTCnwRIljdKBF4dTJ7u2i18HdtH8fjJ6HD_2bUSBDBmkQM01YFlMQlFCRJmmmk4hksZSEJULkOiU5ZaAAFFP5TGaQQhRDRPUs15REYRddtHtXtvps_E38wzipikKUqmocJynJPGOUenr2hy6rxpb-uq0Ks5hBvF143ippfQpWab6y5kPYDSfAt0Hz-ZJvg_byspVrU6jNf4wPH3c6aLVxtfr-1cK-c5aESczfxkN-2x--PI0Z8EH4A9_Viuc</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>1813956054</pqid></control><display><type>article</type><title>The velocity structure of a fossil spreading centre in the Southwest Sub-basin, South China Sea</title><source>Wiley-Blackwell Journals</source><creator>Zhang, Jie ; Li, Jiabiao ; Ruan, Aiguo ; Wu, Zhenli ; Yu, Zhiteng ; Niu, Xiongwei ; Ding, Weiwei</creator><creatorcontrib>Zhang, Jie ; Li, Jiabiao ; Ruan, Aiguo ; Wu, Zhenli ; Yu, Zhiteng ; Niu, Xiongwei ; Ding, Weiwei</creatorcontrib><description>We present results from an ocean bottom seismometer experiment surveying the fossil spreading centre in the Southwest Sub‐basin of the South China Sea. The detailed velocity model shows that oceanic layer 2 exhibits across‐axis variations in thickness and velocity, whereas oceanic layer 3 displays a variation in crustal thickness. A low‐angle (24°) SE‐dipping oceanic detachment fault is proposed to explain the anomalous structure on the NW side of the spreading centre, which exhibits uplifting of the upper mantle beneath a thinned oceanic crust. The inferred oceanic detachment fault was at its initial stage, localized within the basaltic crust and did not exhume lower crust. We suggest that the low‐velocity (7.6–7.9 km/s) body located within the upper mantle beneath the footwall of the detachment fault is caused by both mantle serpentinization and partial melting. The difference in crustal thickness in the Southwest Sub‐basin indicates that the magma supply varied in time and space during or even after the seafloor spreading. Compared with other fossil spreading ridges, the fossil spreading centre of the northeast Southwest Sub‐basin studied here represents a third type of fossil spreading ridge, characterized by a reduced melt supply at the waning stage of spreading and a strong post‐spreading magmatism. Copyright © 2016 John Wiley &amp; Sons, Ltd.</description><identifier>ISSN: 0072-1050</identifier><identifier>EISSN: 1099-1034</identifier><identifier>DOI: 10.1002/gj.2778</identifier><identifier>CODEN: GELJA8</identifier><language>eng</language><publisher>Liverpool: Blackwell Publishing Ltd</publisher><subject>crustal structure ; fossil spreading centre ; Marine ; South China Sea ; Southwest Sub-basin ; wide-angle seismic refraction</subject><ispartof>Geological journal (Chichester, England), 2016-08, Vol.51 (S1), p.548-561</ispartof><rights>Copyright © 2016 John Wiley &amp; Sons, Ltd.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c3608-56f169520a212a8789f74195cc167aadf81d260e00e6edbc908045042fbdf2143</citedby><cites>FETCH-LOGICAL-c3608-56f169520a212a8789f74195cc167aadf81d260e00e6edbc908045042fbdf2143</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1002%2Fgj.2778$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1002%2Fgj.2778$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>315,786,790,27957,27958,50923,51032</link.rule.ids></links><search><creatorcontrib>Zhang, Jie</creatorcontrib><creatorcontrib>Li, Jiabiao</creatorcontrib><creatorcontrib>Ruan, Aiguo</creatorcontrib><creatorcontrib>Wu, Zhenli</creatorcontrib><creatorcontrib>Yu, Zhiteng</creatorcontrib><creatorcontrib>Niu, Xiongwei</creatorcontrib><creatorcontrib>Ding, Weiwei</creatorcontrib><title>The velocity structure of a fossil spreading centre in the Southwest Sub-basin, South China Sea</title><title>Geological journal (Chichester, England)</title><addtitle>Geol. J</addtitle><description>We present results from an ocean bottom seismometer experiment surveying the fossil spreading centre in the Southwest Sub‐basin of the South China Sea. The detailed velocity model shows that oceanic layer 2 exhibits across‐axis variations in thickness and velocity, whereas oceanic layer 3 