Skip to main content Accessibility help
×
Home

The impact of the Pan-African-aged tectonothermal event on high-grade rocks at Mount Brown, East Antarctica

  • Xiaochun Liu (a1), Bin Fu (a2), Qiuli Li (a3), Yue Zhao (a1), Jian Liu (a1) and Hong Chen (a1)...

Abstract

This study presents monazite and rutile U–Pb and hornblende and biotite 40Ar/39Ar geochronological data for high-grade rocks of the eastern Grenville-aged Rayner orogen at Mount Brown in order to analyse the extent and degree of Pan-African-aged reworking. Monazite from paragneiss yields U–Pb ages of 910 Ma for larger granular grains and 670–630 Ma for smaller globular beads around garnet porphyroblasts or hosted by symplectites. Rutile from leucogneiss yields U–Pb ages of 520–515 Ma. Hornblende and biotite from different rock types yield 40Ar/39Ar plateau ages of 744 and 520–505 Ma, respectively. Combining these results with published zircon U–Pb age data suggests that granulite facies metamorphism occurred at 910 Ma, with a local low-temperature fluid flow event at 670–630 Ma and thermal reworking at 520–505 Ma. The older age of 744 Ma may reflect cooling or partial resetting of the hornblende 40Ar/39Ar system, indicating that Pan-African-aged reworking did not exceed temperatures much higher than the hornblende Ar closure temperature. These data also suggest that the complete isotopic resetting of some minerals may occur without the growth of new mineral phases, providing an example of the style of reworking that is likely to occur in polymetamorphic terranes.

  • View HTML
    • Send article to Kindle

      To send this article to your Kindle, first ensure no-reply@cambridge.org is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about sending to your Kindle. Find out more about sending to your Kindle.

      Note you can select to send to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be sent to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.

      Find out more about the Kindle Personal Document Service.

      The impact of the Pan-African-aged tectonothermal event on high-grade rocks at Mount Brown, East Antarctica
      Available formats
      ×

      Send article to Dropbox

      To send this article to your Dropbox account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Dropbox.

      The impact of the Pan-African-aged tectonothermal event on high-grade rocks at Mount Brown, East Antarctica
      Available formats
      ×

      Send article to Google Drive

      To send this article to your Google Drive account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Google Drive.

      The impact of the Pan-African-aged tectonothermal event on high-grade rocks at Mount Brown, East Antarctica
      Available formats
      ×

Copyright

This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original work is properly cited.

