[meteorite-list] Improved dating process upsets timeline of Moon formation

[Michael Fowler]

"By making improvements to the standard isotopic techniques, we report here the age of crystallization of FAN 60025 using the 207Pb–206Pb, 147Sm–143Nd and 146Sm–142Nd isotopic systems to be 4,360 ± 3 million years." 

Hi Paul,

interesting research.  Would like you or someone to comment, as I can only read the abstract for free.  Regarding the crystallization age of "FAN 60025", does that mean they dated only one sample of the ferroan anorthosite?  If so, it is a lot of weight to put on only one sample.  

Mike Fowler
Chicago

> 
> Improved dating process upsets timeline of Moon formation 
> by Scott K. Johnson, Arstechnica, August 17, 2011. 
> http://arstechnica.com/science/news/2011/08/improved-dating-process-upsets-timeline-of-moon-formation.ars 
> 
> Time to rethink the Moon's formation by Lee Sweetlove 
> Nature News Blog, August 17, 2011 
> http://blogs.nature.com/news/2011/08/making_the_moon.html 
> 
> The paper is: 
> 
> Borg, L. E., J. N. Connelly, M. Boyet, and R. W. W. Carlson, 2011, 
> Chronological evidence that the Moon is either young or did 
> not have a global magma ocean. Nature. Published online, Aug. 17, 2011. 
> http://www.nature.com/nature/journal/vaop/ncurrent/full/nature10328.html 
> 
> Yours, 
> 
> Paul H.