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 />
• 50 x 20 km area<br />
• District-‐wide zoning<br />
– Au in north<br />
– Pb-‐Zn in center<br />
– Cu-‐Ag in south<br />
• Underlain by:<br />
General Seong<br />
– Proterozoic Belt Group<br />
– Cretaceous igneous intrusions<br />
– Ter>ary and Quaternary unconsolidated units<br />
Belt Group<br />
• Quartzites, argillites and calcareous rocks<br />
up to 6km thick<br />
• Shallow water origin<br />
– Mud cracks, ripples, stromatolites<br />
• Folded, faulted and minor metamorphism<br />
in Proterozoic and during Laramide<br />
– Monzonite stocks and lamprophyre dikes and<br />
sills were intruded aver Mesozoic deforma>on<br />
– Minor diabase sills appear to be Precambrian<br />
18
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