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dc.contributor.authorGuan, Xiaoyi
dc.contributor.authorHatch, C
dc.date.accessioned2018-09-14T10:09:09Z
dc.date.issued2018-09-14
dc.identifier.issn2041-1723
dc.identifier.issn2041-1723
dc.identifier.other3770
dc.identifier.urihttp://hdl.handle.net/10026.1/12364
dc.descriptionNo embargo required.
dc.description.abstract

Lamprophyres represent hydrous alkaline mantle melts that are a unique source of information about the composition of continental lithosphere. Throughout southwest Britain, post-Variscan lamprophyres are (ultra)potassic with strong incompatible element enrichments. Here we show that they form two distinct groups in terms of their Sr and Nd isotopic compositions, occurring on either side of a postulated, hitherto unrecognized terrane boundary. Lamprophyres emplaced north of the boundary fall on the mantle array with εNd −1 to +1.6. Those south of the boundary are enriched in radiogenic Sr, have initial εNd values of −0.3 to −3.5, and are isotopically indistinguishable from similar-aged lamprophyres in Armorican massifs in Europe. We conclude that an Armorican terrane was juxtaposed against Avalonia well before the closure of the Variscan oceans and the formation of Pangea. The giant Cornubian Tin-Tungsten Ore Province and associated batholith can be accounted for by the fertility of Armorican lower crust and mantle lithosphere.

dc.format.extent0-0
dc.format.mediumElectronic
dc.languageen
dc.language.isoen
dc.publisherNature Research (part of Springer Nature)
dc.subject0403 Geology
dc.titleMapping a hidden terrane boundary in the mantle lithosphere with lamprophyres
dc.typejournal-article
dc.typeJournal Article
dc.typeResearch Support, Non-U.S. Gov't
plymouth.author-urlhttps://www.ncbi.nlm.nih.gov/pubmed/30217975
plymouth.issue1
plymouth.volume9
plymouth.publication-statusPublished online
plymouth.journalNature Communications
dc.identifier.doi10.1038/s41467-018-06253-7
plymouth.organisational-group/Plymouth
plymouth.organisational-group/Plymouth/Faculty of Science and Engineering
plymouth.organisational-group/Plymouth/REF 2021 Researchers by UoA
plymouth.organisational-group/Plymouth/REF 2021 Researchers by UoA/UoA07 Earth Systems and Environmental Sciences
dc.publisher.placeEngland
dcterms.dateAccepted2018-08-18
dc.rights.embargodate2019-11-26
dc.identifier.eissn2041-1723
dc.rights.embargoperiodNot known
rioxxterms.versionofrecord10.1038/s41467-018-06253-7
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserved
rioxxterms.licenseref.startdate2018-09-14
rioxxterms.typeJournal Article/Review


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