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Explore the geological characteristics of Harrison Mountain at the Henderson mine site. Preliminary lab layout, drill hole details, rock analysis, and potential for rockbursting during mining operations.
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Operations Description Climax Molybdenum Company Henderson Operations
Mine Site with Red and Harrison Mountains Harrison Mountain Red Mountain - Mine
Geology • Classic Climax-type porphyry molybdenum deposit • Host rock is granite/aplite porphyry • 474,000 feet of core drilling • Limited accessory mineralization
Drill Hole into Harrison Mountain • The hole is 2,500 feet in length • The hole had an inclination of -26 degrees with the top at the 7,500 feet and the bottom at 6,300 feet. • The hole was drilled at HQ-3 (2.4 inches in dia.) for 1,397 feet and NQ-3 (1.8 inches in dia.) for 1,102 feet. • Hole deviation was less than 200 feet • Geological logging is complete
Drill Hole into Harrison Mountain (cont.) • The rock is a rhyolite or aplite porphry • The rock is very hard with a high percentage of quartz. • The rock is expected to have a high compressive strength (this will be tested) • The RQD is quite high, 70 – 100. • There is no evidence of mineralization
Drill Hole into Harrison Mountain (cont.) • There were only a few small fractured zones, not near the UNO area, and no fault zones • There is very little water, only about 1.5 gpm. • Due to the hardness and strength, there is some potential for rockbursting when mining. This potential is no greater than what has been experienced at Henderson in the past.