High-precision 40Ar/39Ar age of the Jänisjärvi impact structure (Russia)

• Published in: Earth and Planetary Science Letters
• Main Authors: Jourdan, Fred, Renne, P., Reimold, U.
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: Elsevier Science BV 2008
• Subjects: Jänisjärvi; Target Rock; karelia*
• Online Access: https://hdl.handle.net/20.500.11937/5264; https://doi.org/10.1016/j.epsl.2007.10.043

The ~14 km diameter Jnisjrvi impact structure is located in Svecofennian Proterozoic terrain in the southeastern part of the Baltic shield, Karelia, Russia. Previous radioisotopic dating attempts gave K/Ar and 40Ar/39Ar ages of 700 ± 5 Ma and 698 ± 22 Ma, respectively, with both results being diffic...