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10/07/18
06:54
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Originally posted by freeheel
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Really liked that news release today.
The reference to "stockwork" veining I thought was very intriguing. In the corresponding Metal tiger release, their CEO highlighted it, and made reference to it being “a style previously unseen by the JV drilling.”
If you go with a generic definition for "stockwork" such as that of AGI Glossary of Geology (Jackson and Bates, 1968) a "stockwork is a mineral deposit consisting of a three-dimensional network of planar to irregular veinlets, closely enough spaced that the whole mass can be mined." - then on a general level that sounds like a general description of the T3 deposit. But they’ve previously characterised the T3 deposit as “sheeted-veins” or “stacked veins” associated with the thrust-fault, on the northern side of the dome. So Metal Tiger highlighting that it is different style is significant imo: perhaps we’re seeing a new type of deposit here – the sheeted vein deposits on the northern sides of the domes a la T3, and this new type of stockwork deposit on the southern sides of the domes?
I’ve seen the term “stockwork” used a lot to describe the veining/mineralisation in copper porphyry systems where the fractures form above an intrusion, but I think the principle is the same here, where the sediments have presumably been extensively fractured due to the stresses involved in folding and then the hydrothermal fluids have filled the fractures creating the mineralisation. Given the stresses would have been regional in scale, it could point to an extensive strike-length. Have to wait and see whether that is the case. The fact they’re referring to “stockwork” to me suggests to me that it’s a pretty dense network of veins, which bodes well for grade, and the fact they’re drilling to the north and south of it (whereas they haven’t with the first hole in A4) suggests they like the look of it.
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Some great posts today, very interesting and informative.
Here is the comment by the Metal Tiger's CEO.
Michael McNeilly Chief Executive Officer of Metal Tiger commented :
We are delighted to report that the latest drill hole testing the core of the A4 Dome has intersected what looks to be significant copper sulphide mineralisation. The onsite geologists are particularly excited by the stockwork morphology of the mineralisation which is a style previously unseen by the JV drilling. This has further implications in that the A4 Dome appears to be an intact dome, so any vein hosted mineralisation deposited within the dome should still be there. Everyone is looking forward to receiving the assay results.
From the Ann. " Chalcopyrite is the most dominant sulphide in the veins
Significanse of Chalcopyrite
Chalcopyrite is the most important copper ore . Chalcopyrite ore occurs in a variety of ore types, from huge masses as at Timmins, Ontario , to irregular veins and disseminations associated with granitic to dioritic intrusives as in the porphyry copper deposits of Broken Hill , the American cordillera and the Andes . The largest deposit of nearly pure chalcopyrite ever discovered in Canada was at the southern end of the Temagami Greenstone Belt where Copperfields Mine extracted the high-grade copper.[9]
Chalcopyrite is present in the supergiant Olympic Dam Cu-Au-U deposit in South Australia .
Chalcopyrite may also be found in coal seams associated with pyrite nodules, and as disseminations in carbonate sedimentary rocks.
Wonder if there will be a trading halt before the assay results are released