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Further evidence for two metamorphic events in the Mawson Continent

Published online by Cambridge University Press:  04 December 2017

Megan A. Williams ,
David E. Kelsey ,
Martin Hand ,
Tom Raimondo ,
Laura J. Morrissey ,
Naomi M. Tucker  and
Rian A. Dutch
Megan A. Williams*
Affiliation:
Department of Earth Sciences, School of Physical Sciences, University of Adelaide, Adelaide, SA 5005, Australia
David E. Kelsey
Affiliation:
Department of Earth Sciences, School of Physical Sciences, University of Adelaide, Adelaide, SA 5005, Australia
Martin Hand
Affiliation:
Department of Earth Sciences, School of Physical Sciences, University of Adelaide, Adelaide, SA 5005, Australia
Tom Raimondo
Affiliation:
School of Natural and Built Environments, University of South Australia, Adelaide, SA 5001, Australia
Laura J. Morrissey
Affiliation:
Department of Earth Sciences, School of Physical Sciences, University of Adelaide, Adelaide, SA 5005, Australia School of Natural and Built Environments, University of South Australia, Adelaide, SA 5001, Australia
Naomi M. Tucker
Affiliation:
Department of Earth Sciences, School of Physical Sciences, University of Adelaide, Adelaide, SA 5005, Australia
Rian A. Dutch
Affiliation:
Department of Earth Sciences, School of Physical Sciences, University of Adelaide, Adelaide, SA 5005, Australia Geological Survey of South Australia, Department of State Development, Level 7, 101 Grenfell Street, Adelaide, SA 5000, Australia
*
[email protected]
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Abstract

In this study, in situ and erratic samples from George V Coast (East Antarctica) and southern Eyre Peninsula (Australia) have been used to characterize the microstructural, pressure–temperature and geochronological record of upper amphibolite and granulite facies polymetamorphism in the Mawson Continent to provide insight into the spatial distribution of reworking and the subice geology of the Mawson Continent. Monazite U-Pb data shows that in situ samples from the George V Coast record exclusively 2450–2400 Ma ages, whereas most erratic samples from glacial moraines at Cape Denison and the Red Banks Charnockite record only 1720–1690 Ma ages, consistent with known ages of the Sleaford and Kimban events, respectively. Phase equilibria forward modelling reveals considerable overlap of the thermal character of these two events. Samples with unimodal 1720–1690 Ma Kimban ages reflect either formation after the Sleaford event or complete metamorphic overprinting. Rocks recording only 2450–2400 Ma ages were unaffected by the younger Kimban event, perhaps as a result of unreactive rock compositions inherited from the Sleaford event. Our results suggest the subice geology of the Mawson Continent is a pre-Sleaford-aged terrane with a cover sequence reworked during the Kimban event.

Keywords

Cape DenisonKimbanP–T pseudosectionSleafordU-Pb monazite geochronology
Type
Earth Sciences
Information
Antarctic Science , Volume 30 , Issue 1 , February 2018 , pp. 44 - 65
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Copyright
© Antarctic Science Ltd 2017 

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Footnotes

*

The original version of this article was published with errors. A notice detailing this has been published and the error rectified in the online PDF and HTML copies.

References

Aitken, A.R.A., Young, D.A., Ferraccioli, F., Betts, P.G., Greenbaum, J.S., Richter, T.G., Roberts, J.L., Blankenship, D.D. & Siegert, M.J. 2014. The subglacial geology of Wilkes Land, East Antarctica. Geophysical Research Letters, 41, 2390–2400.Google Scholar
Belousova, E.A., Reid, A.J., Griffin, W.L. & O’Reilly, S.Y. 2009. Rejuvenation vs. recycling of Archean crust in the Gawler Craton, South Australia: evidence from U-Pb and Hf isotopes in detrital zircon. Lithos, 113, 570–582.Google Scholar
Brown, M. 2007. Crustal melting and melt extraction, ascent and emplacement in orogens: mechanisms and consequences. Journal of the Geological Society, 164, 709–730.CrossRefGoogle Scholar
Buick, I.S., Hermann, J., Williams, I.S., Gibson, R.L. & Rubatto, D. 2006. A SHRIMP U-Pb and LA-ICP-MS trace element study of the petrogenesis of garnet–cordierite–orthoamphibole gneisses from the Central Zone of the Limpopo Belt, South Africa. Lithos, 88, 150–172.Google Scholar
Di Vincenzo, G., Talarico, F. & Kleinschmidt, G. 2007. An 40Ar/39Ar investigation of the Mertz Glacier area (George V Land, Antarctica): implications for the Ross Orogen–East Antarctic Craton relationship and Gondwana reconstructions. Precambrian Research, 152, 93–118.Google Scholar
Diener, J.F.A., White, R.W. & Powell, R. 2008. Granulite facies metamorphism and subsolidus fluid‐absent reworking, Strangways Range, Arunta Block, central Australia. Journal of Metamorphic Geology, 26, 603–622.Google Scholar
Duclaux, G., Rolland, Y., Ruffet, G., Ménot, R.-P., Guillot, S., Peucat, J.-J., Fanning, M., Rey, P. & Pêcher, A. 2008. Superimposed Neoarchaean and Paleoproterozoic tectonics in the Terre Adélie Craton (East Antarctica): evidence from Th-U-Pb ages on monazite and 40Ar/39Ar ages. Precambrian Research, 167, 316–338.Google Scholar
Dutch, R.A., Hand, M. & Kelsey, D.E. 2010. Unravelling the tectonothermal evolution of reworked Archean granulite facies metapelites using in situ geochronology: an example from the Gawler Craton, Australia. Journal of Metamorphic Geology, 28, 293–316.Google Scholar
Dutch, R.A., Hand, M. & Kinny, P.D. 2008. High-grade Paleoproterozoic reworking in the southeastern Gawler Craton, South Australia. Australian Journal of Earth Sciences, 55, 1063–1081.CrossRefGoogle Scholar
Fitzsimons, I.C.W. 2003. Proterozoic basement provinces of southern and southwestern Australia, and their correlation with Antarctica. Special Publication of the Geological Society of London, No. 206, 93–130.CrossRefGoogle Scholar
Gapais, D., Pelletier, A., Ménot, R.-P. & Peucat, J.-J. 2008. Paleoproterozoic tectonics in the Terre Adélie Craton (East Antarctica). Precambrian Research, 162, 531–539.Google Scholar
Hand, M., Reid, A. & Jagodzinski, L. 2007. Tectonic framework and evolution of the Gawler Craton, Southern Australia. Economic Geology, 102, 1377–1395.Google Scholar
Holland, T.J.B. & Powell, R. 1998. An internally consistent thermodynamic data set for phases of petrological interest. Journal of Metamorphic Geology, 16, 309–343.Google Scholar
Holland, T.J.B. & Powell, R. 2011. An improved and extended internally consistent thermodynamic dataset for phases of petrological interest, involving a new equation of state for solids. Journal of Metamorphic Geology, 29, 333–383.Google Scholar
Jackson, S.E., Pearson, N.J., Griffin, W.L. & Belousova, E.A. 2004. The application of laser ablation-inductively coupled plasma-mass spectrometry to in situ U-Pb zircon geochronology. Chemical Geology, 211, 47–69.Google Scholar
Jagodzinski, E.A., Reid, A.J. & Hand, M. 2012. SHRIMP U-Pb geochronology of Archaean to Palaeoproterozoic rocks from the southern Eyre Peninsula. Adelaide, SA: DMITRE Resources and Energy Group, Geological Survey of South Australia.Google Scholar
Kelly, N.M., Harley, S.L. & Möller, A. 2012. Complexity in the behavior and recrystallization of monazite during high-T metamorphism and fluid infiltration. Chemical Geology, 322, 192–208.Google Scholar
Kelsey, D.E., Hand, M., Clark, C. & Wilson, C.J.L. 2007. On the application of in situ monazite chemical geochronology to constraining P–T–t histories in high-temperature (>850°C) polymetamorphic granulites from Prydz Bay, East Antarctica. Journal of the Geological Society, 164, 667–683.Google Scholar
Korhonen, F.J., Clark, C., Brown, M., Bhattacharya, S. & Taylor, R. 2013. How long-lived is ultrahigh temperature (UHT) metamorphism? Constraints from zircon and monazite geochronology in the Eastern Ghats orogenic belt, India. Precambrian Research, 234, 322–350.CrossRefGoogle Scholar
