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Aorounga
Crater Name |
Location |
Latitude |
Longitude |
Diameter (km) |
Age (Ma)* |
Exposed |
Drilled |
Target Rock** |
Bolide Type*** |
Aorounga |
Chad, Africa |
N 19° 6' |
E 19° 15' |
12.6 |
<345 |
Y |
N |
S |
- |
Landsat
map
DEM Image Provided by Dr. Carlos Roberto de Souza Filho
Image Provided by Dr. Carlos Roberto de Souza Filho
Image Provided by Dr. Carlos Roberto de Souza Filho
References 1. Becq-Giraudon, J. -F., Rouzeau, O., Goachet, E. and Solages,S., Meteoritic impact origin of the annular depression of Aorounga, Chad (Africa). C. R. Acad. Sci. Paris, t. 315, série II, p. 83-88. 1992. 2. Cockell, C. S., Lee, P., The Biology of Impact Craters - a review. Biol. Rev., 77, P. 279 - 310. 2002. 3. Hörz, F., Ejecta of the Ries crater, Germany. The Geological Society of America Special Paper 190, pp. 39-55. 1982. 4. Koeberl, C., Reimold, W. U. , Cooper, G. , Cowan, D. and Vincent, P. M., Aorounga and Gweni Fada impact structures, Chad: Remote sensing, petrography, and geochemistry of target rocks, Meteoritics & Planetary Science, 40, No 9/10 P. 1455 - 1471. 2005. 5. Koeberl, C., Reimold, W.U., Vincent, P. M., Brandt,D., Aorounga and Gweni Fada Impact Structures, Chad, Central Afr.: Petrology and Geochemistry of Target Rocks, LPSC XXIX, Lunar and Planetary Institute, Houston, TX, (CD-ROM). 1998. 6. Koeberl, C., African meteorite impact craters: Characteristics and geological importance. Journal of African Earth Sciences, v. 18, pp. 263-295. 1994. 7. McHone J.F., Greeley, R., More impact and impact-like structures on the SIR-C radar; Europe, Africa, and Arabian Peninsula (abstract). Lunar and Planetary Science XXVIII, pp. 915-916. 1997. 8. McHone, J. F., Blumberg, D.G., Greeley, R. and Underwood, J.R.,Jr., Space shuttle radar images of terrestrial impact structures: SIR-C/X-SAR (abstract). Meteoritics, v. 30, pp. 543. 1995. 9. Miallier, D., Sanzelle, S., Falgueres, C., Fain, J., Pilleyre, Th. And Vincent,P.M., TL and ESR of quartz from the astrobleme of Aorounga (Sahara of Chad), Quaternary Science Reviews, Vol 16 (3-5), pp. 265-274. 1997. 10. Ocampo, A. C., Pope, K. O., Shuttle Imaging Radar (SIR-C) Images Reveal Multiple Impact Craters at Aorounga, Northern Chad, 27th Lunar and Planetary Science Conference. 1996. 11. Vincent, P. M., Beauvilain, A., Boudeulle, M. and Moutaye,A.H., The astrobleme of Aorounga (Sahara of Tchad): Preliminary structural data (abstract). European Science Foundation, Third International Workshop. Shock Wave Behaviour of Solids in Nature and Experiments, Limoges, France. 1994.
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* pre-1977 K-Ar, Ar-Ar and Rb-Sr ages recalculated using the decay constants of Steiger and Jager (1977) Ages in millions of years (Ma) before present.
** Abbreviations: C - Crystalline Target; C-Ms - Metasedimetary Target; M - Mixed Target (i.e.sedimentary strata overlying crystalline basement); S - sedimentary target (i.e. no crystalline rocks affected by the impact event). From Osinski. G. R., Spray J. G., and Grieve R. A. F. 2007. Impact melting in sedimentary target rocks: A synthesis. In The Sedimentary Record of Meteorite Impacts, Geological Society of America Special Paper. Editors: Evans K. Horton W., King D., Morrow J., and Warme J. Geological Society of America: Boulder, in press.
*** From Koeberl,C. Identification of meteoritic components in impactites. 1998, Koeberl, C. The Geochemistry and Cosmochemistry of Impacts. 2007 and PASSC Files.
(IAB, IIIAB, IIIB, IIID - Iron Meteorite)
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