Andreas Ruh 8/16/2021 4:16:09 AM |
References:
(1) Eugster, O., Lorenzetti, S., Kraehenbuehl, U., and Marti, K. 2007. Comparison of cosmic-ray exposure ages and trapped noble gases in chondrule and matrix samples of ordinary, enstatite, and carbonaceous chondrites. Meteoritics & Planetary Science 42, Nr 7/8, 1351*1371.
(2) Otto J., Loeken T., Weber H. W., and Schultz L. 1996. Gao, Guenie, Souma - One, two, or three falls? Meteoritics & Planetary Science 31: A103 - A104. |
Andreas Ruh 8/16/2021 4:12:20 AM |
Jon, I took a look to the cosmic-ray exposure ages of the two falls. Eugster et al. analyzed (among other chondrites) two samples of Nadiabondi. The analysis of matrix and 2 chondrules of the first sample yield average CRE ages around 65 - 74 Ma, whereas bulk analysis of the 2nd sample resultet in an (average) CRE Age of 20.3 Ma.
For Gao-Guenie CRE-ages of 1.8 Ma (all Guenie samples, and 2 Gao samples) and ~6 Ma (two Gao samples) were reported (J. Otto et al, 1995).
I would consider these sigificant differences in CRE ages as a proof that Nadiabondi was definitely a separate fall from Gao. But I do not have other publications in mind.
References:
(1) Eugster, O., Lorenzetti, S., Kr*henb*hl, U., Marti, K. 2007. Comparison of cosmic-ray exposure ages and trapped
noble gases in chondrule and matrix samples ...
(2) Otto J., Loeken T., Weber H. W., and Schultz L. 1996. Gao, G*eni*, Souma*One, two, or three falls? Meteoritics & Planetary Science 31: A103* A104. |
Jon Taylor 8/5/2021 1:42:25 PM |
I'm assuming they finally proved that Nadiabondi was definitely a separate fall from Gao, correct? I recall some ongoing debate in the past. Either way, a nice little individual! |
Mike Murray 7/27/2021 8:39:25 PM |
Nice little individual. Wow, looks just like Gao. |
Bernd Pauli 7/27/2021 5:07:44 AM |
HEINLEIN D. (1999) The meteorite shower of Nadiabondi, Burkina Faso (M! Nov. 1999, Vol. 5, No. 4, p. 20). |
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