Latest drilling expands Kamoa North copper discovery New corridor of shallow, high-grade copper mineralization
November 14, 2018
Latest drilling expands Kamoa North copper discovery
New corridor of shallow, high-grade copper mineralization
– extending for at least nine kilometres – delineated by ongoing
drilling is projected to continue onto adjacent Western Foreland
exploration licences 100%-owned by Ivanhoe
KOLWEZI, DEMOCRATIC REPUBLIC OF CONGO – Robert Friedland and Yufeng “Miles” Sun,
Co-Chairmen of Ivanhoe Mines (TSX: IVN; OTCQX: IVPAF), announced today that exploration
drilling at the Kamoa North prospect area, on the 397-square-kilometre Kamoa-Kakula mining
licence, approximately 25 kilometres west of the mining centre of Kolwezi in the Democratic
Republic of Congo (DRC), has successfully delineated two new, continuous corridors of shallow
copper mineralization containing zones of thick, high-grade copper.
The newly delineated copper corridors occur on the western flank of the un-mineralized Kamoa
Dome at Kamoa North. The most significant corridor trends north and south for more than nine
kilometres before swinging to the northwest and is projected to continue onto the adjacent
Western Foreland exploration licences that are 100%-owned by Ivanhoe Mines. The second
corridor trends west-southwest, away from the Kamoa Dome and toward the West Scarp Fault,
over a distance of three to four kilometres.
“Our latest exploration success, at Kamoa North, provides additional options for mine planning
and sequencing at Kamoa-Kakula,” said Mr. Friedland. “The unparalleled strength and
continuity of the high-grade mineralized trends on the Kamoa-Kakula Project also bode well for
the potential for further success right next door, on Ivanhoe’s 700-square-kilometre Western
Foreland exploration licences, north and west of Kamoa-Kakula.”
The tier-one Kamoa-Kakula Project is a joint venture between Ivanhoe Mines, Zijin Mining and
the DRC government.
An independent Mineral Resource estimate published last February established Kamoa-Kakula
as the world’s fourth-largest copper discovery. Kamoa-Kakula’s copper grades are the highest,
by a wide margin, of the world’s top 10 copper deposits (see Figure 9, page 14).
The Kamoa North Exploration Area is approximately 12 kilometres north of Kamoa’s Kansoko
Mine development and approximately 20 kilometres north of the Kamoa-Kakula Project’s
planned initial mine at the Kakula Deposit (see Figure 1, page 2). The discovery area already is
accessible by an all-season road that connects with the provincial road to Kolwezi and is close
to the newly installed electricity line running from Kamoa North to the planned Kansoko and
Kakula mines.
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Figure 1. Kamoa-Kakula mining licence, showing the two newly defined corridors
(see 1 and 2 circled below) with high-grade copper zones* at the Kamoa North
Exploration Area, the Kamoa and Kakula Mineral Resource areas and the
adjacent Western Foreland exploration-licence area.
*Grade contours in the Kamoa North exploration area in Figure 1 are for illustration purposes only. See
Figure 3 and Figure 4 for actual contours of copper grade at Kamoa North for 1% and 2% composites.
Kamoa North exploration success based on updated interpretation
Exploration drilling in 2017 and 2018 in the Kamoa North area targeted structural- and
lithological-controlled grade trends recognized during the targeting reviews in early 2017 that
identified multiple target areas on the Kamoa-Kakula mining licence. Continuity of copper
grades along these trends has been largely confirmed. Drilling will continue in 2018 and early
2019, with the intention of updating the Kamoa North Mineral Resource area in 2019.
The newly delineated copper corridors are indicated with dashed and dotted lines in figures 3
and 4 (pages 6 and 7). The corridors are partly within the previously defined Inferred Mineral
Resources, but the definition provided by additional drilling has allowed significantly increased
continuity of grade to be established and then extended along strike into previously untested
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areas. The recognition of high-grade trends in areas previously tested by wider-spaced drilling
reflects a growing understanding of the controls on mineralization at Kamoa-Kakula (Figure 6).
Mineralization thicknesses range from three metres up to 18 metres at a 1% copper cut-off. The
mineralized horizon generally is in the region of 150 metres to 300 metres below surface, except
on the west side of the West Scarp Fault (see Figure 2), where it strikes roughly north–south
and dips gently to the west at between five and 10 degrees (see Figure 7).
Sulphide mineralization at Kamoa North tends to be bottom-loaded and shows typical
downward zonation from chalcopyrite to bornite to chalcocite. Chalcopyrite dominates in the
lower grade intercepts and when mineralization extends into the overlying pyritic siltstone. Fine-
grained bornite and chalcocite dominate in the highest-grade intersections (see Figure 8).
Selected drill holes from the Kamoa North drilling program:
DD1396 intersected 18.26 metres (true width) of 5.73% copper, at a 1.0% copper cut-off, and
17.27 metres (true width) of 5.98% copper at a 2.0% copper cut-off, from a downhole depth
of 233.60 metres.
