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Diversity in ruby geochemistry and its inclusions: intra- and inter- continental comparisons from Myanmar and Eastern Australia

Citation

Sutherland, FL and Zaw, K and Meffre, S and Thompson, Jay and Goemann, K and Thu, K and Nu, TT and Zin, MM and Harris, SJ, Diversity in ruby geochemistry and its inclusions: intra- and inter- continental comparisons from Myanmar and Eastern Australia, Minerals, 9, (1) Article 28. ISSN 2075-163X (2019) [Refereed Article]


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Copyright Statement

Copyright 2019 The Authors. Licensed under Creative Commons Attribution 4.0 International (CC BY 4.0) https://creativecommons.org/licenses/by/4.0/

DOI: doi:10.3390/min9010028

Abstract

Ruby in diverse geological settings leaves petrogenetic clues, in its zoning, inclusions, trace elements and oxygen isotope values. Rock-hosted and isolated crystals are compared from Myanmar, SE Asia, and New SouthWales, East Australia. Myanmar ruby typifies metasomatized and metamorphic settings, while East Australian ruby xenocrysts are derived from basalts that tapped underlying fold belts. The respective suites include homogeneous ruby; bi-colored inner (violet blue) and outer (red) zoned ruby; ruby-sapphirine-spinel composites; pink to red grains and multi-zoned crystals of red-pink-white-violet (core to rim). Ruby ages were determined by using U-Pb isotopes in titanite inclusions (Thurein Taung; 32.4 Ma) and zircon inclusions (Mong Hsu; 23.9 Ma) and basalt dating in NSW, >60–40 Ma. Trace element oxide plots suggest marble sources for Thurein Taung and Mong Hsu ruby and ultramafic-mafic sources for Mong Hsu (dark cores). NSW rubies suggest metasomatic (Barrington Tops), ultramafic to mafic (Macquarie River) and metasomatic-magmatic (New England) sources. A previous study showed that Cr/Ga vs. Fe/(V + Ti) plots separate Mong Hsu ruby from other ruby fields, but did not test Mogok ruby. Thurein Taung ruby, tested here, plotted separately to Mong Hsu ruby. A Fe-Ga/Mg diagram splits ruby suites into various fields (Ga/Mg < 3), except for magmatic input into rare Mogok and Australian ruby (Ga/Mg > 6). The diverse results emphasize ruby’s potential for geographic typing.

Item Details

Item Type:Refereed Article
Keywords:ruby, Mogok, Mong Hsu, New South Wales, trace elements, LA-ICP-MS analysis, inclusions, U–Pb age-dating, genetic diversity, geographic typing
Research Division:Earth Sciences
Research Group:Geology
Research Field:Mineralogy and crystallography
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the earth sciences
UTAS Author:Zaw, K (Professor Khin Zaw)
UTAS Author:Meffre, S (Dr Sebastien Meffre)
UTAS Author:Thompson, Jay (Mr Jay Thompson)
UTAS Author:Goemann, K (Dr Karsten Goemann)
ID Code:136851
Year Published:2019
Web of Science® Times Cited:8
Deposited By:CODES ARC
Deposited On:2020-01-20
Last Modified:2020-05-21
Downloads:5 View Download Statistics

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