Corresponding author

References

Hide All
Aleinikoff, J.N., Schenck, W.S., Plank, M.O., Srogi, L.-A., Fanning, C.M., Kamo, S.L. & Bosbyshell, H. 2006. Deciphering igneous and metamorphic events in high-grade rocks of the Wilmington Complex, Delaware: morphology, cathodoluminescence and backscattered electron zoning, and SHRIMP U–Pb geochronology of zircon and monazite. Geological Society of American Bulletin, 118, 3964.
Boger, S.D. & Wilson, C.J.L. 2005. Early Cambrian crustal shortening and a clockwise PT –t path from the southern Prince Charles Mountains, East Antarctica: implications for the formation of Gondwana. Journal of Metamorphic Geology, 23, 603623.
Boger, S.D., Carson, C.J., Fanning, C.M., Hergt, J.M., Wilson, C.J.L. & Woodhead, J.D. 2002. Pan-African intraplate deformation in the northern Prince Charles Mountains, East Antarctica. Earth and Planetary Science Letters, 195, 195210.
Carson, C.J., Powell, P., Wilson, C.J.L. & Dirks, P.H.G.M. 1997. Partial melting during tectonic exhumation of a granulite terrane: an example from the Larsemann Hills, East Antarctica. Journal of Metamorphic Geology, 15, 105126.
Chen, C.-H., Liu, Y.-H., Lee, C.-Y., Xiang, H. & Zhou, H.-W. 2012. Geochronology of granulite, charnockite and gneiss in the poly-metamorphosed Gaozhou Complex (Yunkai massif), South China: emphasis on the in-situ EMP monazite dating. Lithos, 144–145, 109129.
Chen, L.Y., Wang, W., Liu, X.C. & Zhao, Y. 2018. Metamorphism and zircon U–Pb dating of high-pressure pelitic granulites from glacial moraines in the Grove Mountains, East Antarctica. Advances in Polar Science, 29, 118134.
Cherniak, D.J. 2000. Pb diffusion in rutile. Contribution to Mineralogy and Petrology, 139, 198207.
Cherniak, D.J., Watson, E.B., Grove, M. & Harrison, T.M. 2004. Pb diffusion in monazite: a combined RBS/SIMS study. Geochimica et Cosmochimica Acta, 68, 829840.
Daczko, N., Halpin, J.A., Fitzsimong, I.C.W. & Whittaker, J.M. 2018. A cryptic Gondwana-forming orogen located in Antarctica. Scientific Reports, 8, 8371.
Duncan, R.A. & Keller, R.A. 2004. Radiometric ages for basement rocks from the Emperor Seamounts, ODP Leg 197. Geochemistry, Geophysics, Geosystems, 5, 10.1029/2004GC000704.
Fitzsimons, I.C.W. 1996. Metapelitic migmatites from Brattstrand Bluffs, East Antarctica-metamorphism, melting and exhumation of the mid crust. Journal of Petrology, 37, 395414.
Fitzsimons, I.C.W., Kinny, P.D. & Harley, S.L. 1997. Two stages of zircon and monazite growth in anatectic leucogneiss: SHRIMP constraints on the duration and intensity of Pan-African metamorphism in Prydz Bay, East Antarctica. Terra Nova, 9, 4751.
Franz, G., Andrehs, G. & Rhede, D. 1996. Crystal chemistry of monazite and xenotime from Saxothuringian–Moldanubian metapelites, NE Bavaria, Germany. European Journal of Mineralogy, 8, 10971118.
Harley, S.L. 1998. Ultrahigh temperature granulite metamorphism (1,050°C, 12kbar) and decompression in garnet (Mg70)–orthopyroxene–sillimanite gneisses from the Rauer Group, East Antarctica. Journal of Metamorphic Geology, 16, 541562.
Harlov, D.E., Wirth, R. & Hetherington, C.J. 2011. Fluid-mediated partial alteration in monazite: the role of coupled dissolution–reprecipitation in element redistribution and mass transfer. Contributions to Mineralogy and Petrology, 162, 329348.
Hensen, B.J. & Zhou, B. 1995. A Pan-African granulite facies metamorphic episode in Prydz Bay, Antarctica: evidence from Sm–Nd garnet dating. Australian Journal of Earth Sciences, 42, 249258.
Horie, K., Hokada, T., Motoyoshi, Y., Shiraishi, K., Hiroi, Y. & Takehara, M. 2016. U–Pb zircon geochronology in the western part of the Rayner Complex, East Antarctica. Journal of Mineralogical and Petrological Sciences, 111, 104117.
Kelly, N.M., Harley, S.M. & Möller, A. 2012. Complexity in the behavior and recrystallization of monazite during high-T metamorphism and fluid infiltration. Chemical Geology, 322–323, 192208.
Kelsey, D.E., White, R.W., Powell, R., Wilson, C.J.L. & Quinn, C.D. 2003. New constraints on metamorphism in the Rauer Group, Prydz Bay, East Antarctica. Journal of Metamorphic Geology, 21, 739759.
Kelsey, D.E., Hand, M., Clark, C. & Wilson, C.J.L. 2007. On the application of in situ monazite chemical geochronology to constraining PT –t histories in high-temperature (>850°C) polymetamorphic granulites from Prydz Bay, East Antarctica. Journal of Geological Society London, 164, 667683.
Koppers, A.A.P. 2002. ArArCALC – software for 40Ar/39Ar age calculations. Computers & Geosciences, 28, 605619.
Koppers, A.A.P., Staudigel, H. & Wijbrans, J.R. 2000. Dating crystalline groundmass separates of altered Cretaceous seamount basalts by the 40Ar/39Ar incremental heating technique. Chemical Geology, 166, 139158.