DD1382 intersected 8.05 metres (true width) of 4.45% copper, at a 1.0% copper cut-off, and
7.55 metres (true width) of 4.66% copper at a 2.0% copper cut-off, from a downhole depth of
199.5 metres.
DD1213 intersected 6.97 metres (true width) of 4.08% copper at a 1.0% copper cut-off, and
6.44 metres (true width) of 4.26% copper, at a 2.0% copper cut-off, from a downhole depth of
226.45 metres.
DD1406 intersected 14.92 metres (true width) of 3.18% copper at a 1.0% copper cut-off, and
7.26 metres (true width) of 4.54% copper, at a 2.0% copper cut-off, from a downhole depth of
231 metres.
DD1408 intersected 5.99 metres (true width) of 5.26% copper at a 1.0% copper cut-off, and
4.45 metres (true width) of 6.88% copper, at a 2.0% copper cut-off, from a downhole depth of
527 metres.
Table 1, on page 12, contains a complete list of assay results, at 1% and 2% copper cut-offs, for
the drill holes completed at Kamoa North since the last resource update. Table 1 includes 13
holes drilled in 2017 that were included in the March 2018 Kamoa-Kakula Technical Report as
drilling completed since the effective date of the Resource estimate.
“The discovery of these new, high-grade zones at Kamoa North clearly demonstrate Kamoa-
Kakula’s remarkable potential to significantly increase the project’s current copper resources,”
said Mr. Friedland. “Kamoa-Kakula already is the world’s fourth-largest copper discovery on the
planet in terms of contained copper.
“What our mining engineers find particularly attractive about the Kamoa North discovery is that
the copper mineralization is thick, flat lying and relatively shallow. The high-grade copper also
is generally bottom-loaded, similar to our earlier Kakula and Makoko discoveries, and should be
ideally suited to mining at elevated copper cut-off grades.”
Mr. Friedland reiterated that Ivanhoe and Zijin are firmly committed to fast-tracking Kamoa-
Kakula’s first mining operation at Kakula. “Based on the findings of the independent preliminary
economic assessment completed a year ago, the resources we’ve discovered at Kakula should
allow Ivanhoe and Zijin to build a world-scale, highly-mechanized, underground copper mine
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producing at an initial mining rate of six million tonnes a year, and potentially amenable to
subsequent stages of phased mine expansions up to 18 million tonnes a year, and beyond.”
Exploration drilling continuing
Ivanhoe and Zijin are continuing with exploration and step-out drilling around the presently
defined Mineral Resource boundaries at the Kamoa and Kakula discoveries. Eight drills are
operating at Kamoa-Kakula. One rig is drilling resource-extension holes at Kakula Main; two rigs
are drilling infill holes at Kakula West; three rigs are drilling step-out holes at Kakula West; and
two rigs are drilling exploration/step-out holes at Kamoa North. Approximately 74,000 metres of
a planned 81,000-metre, 2018 drilling program have been completed to date this year.
Range of mine-development options under study
The pre-feasibility study (PFS) for the planned, initial six million-tonne-per-annum (Mtpa) Kakula
Mine is expected to be completed early in 2019. This PFS will provide more detailed information
related to the project’s economic assumptions and will incorporate results from detailed
engineering and optimization work.
Ivanhoe and Zijin also are exploring potential options to expand future production. The 2017
PEA noted the potential for a 12 Mtpa scenario, to be achieved through the sequential
development of both the Kakula and Kansoko mines. Based on subsequent discoveries,
including Kakula West, Ivanhoe and Zijin also are exploring the potential for expanding
production to 18 Mtpa, and beyond.
Exploration is continuing to progress at Kamoa-Kakula and to the west, on Ivanhoe’s 100%-
owned exploration licences in the adjacent Western Foreland area, where drilling recently
discovered a large, high-grade zone of copper at Makoko.
Ivanhoe believes this phased approach to building what ultimately could become one of the
world’s largest copper-mining complexes will provide an attractive combination of lower initial
capital cost while maintaining key operating efficiencies and economies of scale.
The newly delineated, high-grade zones are near surface and flat lying. Given this depth and dip,
they could be amenable to traditional, non-fill room-and-pillar-style mining that can provide high
mining recovery, is highly productive and economically efficient.
Mr. Friedland said that potential construction of an additional shallow access decline in the
Kamoa North area will be studied, which would expand the range of options presently being
considered for the development of Kamoa-Kakula.
“We remain confident that there are more high-grade copper discoveries to be made in the area
and that the ultimate scale of mining operations at Kamoa-Kakula will be much larger than
currently modelled by a number of analysts and investors,” Mr. Friedland added.
“Additional exploration successes could have a significant influence on the scale, value and
timing of the overall development plan. Our Kamoa-Kakula plans will be reassessed and
amended as supported by our discoveries.”
Figure 2. Collar location plan, showing depth to top of SMZ.
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Figure 3. Contours of copper grade for 1% composites.
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Figure 4. Contours of copper grade for 2% composites.
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Figure 5. Contours of true width for 1% composites.