Lane, K., Jagodzinski, E.A., Dutch, R., Reid, A.J. & Hand, M. 2015. Age constraints on the timing of iron ore mineralisation in the southeastern Gawler Craton. Australian Journal of Earth Sciences, 62, 55–75.Google Scholar
Ludwig, K. 2008. User’s manual for Isoplot 3.6: a geochronological toolkit for Microsoft Excel. Special Publication 4. Berkeley, CA: Berkeley Geochronological Center.Google Scholar
Mahan, K.H., Smit, C.A., Williams, M.L., Dumond, G. & van Reenen, D.D. 2011. Heterogeneous strain and polymetamorphism in high-grade terranes: insight into crustal processes from the Athabasca Granulite Terrane, western Canada, and the Limpopo Complex, southern Africa. In van Reenen, D.D, Kramers, J.D., McCourt, S. & Perchuk, L.L., eds. Origin and evolution of Precambrian high-grade gneiss terranes, with special emphasis on the Limpopo Complex of southern Africa. Boulder, CO: Geological Society of America, 269–287.Google Scholar
Ménot, R.P., Pecher, A., Rolland, Y., Peucat, J.J., Pelletier, A., Duclaux, G. & Guillot, S. 2005. Structural setting of the Neoarchean terranes in the Commonwealth Bay area (143–145°E), Terre Adélie Craton, East Antarctica. Gondwana Research, 8, 1–9.Google Scholar
Morrissey, L.J., Hand, M., Kelsey, D.E. & Wade, B.P. 2016. Cambrian high-temperature reworking of the Rayner–Eastern Ghats terrane: constraints from the northern Prince Charles Mountains region, East Antarctica. Journal of Petrology, 57, 53–91.Google Scholar
Oliver, R.L. & Fanning, C.M. 1997. Australia and Antarctica: precise correlation of Palaeoproterozoic terranes. In Ricci, C.A., ed. The Antarctic region: geological evolution and processes. Sienna: Terra Antartica Publication, 163–172.Google Scholar
Oliver, R.L. & Fanning, C.M. 2002. Proterozoic geology east and southeast of Commonwealth Bay, George V Land, Antarctica, and its relationship to that of adjacent Gondwana terranes. Royal Society of New Zealand Bulletin, No. 35, 51–58.Google Scholar
Payne, J.L., Hand, M., Barovich, K.M. & Wade, B.P. 2008. Temporal constraints on the timing of high-grade metamorphism in the northern Gawler Craton: implications for assembly of the Australian Proterozoic. Australian Journal of Earth Sciences, 55, 623–640.Google Scholar
Payne, J.L., Hand, M., Barovich, K.M., Reid, A. & Evans, D.A. 2009. Correlations and reconstruction models for the 2500–1500 Ma evolution of the Mawson Continent. Special Publication of the Geological Society of London, No. 323, 319–355.Google Scholar
Pearce, M.A., White, A.J.R. & Gazley, M.F. 2015. TCInvestigator: automated calculation of mineral mode and composition contours for THERMOCALC pseudosections. Journal of Metamorphic Geology, 33, 413–425.Google Scholar
Powell, R., White, R., Green, E.C.R., Holland, T.J.B. & Diener, J.F.A. 2014. On parameterizing thermodynamic descriptions of minerals for petrological calculations. Journal of Metamorphic Geology, 32, 245–260.CrossRefGoogle Scholar
Raimondo, T., Clark, C., Hand, M., Cliff, J. & Anczkiewicz, R. 2013. A simple mechanism for mid-crustal shear zones to record surface-derived fluid signatures. Geology, 41, 711–714.CrossRefGoogle Scholar
Reid, A.J. & Hand, M. 2012. Mesoarchean to Mesoproterozoic evolution of the southern Gawler Craton, South Australia. Episodes, 35, 216–225.Google Scholar
Rignot, E., Mouginot, J. & Scheuchl, B. 2011. Ice flow of the Antarctic ice sheet. Science, 333, 1427–1430.Google Scholar
Szpunar, M., Hand, M., Barovich, K., Jagodzinski, E. & Belousova, E. 2011. Isotopic and geochemical constraints on the Paleoproterozoic Hutchison Group, southern Australia: implications for Paleoproterozoic continental reconstructions. Precambrian Research, 187, 99–126.CrossRefGoogle Scholar
Tikku, A.A. & Cande, S.C. 1999. The oldest magnetic anomalies in the Australian–Antarctic Basin: are they isochrons? Journal of Geophysical Research - Solid Earth, 104, 661–677.CrossRefGoogle Scholar
Waters, D.J. 2001. The significance of prograde and retrograde quartz-bearing intergrowth microstructures in partially melted granulite-facies rocks. Lithos, 56, 97–110.Google Scholar
White, R.W., Powell, R. & Johnson, T.E. 2014a. The effect of Mn on mineral stability in metapelites revisited: new a–x relations for manganese‐bearing minerals. Journal of Metamorphic Geology, 32, 809–828.CrossRefGoogle Scholar
White, R.W., Powell, R., Holland, T.J.B., Johnson, T.E. & Green, E.C.R. 2014b. New mineral activity–composition relations for thermodynamic calculations in metapelitic systems. Journal of Metamorphic Geology, 32, 261–286.Google Scholar
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