Colonia - Hypervelocity Impact Crater

Alternate Names
Local Language Colônia (in portuguese).
Coordinates 23° 52' 9" S; 46° 42' 32" W
Notes
  1. 40 km SW of São Paulo.
Country Brazil
Region São Paulo
Date Confirmed 2013
Buried? No
Drilled? Yes
Notes
  1. 2 drill holes to 142 and 197 m
Target Type Crystalline
Notes
  1. Various schists, gneisses and diorites.
Sub-Type Diorite, Gneiss, Schist
Apparent Crater Diameter (km) 3.6 km
Age (Ma) 2.5 - 36
Notes :
  1. In-filling sediments provide a minimum age of 2.5 Ma and maximum age of 5 to 36 Ma based on preservation (Riccomini et al., 2011).

Method :
  1. Stratigraphy
Impactor Type Unknown

Advanced Data Fields

Notes

Erosion
3
  1. Crater-fill products preserved (Riccomini et al., 2011) (Velazquez et al., 2014)
Final Rim Diameter
Unknown
Apparent Rim Diameter
3.6 km
  1. (Velázquez et al., 2014).
Rim Reliability Index
2
  1. (Velázquez et al., 2014).
Crater Morphology
Simple
Central Uplift Diameter
km
Central Uplift Height
Unknown
Uplift Reliability Index
2
Structural Uplift
Unknown
Thickness of Seds
Target Age
Precambrian
Marine
No
Impactor Type
Other Shock Metamorphism
Grain mosaicism, ballen silica, granular texture in zircon, kink-banded mica
  1. Petrographic characterisation of the polymictic allochthonous breccia reveals a series of distinctive shock metamorphic features, including...ballen silica, granular texture in zircon" (Velazquez et al. 2013).
Shatter Cones
No
Planar Fractures
Yes
  1. The intragranular microfractures are formed by several short planar fractures with different orientations" via (Velazquez et al., 2013).
Planar Deformation Features
Yes
  1. (Velazquez et al., 2013).
Diaplectic Glass
No
Coesite
No
Stisovite
No
Crater Fill
LB, MB, M, S
  1. The presence of Precambrian rock fragments in the mud suggests the lower section to be a fanglomeratic deposit derived from elevated parts of the inner rim, probably related to the...occurrence of a crater-fill breccia" (Riccomini et al., 2011). Allochthonous crater-fill deposits, include melt-bearing breccias, melt rocks and lithic breccias. Spherules up to 2 mm in diamater occur inside the crater (Velázquez et al., 2014) (Velázquez et al., 2017).
Proximal Ejecta
Distal Ejecta
Dykes
Volume of Melt
Depth of Melting

References

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R Kollert, Björn Bergman, A Davino (1961) Estudos preliminares de uma depressão circular na região de Colônia: Sto. Amaro, São Paulo, Boletim da Sociedade Brasileira de Geologia 10, p. 57-77

R Kollert, A B Ornberg, A Davino (1961) Estudos Preliminares de Circular na Regiao Sto. Amaro, Sao por Uma Depressxo de Colonia: Paulo.(*)

U S Motta, J M Flexor (1991) Estudo gravimétrico da depressão circular de Colônia, São Paulo, Brasil, Anais, 2º Congresso Internacional da Sociedade Brasileira de Geofísica, Salvador, p. 140– 142

C Riccomin, B Turcq, L Martin, M Z Moreira, M L Lorscheitter (1991) The Colonia Astrobleme, Brasil 12(2), p. 87-94

F A Neves (1998) Estudo da depressão circular de Colônia, SP, pelo método sísmico, Revista Brasileira de Geociências 28, p. 3-10

F A Neves (1998) Estudo da Depressao Circular de Colonia-sp Pelo Metodo Sismico, p. 3-10

