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dc.contributor.authorNeace, ER
dc.contributor.authorNance, RD
dc.contributor.authorMurphy, JB
dc.contributor.authorLancaster, PJ
dc.contributor.authorShail, RK
dc.date.accessioned2016-04-18T07:38:40Z
dc.date.issued2016-04-13
dc.description.abstractAvailable U-Pb age data for the Cornubian Batholith of SW England is based almost entirely on monazite and xenotime, and very little zircon U-Pb age data has been published. As a result, no zircon inheritance data is available for the batholith, by which the nature of the unexposed basement of the Rhenohercynian Zone in SW England might be constrained. Zircon LA-ICPMS data for the Cornubian Batholith provides Concordia ages (Bodmin Moor granite: 316 ± 4 Ma, Carnmenellis granite: 313 ± 3 Ma, Dartmoor granite: ~ 310 Ma, St. Austell granite: 305 ± 5 Ma, and Land's End granite: 300 ± 5 Ma) that are consistently 20–30 Ma older than previously published emplacement ages for the batholith and unrealistic in terms of geologic relative age relationships with respect to the country rock. This discrepancy is likely as a consequence of minor pre-granitic Pb inheritance. Several of the batholith's granite plutons contain a component of late-Devonian inheritance that may record rift-related, lower crustal melting or arc-related magmatism associated with subduction of the Rheic Ocean. In addition, the older granites likely contain Mesoproterozoic inheritance, although the highly discordant nature of the Mesoproterozoic ages precludes their use in assigning an affinity to the Rhenohercynian basement in SW England.en_GB
dc.description.sponsorshipThis project was supported by the Department of Geological Sciences at Ohio University and by NSERC (Canada) through Discovery grants to JBM. Thanks are also extended to the faculty and staff in the School of Earth and Environmental Sciences at the University of Portsmouth, the British Geological Survey, and the Department of Earth Systems Science at Morehead State University for the use of their facilities.en_GB
dc.identifier.citationAvailable online 13 April 2016en_GB
dc.identifier.doi10.1016/j.tecto.2016.04.002
dc.identifier.urihttp://hdl.handle.net/10871/21125
dc.language.isoenen_GB
dc.publisherElsevieren_GB
dc.relation.urlhttp://www.sciencedirect.com/science/article/pii/S0040195116300464en_GB
dc.rights.embargoreasonPublisher's policy.en_GB
dc.rightsThis is the author accepted manuscript. The final version is available from Elsevier via the DOI in this record.en_GB
dc.subjectZircon geochronologyen_GB
dc.subjectCornubian Batholithen_GB
dc.titleZircon LA-ICPMS geochronology of the Cornubian Batholith, SW Englanden_GB
dc.typeArticleen_GB
dc.identifier.issn0040-1951
dc.descriptionAccepteden_GB
dc.descriptionArticleen_GB
dc.identifier.journalTectonophysicsen_GB


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