L-chondrite asteroid breakup tied to Ordovician meteorite shower by multiple isochron 40Ar-39Ar dating
@article{Korochantseva2007LchondriteAB, title={L-chondrite asteroid breakup tied to Ordovician meteorite shower by multiple isochron 40Ar-39Ar dating}, author={E. V. Korochantseva and M. Trieloff and C. A. Lorenz and A. I. Buykin and M. Ivanova and W. Schwarz and J. Hopp and E. Jessberger}, journal={Meteoritics & Planetary Science}, year={2007}, volume={42}, pages={113-130} }
Radiochronometry of L chondritic meteorites yields a rough age estimate for a major collision in the asteroid belt about 500 Myr ago. Fossil meteorites from Sweden indicate a highly increased influx of extraterrestrial matter in the Middle Ordovician ~480 Myr ago. An association with the L-chondrite parent body event was suggested, but a definite link is precluded by the lack of more precise radiometric ages. Suggested ages range between 450 ± 30 Myr and 520 ± 60 Myr, and can neither… CONTINUE READING
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