C Riccomini, Alvaro P Crósta, R L Prado, M P Ledru, B J Turcq, L G Sant'Anna, J A Ferrari, W U Reimold (2011) The Colônia structure, São Paulo, Brazil, Meteoritics and Planetary Science 46(11), p. 1630-1639, doi:10.1111/j.1945-5100.2011.01252.x

V F Velázquez, C Riccomini, J M A Sobrinho, M A J S Pletsch, A E M Sallun, W S Filho, J Hachiro (2013) Evidence of Shock Metamorphism Effects in Allochthonous Breccia Deposits from the Colonia Crater, Sao Paulo, Brazil, International Journal of Geosciences 04(01), p. 274-282, Scientific Research Publishing, Inc,, doi:10.4236/ijg.2013.41a025

M Antonio, M A C Chamani, C M Chiessi, S Mulitza, J Groeneveld, A R Perretti, A Luiza, S Albuquerque, I M V Oliveira, Alvaro P Crósta, W U Reimold, C Riccomini, C Koeberl (2014) Recognizing impact-triggered soft sediment deformation: problems and possible guidelines. The use of stable oxygen isotopes in the western South Atlantic paleoceanography: Recent achievements and future research directions in the framework of the Colônia, url

V F Velázquez, J Colonna, A E Martins Sallun, J Maria Azevedo Sobrinho, W Sallun Filho, P C A Paiva (2014) The colônia impact crater: Geological heritage and natural patrimony in the southern metropolitan region of são paulo, brazil, Geoheritage 6(4), p. 283-290, Springer Verlag, doi:10.1007/s12371-014-0121-0

P E De Oliveira, V Brito de Medeiros, L R Carlos Pessenda, M Judite Garcia, J Antonio Ferrari, F Jourdan (2014) Vegetation and Climate of the Atlantic Rainforest of the State of São Paulo during the Late Pleistocene and Holocene Spectral analysis of sedimentary records Dating the Colonia impact crater (and its sediments?)

R L Prado, Alvaro P Crósta, C Riccomini, L Gomes, S Anna (2014) Seismic Reflection Investigation at Colonia Structure Sedimentology and mineralogy of Colônia Crater deposits: what we know and implications

A Henrique Bezerra dos Santos, Déborah de Oliveira (2015) Revista Brasileira de Geomorfologia v 16, p. 4, url

G C M Miura, R P Z Santos, Y R Marangoni (2015) Investigação geofísica da cratera de Colônia

M P Ledru, W U Reimold, D Ariztegui, E Bard, Alvaro P Crósta, C Riccomini, A O Sawakuchi (2015) Why deep drilling in the Colônia Basin (Brazil)?, Scientific Drilling 20, doi:10.5194/sd-20-33-2015

I Ullah, R L Prado (2017) Soft sediment thickness and shear-wave velocity estimation from the H/V technique up to the bedrock at meteorite impact crater site, Sao Paulo city, Brazil, Soil Dynamics and Earthquake Engineering 94, p. 215-222, Elsevier Ltd, doi:10.1016/j.soildyn.2017.01.015

V F Velázquez, R F Lucena, J M A Sobrinho, A E M Sallun, W S Filho (2017) Petrographic Investigation of Target Rock Transformation under High Shock Pressures from the Colônia Impact Crater, Brazil, Earth Science Research 7(1), p. 13, Canadian Center of Science and Education, doi:10.5539/esr.v7n1p13

S Staffieri, A Coletta, M L Battagliere, M Virelli (2019) Colonia, Brazil, Encyclopedic Atlas of Terrestrial Impact Craters, p. 663-664, Springer International Publishing, doi:10.1007/978-3-030-05451-9_184

R L Prado, I C Espin Fenoll, I Ullah, G C M Miura, Alvaro P Crósta, R P Zanon dos Santos, W U Reimold, V R Elis, E Imbernon, C Riccomini, L A Diogo (2019) Geophysical investigation of the Colônia structure, Brazil, Meteoritics and Planetary Science 54(10), p. 2357-2372, University of Arkansas, doi:10.1111/maps.13292