Sudbury - Impact Deposit

Alternate Names N/A
Coordinates 48° 3' 36" N; 89° 30' 36" W
Notes
  1. Coordinates are based on sampling location in Addison et al., 2005
Country United States of America

Related Countries :
  1. Canada
  2. United States of America
Region Lake Superior region
Date Confirmed
Notes
  1. Dietz, 1964
Age (Ma) 1852.5 ± 51
Notes :
  1. This layer sits on the upper Gunflint tuff (1878 Ma) and below Rove volcanic ash (1836-1827 Ma), therefore the age is somewhere in that rage (Addison et al., 2005). This falls in line with the age of the Sudbury impact crater dated to be 1849.53 ± 0.21 by Davis, 2008.

Method :
  1. Zircon dating from surrounding layers
Impactor Type Unknown

Advanced Data Fields

Notes

Local Language
N/A
Spherules
Yes
Tektites
Unknown
Indivudual Glass Clasts
Unknown
Source Crater
Likely Sudbury impact crater (Addison et al., 2005)
Geology
Ejecta layer sits at the boundary of the Gunfint and Rove formations
  1. Addison et al., 2005
Other Shock Metamorphism
Feldspar grains
  1. Addison et al., 2005
Shatter Cones
No
Planar Fractures
Yes
  1. Addison et al., 2005
Planar Deformation Features
Yes
  1. Addison et al. 2005
Diaplectic Glass
No
Coesite
No
Stisovite
No

References

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Robert S Dietz (1964) Sudbury Structure as an Astrobleme, The Journal of Geology 72(4), p. 412-434, The University of Chicago Press, url, doi:10.1086/626999

W D Addison, G R Brumpton, D A Vallini, N J McNaughton, D W Davis, S A Kissin, P W Fralick, A L Hammond (2005) Discovery of distal ejecta from the 1850 Ma Sudbury impact event, Geology 33(3), p. 193-196, Geological Society of America, url, doi:10.1130/G21048.1

D W Davis (2008) Sub-million-year age resolution of Precambrian igneous events by thermal extraction-thermal ionization mass spectrometer Pb dating of zircon: Application to crystallization of the Sudbury impact melt sheet, Geology 36(5), p. 383-386, GeoScienceWorld, pdf, doi:10.1130/G24502A.1

T J Barrett, K Nagashima, G R Huss, J W Boyce, K L Robinson, D A Kring (2024) A chlorine isotope transect across Sudbury Basin (Canada) impact deposits reveals systematic isotope fractionation, Geology, url, doi:10.1130/G52624.1