The Lappajärvi impact structure (Finland): Age, duration of crater cooling, and implications for early life
An in-depth approach of 40Ar/39Ar dating of the ~23 km Lappajärvi impact structure (Finland) was performed using carefully selected single-grain aliquots of optically fresh, clast-poor, impact melt rock and recrystallized K-feldspar melt particles separated from impact-metamorphosed granite pegmatit...
| Main Authors: | , |
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| Format: | Journal Article |
| Published: |
Pergamon-Elsevier Science Ltd
2013
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| Online Access: | http://hdl.handle.net/20.500.11937/9866 |