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Author Topic:   Radioactive carbon dating
Coragyps
Member (Idle past 760 days)
Posts: 5553
From: Snyder, Texas, USA
Joined: 11-12-2002


(1)
Message 34 of 221 (396126)
04-18-2007 11:06 PM
Reply to: Message 27 by ArchArchitect
04-18-2007 10:35 PM


Re: A Glitch In Carbon Dating
A basic property of Carbon14 is that under extreme heat, it decays even faster,
Absolutely unsupported bullshit. And nonsense. High-school physics stuff, at that - if not 8th-grade General Science.
Chemical reactions vary their rates with heat.
Nuclear reactions don't, at least in the range of temperatures available on a planet. Heat rhenium up enough to strip all its electrons, and yeah, beta decay gets faster. But that's interior-of-stars stuff, with no relevance at all to carbon dating.

This message is a reply to:
 Message 27 by ArchArchitect, posted 04-18-2007 10:35 PM ArchArchitect has replied

Replies to this message:
 Message 36 by ArchArchitect, posted 04-18-2007 11:10 PM Coragyps has replied

  
Coragyps
Member (Idle past 760 days)
Posts: 5553
From: Snyder, Texas, USA
Joined: 11-12-2002


(1)
Message 37 of 221 (396131)
04-18-2007 11:11 PM
Reply to: Message 36 by ArchArchitect
04-18-2007 11:10 PM


Re: A Glitch In Carbon Dating
Not suggesting, asserting. If you were taught that, you were fed bullshit.

This message is a reply to:
 Message 36 by ArchArchitect, posted 04-18-2007 11:10 PM ArchArchitect has replied

Replies to this message:
 Message 39 by ArchArchitect, posted 04-18-2007 11:15 PM Coragyps has not replied

  
Coragyps
Member (Idle past 760 days)
Posts: 5553
From: Snyder, Texas, USA
Joined: 11-12-2002


Message 105 of 221 (407144)
06-24-2007 3:04 PM
Reply to: Message 104 by fooj
06-24-2007 2:40 PM


Re: Two types of nuclides and Potassium Argon dating
Ewww. The article says "Nuclear stability is possiblre because the particles in the nucleus are each tiny magnets...."
That's not even close. The rest of it is a bit suspect if we start with a complete fib, don't you think?

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Coragyps
Member (Idle past 760 days)
Posts: 5553
From: Snyder, Texas, USA
Joined: 11-12-2002


Message 115 of 221 (407182)
06-24-2007 9:46 PM
Reply to: Message 114 by fooj
06-24-2007 9:25 PM


Re: A response to various criticisms
I was saying since its half-life at triple point is long compared to other isotopes.
You have not the remotest clue what you're talking about, do you? What is the triple point of potassium - pressure and temperature? Is elemental potassium common in magma?

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Coragyps
Member (Idle past 760 days)
Posts: 5553
From: Snyder, Texas, USA
Joined: 11-12-2002


Message 120 of 221 (407232)
06-25-2007 8:49 AM
Reply to: Message 117 by fooj
06-24-2007 10:33 PM


Re: A response to various criticisms
Dr.Henke thinks Steve Austin somehow included old rock in his dating by accident. Somehow, I doubt it.
Well, yeah, I doubt that it was "by accident," too. It appears to have been carefully premeditated by Austin to get "erroneous" dates that he could write about....

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Coragyps
Member (Idle past 760 days)
Posts: 5553
From: Snyder, Texas, USA
Joined: 11-12-2002


Message 133 of 221 (407305)
06-25-2007 4:40 PM
Reply to: Message 128 by fooj
06-25-2007 4:14 PM


Re: A response to various criticisms
but given it's stone structures, I would say it isn't as old as the argon-argon date.
They didn't date the structures! They dated the ash that fell on the structures! And what "isn't as old as the argon-argon date?" We know the minimum age of the ruins at Pompeii from history - and from the ash signature in the ice in Greenland, for that matter.

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Coragyps
Member (Idle past 760 days)
Posts: 5553
From: Snyder, Texas, USA
Joined: 11-12-2002


Message 136 of 221 (407308)
06-25-2007 4:45 PM
Reply to: Message 131 by fooj
06-25-2007 4:33 PM


Re: A response to various criticisms
I'd prefer not to discuss this issue anymore though.
I can imagine so.........

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Coragyps
Member (Idle past 760 days)
Posts: 5553
From: Snyder, Texas, USA
Joined: 11-12-2002


Message 140 of 221 (407313)
06-25-2007 5:00 PM
Reply to: Message 138 by fooj
06-25-2007 4:47 PM


Re: Two types of nuclides and Potassium Argon dating
How the potassium is made in the magma is a good question...
It isn't "made" there. It was made in a star (or a couple of them) that contributed dust to our star system when it coalesced 4.6 billion years ago. It got collected into minerals when our planet formed, and melted into magma at some time since then.
Perhaps they failed to mention that the k40 atom would be a second stage of decay.
"Second stage of decay" from what, pray tell? Scandium 44 won't hunt - it decays by electron capture. Spontaneous fission of strontium-80, maybe, with all the atoms splitting evenly? I wonder why the nuclear physicists since the Curies never noticed that?
Oh....'cause it doesn't happen.

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Coragyps
Member (Idle past 760 days)
Posts: 5553
From: Snyder, Texas, USA
Joined: 11-12-2002


Message 190 of 221 (529962)
10-11-2009 10:20 AM
Reply to: Message 189 by Dr Jack
10-11-2009 9:10 AM


Re: Are isotopes chemically indifferable
You are correct, Mr. Jack - heavier isotopes do react more slowly in most situations, purely because they're "fatter" and have more inertia. Like me now and me at twenty. The Manhattan Project's biggest challenge was building those huge diffusion cells to seperate uranium-235 for bombs from the main isotope, U-238. The effects are pretty small in nature with, say, carbon 12 and 13, but they're measurable.

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Replies to this message:
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Coragyps
Member (Idle past 760 days)
Posts: 5553
From: Snyder, Texas, USA
Joined: 11-12-2002


Message 203 of 221 (560025)
05-12-2010 4:21 PM
Reply to: Message 198 by dennis780
05-12-2010 12:55 AM


Re: dating game
Scientists have found fossilized lobster shells from lobsters that are STILL ALIVE. Carbon dating claimed them to be over a thousand years old. But the lobster was still ALIVE.
Really? Where was that published? I'll trade you some actual citations to scientific publications on fictitious 14C dates on snails and other mollusks if you'll give me one on petrified live lobsters.....

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