Mckee, Edwin H. <br/><br/>
Timing of igneous activity, alteration, and mineralization at the Orcopampa Ag-Au district, southern Peru 

 - Reston, VA  U.S. Geological Survey  1994 
 - p. 65-66  ilus. 
 - U.S. Geological Survey Circular  n.1103-A .
<br/><br/><label>Subjects--Topical Terms: </label><br/>ALTERACIÓN HIDROTERMAL<br/>BRECHAS<br/>CONTROL ESTRUCTURAL<br/>GENESIS-YACIMIENTO<br/>GEOCRONOLOGIA<br/>ROCAS VOLCANICAS<br/>YACIMIENTOS EPITERMALES
<br/><br/><label>Subjects--Geographic Terms: </label><br/>AREQUIPA<br/>ORCOPAMPA<br/>PERU<br/>S^ORO<br/>S^PLATA