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Red Chris Drill Hole Returns 1.7% Copper and 3.3 g/t Gold Over 276 Metres

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Red Chris Drill Hole Returns 1.7% Copper and 3.3 g/t Gold Over 276 Metres






Imperial Metals Corporation (TSX:III) reports partial results from a drill hole located in the deep East zone at the Red Chris mine, and updates on drill programs by Newcrest, operator of the Red Chris Joint Venture.


There are two drilling campaigns presently underway at Red Chris. The first is the East Zone Resource Definition Programme which is designed to obtain geological, geotechnical and metallurgical data to support future studies for underground block cave mining. The second is the Brownfields Exploration Programme, which is searching for additional zones of higher grade mineralization within the Red Chris porphyry corridor. A total of 9,235 metres of drilling has been completed since December 2019, contributing to a total of 26,735 metres of drilling being completed since Newcrest acquired its interest in the joint venture on 15 August 2019.


The East Zone Resource Definition Programme comprises 16 angled drill holes of which seven have been completed. Latest results are:


  •  RC600 returned:
  • 188m @ 0.52 g/t Au and 0.54% Cu from 570m
  • including 64m @ 0.86 g/t Au and 0.89% Cu from 658m
  • including 20m @ 1.3 g/t Au and 1.3% Cu from 662m
  •  RC602 returned:
  • 386m @ 0.43 g/t Au and 0.46% Cu from 458m
  • including 88m @ 1 g/t Au and 0.91% Cu from 596m
  • including 44m @ 1.3 g/t Au and 1.1% Cu from 622m
  •  RC611 returned:
  • 276m** @ 3.3 g/t Au and 1.7% Cu from 684m
  • including 266m** @ 3.5 g/t Au and 1.7% Cu from 684m
  • including 150m @ 5.6 g/t Au and 2.5% Cu from 688m
  • including 74m @ 9.1 g/t Au and 3.8% Cu from 720m
  • including 22m @ 13 g/t Au and 4.7% Cu from 738m

** partial intercept awaiting results for the remainder of the hole


Drilling continues to refine the overall geometry of the system and controls to high-grade gold-copper mineralization within a sub-vertical zone approximately 600 metres long, 300 metres wide, and 600 metres vertically. Mineralization is supported by extensive historical Imperial drilling data. On completion of the East Zone Resource Definition Programme, Newcrest intends to construct a new Resource Model incorporating both historical and Newcrest drilling data.


Results from RC611 have confirmed the presence of a discrete high grade zone averaging more than 5 g/t gold. Though this zone was previously intersected by Imperial, RC611 was the first angled hole intersection which has confirmed this high grade ‘pod’ as being approximately 100 metres long, 100 metres wide and 200 metres in height. The hole was drilled at minus 58° at an azimuth of 145° from the northwestern side of the east pit, and was designed to provide detailed geological and geotechnical information at depth in the East zone. The hole also cuts across the high grade intercept in vertical hole RC09-350 drilled in 2009, which intersected 432.5 metres of 2.00% copper and 3.80 g/t gold. The strong gold to copper ratio in RC611 is consistent with other drill intercepts in the deep East zone.


Further drilling is planned to more clearly understand the full potential of this zone and to search for additional high grade pods within East zone. The underground mining Concept Study currently in progress will evaluate the option of stoping high grade pods before other bulk underground mining methods such as block caving or sub level cave mining. Work also continues on evaluating the commencement of a decline late in the 2020 calendar year to further enhance and accelerate exploration efforts, with such a decline also being of use for any underground mining operation.


Hole RC611 is a partial intercept and Newcrest is awaiting results for the remainder of the hole, however the high grade zone is not expected to extend beyond the reported interval.


The Brownfields Exploration Programme continued, with 6 holes completed and is designed to search for new zones of high-grade gold-copper mineralization within the porphyry corridor.


New results from the Gully zone include:


  •  RC608R returned:
  • 204m @ 0.45 g/t Au and 0.29% Cu from 634m
  • including 46m @ 0.68 g/t Au and 0.38% Cu from 636m


Drilling continues to expand the footprint of mineralization in the Gully Zone and Far West. Mineralization has been observed over a broad area 800 metres long, 800 metres wide and over 1,000 metres vertically. The best grades within this area, which are more than 0.5 g/t gold, are in at least five discrete zones open in multiple directions requiring additional follow-up drilling to determine their full extent.


Red Chris is a joint venture between Newcrest (70%) and Imperial Metals Corporation (30%), with Newcrest having acquired its interest in the joint venture on 15 August 2019.


Red Chris significant intercepts



Drill Holes From (m) To (m) Width (m) Gold (g/t) Copper (%)
RC600 570 758 188 0.52 0.54
including 658 722 64 0.86 0.89
including 662 682 20 1.3 1.3
RC602 458 844 386 0.43 0.46
including 596 684 88 1.0 0.91
including 622 666 44 1.3 1.1
RC608R 634 838 204 0.45 0.29
including 636 682 46 0.68 0.38
RC611 684 960 276** 3.3 1.7
including 684 950 266** 3.5 1.7
including 688 838 150** 5.6 2.5
including 720 794 74 9.1 3.8
including 738 760 22 13.0 4.7

**partial intercept, assays pending


Jim Miller-Tait, P.Geo., Imperial VP Exploration, is the designated Qualified Person as defined by National Instrument 43-101 for the Red Chris exploration programs, and has reviewed this news release. Red Chris samples for the drilling reported were analysed at Bureau Veritas Mineral Laboratories in Vancouver. A full QA/QC program using blanks, standards and duplicates was completed for all diamond drilling samples submitted to the labs. Significant assay intervals reported represent apparent widths. Insufficient geological information is available to confirm the geological model and true width of significant assay intervals.


About Imperial


Imperial is a Vancouver exploration, mine development and operating company. The Company, through its subsidiaries, owns a 30% interest in the Red Chris mine, and a 100% interest in both the Mount Polley and Huckleberry copper mines in British Columbia. Imperial also holds a 45.3% interest in the Ruddock Creek lead/zinc property.


Posted March 11, 2020

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