The enigma of crustal zircons in upper-mantle rocks: Clues from the Tumut ophiolite, Southeast Australia

E.A. Belousova; J.M.G. Jiménez; I.T. Graham; W.L. Griffin; S.Y. O'Reilly; N.J. Pearson; Laure Martin; S. Craven; C. Talavera

doi:10.1130/G36231.1

The enigma of crustal zircons in upper-mantle rocks: Clues from the Tumut ophiolite, Southeast Australia

E.A. Belousova, J.M.G. Jiménez, I.T. Graham, W.L. Griffin, S.Y. O'Reilly, N.J. Pearson, Laure Martin, S. Craven, C. Talavera

Centre for Microscopy, Characterisation & Analysis

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77 Citations (Scopus)

Abstract

© 2015 Geological Society of America. We suggest a new explanation for the presence of crustally derived zircons in the upper-mantle rocks of ophiolitic complexes, as an alternative to subduction-related models. Integrated isotopic (U-Pb, Hf, and O isotopes) and trace-element data for zircons from the Tumut ophiolitic complex (southeast Australia) indicate that these grains are related to granitic magmatism and were introduced into the mantle rocks after their emplacement into the crust. These observations emphasize that a clear understanding of the origin of individual zircon populations and their relationship to the host rock is essential to interpretations of the tectonic history of upper-mantle rocks and the dynamics of crust-mantle interactions.

Original language	English
Pages (from-to)	119-122
Journal	Geology
Volume	43
Issue number	2
DOIs	https://doi.org/10.1130/G36231.1
Publication status	Published - 2015

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abstract = "{\textcopyright} 2015 Geological Society of America. We suggest a new explanation for the presence of crustally derived zircons in the upper-mantle rocks of ophiolitic complexes, as an alternative to subduction-related models. Integrated isotopic (U-Pb, Hf, and O isotopes) and trace-element data for zircons from the Tumut ophiolitic complex (southeast Australia) indicate that these grains are related to granitic magmatism and were introduced into the mantle rocks after their emplacement into the crust. These observations emphasize that a clear understanding of the origin of individual zircon populations and their relationship to the host rock is essential to interpretations of the tectonic history of upper-mantle rocks and the dynamics of crust-mantle interactions.",

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T1 - The enigma of crustal zircons in upper-mantle rocks: Clues from the Tumut ophiolite, Southeast Australia

AU - Belousova, E.A.

AU - Jiménez, J.M.G.

AU - Graham, I.T.

AU - Griffin, W.L.

AU - O'Reilly, S.Y.

AU - Pearson, N.J.

AU - Martin, Laure

AU - Craven, S.

AU - Talavera, C.

PY - 2015

Y1 - 2015

N2 - © 2015 Geological Society of America. We suggest a new explanation for the presence of crustally derived zircons in the upper-mantle rocks of ophiolitic complexes, as an alternative to subduction-related models. Integrated isotopic (U-Pb, Hf, and O isotopes) and trace-element data for zircons from the Tumut ophiolitic complex (southeast Australia) indicate that these grains are related to granitic magmatism and were introduced into the mantle rocks after their emplacement into the crust. These observations emphasize that a clear understanding of the origin of individual zircon populations and their relationship to the host rock is essential to interpretations of the tectonic history of upper-mantle rocks and the dynamics of crust-mantle interactions.

AB - © 2015 Geological Society of America. We suggest a new explanation for the presence of crustally derived zircons in the upper-mantle rocks of ophiolitic complexes, as an alternative to subduction-related models. Integrated isotopic (U-Pb, Hf, and O isotopes) and trace-element data for zircons from the Tumut ophiolitic complex (southeast Australia) indicate that these grains are related to granitic magmatism and were introduced into the mantle rocks after their emplacement into the crust. These observations emphasize that a clear understanding of the origin of individual zircon populations and their relationship to the host rock is essential to interpretations of the tectonic history of upper-mantle rocks and the dynamics of crust-mantle interactions.

U2 - 10.1130/G36231.1

DO - 10.1130/G36231.1

M3 - Article

SN - 0091-7613

VL - 43

SP - 119

EP - 122

JO - Geology

JF - Geology

IS - 2

ER -

The enigma of crustal zircons in upper-mantle rocks: Clues from the Tumut ophiolite, Southeast Australia

Abstract

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