Araguainha
| Crater Name | Location | Latitude | Longitude | Diameter (km) | Age (Ma) | Exposed | Drilled | Target Rock** | Bolide Type*** |
|---|---|---|---|---|---|---|---|---|---|
| Araguainha | Brazil | S 16° 47' | W 52° 59' | 40 | 254.7 ± 2.5 | Y | N | M | - |
1. Landsat image
2. Landsat Thematic Mapper RGB (bands 4,5,3)
3. DEM image Provided by Dr. Carlos Roberto de Souza Filho
4 & 5. Image Provided by Dr. Carlos Roberto de Souza Filho
References |
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Bland, P. A., Artemieva, N. A. , de Souza Filho, C.R., The Production Rate of Small Craters on Earth, and the Expected Crater Population in South America. 67th Annual Meteoritical Society Meeting. 2004. |
Buhl, D., Deutsch, A and Langenhorst,F., On the significance of ages for impact melts: New RB-Sr and Sm-Nd data for Dellen (Sweden) and Araguainha (Brazil) (abstract). Meteoritics, v. 25, p. 352. 1990. |
Crosta, A. P., Araguainha Dome. The largest astrobleme in South America, published on the internet at the address: www.unb.br/ig/sigep/sitio001/sitio001english.htm. 1999. |
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Deutsch, A., Buhl, D. and Langenhorst,F., Rb-Sr and Sm-Nd-dating of impact melts: Dellen (Sweden) and Araguainha (Brazil) (abstract). Pesonen, L.J. and Niemisara, H., eds., Symposium Fennoscandian Impact Structures, p. 36. 1990. |
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Grieve, R. A. F., The record of impact on Earth: Implications for a major Cretaceous/Tertiary impact event. Geological Society of America, Special Paper 190, pp. 25-37. 1982. |
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Hammerschmidt, K., Engelhardt, W. v., 40Ar/39Ar dating of the Araguainha impact structure, Mato Grosso, Brazil. Meteoritics, v. 30, pp. 227-233. 1995. |
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Tong, C.H., et al., Geoelectric evidence for centripetal resurge of impact melt and breccias over central uplift of Araguainha impact structure, Geology, v. 38, pp. 91-94, 2010 |
| * 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 - Metasedimentary 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) |