Need help about ppm and gr/ton.

[nomorebeer]

Hello guys, first i'm living Europe. I did some research about the known placer gold places around my city, i don't find good documents but i found some document says there is a place like;

3,027 gr/ton Au,
19.846 tons observable/possible
17.407 tons probable reserve.

I just do some research about the "ppm" and gr/ton i guess its the same vaule. Then this place's possible reserve is 3ppm. So is that 3ppm is good amount vaule or not? I mean i'm reading this forum and watching videos etc... There is known rivers you generally working on there like yuba
yukon and them forks... So i just wanna compare like what is the ppm of the rivers you are genereally hunting. Or what is the average ppm is good for checking the place.

Best Regards...


Edit: I find this very usefull Concertration Conversion Calculator;

http://www.cleavebooks.co.uk/scol/ccconc.htm

 

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[GoldpannerDave]

Hello guys, first i'm living Europe. I did some research about the known placer gold places around my city, i don't find good documents but i found some document says there is a place like;

3.027 gr/ton Au,
19.846 tons observable/possible
17.407 tons probable reserve.

I just do some research about the "ppm" and gr/ton i guess its the same vaule. Then this place's possible reserve is 3ppm. So is that 3ppm is good amount vaule or not? I mean i'm reading this forum and watching videos etc... There is known rivers you generally working on there like yuba
yukon and them forks... So i just wanna compare like what is the ppm of the rivers you are genereally hunting. Or what is the average ppm is good for checking the place.

Best Regards...

Hi, ppm is parts per million and that is mg per kg. So the mg of gold per kg of ore / gravel would get you ppm. The official abbreviation for grams is g. Some use gr, but it is wrong. The abbreviation gr is grain, or 64.79891 mg. I am guessing you know that Europe uses commas where we use a decimal place, so your 3 point 027 is not three thousand and twenty seven, but slight over 3 grains. I suspect they meant grams, but maybe not.

Anyway, miners used to use oz (troy oz) per ton (2000 pounds). Today, with less rich areas being worked, it could be grams per ton. That is close to ppm if is grams and not grains. Generally no one uses ppm for gold except academic researchers. Well, maybe in Europe, but not here in the US.

So, if it is 3.027 ppm that is not great, but would be mined today with cyanide if that is for ore--if the ore body were big enough to justify it. It is roughly 0.0882 oz/ton, since that is 3 mg per kg or about 0.003 grams per kg or 0.003027 grams gold per 1000 grams gravel/ore. (Using the conversions of 31.1 grams gold per troy oz and 453.6 grams per pound and 2000 pounds per ton).

With less than 20 tons total, you have about 1.77 oz gold possible. Even with another 17.407 tons of probable reserve, you have less than 4 oz of gold there; less than $5000 dollars value.

OTOH, if it is 3.027 grams per ton, that is about 0.1 oz per ton (0.0973 oz per ton) or about 1.9 oz possible ounces of gold. About the same (unless it truly was grains per ton).

Others, please check my math; I can be wrong. Ask my wife!

 

[johnnysau]

Not sure what your asking for: Im no expert either.

Todays price $1224, @ 80% purity.

But if there were an average 35 pound bucket full of material it would have $1.54 , 1 dollar and 54 cent in it.
But if there were an average 20 pound bucket full of material it would have $0.88 , 0 dollar and 88 cent in it.

from a home made calculator. johnnysau

 

[nomorebeer]

Hi, ppm is parts per million and that is mg per kg. So the mg of gold per kg of ore / gravel would get you ppm. The official abbreviation for grams is g. Some use gr, but it is wrong. The abbreviation gr is grain, or 64.79891 mg. I am guessing you know that Europe uses commas where we use a decimal place, so your 3 point 027 is not three thousand and twenty seven, but slight over 3 grains. I suspect they meant grams, but maybe not.

Anyway, miners used to use oz (troy oz) per ton (2000 pounds). Today, with less rich areas being worked, it could be grams per ton. That is close to ppm if is grams and not grains. Generally no one uses ppm for gold except academic researchers. Well, maybe in Europe, but not here in the US.

So, if it is 3.027 ppm that is not great, but would be mined today with cyanide if that is for ore--if the ore body were big enough to justify it. It is roughly 0.0882 oz/ton, since that is 3 mg per kg or about 0.003 grams per kg or 0.003027 grams gold per 1000 grams gravel/ore. (Using the conversions of 31.1 grams gold per troy oz and 453.6 grams per pound and 2000 pounds per ton).

With less than 20 tons total, you have about 1.77 oz gold possible. Even with another 17.407 tons of probable reserve, you have less than 4 oz of gold there; less than $5000 dollars value.

OTOH, if it is 3.027 grams per ton, that is about 0.1 oz per ton (0.0973 oz per ton) or about 1.9 oz possible ounces of gold. About the same (unless it truly was grains per ton).

Others, please check my math; I can be wrong. Ask my wife!

