TY - JOUR
T1 - Exposure history of the Torino meteorite
AU - Wieler, R.
AU - Graf, Th
AU - Signer, P.
AU - Vogt, S.
AU - Herzog, G. F.
AU - Tuniz, C.
AU - Fink, D.
AU - Fifield, L. K.
AU - Klein, J.
AU - Middleton, R.
AU - Jull, A. J.T.
AU - Pellas, P.
AU - Masarik, J.
AU - Dreibus, G.
PY - 1996/3
Y1 - 1996/3
N2 - 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 H6 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.
AB - 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 H6 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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U2 - 10.1111/j.1945-5100.1996.tb02022.x
DO - 10.1111/j.1945-5100.1996.tb02022.x
M3 - Article
AN - SCOPUS:0029750924
SN - 1086-9379
VL - 31
SP - 265
EP - 272
JO - Meteoritics and Planetary Science
JF - Meteoritics and Planetary Science
IS - 2
ER -