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Attached are the scans of both cyrtolites from South Platte.? The latest also has the id of thorite.

So is it fair to say that that Hf, Zr, and Th are common in cyrtolites because of substitution?? Also, is the Y due to the xenotime?

I am now scanning the cyrtolite from Cactus Jack.

Charles

On Tue, Jan 21, 2020 at 8:24 PM Charles David Young <charlesdavidyoung@...> wrote:

Thanks, Steve!? Hm, what is impressive? I have some 99% zirconium.? Is that what you mean by a standard?

Charles

On Tue, Jan 21, 2020 at 7:46 PM WILLIAM S Dubyk <sdubyk@...> wrote:

Charles, you should have it QA'ed by someone else, but wow, that is impressive. Do you have a zirconium standard? I've got a zirconium disc if you need one.

Steve

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From: [email protected] <[email protected]> on behalf of Charles David Young <charlesdavidyoung@...>
Sent: Tuesday, January 21, 2020 7:37 PM
To: [email protected] <[email protected]>
Subject: Re: [XRF] cyrtolite Little Patsy XRF

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Ok, here are the final files.? I'll start the other South Platte cyrtolite now.

Charles

On Tue, Jan 21, 2020 at 7:17 PM Dude <dfemer@...> wrote:

Lookin’ good

Dud

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From: [email protected] [mailto:[email protected]] On Behalf Of Charles David Young
Sent: Tuesday, January 21, 2020 3:49 PM
To: [email protected]
Subject: Re: [XRF] cyrtolite Little Patsy XRF

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I am still running this scan but the element list is now:

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Fe Hf Y Zr

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I have also included an intermediate .mca file.

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BTW my gamma scans show this is a combination of U238 and Th232 decay chains.? I have attached scans of various cyrtolites (including this one) whose Pb212 peaks at 238keV are relatively large, indicating the presence of Th232.? The Pb214 peak at 295keV indicates U238.

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Charles

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On Tue, Jan 21, 2020 at 12:36 PM Charles David Young <charlesdavidyoung@...> wrote:

And this is the rock.

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On Tue, Jan 21, 2020 at 12:36 PM Charles David Young <charlesdavidyoung@...> wrote:

It is still early but here are some of the strongest peaks:

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Fe Y Zr

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I'll send the .mca later when I have some decent counts.

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Charles