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| Titel: |
Timing of Proterozoic metamorphism in the southern Curnamona Province: implications for tectonic models and continental reconstructions |
| Auteur: |
Rutherford, L. Hand, M. Barovich, K. |
| Verschenen in: |
Australian journal of earth sciences |
| Paginering: | Jaargang 54 (2007) nr. 1 pagina's 65-81 |
| Jaar: |
2007-02 |
| Inhoud: |
Chemical U - Th - Pb monazite ages from metasedimentary and meta-igneous units of the Willyama Supergroup have confirmed initial SHRIMP U - Pb metamorphic zircon ages constraining the onset of the earliest tectonometamorphic event (the Olarian Orogeny) at ca 1610 Ma in the southern Curnamona Province. An additional episode of high-grade metamorphism and heterogeneously distributed retrograde metamorphism and monazite recrystallisation occurred between ca 1570 and 1550 Ma. On the basis of monazite chemical U - Th - Pb ages from across the southern Curnamona Province, tectonometamorphic models based on ca 1690 Ma low-P, high-T metamorphism in the southern Curnamona Province are not supported. Furthermore, tectonic reconstructions that rely on the correlation of ca 1690 Ma deformation and metamorphism in the Broken Hill region with a similar aged event in the Mojave tarrane of southwestern Laurentia (AUSWUS) are not supported. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 9 van 9 gevonden artikelen
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