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#1

Wishfull
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From: Yorke Peninsla S.A., SA
Joined: 27 April 2016
Posts: 2,856
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27 August 2016 12:09 am

Someone plz explain. When these guys on "Gold Rush" put all the rubble over their machines and spray it with high pressure jets of water. Would they not be missing rocks with embedded gold ? Shouldn't they be collecting those rocks and then putting them through a stamper and then running it over matting ? I'm not really up there with this type of prospecting so plz enlighten me.

Edit spelling

Last edited by Wishfull (27 August 2016 12:11 am)


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#2

Jaros
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From: S.E.Qld., QLD
Joined: 11 August 2013
Posts: 10,695
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27 August 2016 04:20 am

You would hope so but there is no proof of that in the series is there? yikes


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4 users like this post: Wishfull, RM Outback, HoudiniHarry, dinger

#3

Norvic
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Joined: 15 February 2015
Posts: 244
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27 August 2016 05:12 am

Of the few big machinery alluvial miners I know, none of them do so, but they do know specimens are left in their tailings. Mostly it is not viable for them to process such, ah ha but for us it is different. Those tailings are well worth detecting, but you`ve gotta contend with both the metal from the old timers and that from todays miners eg.bloody metal caps off grease cartridges etc etc. Tis there for sure.


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#4

Pavel Russia Sibirea
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Joined: 27 April 2019
Posts: 33
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27 April 2019 09:26 pm

Hi there!
In Russia we have too much gold remains in the tailings, especially many remains of large nuggets. We then collect them using metal detectors.

1 user likes this post: RM Outback

#5

Ramjet
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From: Maitland, NSW
Joined: 19 February 2013
Posts: 15,357
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28 April 2019 08:58 am

Alluvial gold. It's been washed down from the source by years of floods.


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#6

Eski
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From: G'BOROUGH, VIC
Joined: 10 May 2015
Posts: 217
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28 April 2019 03:15 pm

Typically crusher is run when there is a high % of rocks containing gold. IE in a reef claim/mine. In an alluvial mine, that rock containing gold is blended with tones of Country rock (granite,sandstone, Mudstone,whatever) as such the gold obtained from the effort of crushing x amount of rock is not worth it.

#7

goldierocks
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Joined: 10 January 2015
Posts: 1,552
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28 April 2019 03:33 pm

Eski wrote:

Typically crusher is run when there is a high % of rocks containing gold. IE in a reef claim/mine. In an alluvial mine, that rock containing gold is blended with tones of Country rock (granite,sandstone, Mudstone,whatever) as such the gold obtained from the effort of crushing x amount of rock is not worth it.

Interestingly that assumption does not always work. I have sampled dumps where all "unmineralised" boulders, containing no quartz, average 3 to 40 g/t gold. It appears that they simply did not check in some cases (also, most alluvial mines lacked a crusher on site).


Robert Benchley...
I have kleptomania, but when it gets bad, I take something for it.

1 user likes this post: RM Outback

#8

Eski
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From: G'BOROUGH, VIC
Joined: 10 May 2015
Posts: 217
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28 April 2019 06:51 pm

Agree with that goldie. My Assumption is that most run on assumption....... but realistically what were the dumps you were sampling. were they consistent results/from a modern plant? were the rocks washed properly?

I guess each particular case is different and each particular mine has to make up it's own mind (based on testing/research or Not)

#9

Gem in I
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Joined: 11 June 2016
Posts: 376
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01 May 2019 04:30 pm

a mine in fnq smoothes out tailings pile and a quick run over with detector satisfies peace of mind for them.


Patience is a learnt thing. Learnt it, sold it. Bought DETERMINATION.
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1 user likes this post: Diggerman60

#10

Tathradj
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From: Tathra, NSW
Joined: 17 February 2014
Posts: 8,375
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01 May 2019 10:16 pm

A lot of what they are processing are tailings from the old dredges that
were not very efficient.
Tony showed that in last years episodes where they modified the sluices.

Yes, They do come across some virgin ground where the dredges missed
and the results are spectacular.


A couple of HiBankers inc. accessories, , QED, 4500, SDC2300, Gt1600,
Aldi, A Prado 4x4, A'Van Cruiseliner and a heck of a lot of determination.
Most importantly, A lot of Good Honest Friends. Maybe one day Lucky.

1 user likes this post: RM Outback

#11

Goldtalk Leonora
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Joined: 15 July 2015
Posts: 66
Member
04 May 2019 03:20 pm

crushing circuits cost money...it all comes down to a question of economics.
Good grade control in alluvial operations is a very difficult thing to achieve....most of the time it's tonnage=return


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