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Offline Azjake
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« Reply #10 on: March 17, 2010, 06:08:50 pm »
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Are the Geiger counters you use sensitive enough to detect with the variance of background radiation?  I've been around some counters and the needles are always bouncing with just the background radiation, even indoors.  I would guess in an area that is rich in radioactive materials that the whole area has a higher background count.   I guess this may depend on if the vein(?) of material is localized or spread out (like gold flakes through washes and streams).  Again these are my assumptions I do know some about working around materials but none about mining, just kind of comparing to gold, and am probably way off.

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Offline BitburgAggie_7377
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« Reply #11 on: March 17, 2010, 06:36:25 pm »
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Having used a geiger counter a few times, even with high background radiation you KNOW when you find the target....just like you know when you find the target with your metal detector.   

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Offline Azjake
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« Reply #12 on: March 17, 2010, 07:01:59 pm »
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Interesting BA, with the strict controls working with it, the stuff you find must be "hot".

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Offline BitburgAggie_7377
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« Reply #13 on: March 17, 2010, 07:08:32 pm »
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Well, let's put it this way, cancer rates among uranium miners and among Navajos living near areas where uranium was mined are higher than the norm.   (By the way, it's been years since I used a counter, so I'm not "the" expert.....but yeah you can tell)

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Offline DougNistlerTopic starter
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« Reply #14 on: March 18, 2010, 05:50:11 am »
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All - Bitburg is right.  Even if the backgournd raditation is high a good setup will most definitley let you know when you have found a hot rock.  As an example, I use a probe that I built, along with my Ludlum 3, and even though the background count is on the order of 3000 counts per minute, it rises to about 5000 cpm when I place it directly on top of our granite counter tops, rises to 10,000 cpm when 2 feet away from a piece of uraninite mineral I have.  As far as the radiation hazard is concerned, there is not much if handled properly; stored in airtight containers - limits the radon hazard, wash hands after handling and don't carry a piece around in your back pocket and you will be alright.  Distance is also a factor, just like light, radiation from minerals follows the inverse square law, double the distance and the radiation level decreases by a factor of four.
I'll post any results after my upcoming trip to Colorado. 

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« Reply #15 on: March 18, 2010, 12:03:47 pm »
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Since the beggining  of the atomic age, geologists from the USGS and state agencies have mapped out all the uranium surface deposits and the chance of finding a new deposit are practically  nil. That's not to say you can't find some claims that have uranium minerals on them but they will be in an area already previously mapped. Your state geologist or USGS has loads of information on uranium deposits but you have to pay for it.

Uranium mining in this country is no longer done  by underground or strip mining. These days they pump superhot water into known underground uranium bearing sandstone formations to dissolve the uranium salts, pump it out, then process it.

Another piece of equipment you need is a battery operated, portable long wave- short wave UV light for detecting fluorescent minerals at night. A number of uranium minerals fluoresce, usually brilliant yellow,yellowish green or green. There a quite a few mineral collectors who specialize in fluorescents and are looking for new additions to their collections.

Steve


By the way- I have a soft cover book "Uranium Resources of Northwestern New Mexico" 166 pages with two maps for sale. Published in 1969 but still has a lot of valuable information in it. $20.00 PP.

PM me if anyone is interested.



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