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To: Claude Cormier who wrote (111328)5/3/2013 10:58:57 PM
From: Rocket Red  Read Replies (2) | Respond to of 233810
 
Thanks,i'm watching it go without me but I had a chance at open after they released the news i passed
Yes the hole is good not fantastic as the grade is still lower side in my opinion.

The way Mr.market has been and many other mega deposits the market has now shut out

I wish them well and hope they hit a big hole like 1% plus over mega meters if they do i'll be in but as it stands right now i'll watch



To: Claude Cormier who wrote (111328)5/4/2013 12:56:24 AM
From: E. Charters  Read Replies (1) | Respond to of 233810
 
I think the average VMS deposit in Canada and worldwide averages about 500,000 tonnes.

Windy Craggy was a case of a Kuroko type which is close to VMS in character. It was quite high grade for its size, 400 million tonnes of about 1% copper.

The average epithermal deposit surprisingly is about 1 million tonnes. The reason for the promo on epis is that they are sometimes, rarely quite large.

The hyperthermal gold deposits of the Archean, formed when the earth was quite hot and quite close to porphryries albeit underwater about 5000 feet, are on the average quite large. Some go to 100 million tonnes, (McIntyre-Hollinger) and many went to 6 to 25 million tonnes in Kirkland Lake and Timmins.

IOCG deposits run to large often. The head of steam on fault and intrusion IOCG's which vary widely in actual mineralogy seems to have run out lately.

Porphyries so called, or disseminated deposits related to intermediate to felsic intrusions do tend to large. There are literally hundred around the world of 100 million tonnes and larger which are not being exploited for one reason or another. BC probably has many more to find. St. Elias-Wrangell to the Stikine is one of the great copper ranges of the world. Cominco liked it but could not see the economics when they were exploring in the 70's and 80's.The orebodies are associated with multiple intrusions and dikes of diorite to quartz monzonite composition with porphyritic textures.
  • Breccia zones with angular or locally rounded fragments are commonly associated with the intrusives. The sulfide mineralization typically occurs between or within fragments.
  • The deposits typically have an outer epidote - chlorite mineral alteration zone.
  • A quartz - sericite alteration zone typically occurs closer to the center and may overprint.
  • A central potassic zone of secondary biotite and orthoclase alteration is commonly associated with most of the ore.
  • Fractures are often filled or coated by sulfides, or by quartz veins with sulfides. Closely spaced fractures of several orientations are usually associated with the highest grade ore.
  • The upper portions of porphyry copper deposits may be subjected to supergene enrichment. This involves the metals in the upper portion being dissolved and carried down to below the water table, where they precipitate

The reasons most hydrothermal and vein mineral deposits are small is because of the relative permissiveness of systems of structure. Erosion has taken the earth down to its tightest slowest to erode level, leaving most surface expressions as meagre compared to gone by levels. A lot of times when you drill it gets better, which seems strange to many but makes perfect sense. In Canada the greatest exposure of rock cause by water and freeze thaw erosion and glacial movement, the Shield is deeper than most. Strangely the volcanic rocks are exposed throughout this Shield. They were for much of their life under seas, and formed island chains like Hawaii. Seawater formed most of the deposits by leaching back down and up, driven by hot slow cooling felsic intrusives and extrusives which now and then exploded hurling rock and ash up to a 100 miles. Very nearby large volcanic ejected boulders, the size of houses, are found orebodies often. Vast plains of ash are seen in the rock today spread over greater areas than most rock formations of their kind worldwide. The widest spread of explosive volcanic rocks is in Sudbury Ontario. Later continental movement thrust mountains 6 miles straight up north of Logan's line and put the volcanics, which in fact are a form of sediment into tight folds. This folding made the rock ore productive rock descend to great depths. For this reason Canadian gold deposits "go down" most of the time to deeper than they can actually be mined. We can guess an average of 15,000 feet. The next time an investor asks you if a Canadian mine "goes down" you can shake your head at the anti abyss-mal ignorance of the pseudo geologist. Like fast women and cheap whiskey in a house of red lights, they all go down.

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