But Chuck, don't you understand that the half-lives are variable on YEC
"principles"? Consequently, your claims do not hold.
On Thu, 23 Aug 2001 23:46:28 -0400 "Vandergraaf, Chuck"
> Thanks for the reference. Trouble is, I don't have ready access to
> To me, the Oklo phenomenon can only be explained if one assumes that
> earth much older than YEC's would claim. Briefly, a nuclear chain
> can only be sustained if 1)the 235/238U is higher than at present
> compared to the current <0.8%) or 2) a moderator such as D2O is
> present. The
> U deposit at Oklo shows unmistakable signs of fission: rare earth
> products show an isotopic signature closer to that of fission
> there is eveidence of 99Tc (which is only produced in the fissioning
> process), and the 235U is depleted considerably, to values as low as
> If the fission process did take place, the 235/238U must have been
> higher than present, in the order of 2% and that can only have been
> the case
> ~10^9 years ago because the half life of 235U is shorter than that
> of 238U.
> The Cigar Lake U deposit is younger and never had a sufficiently
> 235/238U ratio.
> This, to me, clearly swings the evidence to an old earth but, as a
> scientist, my mind is open for alternative interpretations.
> -----Original Message-----
> From: Allen Roy [mailto:firstname.lastname@example.org]
> Sent: Thursday August 23, 2001 8:18 PM
> To: Vandergraaf, Chuck
> Subject: Re: Response to Why YEC posting
> I personally don't know much about the Oklo reactor, however I found
> article by a YEC on the topic.
> "Oklo Uranium Reactor Examined From a Creationist's Viewpoint"
> appears in the Creation Research Society Quarterly Vol.19, No.1
> (June, 1982)
> pgs32-35 by Eugene Chaffin
> ----- Original Message -----
> From: Vandergraaf, Chuck <email@example.com>
> To: 'Allen Roy' <firstname.lastname@example.org>
> Cc: <email@example.com>
> Sent: Wednesday, August 22, 2001 12:34 PM
> Subject: RE: Response to Why YEC posting
> Please explain, using a "young earth model," how natural fission
> e.g., @ Oklo, Gabon, could have operated while other U deposits with
> [U], e.g., Cigar Lake, did not.
> Chuck Vandergraaf
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