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Gold/Mining/Energy : Medinah Mining Inc. (MDHM) -- Ignore unavailable to you. Want to Upgrade?

To: Mike Gold who wrote (5959)	9/5/1998 6:31:00 AM
From: E. Charters	Respond to of 25548

Hypothermal is high temperature. 300 to 500 degree centigrade or up to 932 degrees farenheit. Gold, pyrite, arsenopyrite, and molybdenite with quartz form in veins at this temperature. High grade Canadian Gold mines are commonly of this type. The nevada-arizona thrust fault had high temperature minerals and was thought to be important for gold exporation since the 1930's for this reason. Mesothermal: 200-300 degrees cent. Gold and quartz do form with other minerals such as rhodocrosite, ankerite, siderite and other carbonates. Some mines of the Porcupine camp may be of this type although some definitely fall in the Hypothermal category. What if you have tourmaline and ankerite and fuchsite? Mesothermal or Hypothermal? High silver was usually a sign of mesothermal type which are considered shallow (less than 1500 feet depth). They can mix in one region. Epithermal deposits are low temp 50 to 200 degrees cent. Gold silver and mercury form at these temps. Accessories are antimony and calcite and some iron sulfides. These are the Lindgren temperature classifications. It was believed at the time that the most important ore was formed under the hot ascending solutions of the hypothermal kind. This is not now universally believed. Large orebodies of all three types may form. EC<:-}

To: Mike Gold who wrote (5959)	9/5/1998 6:36:00 AM
From: E. Charters	Respond to of 25548

The NWT has many mines that operate quite well in the permafrost. You can dry drill with dust collectors. After you are down 1000 feet the ground is not longer frozen even in deep permafrost. In Yellowknife it is not permafrost as they are on a lakeshore. Gold mining is about the same cost the world round. Right now it is cheap in Canada due to the weak dollar. yukonweb.com EC<:-}

To: Mike Gold who wrote (5959)	9/5/1998 6:54:00 AM
From: E. Charters	Read Replies (1) \| Respond to of 25548

Mantos are restricted to the breccia zones created by the intrusive and are small and shallow usually. They can however repeat in clusters. They form pipe like deposits that lend themselves to open pit mining. If you have 10 one million ton mantos at .15 gold you would have a fair mine. Bear in mind that the largest gold mine in South America is the Yanacocha in Peru. It is a cluster of 9 mantos and it has a reserve of 9 million ounces. That means that it is possible to find large orebodies but so far they have not found many. Gitennes has a highly mineable open pit heap leach situation of perhaps 2 million ounces or more and their stock is 47 cents. Go figure what an orebody is worth. One rule in geology is never make a rule until the orebody is drilled off. It is better to be famous in hindsight than infamous in foresight. mailto:echarter@vianet.on.ca