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Contrasting Granite Metallogeny through the Zircon Record: A Case Study from Myanmar

Granitoid-hosted mineral deposits are major global sources of a number of economically important metals. The fundamental controls on magma metal fertility are tectonic setting, the nature of source rocks, and magma differentiation. A clearer understanding of these petrogenetic processes has been for...

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Autores principales: Gardiner, Nicholas J., Hawkesworth, Chris J., Robb, Laurence J., Whitehouse, Martin J., Roberts, Nick M. W., Kirkland, Christopher L., Evans, Noreen J.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5429697/
https://www.ncbi.nlm.nih.gov/pubmed/28389635
http://dx.doi.org/10.1038/s41598-017-00832-2
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author Gardiner, Nicholas J.
Hawkesworth, Chris J.
Robb, Laurence J.
Whitehouse, Martin J.
Roberts, Nick M. W.
Kirkland, Christopher L.
Evans, Noreen J.
author_facet Gardiner, Nicholas J.
Hawkesworth, Chris J.
Robb, Laurence J.
Whitehouse, Martin J.
Roberts, Nick M. W.
Kirkland, Christopher L.
Evans, Noreen J.
author_sort Gardiner, Nicholas J.
collection PubMed
description Granitoid-hosted mineral deposits are major global sources of a number of economically important metals. The fundamental controls on magma metal fertility are tectonic setting, the nature of source rocks, and magma differentiation. A clearer understanding of these petrogenetic processes has been forged through the accessory mineral zircon, which has considerable potential in metallogenic studies. We present an integrated zircon isotope (U-Pb, Lu-Hf, O) and trace element dataset from the paired Cu-Au (copper) and Sn-W (tin) magmatic belts in Myanmar. Copper arc zircons have juvenile εHf (+7.6 to +11.5) and mantle-like δ(18)O (5.2–5.5‰), whereas tin belt zircons have low εHf (−7 to −13) and heavier δ(18)O (6.2–7.7‰). Variations in zircon Hf and U/Yb reaffirm that tin belt magmas contain greater crustal contributions than copper arc rocks. Links between whole-rock Rb/Sr and zircon Eu/Eu* highlight that the latter can monitor magma fractionation in these systems. Zircon Ce/Ce* and Eu/Eu* are sensitive to redox and fractionation respectively, and here are used to evaluate zircon sensitivity to the metallogenic affinity of their host rock. Critical contents of Sn in granitic magmas, which may be required for the development of economic tin deposits, are marked by zircon Eu/Eu* values of ca. ≤0.08.
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spelling pubmed-54296972017-05-15 Contrasting Granite Metallogeny through the Zircon Record: A Case Study from Myanmar Gardiner, Nicholas J. Hawkesworth, Chris J. Robb, Laurence J. Whitehouse, Martin J. Roberts, Nick M. W. Kirkland, Christopher L. Evans, Noreen J. Sci Rep Article Granitoid-hosted mineral deposits are major global sources of a number of economically important metals. The fundamental controls on magma metal fertility are tectonic setting, the nature of source rocks, and magma differentiation. A clearer understanding of these petrogenetic processes has been forged through the accessory mineral zircon, which has considerable potential in metallogenic studies. We present an integrated zircon isotope (U-Pb, Lu-Hf, O) and trace element dataset from the paired Cu-Au (copper) and Sn-W (tin) magmatic belts in Myanmar. Copper arc zircons have juvenile εHf (+7.6 to +11.5) and mantle-like δ(18)O (5.2–5.5‰), whereas tin belt zircons have low εHf (−7 to −13) and heavier δ(18)O (6.2–7.7‰). Variations in zircon Hf and U/Yb reaffirm that tin belt magmas contain greater crustal contributions than copper arc rocks. Links between whole-rock Rb/Sr and zircon Eu/Eu* highlight that the latter can monitor magma fractionation in these systems. Zircon Ce/Ce* and Eu/Eu* are sensitive to redox and fractionation respectively, and here are used to evaluate zircon sensitivity to the metallogenic affinity of their host rock. Critical contents of Sn in granitic magmas, which may be required for the development of economic tin deposits, are marked by zircon Eu/Eu* values of ca. ≤0.08. Nature Publishing Group UK 2017-04-07 /pmc/articles/PMC5429697/ /pubmed/28389635 http://dx.doi.org/10.1038/s41598-017-00832-2 Text en © The Author(s) 2017 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Gardiner, Nicholas J.
Hawkesworth, Chris J.
Robb, Laurence J.
Whitehouse, Martin J.
Roberts, Nick M. W.
Kirkland, Christopher L.
Evans, Noreen J.
Contrasting Granite Metallogeny through the Zircon Record: A Case Study from Myanmar
title Contrasting Granite Metallogeny through the Zircon Record: A Case Study from Myanmar
title_full Contrasting Granite Metallogeny through the Zircon Record: A Case Study from Myanmar
title_fullStr Contrasting Granite Metallogeny through the Zircon Record: A Case Study from Myanmar
title_full_unstemmed Contrasting Granite Metallogeny through the Zircon Record: A Case Study from Myanmar
title_short Contrasting Granite Metallogeny through the Zircon Record: A Case Study from Myanmar
title_sort contrasting granite metallogeny through the zircon record: a case study from myanmar
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5429697/
https://www.ncbi.nlm.nih.gov/pubmed/28389635
http://dx.doi.org/10.1038/s41598-017-00832-2
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