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Logoisk crater

Coordinates: 54°12′N 27°48′E / 54.200°N 27.800°E / 54.200; 27.800
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Logoisk crater
Logoisk crater is located in Belarus
Logoisk crater
Logoisk crater
Location of the crater in Belarus
Impact crater/structure
ConfidenceConfirmed
Diameter15 kilometres (9 mi)
AgeMiddle Eocene
42.3 ± 1.1 Ma
ExposedNo
DrilledYes
Location
Coordinates54°12′N 27°48′E / 54.200°N 27.800°E / 54.200; 27.800
CountryBelarus
MunicipalityLahojsk
A 5cm wide suevite(with white black and grey spots) from the impact crater at Lahojsk, Belarus
A suevite from the impact crater at Lahojsk, Belarus

Logoisk crater[a] or Logoisk astrobleme is a meteorite impact crater in Belarus near the city of Lahoysk.

It is 15 kilometers (9.3 mi) in diameter and is estimated to be 42.3 ± 1.1 million years old (Eocene). The crater is not exposed at the surface.[1]

The crater was discovered by an accident during a routine exploration drilling near the village of Kuzevichi [ru] in 1970s. A section was discovered with atypical materials in an unusual sequence: Quaternary deposits up to depth of 160m followed by a 230 meter thick layer of layered clays and lacustrine sediments followed by 240 meters of breccias, rocks previously unseen in the geology of Belarus. Three more drills made in 1976-1977 provided a clear evidence of the meteorite origin of the anomaly. Subsequent drillings mapped the crater.[2]During the period of intensive research it was suggested that the crater may contain diamonds formed due high temperature and pressure of the impact, but there has been no confirmation.[3]

Notes

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  1. ^ also Logoysk crater, Logoysk astrobleme, Logoisk impact structure, etc.

References

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  1. ^ "Logoisk". Earth Impact Database. Planetary and Space Science Centre University of New Brunswick Fredericton. Retrieved 2009-08-19.
  2. ^ Information about meteorite impact craters, Logoisk crater
  3. ^ Охман М.В. МЕТЕОРИТЫ НА ТЕРРИТОРИИ БЕЛАРУСИ

Further reading

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  • Sherlock, S. C., Kelley, S. P. , Glazovkaya, L., A New Age for the Logoisk Impact Structure, Berlarus and Implications for the Late Eocene Comet Shower, First International Conference on Impact Cratering in the Solar System. 2006
  • Glazovskaya, L. I., Impact transformation of the crystalline basement in the Logoisk astrobleme, Meteorite Impacts in Precambrian Shields. Programme and Abstracts, the 4th Workshop of the European Science Foundation IMpact Programme, Lappajarvi-Karikkoselka-Saaksjarvi, Finland, May 24–28, 2000. ed. J. Plado and L.J. Pesonen. 2000
  • Masaitis V. L. et al., The Logoysk Astrobleme, 1984
  • Глазовская Л.И., Громов Е.И., Парфенова О.В., Илькевич Г.И. Логойская астроблема. — М.: Наука, 1991. — 141 с., с ил.