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     Каталог импактных структур
    Главная » Статьи » Австралия » Достоверные

    Пиканини Австралия, З
    1. Алексеев А.С. и др. (1991). Оценки частоты падения небесных тел на Землю, исследование возможности заблаговременного их обнаружения и изменения траекторий. Отчёт по НИР, АН СССР ВЦ, Новосибирск , 128 с.
    2. (1988). Astronauts guide to terrestrial impact craters.. Space Shuttle Earth Observation Project, Lunar and Planetary Institute (March 1988).
    3. Graham, Bevan and Hutchison (1985). Catalogue of Meteorites. 4th Edition
    4. Haines P.W. (2005). Impact cratering and distal ejecta: the Australian record. Aus.Journal of Earth sciences. Vol.52, N.4/5. Aug./Oct. p.481-507
    5. Hodge, Paul W., (1994). Meteorite craters and impact structures of the Earth. Cambridge University Press , 122 рр.
    6. Jarmo Moilanen (2004). References.
    7. Osinski Gordon R. (2006). The geological record of meteorite impacts. 40th ESLAB First International Conference on Impact Cratering in the Solar System, 8-12 May 2006., Noordwijk,The Netherlands
    8. Thomas Kenkmann, Michael Poelchau (2007). Piccaninny, WA, and Matt Wilson, NT: Two possible complex impact craters in Australia. Goldschmidt Conference Abstracts 2007, Geochimica et Cosmochimica Acta, 71 (15): Suppl. S, Aug.2007, A477

    We present results of field analysis, microscopy, and remote sensing mapping of two circular structures in Australia of which the meteorite impact origin is not yet confirmed.
    Piccaninny, Western Australia (17 25'S, 128 26'E, 7.5 km diameter): The circular structure (Beere 1983; Shoemaker and Shoemaker, 1985) forms a plateau in the Purnululu National Park that is built up by Devonian conglomerates and sandstones. It is framed by beehive-like domes and the Piccaninny Gorge, both make the access to the elevated plain difficult. The structure is defined by a centerward dipping circular monocline (5-15Ь dip), a very gentle ring syncline, and a weak central rise with a stratigraphic uplift of 40-50 m. The distinct regional cleavage pattern outside the plateau displays a systematic deflection towards the center of the structure. On the plateau the vertical cleavage planes are reactivated as faults. These fault zones typically contain comminuted decimeter-wide gouge zones and meter-wide process zones in which anastomozing subsidiary fault networks occur. Some of the interconnected shear zones resemble breccia dikes. Strata are offset by faults. Minor strata tilting and the apparent lack of shock features suggest a considerable amount of erosion (>2 km) of the possible impact crater.
    known from other craters like Upheaval Dome or Spider (Scherler et al., 2006). The NE-SW trending symmetry axis is delineated by major faults. The fault pattern, preferred NE strata dipping in the central uplift, and the elliptical crater outline may indicate an oblique impact from NE.
    Acknowledgements: We would like to thank DFG for funding this project (KE 732-11/1).
    (Thomas Kenkmann, Michael Poelchau, 2007).


    Спутниковая фотография кратера из Google Earth.

    Bungle Bungle Ranges 4.




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