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Unravelling the Neoproterozoic accretionary history of Oman, using an array of isotopic systems in zircon

View ORCID ProfileM. L. Blades, View ORCID ProfileB. L. Alessio, View ORCID ProfileA. S. Collins, View ORCID ProfileJ. Foden, J. L. Payne, View ORCID ProfileS. Glorie, P. Holden, B. Thorpe and S. Al-Khirbash
Journal of the Geological Society, 177, 357-378, 22 November 2019, https://doi.org/10.1144/jgs2018-125
M. L. Blades
1Centre for Tectonics, Resources and Exploration (TRaX), Department of Earth Sciences, The University of Adelaide, Adelaide, SA 5005, Australia
Roles: [Conceptualization (Lead)], [Data curation (Lead)], [Formal analysis (Lead)], [Methodology (Lead)], [Visualization (Lead)], [Writing - Original Draft (Lead)], [Writing - Review & Editing (Lead)]
  • Find this author on Google Scholar
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  • ORCID record for M. L. Blades
  • For correspondence: [email protected]
B. L. Alessio
1Centre for Tectonics, Resources and Exploration (TRaX), Department of Earth Sciences, The University of Adelaide, Adelaide, SA 5005, Australia
Roles: [Conceptualization (Supporting)], [Data curation (Supporting)], [Methodology (Supporting)], [Writing - Review & Editing (Supporting)]
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  • ORCID record for B. L. Alessio
A. S. Collins
1Centre for Tectonics, Resources and Exploration (TRaX), Department of Earth Sciences, The University of Adelaide, Adelaide, SA 5005, Australia
Roles: [Conceptualization (Supporting)], [Formal analysis (Supporting)], [Funding acquisition (Lead)], [Investigation (Supporting)], [Methodology (Supporting)], [Project administration (Equal)], [Resources (Lead)], [Supervision (Lead)], [Validation (Equal)], [Writing - Review & Editing (Equal)]
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  • ORCID record for A. S. Collins
J. Foden
1Centre for Tectonics, Resources and Exploration (TRaX), Department of Earth Sciences, The University of Adelaide, Adelaide, SA 5005, Australia
Roles: [Conceptualization (Supporting)], [Data curation (Supporting)], [Supervision (Supporting)], [Writing - Review & Editing (Supporting)]
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J. L. Payne
2Centre for Tectonics, Resources and Exploration (TRaX), School of Built and Natural Environments, University of South Australia, Adelaide, SA 5001, Australia
Roles: [Conceptualization (Supporting)], [Data curation (Supporting)], [Methodology (Supporting)], [Writing - Review & Editing (Supporting)]
  • Find this author on Google Scholar
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S. Glorie
1Centre for Tectonics, Resources and Exploration (TRaX), Department of Earth Sciences, The University of Adelaide, Adelaide, SA 5005, Australia
Roles: [Conceptualization (Supporting)], [Supervision (Supporting)], [Writing - Review & Editing (Supporting)]
  • Find this author on Google Scholar
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  • ORCID record for S. Glorie
P. Holden
4Research School of Earth Sciences, The Australian National University, Canberra, ACT 0200, Australia
Roles: [Data curation (Supporting)], [Writing - Review & Editing (Supporting)]
  • Find this author on Google Scholar
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B. Thorpe
1Centre for Tectonics, Resources and Exploration (TRaX), Department of Earth Sciences, The University of Adelaide, Adelaide, SA 5005, Australia
Roles: [Data curation (Supporting)]
  • Find this author on Google Scholar
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S. Al-Khirbash
3Sultan Qaboos University, Muscat, Sultanate of Oman
Roles: [Project administration (Supporting)], [Resources (Supporting)], [Writing - Review & Editing (Supporting)]
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Abstract

The Omani basement is a critical window into the Neoproterozoic tectonic geography of the Mozambique Ocean and the amalgamation of Gondwana. It is located east of the juvenile arc terranes of the Arabian–Nubian Shield, yet the relationship between the two is not well understood. Magmatic and detrital zircon samples were analysed from four main basement terranes: Mirbat, the Huqf, Jebel Ja'alan and Al Jobah. The U–Pb (zircon) ages from igneous samples give ages between 838 and 765 Ma. The Lu–Hf and oxygen isotopes show that the zircons are juvenile (ɛHf(t) values 10.5–8.7), with low δ18O values (c. 2–6‰). Detritus from sediments in Mirbat, the southernmost basement outcrop, preserves a main age peak at c. 786 Ma, with Lu–Hf between +6.05 and +12.64. Lu–Hf isotopic data for Proterozoic detrital zircons from Jebel Ja'alan suggest that this region was depositionally connected to a source yielding both evolved Tonian and Neoarchean to Paleoproterozoic detritus. These sources could correlate to the terranes in India and South China, which record similarly low δ18O values. These data support a model in which Oman formed in its own tectonic domain, accreting onto the Neoproterozoic active margin of a continent.

