Exposure history of the Torino meteorite

Details Exposure history of the Torino meteorite Exposure history of the Torino meteorite

Mar 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996m%26ps...31..265w&link_type=abstract

Meteoritics and Planetary Science, Vol. 31, p. 265-272 (1996)

Physics

19

Scientific paper

We determined He, Ne, Ar, 10Be, 26Al, 36Cl, and 14C concentrations, as well as cosmic-ray track densities and halogen concentrations in different specimens of the 116 chondrite Torino, in order to constrain its exposure history to cosmic radiation. The Torino meteoroid had a radius of ˜20 cm and travelled in interplanetary space for 2.5-10 Ma. Earlier, Torino was part of a larger body. The smallest possible precursor had a radius of 55 cm and a journey through space longer than ˜65 Ma. If the first-stage exposure took place in a body with a radius of >3 m or in the parent asteroid, then it lasted nearly 300 Ma. The example of Torino shows that it is easy to underestimate First-stage exposure ages when constructing two-stage histories.

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