Chukcha - Hypervelocity Impact Crater

Alternate Names Chykcha
Local Language
Coordinates 75° 38' 59" N; 98° 35' 17" E
Notes
  1. Near Chukcha River in the Tamirs.
Country Russia
Region Taymyr
Date Confirmed 1992
Notes
  1. PDFs in quartz (Vishnevskiy, 1992).
Buried? No
Notes
  1. Partially filled by Neogene-Quaternary deposits.
Drilled? Yes
Notes
  1. Many drill holes in and around the crater (Vishnevsky, 1992).
Target Type Mixed
Notes
  1. Mixed Riphean shales, carbonates and schists (Vishnevsky, 1992).
Sub-Type Carbonate, Schist, Shale
Apparent Crater Diameter (km) 6 km
Age (Ma) <70
Notes :
  1. Late Cretaceous to Early Palaeogene, based on geomorphology (Vishnevsky, 1992) (Vishnevsky, 1995).

Method :
  1. Geomorphology
Impactor Type Unknown

Advanced Data Fields

Notes

Erosion
5
  1. Deeply eroded to below crater-fill; only part of the "lower structural layer" has been preserved (Vishnevsky, 1992).
Final Rim Diameter
Unknown
Apparent Rim Diameter
6 km
  1. (Vishnevsky, 1992)
Rim Reliability Index
2
  1. Crater is bowl-shaped form with central peak but no crater rim or most of impact facies (Vishnevsky, 1992). Depression is 6km in diameter with central mount of 1 km in diameter and 30m high (Vishnevsky, 1995).
Crater Morphology
Complex
Central Uplift Diameter
1km
Central Uplift Height
30 m
Uplift Reliability Index
2
Structural Uplift
Unknown
Thickness of Seds
Target Age
Precambrian
Marine
No
Impactor Type
Other Shock Metamorphism
No
Shatter Cones
No
  1. No shatter cones occur (Vishnevsky, 1995).
Planar Fractures
Yes
  1. PF along {1101} and {3253} (Vishnevsky, 1995)
Planar Deformation Features
Yes
  1. PDF (omega, pi) in quartz (Vishnevsky, 1992). PDF along {1013} and {1012} (Vishnevsky, 1995).
Diaplectic Glass
No
Coesite
No
Stisovite
No
Crater Fill
  1. Crater-fill impactites are not preserved. Megabreccias (brecciated basement rocks) in the central mount (Vishnevsky, 1992) (Vishnevsky, 1995).
Proximal Ejecta
Distal Ejecta
Dykes
Volume of Melt
Depth of Melting

References

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S A Vishnevsky (1993) Deeply-eroded astroblemes, soft and hard target rocks examples: Scarce data and some problems of recognition, "Impact Cratering and Evolution of Planet Earth", European Science Foundation, First International Workshop, Nördlingen Germany

S A Vishnevsky (1995) The Chykcha impact crater, Taymyr peninsula Heavily eroded astrobleme of (K2-Pg1) age, Meteoritical Society

G Komatsu, A Coletta, M L Battagliere, M Virelli (2019) Chukcha, Russia, Encyclopedic Atlas of Terrestrial Impact Craters, p. 139-140, Springer International Publishing, doi:10.1007/978-3-030-05451-9_29