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Cleaning mixed sulfides.
  
  Index -> Conserving, Preparing and Cleaning Minerals
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vic rzonca




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PostPosted: May 15, 2018 09:09    Post subject: Cleaning mixed sulfides.  

My work took me to a small, former, mining town near the divide and Loveland pass, in Colorado. In the very interesting mining and industrial debris, from the 1800's, spread around the site, I found this 6" diameter drill core, penetrated by a 1 1/2" drill hole. In casual conversation, describing my find, with my friend Robert Cook, Geosciences Professor Emeritus at Auburn University, he, of course, had an explanation of what I had found. He proceeded to describe the ability of mud loggers, on the smaller hole, to locate the vein and the core drillers to triangulate to prove the vein. My find was that proof. Anyway, my question is this, is there a way I can clean, read, shine up the mixed sulfides - Au bearing pyrite and acanthite? I intend to weld up a display for the George Rowe Museum in Silver Plume, CO., relating Cooks story. Again, can I, should I clean the ore vein? Just for optics. Thank you.


core1.jpg
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A mock up of what I have in mind for the museum.
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core1.jpg



core.jpg
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Looking for pay ground.
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core.jpg


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Joseph D'Oliveira




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PostPosted: May 15, 2018 13:20    Post subject: Re: Cleaning mixed sulfides.  

Hi Vic,
I use VIM cream cleaner and a tooth brush. It has a very fine abrasive which is good for removing light oxidation and it puts a nice shine on many of the sulphide/arsenide minerals.

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Peter Lemkin




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PostPosted: May 16, 2018 12:01    Post subject: Re: Cleaning mixed sulfides.  

Not in answer to your question, but a comment to your find....how the hell did they thread that needle by bisecting one core with another? Unless they were very close to it, that is quite an amazing feat, as far as I know.... Now, with lasers and more precise positioning something like that would still be difficult, but this was long ago, and my hat is off to the people who did that!...... I'm no mining engineer, but can imagine the work and precision involved.
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vic rzonca




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PostPosted: May 16, 2018 14:06    Post subject: Re: Cleaning mixed sulfides.  

I agree, Peter, the skill involved was impressive. Cook said these guys took pride in being able to do this type of thing. To this day they have drill competitions. Remember, back in the late 1800's and early 1900's this was a gold-silver rush town at 9500' and outside the brothel (which I'm working on) and the saloon (which is across the street) what else did they have to do but sharpen their tools and skills?


silverplumeCO-ca1900-55555 copy.jpg
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The 2 story building center shot, below the white tailings pile is the brothel, where I found the core, 150 years later.
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silverplumeCO-ca1900-55555 copy.jpg



silverplumeCO-mainst-2343245 copy.jpg
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The rush was on. Main Street, Silver Plume. The brothel is second storefront in from the right, just in case you're looking for something to do.
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silverplumeCO-mainst-2343245 copy.jpg


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Peter Lemkin




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PostPosted: May 16, 2018 14:19    Post subject: Re: Cleaning mixed sulfides.  

I've been there many a time collecting on the old dumps! I like the photos!
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