Serra da Cangalha - Hypervelocity Impact Crater

Alternate Names N/A
Coordinates 8° 4' 49" S; 46° 51' 29" W
Notes
  1. Southern limb of the Amazon basin in NE Brazil, 45 km SW of the Riachao Ring.
Country Brazil
Region Tocantins
Date Confirmed 1979
Notes
  1. Evidence of shock metamorphism (shatter cones) found (McHone, 1979). Noted as probable but did not have evidence earlier (Dietz and French, 1973).
Buried? No
Drilled? Yes
Notes
  1. A Brazilian government drilling expedition has cored three test wells to a depth of 200 m that penetrate vertically oriented shales, as seen on the surface (McHone, 1979).
Target Type Sedimentary
Notes
  1. Devonian to Permian sandstones and shales (McHone, 1979).
Sub-Type Mudstone, Sandstone, Shale
Apparent Crater Diameter (km) 13.7 km
Age (Ma) ≤250
Notes :
  1. ≤250 Ma based on stratigraphic age constraints (Late Permian or younger) (Kenkmann et al., 2011). The youngest rocks involved in the deformation are Permian/Carboniferous sandstones of the central uplift mountains (Crosta, 1987). *Minimum age is poorly constrained and is estimated based on erosion.

Method :
  1. Stratigraphy
Impactor Type Unknown

Advanced Data Fields

Notes

Local Language
N/A
Erosion
7
  1. The crater floor has been removed and the substructure is exposed (McHone, 1979).
Final Rim Diameter
Unknown
Apparent Rim Diameter
13.7 km
  1. Crater diameter is 13.7 km (Kenkmann et al., 2011). (Dietz and French, 1973) (Crosta, 1985)
Rim Reliability Index
1
  1. A ring of steep hills surrounds the central depression (uplift has central depression due to preferential erosion). Outside the ring of hills lies a 4 km wide band of outward dipping beds that form an outer ring trough (McHone, 1979). Central uplift diameter is 5.8 km. The lower limit for stratigraphic uplift is 700 m (Kenkmann et al., 2011).
Crater Morphology
Complex
Central Uplift Diameter
5.8 km
Central Uplift Height
250 m
Uplift Reliability Index
4
Structural Uplift
700 m
Thickness of Seds
Unknown
Target Age
Palaeozoic
Marine
No
Impactor Type
Unknown
Other Shock Metamorphism
Feather features
  1. (Crosta and Reimold, 2017)
Shatter Cones
Yes
  1. Shatter cones in central uplift, in conglomerate (McHone, 1979). Shatter cones in boulders (McHone, pers. comm., 2010). Shatter cones occur within the inner depression of the central uplift; A small outcrop of sandstone with several cm sized shatter cones was observed (Vasconcelos et al., 2010).
Planar Fractures
Yes
  1. (Crosta and Reimold, 2017)
Planar Deformation Features
Yes
  1. (Crosta and Reimold, 2017)
Diaplectic Glass
No
Coesite
No
Stisovite
No
Crater Fill
Unknown
  1. The structure has been eroded below the crater floor (McHone, 1979). Rare outcrops of monomict and polymict breccias are found in the periphery of the central uplift, but it can not be confirmed that they are crater-fill impactites (Kenkmann et al., 2011).
Proximal Ejecta
Unknown
Distal Ejecta
Unknown
Dykes
Unknown
Volume of Melt
Unknown
Depth of Melting
Unknown

References

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R S Dietz, B M French (1973) Two new astroblemes (one definite, one probable) in Brazil, Abstracts with Programs - Geological Society of America 5(7), p. 598, Geological Society of America (GSA), Boulder, CO, url

J R McHone Jr, R S Dietz (1978) Two probable astroblemes in Brazil, Abstracts with Programs - Geological Society of America 10(3), p. 116,137, Geological Society of America (GSA), Boulder, CO, url

R S Dietz, J F Jr McHone (1979) Volcanic landforms and astroblemes, Apollo-Soyuz Test Project Summary Science Report — NASA Special Publication 412 2(SP-412), F El-Baz, D M Warner (ed.), p. 183-192, Houston: NASA Lyndon B. Johnson Space Centre, url

J F Jr McHone (1979) Riachão Ring, Brazil: A possible meteorite crater discovered by the Apollo astronauts, Apollo-Soyuz Test Project Summary Science Report — NASA Special Publication 412 2, Farouk El-Baz, D M Warner (ed.), p. 193-202, National Aeronautics and Space Administration (NASA), Washington, DC, url

