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Neace Erika Accepted Thesis 11-30-15 Fa15.pdf (4.1 MB)
ETD Abstract Container
Abstract Header
Zircon LA-ICPMS Geochronology of the Cornubian Batholith, SW England
Author Info
Neace, Erika R.
ORCID® Identifier
http://orcid.org/0000-0002-6391-1026
Permalink:
http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1448912006
Abstract Details
Year and Degree
2015, Master of Science (MS), Ohio University, Geological Sciences (Arts and Sciences).
Abstract
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.”
Committee
Richard Nance (Advisor)
Craig Grimes (Committee Member)
Douglas Green (Committee Member)
Pages
80 p.
Subject Headings
Geological
;
Geology
Keywords
Zircon inheritance
;
LA-ICPMS
;
Cornubian Batholith
;
zircon geochronology
;
U-Pb
;
U-Pb-Th
Recommended Citations
Refworks
EndNote
RIS
Mendeley
Citations
Neace, E. R. (2015).
Zircon LA-ICPMS Geochronology of the Cornubian Batholith, SW England
[Master's thesis, Ohio University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1448912006
APA Style (7th edition)
Neace, Erika.
Zircon LA-ICPMS Geochronology of the Cornubian Batholith, SW England.
2015. Ohio University, Master's thesis.
OhioLINK Electronic Theses and Dissertations Center
, http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1448912006.
MLA Style (8th edition)
Neace, Erika. "Zircon LA-ICPMS Geochronology of the Cornubian Batholith, SW England." Master's thesis, Ohio University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1448912006
Chicago Manual of Style (17th edition)
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Document number:
ohiou1448912006
Download Count:
1,112
Copyright Info
© 2015, all rights reserved.
This open access ETD is published by Ohio University and OhioLINK.