Supplementary material: All U–Pb, hafnium and oxygen data, and figures including all weighted average plots and initial 176Hf/177Hf v. 206Pb/238U age to aid in identifying Pb-loss in the data are available at https://doi.org/10.6084/m9.figshare.c.4682363

  • © 2019 The Author(s). Published by The Geological Society of London. All rights reserved
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Journal of the Geological Society: 177 (2)
Journal of the Geological Society
Volume 177, Issue 2
March 2020
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Unravelling the Neoproterozoic accretionary history of Oman, using an array of isotopic systems in zircon

M. L. Blades, B. L. Alessio, A. S. Collins, J. Foden, J. L. Payne, S. Glorie, P. Holden, B. Thorpe and S. Al-Khirbash
Journal of the Geological Society, 177, 357-378, 22 November 2019, https://doi.org/10.1144/jgs2018-125
M. L. Blades
1Centre for Tectonics, Resources and Exploration (TRaX), Department of Earth Sciences, The University of Adelaide, Adelaide, SA 5005, Australia
Roles: [Conceptualization (Lead)], [Data curation (Lead)], [Formal analysis (Lead)], [Methodology (Lead)], [Visualization (Lead)], [Writing - Original Draft (Lead)], [Writing - Review & Editing (Lead)]
  • Find this author on Google Scholar
  • Find this author on PubMed
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  • ORCID record for M. L. Blades
  • For correspondence: [email protected]
B. L. Alessio
1Centre for Tectonics, Resources and Exploration (TRaX), Department of Earth Sciences, The University of Adelaide, Adelaide, SA 5005, Australia
Roles: [Conceptualization (Supporting)], [Data curation (Supporting)], [Methodology (Supporting)], [Writing - Review & Editing (Supporting)]
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
  • ORCID record for B. L. Alessio
A. S. Collins
1Centre for Tectonics, Resources and Exploration (TRaX), Department of Earth Sciences, The University of Adelaide, Adelaide, SA 5005, Australia
Roles: [Conceptualization (Supporting)], [Formal analysis (Supporting)], [Funding acquisition (Lead)], [Investigation (Supporting)], [Methodology (Supporting)], [Project administration (Equal)], [Resources (Lead)], [Supervision (Lead)], [Validation (Equal)], [Writing - Review & Editing (Equal)]
  • Find this author on Google Scholar
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  • ORCID record for A. S. Collins
J. Foden
1Centre for Tectonics, Resources and Exploration (TRaX), Department of Earth Sciences, The University of Adelaide, Adelaide, SA 5005, Australia
Roles: [Conceptualization (Supporting)], [Data curation (Supporting)], [Supervision (Supporting)], [Writing - Review & Editing (Supporting)]
  • Find this author on Google Scholar
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  • ORCID record for J. Foden
J. L. Payne
2Centre for Tectonics, Resources and Exploration (TRaX), School of Built and Natural Environments, University of South Australia, Adelaide, SA 5001, Australia
Roles: [Conceptualization (Supporting)], [Data curation (Supporting)], [Methodology (Supporting)], [Writing - Review & Editing (Supporting)]
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
S. Glorie
1Centre for Tectonics, Resources and Exploration (TRaX), Department of Earth Sciences, The University of Adelaide, Adelaide, SA 5005, Australia
Roles: [Conceptualization (Supporting)], [Supervision (Supporting)], [Writing - Review & Editing (Supporting)]
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
  • ORCID record for S. Glorie
P. Holden
4Research School of Earth Sciences, The Australian National University, Canberra, ACT 0200, Australia
Roles: [Data curation (Supporting)], [Writing - Review & Editing (Supporting)]
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
B. Thorpe
1Centre for Tectonics, Resources and Exploration (TRaX), Department of Earth Sciences, The University of Adelaide, Adelaide, SA 5005, Australia
Roles: [Data curation (Supporting)]
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site
S. Al-Khirbash
3Sultan Qaboos University, Muscat, Sultanate of Oman
Roles: [Project administration (Supporting)], [Resources (Supporting)], [Writing - Review & Editing (Supporting)]
  • Find this author on Google Scholar
  • Find this author on PubMed
  • Search for this author on this site

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Unravelling the Neoproterozoic accretionary history of Oman, using an array of isotopic systems in zircon

M. L. Blades, B. L. Alessio, A. S. Collins, J. Foden, J. L. Payne, S. Glorie, P. Holden, B. Thorpe and S. Al-Khirbash
Journal of the Geological Society, 177, 357-378, 22 November 2019, https://doi.org/10.1144/jgs2018-125
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