Kuiper, K.F., Deino, A., Hilgen, F.J., Krijgsman, W., Renne, P.R. & Wijbranset, J.R. 2008. Synchronizing rock clocks of Earth history. Science, 320, 500504.
Li, Q.L., Li, S.G., Zheng, Y.-F., Li, H.M., Massonne, H.J. & Wang, Q.C. 2003. A high precision U–Pb age of metamorphic rutile in coesite-bearing eclogite from the Dabie Mountains in central China: a new constraint on the cooling history. Chemical Geology, 200, 255265.
Li, Q.L., Lin, W., Su, W., Li, X.H., Shi, Y.H., Liu, Y. & Tang, G.Q. 2011. SIMS U–Pb rutile age of low-temperature eclogites from south-western Chinese Tianshan, NW China. Lithos, 122, 7686.
Liu, X.C., Hu, J., Zhao, Y., Lou, Y., Wei, C. & Liu, X.H. 2009. Late Neoproterozoic/Cambrian high-pressure mafic granulites from the Grove Mountains, East Antarctica: PTt path, collisional orogeny and implications for assembly of East Gondwana. Precambrian Research, 174, 181199.
Liu, X.C., Zhao, Y. & Hu, J.M. 2013. The c. 1000–900 Ma and c. 550–500 Ma tectonothermal events in the Prince Charles Mountains-Prydz Bay region, East Antarctica, and their relations to supercontinent evolution. In Harley, S.L., Fitzsimons, I.C.W. & Zhao, Y., eds. Antarctica and supercontinent evolution. Special Publication of the Geological Society of London, No. 283, 95112.
Liu, X.C., Wang, W.R.Z., Zhao, Y., Liu, J., Chen, H., Cui, Y.C. & Song, B. 2016. Early Mesoproterozoic arc magmatism followed by early Neoproterozoic granulite facies metamorphism with a near-isobaric cooling path at Mount Brown, Princess Elizabeth Land, East Antarctica. Precambrian Research, 284, 3048.
Luvizotto, G.L., Zack, T., Meyer, M.P., Ludwig, T., Triebold, S., Kronz, A., et al. 2009. Rutile crystals as potential trace element and isotope mineral standards for microanalysis. Chemical Geology, 261, 346369.
McDougall, I. & Harrison, T.M. 1999. Geochronology and thermochronology by the 40Ar/39Ar method, 2nd ed.Oxford: Oxford University Press, 269 pp.
Mezger, K., Hanson, G.N. & Bohlen, S.R. 1989. High-precision U–Pb ages of metamorphic rutile: application to the cooling history of high-grade terranes. Earth and Planetary Science Letters, 96, 106118.
Mikhalsky, E.V., Belyatsky, B.V., Presnyakov, S.L., Skublov, S.G., Kovach, V.P., Rodionov, N.V., et al. 2015. The geological composition of the hidden Wilhelm II Land in East Antarctica: SHRIMP zircon, Nd isotopic and geochemical studies with implications for Proterozoic supercontinent reconstructions. Precambrian Research, 258, 171185.
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, 5392.
Phillips, G., White, R.W. & Wilson, C.J.L. 2007. On the role of deformation and fluid during rejuvenation of a polymetamorphic terrane: inferences on the geodynamic evolution of the Ruker Province, East Antarctica. Journal of Metamorphic Geology, 25, 855871.
Tong, L. & Wilson, C.J.L. 2006. Tectonothermal evolution of the ultrahigh temperature metapelites in the Rauer Group, East Antarctica. Precambrian Research, 149, 120.
Townsend, K.J., Miller, C.F., D'Andrea, J.L., Ayers, J.C., Harrison, T.M. & Coath, C.D. 2000. Low temperature replacement of monazite in the Ireteba Granite, southern Nevada; geochronological implications. Chemical Geology, 172, 95112.
Van Leeuwen, A.T.D.V., Morrissey, L.J., Kelsey, D.E. & Raimondo, T. 2019. Recognition of Pan-African-aged metamorphism in the Fisher Terrane, central Prince Charles Mountains, East Antarctica. Journal of the Geological Society, 28, 10.1144/jgs2018-146.
Williams, I.S. 1998. U–Th–Pb geochronology by ion microprobe. Reviews in Economic Geology, 7, 135.
Williams, M.L., Jercinovic, M.J., Harlov, D.E., Budzyn, B. & Hetherington, C.J. 2011. Resetting monazite ages during fluid-related alteration. Chemical Geology, 283, 218225.
Willigers, B.J.A., Van Gool, J.A.M., Wijbrans, J.R., Krogstad, E.J. & Mezger, K. 2002. Posttectonic cooling of the Nagssugtoqidian orogen and a comparison of contrasting cooling histories in Precambrian and Phanerozoic orogens. Journal of Geology, 110, 503517.
Zack, T., Stockli, D.F., Luvizotto, G.L., Barth, M.G., Belousova, E., Wolfe, M. & Hinton, R.W. 2011. In situ U–Pb rutile dating by LA-ICP-MS: 208Pb correction and prospects for geological applications. Contributions to Mineralogy and Petrology, 162, 515530.

Keywords

Type Description Title
PDF
Supplementary materials

Liu et al. supplementary material
Liu et al. supplementary material

 PDF (742 KB)
742 KB

The impact of the Pan-African-aged tectonothermal event on high-grade rocks at Mount Brown, East Antarctica

  • Xiaochun Liu (a1), Bin Fu (a2), Qiuli Li (a3), Yue Zhao (a1), Jian Liu (a1) and Hong Chen (a1)...

Metrics

Altmetric attention score

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed