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dc.contributor.authorVolante, Silvia
dc.contributor.authorCollins, Bill
dc.contributor.authorBlereau, E.
dc.contributor.authorPourteau, Amaury
dc.contributor.authorSpencer, Christopher
dc.contributor.authorEvans, Noreen
dc.contributor.authorBarrote, Vitor
dc.contributor.authorNordsvan, A.R.
dc.contributor.authorLi, Zheng-Xiang
dc.contributor.authorLi, J.
dc.date.accessioned2023-02-21T04:02:47Z
dc.date.available2023-02-21T04:02:47Z
dc.date.issued2020
dc.identifier.citationVolante, S. and Collins, W.J. and Blereau, E. and Pourteau, A. and Spencer, C. and Evans, N.J. and Barrote, V. et al. 2020. Reassessing zircon-monazite thermometry with thermodynamic modelling: insights from the Georgetown igneous complex, NE Australia. Contributions to Mineralogy and Petrology. 175 (12): ARTN 110.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/90591
dc.identifier.doi10.1007/s00410-020-01752-7
dc.description.abstract

Accessory mineral thermometry and thermodynamic modelling are fundamental tools for constraining petrogenetic models of granite magmatism. U–Pb geochronology on zircon and monazite from S-type granites emplaced within a semi-continuous, whole-crust section in the Georgetown Inlier (GTI), NE Australia, indicates synchronous crystallisation at 1550 Ma. Zircon saturation temperature (Tzr) and titanium-in-zircon thermometry (T(Ti–zr)) estimate magma temperatures of ~ 795 ± 41 °C (Tzr) and ~ 845 ± 46 °C (T(Ti-zr)) in the deep crust, ~ 735 ± 30 °C (Tzr) and ~ 785 ± 30 °C (T(Ti-zr)) in the middle crust, and ~ 796 ± 45 °C (Tzr) and ~ 850 ± 40 °C (T(Ti-zr)) in the upper crust. The differing averages reflect ambient temperature conditions (Tzr) within the magma chamber, whereas the higher T(Ti-zr) values represent peak conditions of hotter melt injections. Assuming thermal equilibrium through the crust and adiabatic ascent, shallower magmas contained 4 wt% H2O, whereas deeper melts contained 7 wt% H2O. Using these H2O contents, monazite saturation temperature (Tmz) estimates agree with Tzr values. Thermodynamic modelling indicates that plagioclase, garnet and biotite were restitic phases, and that compositional variation in the GTI suites resulted from entrainment of these minerals in silicic (74–76 wt% SiO2) melts. At inferred emplacement P–T conditions of 5 kbar and 730 °C, additional H2O is required to produce sufficient melt with compositions similar to the GTI granites. Drier and hotter magmas required additional heat to raise adiabatically to upper-crustal levels. S-type granites are low-T mushes of melt and residual phases that stall and equilibrate in the middle crust, suggesting that discussions on the unreliability of zircon-based thermometers should be modulated.

dc.languageEnglish
dc.publisherSPRINGER
dc.relation.sponsoredbyhttp://purl.org/au-research/grants/arc/FL150100133
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectScience & Technology
dc.subjectPhysical Sciences
dc.subjectGeochemistry & Geophysics
dc.subjectMineralogy
dc.subjectZircon and monazite thermometry
dc.subjectWater content
dc.subjectGranitic melts
dc.subjectComplete crustal section
dc.subjectPhase equilibria diagrams
dc.subjectLACHLAN FOLD BELT
dc.subjectS-TYPE GRANITES
dc.subjectTI-IN-ZIRCON
dc.subjectU-PB
dc.subjectPHASE-EQUILIBRIA
dc.subjectWATER CONTENTS
dc.subjectTEMPERATURE
dc.subjectSATURATION
dc.subjectBEARING
dc.subjectINLIER
dc.titleReassessing zircon-monazite thermometry with thermodynamic modelling: insights from the Georgetown igneous complex, NE Australia
dc.typeJournal Article
dcterms.source.volume175
dcterms.source.number12
dcterms.source.issn0010-7999
dcterms.source.titleContributions to Mineralogy and Petrology
dc.date.updated2023-02-21T04:02:46Z
curtin.departmentSchool of Earth and Planetary Sciences (EPS)
curtin.accessStatusOpen access
curtin.facultyFaculty of Science and Engineering
curtin.contributor.orcidSpencer, Christopher [0000-0003-4264-3701]
curtin.contributor.orcidEvans, Noreen [0000-0002-7615-8328]
curtin.contributor.orcidLi, Zheng-Xiang [0000-0003-4350-5976]
curtin.contributor.orcidVolante, Silvia [0000-0001-8807-4087]
curtin.contributor.researcheridSpencer, Christopher [N-8076-2015]
curtin.contributor.researcheridEvans, Noreen [C-3275-2013]
curtin.contributor.researcheridLi, Zheng-Xiang [B-8827-2008]
curtin.identifier.article-numberARTN 110
dcterms.source.eissn1432-0967
curtin.contributor.scopusauthoridCollins, Bill [35580107700]
curtin.contributor.scopusauthoridPourteau, Amaury [37075640100]
curtin.contributor.scopusauthoridSpencer, Christopher [37033040800] [57194577570]
curtin.contributor.scopusauthoridEvans, Noreen [7401559218]
curtin.contributor.scopusauthoridLi, Zheng-Xiang [57192954386] [57198889498] [7409074764]


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