SAN MANUEL MINE
Archived

Au
1,306.28
USD/oz
-0.02
red
Data as of Jul 23, 2014 01:40AM UTC
Cu
3.17
USD/lb
-0.53
red
Data as of Jul 21, 2014 12:00AM UTC


Key Facts
Status: Unknown
Type of Work: Open-Pit/Underground
Location: Arizona, United States
                 72 km NE of Tucson

Commodities: Gold, Copper
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Latest Information
April 30, 2001
San Manuel is an underground block caving operation on care and maintenance status (since Jun/99) with an in-situ and residual heap leach of oxide ore in active production. The deposit consists of the San Manuel and Kalamazoo orebodies which are faulted segments of a once single, cylindrical shell of disseminated Cu mineralization around a core of barren rock. This shell is from 100 to 1,000 ft thick, 7,700 ft long and 2,500 to 5,000 ft in diameter. The San Manuel orebody contains both underground sulfide ore and open pit oxide ore. The Kalamazoo orebody contains underground reserves and is accessed via the San Manuel workings. The sulfide ore consists essentially of disseminated chalcopyrite in quartz monzonite and monzonite porphyry. Some chalcocite enrichment is present in minor amounts. Much of the upper part of the orebody has been oxidized in varying degrees, mainly to chrysocolla. Mining is conducted using both underground block caving and open pit methods. The ore from the underground operations is processed through a concentrator and smelted onsite. The ore from the open pit operations is placed on leach pads, sprayed with water and sulfuric acid, and the pregnant solution is pumped to the SX-EW plant onsite. There is also in-situ leaching which occurs in areas adjacent to depleted portions of the underground mine. The sulfuric acid leach solution is injected to a depth of 600 to 1,200 ft and then pumped to the SX-EW plant.
April 30, 2001
San Manuel is an underground block caving operation on care and maintenance status (since Jun/99) with an in-situ and residual heap leach of oxide ore in active production. The deposit consists of the San Manuel and Kalamazoo orebodies which are faulted segments of a once single, cylindrical shell of disseminated Cu mineralization around a core of barren rock. This shell is from 100 to 1,000 ft thick, 7,700 ft long and 2,500 to 5,000 ft in diameter. The San Manuel orebody contains both underground sulfide ore and open pit oxide ore. The Kalamazoo orebody contains underground reserves and is accessed via the San Manuel workings. The sulfide ore consists essentially of disseminated chalcopyrite in quartz monzonite and monzonite porphyry. Some chalcocite enrichment is present in minor amounts. Much of the upper part of the orebody has been oxidized in varying degrees, mainly to chrysocolla. Mining is conducted using both underground block caving and open pit methods. The ore from the underground operations is processed through a concentrator and smelted onsite. The ore from the open pit operations is placed on leach pads, sprayed with water and sulfuric acid, and the pregnant solution is pumped to the SX-EW plant onsite. There is also in-situ leaching which occurs in areas adjacent to depleted portions of the underground mine. The sulfuric acid leach solution is injected to a depth of 600 to 1,200 ft and then pumped to the SX-EW plant.
March 31, 2000
No significant work was completed on the project in the first quarter 2000.

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