Zircon LA-ICPMS Geochronology of the Cornubian Batholith, SW England

Zircon LA-ICPMS Geochronology of the Cornubian Batholith, SW England

Bibliographic Details
Main Author: Neace, Erika R.
Language:English
Published: Ohio University / OhioLINK 2015
Subjects:
Geological
Geology
Zircon inheritance
LA-ICPMS
Cornubian Batholith
zircon geochronology
U-Pb
U-Pb-Th
Online Access:http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1448912006
id ndltd-OhioLink-oai-etd.ohiolink.edu-ohiou1448912006
record_format oai_dc
spelling ndltd-OhioLink-oai-etd.ohiolink.edu-ohiou14489120062021-08-03T06:34:09Z Zircon LA-ICPMS Geochronology of the Cornubian Batholith, SW England Neace, Erika R. Geological Geology Zircon inheritance LA-ICPMS Cornubian Batholith zircon geochronology U-Pb U-Pb-Th Available 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 are 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. 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. Submitted for publication in Tectonophysics as “Neace, E.R., Nance, R.D., Murphy, J.B., Lancaster, P., Shail, R.K. (2016). Zircon LA-ICPMS geochronology of the Cornubian Batholith, SW England.” 2015 English text Ohio University / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1448912006 http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1448912006 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws.
collection NDLTD
language English
sources NDLTD
topic Geological
Geology
Zircon inheritance
LA-ICPMS
Cornubian Batholith
zircon geochronology
U-Pb
U-Pb-Th
spellingShingle Geological
Geology
Zircon inheritance
LA-ICPMS
Cornubian Batholith
zircon geochronology
U-Pb
U-Pb-Th
Neace, Erika R.
Zircon LA-ICPMS Geochronology of the Cornubian Batholith, SW England
author Neace, Erika R.
author_facet Neace, Erika R.
author_sort Neace, Erika R.
title Zircon LA-ICPMS Geochronology of the Cornubian Batholith, SW England
title_short Zircon LA-ICPMS Geochronology of the Cornubian Batholith, SW England
title_full Zircon LA-ICPMS Geochronology of the Cornubian Batholith, SW England
title_fullStr Zircon LA-ICPMS Geochronology of the Cornubian Batholith, SW England
title_full_unstemmed Zircon LA-ICPMS Geochronology of the Cornubian Batholith, SW England
title_sort zircon la-icpms geochronology of the cornubian batholith, sw england
publisher Ohio University / OhioLINK
publishDate 2015
url http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1448912006
work_keys_str_mv AT neaceerikar zirconlaicpmsgeochronologyofthecornubianbatholithswengland
_version_ 1719439298125627392

Similar Items