1887
25th International Conference and Exhibition – Interpreting the Past, Discovering the Future
  • ISSN: 2202-0586
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Abstract

The Coompana airborne survey is a large-scale pre-competitive aeromagnetic and radiometric survey in western South Australia flown in 2015. The survey was undertaken in order to provide greater geological controls on the basement geology in this area, which lies beneath the cover sequences of the Eucla, Bight, Denman and Officer Basins. This survey covers much of the South Australian part of the Coompana Province, which includes the Coompana Magnetic Anomaly. In this preliminary interpretation of the aeromagnetic survey, we have distinguished five basement domains based on the magnetic data and attempted to differentiate where domain boundaries are structural or intrusive. Integrating the aeromagnetic interpretation with existing drillhole and outcrop constraints suggests that the western part of South Australia had a long-lived, dynamic geological history with at least four major rock-forming events identified in the Coompana Province: c. 1610 Ma, c. 1500 Ma, c. 1180 Ma and c. 860 Ma. Detailed interpretation of the 200 m line-spaced infill region has enabled contact and relative age relationships of the intrusive bodies causing the Coompana Magnetic Anomaly. We suggest a multi-phase intrusive complex, with an early deep disc-like intrusion, followed by pipe-like satellite bodies intruding higher into the crust. The relative age of this intrusive complex is interpreted to be between c. 1120 Ma and c. 860 Ma.

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2016-12-01
2026-01-16

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References

  1. Cowley WM 2009. Kulyong Formation renamed Table Hill Volcanics in South Australia. MESA Journal 54:20. Department of Primary Industries and Resources South Australia, Adelaide.
  2. Crawford AJ and Hilyard D 1990. Geochemistry of late Proterozoic tholeiitic flood basalts, Adelaide Geosyncline, South Australia. In JB Jago and PS Moore eds, The evolution of a late Precambrian-early Palaeozoic rift complex: the Adelaide Geosyncline, Special Publication 16. Geological Society of Australia, Sydney, pp. 49-67.
  3. Dutch RA, Doublier MP, Pawley MJ, Wise TW, Reid AJ, Clark D, Kennett BLN, Fraser G, Thiel S and van der Wielen S 2015. Geological and geodynamic implications of the western Gawler Craton section of seismic line 13GA-EG1. In RA Dutch, MJ Pawley and TW Wise eds, What lies beneath the western Gawler Craton? 13GA-EG1E Seismic and Magnetotelluric Workshop 2015, Report Book 2015/00029. Department of State Development, South Australia, Adelaide.
  4. Dutch RA, Pawley MJ and Wise TW 2015. What lies beneath the western Gawler Craton? 13GA-EG1E Seismic and Magnetotelluric Workshop 2015, Report Book 2015/00029. Department of State Development, South Australia, Adelaide.
  5. Dunn CE and Waldron H 2014. Regional biogeochemical survey of the Eucla Basin, South Australia, Report Book 2014/00025. Department of State Development, South Australia, Adelaide.
  6. Edgoose CJ, Scrimgeour IR and Close DF 2004. Geology of the Musgrave Block, Northern Territory, Report 15. Northern Territory Geological Survey, Darwin.
  7. Jagodzinski EA and Dutch RA 2013. SHRIMP U-Pb geochronology of the Tieyon (5645) 1:100 000 mapsheet, Report Book 2013/00006. Department for Manufacturing, Innovation, Trade, Resources and Energy, South Australia, Adelaide.
  8. Howard HM, Smithies RH, Kirkland CL, Kelsey DE, Aitken A, Wingate MTD, Quentin de Gromard R, Spaggiari CV and Maier WD 2015. The burning heart - the Proterozoic geology and geological evolution of the west Musgrave Region, central Australia. Gondwana Research 27(1):64-94.
  9. Neumann NL and Korsch RJ 2014. SHRIMP U-Pb zircon ages from Kutjara 1 and Mulyawara 1, northwestern South Australia, Record 2014/05. Geoscience Australia, Canberra.
  10. Payne JL, Barovich KM and Hand M 2006. Provenance of metasedimentary rocks in the northern Gawler Craton, Australia: implications for Palaeoproterozoic reconstructions. Precambrian Research 148(3-1):275-291.
  11. Smithies RH, Howard HM, Evins PM, Kirkland CL, Kelsey DE, Hand M, Wingate MTD, Collins AS and Belousova E 2011. High-temperature granite magmatism, crust-mantle interaction and the Mesoproterozoic intracontinental evolution of the Musgrave Province, central Australia. Journal of Petrology 52(5):931-958.
  12. Travers DC 2015. Geochronology and petrogenesis of mafic magmatism in the Coompana Province. BSc Hons thesis, University of Adelaide.
  13. Tucker NM, Hand M, Kelsey DE and Dutch RA 2015. A duality of timescales: short-lived ultrahigh temperature metamorphism preserving a long-lived monazite growth history in the Grenvillian Musgrave-Albany-Fraser Orogen. Precambrian Research 264:204-234.
  14. Wade BP, Payne JL, Hand M and Barovich KM 2007. Petrogenesis of ca 1.50 Ga granitic gneiss of the Coompana Block: filling the 'magmatic gap' of Mesoproterozoic Australia. Australian Journal of Earth Sciences 54:1089-1102.
  15. Walsh AK, Kelsey DE, Kirkland CL, Hand M, Smithies RH, Clark C and Howard HM 2015. P-T-t evolution of a large, long-lived, ultrahigh-temperature Grenvillian belt in central Australia. Gondwana Research 28(2):531-564.
  16. Werner MX, Dutch RA, Pawley MJ, Krapf CBE 2014. Mafic intrusions in the east Musgraves: new geochemical data set available now! In Unlocking SA's Mineral Wealth Technical Forum, Presentation abstracts and posters, Report Book 2014/00004. Department of State Development, South Australia, Adelaide, pp. 37-40.
  17. Wingate MT, Campbell IH, Compston W and Gibson GM 1998. Ion microprobe U-Pb ages for Neoproterozoic basaltic magmatism in south-central Australia and implications for the breakup of Rodinia. Precambrian Research 87:135-159.
  18. Wingate MT, Kirkland CL, Spaggiari CV and Smithies RH 2015. U-Pb geochronology of the Forrest Zone of the Coompana Province. In CV Spaggiari and RH Smithies eds, Eucla Basement Stratigraphic Drilling Results Release Workshop: Extended Abstracts, Record 2015/10. Geological Survey of Western Australia, Perth, pp. 37-40.
  19. Zhao J and McCulloch MT 1993. Sm-Nd mineral isochron ages of late Proterozoic dyke swarms in Australia: evidence for two distinctive events of mafic magmatism and crustal extension. Chemical Geology 109:341-354.
  20. Zhao J, McCulloch MT and Korsch RJ 1994. Characterisation of a plume-related ~800 Ma magmatic event and its implications for basin formation in central-southern Australia. Earth and Planetary Science Letters 121:349-367.
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  • Article Type: Research Article
Keyword(s): Aeromagnetics; Basement; Coompana; Domains; Intrusions

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