GoldpannerDave, thank you so much this cool explanation... I totaly understand what you saying. But the 3ppm is correct. In my country, my language we are using "gr" for gram(1/1000kg). And you right about there is some incorret use for "." and ",". It should 3,027. So you saying 0.0882 oz/ton is not a great amount. So what is the good amount ppm for mines around the world or your area? I googled some but can not find anything yet. I mean can you give me some examples from mines amount of ppms. And the unit conversion is killing me btw.

Ps, sorry for my poor English.

Best Regards..

 

[GoldpannerDave]

GoldpannerDave, thank you so much this cool explanation... I totaly understand what you saying. But the 3ppm is correct. In my country, my language we are using "gr" for gram(1/1000kg). So you saying 0.0882 oz/ton is not a great amount. So what is the good amount ppm for mines around the world or your area? I googled some but can not find anything yet. I mean can you give me some examples from mines amount of ppms. And the unit conversion is killing me btw.
Ps, sorry for my poor English.

Best Regards..

Thanks for your kind words. Your English is fine; much better than my German--or my French or Spanish, both of which are even worse. I do understand the difficulty of trying to communicate in another language; I lived in Germany for 7 years. You are doing just great.

So, grams per ton is in tons (US tons not metric tonnes). That further complicates it. If it were grams per tonne, then it would be grams per 1000 kg and it would be ppm. In grams per ton, it is only approximately the same as ppm. To convert ppm to oz gold per ton, the easy way is to divide by 34. That will give you decent conversion, though not exact.

Hope that helps with conversions. Cripple Creek, near me, had gold in the mines running much richer than today, but today the Cripple Creek and Victor Gold Mine is working ore about 0.2 oz per ton, though there are still pockets of higher values. I am pretty sure the placer areas we work are not very rich today either--at least not by the standards of 150 years ago.

 

[KevinInColorado]

Wait, I'm confused... Is it 3 grams per ton or three thousand grams per ton? LOL
I'd say that's pretty low gold for placer BUT go find the hot spots in the waterway and I bet you can still find enough gold to make you smile!

PS nice dimensional analysis work Dave! So glad you are here to share your expertise instead of me trying to dig up my skills from freshman chem!

 

[nomorebeer]

KevinInColorado, thank you for reply. Yes there was some missspell for dots, commas .

 

[KevinInColorado]

I think I need to correct my math. 3 grams is fairly good placer paydirt. Not greatest ever but I've happily dug dirt with much less gold than that myself. That would be 3 grams in 40 food service buckets (5 U.S. gallons each, partially full). I've been lots of popular places that only produce 1/3 or 1/10 as much. STOP TYPING AND GO DIG!! :-D

 

[nomorebeer]

Wow nice to hear that, i get excited! See you la... (*he's gone).

 

[GoldpannerDave]

Wait, I'm confused... Is it 3 grams per ton or three thousand grams per ton? LOL
I'd say that's pretty low gold for placer BUT go find the hot spots in the waterway and I bet you can still find enough gold to make you smile!

PS nice dimensional analysis work Dave! So glad you are here to share your expertise instead of me trying to dig up my skills from freshman chem!

Actually, after a few moments reflection, you would know. The 3000 g per ton ore would be likely be gone already, because it would be over 96 oz/ton; well over $2,000,000 worth of gold, even for only 20 tons of ore. And there is another 17 plus tons of probable reserves--that is nearly another $2 million if the reserves are actually there.

So like I tell my cadets, think about your answer.

Yeah, yeah, I know, you were being funny, but it is a good teaching point--to think about your answer. Man, I do wish we could locate a 3000 g per ton area!! I know--Lowe's Fraction!! He took out 2400 oz in 8 hours.

 

[nomorebeer]

Btw, i found this awesome online calculator;

Concentration Conversion Calculator

So, 3 gram per ton.. $40 x 3 = $120..
for 17k tons reserve 120 x 17000 = 2$MIL total reserv for 100km² ( the document says the research done with 10x10km area)

There is 2 creeks flows on this area... So i'm gonna try this area. Thank you so much all you guys

 

[Hoser John]

The most important fact to realize is that these figures are ONLY as good as the samples submitted for analysis. Many,if not most,are wrongly higraded-concentrated from say 100 yards to a cubic foot and then a analysis is done. Results are worthless becase they do not represent a true sample from the ground nonconcentrated. Also a highraded gold seam means nothing unless the associated rocks are included as a true sample for accuracy.So the figures can only be trusted when the process to acquire is ABSOLUTELY known-John

 

[GoldpannerDave]

The most important fact to realize is that these figures are ONLY as good as the samples submitted for analysis. Many,if not most,are wrongly higraded-concentrated from say 100 yards to a cubic foot and then a analysis is done. Results are worthless because they do not represent a true sample from the ground nonconcentrated. Also a highraded gold seam means nothing unless the associated rocks are included as a true sample for accuracy.So the figures can only be trusted when the process to acquire is ABSOLUTELY known-John

Excellent point, Hoser John. This is true for any sampling process; the results are only as good as the data. Bad sampling, bad results. All the calculations in the world, done correctly on bad data give bad results.

GIGO.