Cordilleran Vein Type Deposits Examples
Cordilleran Vein Type Deposits Examples
Cordilleran Vein Type Deposits Examples
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<strong>Vein</strong>s 11/3/10<br />
Timing, temperature, mineralogy,<br />
zona>on (cont.)<br />
• Chalcopyrite abundant in center, Sb-‐As-‐Bi<br />
sulfosalts take over peripherally<br />
• 4-‐40% NaCl, varied erra>cally, minor boil<br />
• Average ore grade:<br />
– 2% Pb 3% Zn<br />
– 0.3% Cu 10 oz/ton (310 ppm) Ag<br />
• <strong>Vein</strong>s up to 1 meter wide<br />
– Important small adjacent parallel fractures<br />
9
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