What question did this study set out to answer?

To determine whether integrating zircon crystal morphology with in situ trace element, geochronological, and hafnium isotope data can model magma mixing and petrogenesis in granitic rocks.

October 26, 2005Journal of PetrologyOpen Access

Zircon Crystal Morphology, Trace Element Signatures and Hf Isotope Composition as a Tool for Petrogenetic Modelling: Examples From Eastern Australian Granitoids

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To determine whether integrating zircon crystal morphology with in situ trace element, geochronological, and hafnium isotope data can model magma mixing and petrogenesis in granitic rocks.
Examined magmatic zircon crystals from I- and S-type granitoids in Eastern Australia, including the Kosciusko tonalite, Berridale adamellite, and Dundee rhyodacite ignimbrite.
Conducted in situ laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) to measure trace elements, U-Pb ages, and Hf isotopic compositions alongside morphological observations.
Morphological variations within individual zircon crystals and across populations directly correlate with shifts in trace element and Hf isotope signatures, reflecting progressive crystallization and magma mingling.
Isotopic data reveal the Kosciusko tonalite formed from a single crustal source, whereas the Berridale adamellite originated from two distinct sources with a substantial I-type magma input.
The Dundee rhyodacite shows complex zircon morphology and Hf isotope fluctuations indicative of a moderate crustal contribution during its evolution.

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Implication

Geochemical analysis demonstrates correlation between zircon morphology and isotopic signatures in Eastern Australian granitoids, highlighting magma mixing and diverse crustal sources.

Cite This Study

Белоусова et al. (2005) studied this question.

synapsesocial.com/papers/69e488a58de97b87b7a46f65 https://doi.org/10.1093/petrology/egi077

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Implication

Geochemical analysis demonstrates correlation between zircon morphology and isotopic signatures in Eastern Australian granitoids, highlighting magma mixing and diverse crustal sources.

Zircon Crystal Morphology, Trace Element Signatures and Hf Isotope Composition as a Tool for Petrogenetic Modelling: Examples From Eastern Australian Granitoids

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Discussion

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Cite This Study

Zircon Crystal Morphology, Trace Element Signatures and Hf Isotope Composition as a Tool for Petrogenetic Modelling: Examples From Eastern Australian Granitoids

Key Points

Discussion

Implication

Cite This Study

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