The mining newspaper for Alaska and Canada's North
The mining newspaper for Alaska and Canada's North
Kiska Metals Corp. Dec. 3 said a recently completed induced polarization survey has detailed significant chargeability and resistivity anomalies that, in conjunction with other geological data, indicate the potential footprint of a significant porphyry copper-gold deposit at the Chuchi project in northern British Columbia.
The anomalies cover the main BP Zone and extend from known zones of copper-gold mineralization into untested areas, and identify new zones that have yet to be drilled.
Drilling completed from 1989 to 1991 returned significant intervals of copper-gold mineralization and higher grade, gold-only mineralization at the BP zone, including: 100 meters grading 0.27 percent copper and 0.37 grams per metric ton gold in hole 89-07; 194 meters grading 0.21 percent copper and 0.21 g/t gold in hole 90-27; and 54.6 meters grading 2.03 g/t Au and 0.09 copper in hole 91-42.
The IP survey, recently conducted by Peter E. Walcott & Associates, consisted of two 5,000-meter-long lines centered on the BP zone.
One line shows near-surface chargeability high anomalies over a width of 2,000 meters that is partly coincident with a magnetic high feature related to monzonitic porphyry intrusions with local magnetite-chalcopyrite veins and breccias.
The resistivity data supports the presence of a resistive intrusive body at depth coincident with the magnetic high feature, and the "Valley" fault zone east of this feature.
In addition, this line also has identified a new chargeability anomaly to the east of the Valley fault zone at a depth of 200 meters below surface.
Kiska said this feature may represent a faulted offset of the BP zone concealed by cover.
The second line was conducted over a postulated south-side fault that displaced the porphyry intrusive center to depth.
The western portion of this line displays flat-lying chargeability anomalies that might cap intrusive rocks and porphyry mineralization at depth; the eastern portion of the line also has identified a potential BP Zone offset east of the Valley fault.
"This IP survey is the first modern exploration to be conducted over the BP zone since it was discovered by drilling 25 years ago," explained Kiska Vice President of Exploration Mike Roberts.
Kiska is currently seeking a partner to help advance this drill-ready project located 32 kilometers (20 miles) to the northwest of the Mt. Milligan copper-gold mine.
Over his more than 16 years of covering mining and mineral exploration, Shane has become renowned for his ability to report on the sector in a way that is technically sound enough to inform industry insiders while being easy to understand by a wider audience.
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