R A F Grieve (1982) The record of impact on Earth: Implications for a major Cretaceous/Tertiary impact event, Geological Society of America 190(Special Paper), p. 25-37, url

Y P Gurov, Y P Gurova (1987) Impact structures on the Earth's surface, Geologicheskiy Zhurnal 47(1), p. 117-124, Naukova Dumka, Kiev, url

W U Reimold, G R J Cooper, R Romano, D R Cowan, C Koeberl (2004) A SRTM investigation of Serra da Cangalho impact structure, Brazil, Abstracts of Papers Submitted to the Lunar and Planetary Science Conference 35, p. unpaginated, Lunar and Planetary Science Conference, Houston, TX, url

A A Adepelumi, S L Fontes, P A Schnegg, J M Flexor (2005) An integrated magnetotelluric and aeromagnetic investigation of the Serra da Cangalha impact crater, Brazil, Physics of the Earth and Planetary Interiors 150(1-3), Yasuo Ogawa, Andreas Junge, Alan G Jones (ed.), p. 159-181, Elsevier, Amsterdam, url, doi:http://dx.doi.org/10.1016/j.pepi.2004.08.029

W U Reimold, G R J Cooper, R Romano, D R Cowan, C Koeberl (2006) Investigation of Shuttle Radar Topography Mission data of the possible impact structure at Serra da Cangalha, Brazil, Meteoritics & Planetary Science 41(2), p. 237-246, Meteoritical Society, Fayetteville, AR, url

M A R Vasconcelos, A M Goes, A P Crósta, T Kenkmann, W U Reimold (2010) Serra da Cangalha impact structure, Parnaiba Basin, northeastern Brazil; target characterization and stratigraphic estimates of uplift, Abstracts of Papers Submitted to the Lunar and Planetary Science Conference 41, p. Abstract 1868, Lunar and Planetary Science Conference, Houston, TX, url

T Kenkmann, M A R Vasconcelos, Alvaro P Crósta, W U Reimold (2010) Serra da Cangalha, Tocantins, Brazil; insights to the structure of a complex impact crater with an overturned central uplift, Abstracts of Papers Submitted to the Lunar and Planetary Science Conference 41, p. Abstract 1237, Lunar and Planetary Science Conference, Houston, TX, url

T Kenkmann, M A R Vasconcelos, A P Crósta, W U Reimold (2011) The complex impact structure Serra da Cangalha, Tocantins State, Brazil, Meteoritics & Planetary Science 46(6), p. 875-889, Meteoritical Society, Fayetteville, AR, url, doi:http://dx.doi.org/10.1111/j.1945-5100.2011.01199.x

M A R Vasconcelos, E P Leite, A P Crósta (2012) Contributions of gamma-ray spectrometry to terrestrial impact crater studies: The example of Serra da Cangalha, northeastern Brazil, Geophysical Research Letters 39(4), url, doi:10.1029/2011GL050525

M. A.R. Vasconcelos, K. Wünnemann, A. P. Crósta, E. C. Molina, W. U. Reimold, E. Yokoyama (2012) Insights into the morphology of the Serra da Cangalha impact structure from geophysical modeling, Meteoritics and Planetary Science 47(10), doi:10.1111/maps.12001

M A R Vasconcelos, Alvaro P Crósta, W U Reimold, A M Goes, T Kenkmann, M H Poelchau (2013) The Serra da Cangalha impact structure, Brazil: Geological, stratigraphic and petrographic aspects of a recently confirmed impact structure, Journal of South American Earth Sciences 45, p. 316-330, Elsevier, Oxford, url, doi:http://dx.doi.org/10.1016/j.jsames.2013.03.007

M Di Martino, A Coletta, M L Battagliere, M Virelli (2019) Serra Da Cangalha, Brazil, Encyclopedic Atlas of Terrestrial Impact Craters, p. 681-683, Springer, Cham, url, doi:https://doi.org/10.1007/978-3-030-05451-9_188

Adekunle A. Adepelumi, Jean M. Flexor, Sergio L. Fontes, Pierre A. Schnegg (2020) Interpretation of the aeromagnetic signatures of the Serra da Cangalha impact crater, doi:10.3997/2214-4609-pdb.168.arq_158