High-precision 40Ar/39Ar age of the Jänisjärvi impact structure (Russia)
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...
| Main Authors: | , , |
|---|---|
| Format: | Journal Article |
| Published: |
Elsevier Science BV
2008
|
| Online Access: | http://hdl.handle.net/20.500.11937/5264 |