High precision zircon U-Pb data for plutonic rocks from the Masirah and Ra's Madrakah ophiolites, South East Oman
Zircon U-Pb isotope data are presented for eight plutonic rocks from the Masirah ophiolite and one plutonic rock from the Ra's Madrakah ophiolite (south east Oman). These data constrain the age of formation of the two ophiolite nappes exposed on Masirah Island (early Cretaceous), whereas two intrusions with younger ages (late Cretaceous) overlap with the proposed emplacement age of the ophiolite. The data cover two sites in the Masirah Lower Nappe, two sites in the Masirah Upper Nappe (on Masirah Island, off the SE coast of Oman) and one site on Ra's Madrakah (on the mainland of Oman). The interpretation and discussion of these data form part of a manuscript submitted to Geochemistry, Geophysics, Geosystems. Data collection was done using chemical abrasion isotope dilution thermal ionisation mass spectrometry (CA-ID-TIMS) at the NERC Isotope Geosciences Laboratories at the British geological Survey, supported by NERC Isotope Geosciences Facilities award IP-1919-0619. This work resulted from a PhD project funded by NERC GW4+ DTP grant NE/L002434/1.
nonGeographicDataset
https://webapps.bgs.ac.uk/services/ngdc/accessions/index.html#item183841
name: Data
function: download
https://doi.org/10.5285/3ba7bf8e-0118-4953-86b2-884028d062c4
name: Digital Object Identifier (DOI)
function: information
http://data.bgs.ac.uk/id/dataHolding/13608184
eng
geoscientificInformation
publication
2008-06-01
Ophiolites
Absolute age
Gondwana
Zircon
Uranium thorium lead dating
NGDC Deposited Data
Geochronology
Oceanic crust
revision
2022
NERC_DDC
2020-08-29
2022-04-11
creation
2024-02-02
notApplicable
Single zircons were isolated from the rock material using a Selfrag© and standard mineral separation techniques. To minimise the effect of Pb-loss, selected zircons were subjected to chemical abrasion to remove damaged parts of the crystal that likely experienced open-system behaviour (Mattinson, 2005). Uranium-Pb isotopic compositions of individual zircons were determined by ID-TIMS using a 202Pb-205Pb–233U–235U mixed-spike and data reduction was carried out using UPb Redux (McLean et al., 2011). All dates were corrected for initial Th/U disequilibrium and the uncertainties on the tracer and blank compositions were propagated into the measurement uncertainty. The blank contribution was determined by monitoring 204Pb and assuming all common Pb (Pbc) was blank-derived.
publication
2011
false
See the referenced specification
publication
2010-12-08
false
See http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:2010:323:0011:0102:EN:PDF
MS Excel
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University of Cardiff
Main Building, Park Place
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University of Cardiff
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University of Bristol
originator
British Geological Survey
Environmental Science Centre, Nicker Hill, Keyworth
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United Kingdom
0115 936 3143
0115 936 3276
distributor
British Geological Survey
Environmental Science Centre, Nicker Hill, Keyworth
NOTTINGHAM
NG12 5GG
United Kingdom
0115 936 3143
0115 936 3276
originator
British Geological Survey
distributor
British Geological Survey
pointOfContact
British Geological Survey
Environmental Science Centre,Keyworth
NOTTINGHAM
NG12 5GG
United Kingdom
+44 115 936 3100
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2025-01-18