Tookoonooka crater

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The Tookoonooka is a large impact crater in southwest Queensland in Australia that was caused by a meteorite millions of years ago. The crater is buried about 900 meters deep under the sediments of the Eromanga Basin from the Mesozoic Era. He cannot be seen on the surface of the earth.

The Tookoonooka was discovered through seismological investigations during a mineral oil deposit exploration and was first published in 1989. According to the impact theory, the impact changed quartz minerals in the crater rim that were discovered during drilling. The diameter of the crater is estimated to be 55 to 65 kilometers. The crater was formed in the Kraton Cadna-owie Formation 123–133 million or 115–112 million years ago. Tookoonooka is associated with numerous small oil fields.

Seismic data point to a nearby comparable structure from the same period called Talundilly. Although it seems that Tookoonooka and Talundilly were formed by a meteorite at the same time, this cannot be proven without drilling investigations.

Individual evidence

  1. ↑ Passc.net : Tookoonooka on Earth Impact Database , accessed 23 May 2012
  2. ^ A b Gorter JD, Gostin VA & Plummer P. (1989): The Tookoonooka Structure: an enigmatic sub-surface feature in the Eromanga Basin, its impact origin and implications for petroleum exploration . In: O'Neil BJ (Eds.): The Cooper and Eromanga Basins, Australia: Proceedings of the Cooper and Eromanga Basins Conference , Adelaide, 1989, pp. 441-456. Petroleum Exploration Society of Australia, Society of Petroleum Engineers, Australian Society of Exploration Geophysicists (SA Branches).
  3. ^ A b c Gostin VA & Therriault AM (1997): Tookoonooka, a large buried Early Cretaceous impact structure in the Eromanga Basin of southwestern Queensland, Australia . In: Meteoritics and Planetary Science 32, pp. 593-599. bibcode : 1997M & PS ... 32..593G
  4. ↑ a b c Gorter JD (1998) :. The petroleum potential of Australian Phanerozoic impact structures . In: APPEA Journal 38, pp. 159-187.
  5. ↑ Longley IM (1989): The Talundilly anomaly and its implications for hydrocarbon exploration of Eromanga astroblemes . In: O'Neil BJ: (Eds.): The Cooper and Eromanga Basins, Australia: Proceedings of the Cooper and Eromanga Basins Conference , Adelaide, 1989, pp. 473-490. Petroleum Exploration Society of Australia, Society of Petroleum Engineers, Australian Society of Exploration Geophysicists (SA Branches)

Coordinates: 27 ° 7 ′ 0 ″  S , 142 ° 50 ′ 0 ″  E