Uncoupled O and Hf isotopic systems in zircon from the contrasting granite suites of the New England Orogen, eastern Australia: Implications for studies of Phanerozoic magma genesis
The Permo-Triassic granites of the New England Orogen, eastern Australia, were emplaced into a volcanic arc complex accreted to the eastern Gondwana margin in the Late Devonian or Early Carboniferous. Zircon U-Pb dating shows that the S-type Hillgrove (~297Ma) and Bundarra (~287Ma) Supersuites predated intrusion of the I-type Moonbi Supersuite (~250Ma) by up to 50Ma. The high δ18Ozrn of the S-type granites (10.0-11.5‰), and range of U-Pb ages (~370-300Ma) and δ18Ozrn (~5-10‰) of their inherited...[Show more]
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|Source:||Geochimica et Cosmochimica Acta|
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