found this
posted on
Mar 30, 2011 04:00AM
Keep in mind, the opinions on this site are for the most part speculation and are not necessarily the opinions of the company WITHOUT PREJUDICE
After almost 4 hours of digging trying to find info on grades out of that San Juan Chorunga mining complex to the south of us, BINGO. Here is the head grade (the grade of the ore as delivered to the metallurgical plant.)
Head grade-(CERQUIME): 1.90 oz Au / TC, 65.16 g Au / TM
Demex): 2.24 oz Au / TC, 77.0 g Au /
Average: 2.07 oz Au / TC, 70.98 g Au / TM
With a low recovery rate of around 70%, they would still get about 1.5 ozs per ton gold. With todays techniques, I beleive an experienced miner could probably get recovery rates in the order of at least 85%.
You can find this on pg 6 of this technical report, here is the link:
http://translate.google.com/translate?hl=en&sl=es&u=http://www.bvcooperacion.pe/biblioteca/bitstream/123456789/4580/1/BVCI0004235.pdf&ei=VdaSTYHSIY6tgQejrqwZ&sa=X&oi=translate&ct=result&resnum=5&ved=0CDwQ7gEwBA&prev=/search%3Fq%3Djaqui%2Bdeposit%2BSanta%2BFilomena,peru%26hl%3Den%26rlz%3D1T4ADSA_enCA335CA336%26prmd%3Divns
The artisinal miners there target the high grade veins. This is for the Santa Filomena mine there only, I understand that on that small plateau there is another small artisinal mining company, that target 2 veins, the Clyde and San Luis veins. I have no info for those yet.
This is small scale shaft mining at Santa Filomena and it now appears to me that they were getting an average grade of around 2 ozs/p/t. That is extremely high grade vein material and its good to know that its part of our trend. It appears that they do no soil sampling and there could be disseminated gold grades there also above 1 g/t on the surface. I did notice on some of my searching tonight that some tailings from this area was tested for mercury content, but in that result, (i think, if i remember correctly) gold content still ranged as high as 6-8 g/t. This was the discarded material. A miner could very profitably process what they are throwing away.