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Bisnath, Avinash; Frimmel, Hartwig E; Armstrong, Robert A; Board, W S (2006): SHRIMP U-Pb zircon data from Gjelsvikfjella, Dronning Maud Land, East Antarctica [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.847015, Supplement to: Bisnath, A et al. (2006): Tectono-thermal evolution of the Maud Belt: New SHRIMP U–Pb zircon data from Gjelsvikfjella, Dronning Maud Land, East Antarctica. Precambrian Research, 150(1-2), 95-121, https://doi.org/10.1016/j.precamres.2006.06.009

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Abstract:
The Maud Belt in Dronning Maud Land (western East Antarctic Craton) preserves a high-grade polyphase tectono-thermal history with two orogenic episodes of Mesoproterozoic (1.2-1.0 Ga) and Neoproterozoic (0.6-0.5 Ga) age. New SHRIMP U-Pb zircon data from southern Gjelsvikfjella in the northeastern part of the belt make it possible to differentiate between a series of magmatic and metamorphic events. The oldest event recorded is the formation of an extensive 1140-1130 Ma volcanic arc. This was followed by 1104 ± 8 Ma granitoids that might represent, together with so far undated mafic dykes, part of a decompression melting-related bimodal suite that reflects the sub-continental Umkondo igneous event. The first high-grade metamorphism is constrained at 1070 Ma. The metamorphic age data are similar to those obtained from other parts of the Maud Belt, but also from the Namaqua-Natal Belt in South Africa, but the preceding arc formation was diachronous in the two belts. This indicates that the two belts did not form a continuous volcanic arc unit as suggested in previous models, but became connected only at the end of the Mesoproterozoic.
Intense reworking during the Neoproterozoic, probably as a result of continent-continent collision between components of Gondwana, is indicated by ductile refliation, further high-grade metamorphic recrystallisation and metamorphic zircon overgrowths at approximately 530 Ma. This was followed by late- to post-tectonic magmatism, reflected by 500 Ma granite bodies and 490 Ma aplite dykes as well as a 480 Ma gabbro body.
Project(s):
Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas (SPP1158)
Funding:
German Research Foundation (DFG), grant/award no. 5472008: Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas
Coverage:
Latitude: -71.965000 * Longitude: 3.240000
Event(s):
Gjelsvikfjella * Latitude: -71.965000 * Longitude: 3.240000 * Location: Dronning Maud Land, Antarctica * Method/Device: Rock sample (ROCK)
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
8 datasets

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Datasets listed in this publication series

  1. Bisnath, A; Frimmel, HE; Armstrong, RA et al. (2006): (Appendix) Rare earth element concentrations of individual zircon domains from Gjelsvikfjella, Dronning Maud Land. https://doi.org/10.1594/PANGAEA.847014
  2. Bisnath, A; Frimmel, HE; Armstrong, RA et al. (2006): (Table 2) SHRIMP U-Pb zircon data for samples ABA/81 and WBJS3 from Gjelsvikfjella, Dronning Maud Land. https://doi.org/10.1594/PANGAEA.847005
  3. Bisnath, A; Frimmel, HE; Armstrong, RA et al. (2006): (Table 3) SHRIMP U-Pb zircon data for sample ABA/10A from Gjelsvikfjella, Dronning Maud Land. https://doi.org/10.1594/PANGAEA.847006
  4. Bisnath, A; Frimmel, HE; Armstrong, RA et al. (2006): (Table 4) SHRIMP U-Pb zircon data for sample ABA/10B from Gjelsvikfjella, Dronning Maud Land. https://doi.org/10.1594/PANGAEA.847007
  5. Bisnath, A; Frimmel, HE; Armstrong, RA et al. (2006): (Table 5) SHRIMP U-Pb zircon data for sample ABA/21 from Gjelsvikfjella, Dronning Maud Land. https://doi.org/10.1594/PANGAEA.847009
  6. Bisnath, A; Frimmel, HE; Armstrong, RA et al. (2006): (Table 6) SHRIMP U-Pb zircon data for sample ABA/32 from Gjelsvikfjella, Dronning Maud Land. https://doi.org/10.1594/PANGAEA.847010
  7. Bisnath, A; Frimmel, HE; Armstrong, RA et al. (2006): (Table 7) SHRIMP U-Pb zircon data for sample ABA/64 from Gjelsvikfjella, Dronning Maud Land. https://doi.org/10.1594/PANGAEA.847011
  8. Bisnath, A; Frimmel, HE; Armstrong, RA et al. (2006): (Table 8) SHRIMP U-Pb zircon data for sample ABA/69 from Gjelsvikfjella, Dronning Maud Land. https://doi.org/10.1594/PANGAEA.847013