displays a variation in crustal thickness. A low‐angle (24°) SE‐dipping oceanic detachment fault is proposed to explain the anomalous structure on the NW side of the spreading centre, which exhibits uplifting of the upper mantle beneath a thinned oceanic crust. The inferred oceanic detachment fault was at its initial stage, localized within the basaltic crust and did not exhume lower crust. We suggest that the low‐velocity (7.6–7.9 km/s) body located within the upper mantle beneath the footwall of the detachment fault is caused by both mantle serpentinization and partial melting. The difference in crustal thickness in the Southwest Sub‐basin indicates that the magma supply varied in time and space during or even after the seafloor spreading. Compared with other fossil spreading ridges, the fossil spreading centre of the northeast Southwest Sub‐basin studied here represents a third type of fossil spreading ridge, characterized by a reduced melt supply at the waning stage of spreading and a strong post‐spreading magmatism. Copyright © 2016 John Wiley &amp; Sons, Ltd.</description><subject>crustal structure</subject><subject>fossil spreading centre</subject><subject>Marine</subject><subject>South China Sea</subject><subject>Southwest Sub-basin</subject><subject>wide-angle seismic refraction</subject><issn>0072-1050</issn><issn>1099-1034</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2016</creationdate><recordtype>article</recordtype><recordid>eNp10N9LwzAQB_AgCs4p_gsBHxS085K2afuow80fYwqb-BiyNNkyazuT1rn_3owOHwSfcuQ-dxxfhE4J9AgAvZ4vezRJ0j3UIZBlAYEw2kcdgIT6OoZDdOTcEoAQiEgH8elC4S9VVNLUG-xq28i6sQpXGgusK-dMgd3KKpGbco6lKmvfNCWu_dikaurFWrkaT5pZMBPOlFftJ-4vTCnwRIljdKBF4dTJ7u2i18HdtH8fjJ6HD_2bUSBDBmkQM01YFlMQlFCRJmmmk4hksZSEJULkOiU5ZaAAFFP5TGaQQhRDRPUs15REYRddtHtXtvps_E38wzipikKUqmocJynJPGOUenr2hy6rxpb-uq0Ks5hBvF143ippfQpWab6y5kPYDSfAt0Hz-ZJvg_byspVrU6jNf4wPH3c6aLVxtfr-1cK-c5aESczfxkN-2x--PI0Z8EH4A9_Viuc</recordid><startdate>201608</startdate><enddate>201608</enddate><creator>Zhang, Jie</creator><creator>Li, Jiabiao</creator><creator>Ruan, Aiguo</creator><creator>Wu, Zhenli</creator><creator>Yu, Zhiteng</creator><creator>Niu, Xiongwei</creator><creator>Ding, Weiwei</creator><general>Blackwell Publishing Ltd</general><general>Wiley Subscription Services, Inc</general><scope>BSCLL</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7ST</scope><scope>7UA</scope><scope>C1K</scope><scope>F1W</scope><scope>H96</scope><scope>L.G</scope><scope>SOI</scope></search><sort><creationdate>201608</creationdate><title>The velocity structure of a fossil spreading centre in the Southwest Sub-basin, South China Sea</title><author>Zhang, Jie ; Li, Jiabiao ; Ruan, Aiguo ; Wu, Zhenli ; Yu, Zhiteng ; Niu, Xiongwei ; Ding, Weiwei</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c3608-56f169520a212a8789f74195cc167aadf81d260e00e6edbc908045042fbdf2143</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2016</creationdate><topic>crustal structure</topic><topic>fossil spreading centre</topic><topic>Marine</topic><topic>South China Sea</topic><topic>Southwest Sub-basin</topic><topic>wide-angle seismic refraction</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Zhang, Jie</creatorcontrib><creatorcontrib>Li, Jiabiao</creatorcontrib><creatorcontrib>Ruan, Aiguo</creatorcontrib><creatorcontrib>Wu, Zhenli</creatorcontrib><creatorcontrib>Yu, Zhiteng</creatorcontrib><creatorcontrib>Niu, Xiongwei</creatorcontrib><creatorcontrib>Ding, Weiwei</creatorcontrib><collection>Istex</collection><collection>CrossRef</collection><collection>Environment Abstracts</collection><collection>Water Resources Abstracts</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Aquatic Science &amp; Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy &amp; Non-Living Resources</collection><collection>Aquatic Science &amp; Fisheries Abstracts (ASFA) Professional</collection><collection>Environment Abstracts</collection><jtitle>Geological journal (Chichester, England)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Zhang, Jie</au><au>Li, Jiabiao</au><au>Ruan, Aiguo</au><au>Wu, Zhenli</au><au>Yu, Zhiteng</au><au>Niu, Xiongwei</au><au>Ding, Weiwei</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>The velocity structure of a fossil spreading centre in the Southwest Sub-basin, South China Sea</atitle><jtitle>Geological journal (Chichester, England)</jtitle><addtitle>Geol. J</addtitle><date>2016-08</date><risdate>2016</risdate><volume>51</volume><issue>S1</issue><spage>548</spage><epage>561</epage><pages>548-561</pages><issn>0072-1050</issn><eissn>1099-1034</eissn><coden>GELJA8</coden><notes>ArticleID:GJ2778</notes><notes>istex:202E23FC86A927445BDDD83D3FBBDB48110A70E1</notes><notes>National Basic Research Program of China - No. 2012CB417301</notes><notes>National Natural Science Foundation of China - No. 91028006; No. 91228205</notes><notes>ark:/67375/WNG-BCGPKN60-F</notes><notes>ObjectType-Article-1</notes><notes>SourceType-Scholarly Journals-1</notes><notes>ObjectType-Feature-2</notes><notes>content type line 23</notes><abstract>We present results from an ocean bottom seismometer experiment surveying the fossil spreading centre in the Southwest Sub‐basin of the South China Sea. The detailed velocity model shows that oceanic layer 2 exhibits across‐axis variations in thickness and velocity, whereas oceanic layer 3 displays a variation in crustal thickness. A low‐angle (24°) SE‐dipping oceanic detachment fault is proposed to explain the anomalous structure on the NW side of the spreading centre, which exhibits uplifting of the upper mantle beneath a thinned oceanic crust. The inferred oceanic detachment fault was at its initial stage, localized within the basaltic crust and did not exhume lower crust. We suggest that the low‐velocity (7.6–7.9 km/s) body located within the upper mantle beneath the footwall of the detachment fault is caused by both mantle serpentinization and partial melting. The difference in crustal thickness in the Southwest Sub‐basin indicates that the magma supply varied in time and space during or even after the seafloor spreading. Compared with other fossil spreading ridges, the fossil spreading centre of the northeast Southwest Sub‐basin studied here represents a third type of fossil spreading ridge, characterized by a reduced melt supply at the waning stage of spreading and a strong post‐spreading magmatism. Copyright © 2016 John Wiley &amp; Sons, Ltd.</abstract><cop>Liverpool</cop><pub>Blackwell Publishing Ltd</pub><doi>10.1002/gj.2778</doi><tpages>14</tpages></addata></record>
fulltext fulltext
identifier ISSN: 0072-1050
ispartof Geological journal (Chichester, England), 2016-08, Vol.51 (S1), p.548-561
issn 0072-1050
1099-1034
language eng
recordid cdi_proquest_miscellaneous_1819143622
source Wiley-Blackwell Journals
subjects crustal structure
fossil spreading centre
Marine
South China Sea
Southwest Sub-basin
wide-angle seismic refraction
title The velocity structure of a fossil spreading centre in the Southwest Sub-basin, South China Sea
url http://sfxeu10.hosted.exlibrisgroup.com/loughborough?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2024-09-27T17%3A15%3A02IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-proquest_cross&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=The%20velocity%20structure%20of%20a%20fossil%20spreading%20centre%20in%20the%20Southwest%20Sub-basin,%20South%20China%20Sea&rft.jtitle=Geological%20journal%20(Chichester,%20England)&rft.au=Zhang,%20Jie&rft.date=2016-08&rft.volume=51&rft.issue=S1&rft.spage=548&rft.epage=561&rft.pages=548-561&rft.issn=0072-1050&rft.eissn=1099-1034&rft.coden=GELJA8&rft_id=info:doi/10.1002/gj.2778&rft_dat=%3Cproquest_cross%3E4158740381%3C/proquest_cross%3E%3Cgrp_id%3Ecdi_FETCH-LOGICAL-c3608-56f169520a212a8789f74195cc167aadf81d260e00e6edbc908045042fbdf2143%3C/grp_id%3E%3Coa%3E%3C/oa%3E%3Curl%3E%3C/url%3E&rft_id=info:oai/&rft_pqid=1813956054&rft_id=info:pmid/&rfr_iscdi=true