Interra Copper Reports Further Anomalous Cathedral Main Zone Drill Results
Interra Copper Reports Further Anomalous Cathedral Main Zone Drill Results
January 24, 2022
Vancouver, BC – Interra Copper Corp. (CSE: IMCX) (OTCQB: IMIMF) (FRA: 3MX) (“Interra”
or the “ Company”) announces further 2021 summer season drilling results from the Cathedral
Area at its 20,600 hectare Thane Property, located on traditional territory of the Takla and Tsay
Keh Dene First Nations in North-Central B.C.
Results are from drill holes TH21 -3, TH21-4, TH21-6, and TH21-12. TH21-3 and TH21-12 were
designed to test the southern extent of a 600 square meter IP chargeability along line 5300N
within the Cathedral Main zone . TH21-4 was drilled within the Cathedral South zone on the
western extent of IP line 5200. TH21-6 was designed to test a broad, hidden, near surface 200
square meter IP chargeability anomaly approximately 350 meters to the east also on line 5300N.
Drill holes intersected indicator low grade copper -gold mineralization. Anomalous mineralized
intervals of significant copper (Cu), gold (Au), silver (Ag) or molybdenum (Mo) include:
TH21-3
20.65m of 0.08% Copper from 20.10 to 40.75m hole depth.
TH21-4
17.30 m of 0.05% copper, 0.03 ppm gold, 0.2 ppm silver and 7.20 ppm molybdenum from 108.20
to 125.50 m hole depth and a 0.08 Copper Equivalent (“CuEq”) CuEq grade.
TH21-6:
36.71 meters of indicator mineralization within an intercept from 120.0 m to 156.71m hole depth,
containing 0.07% copper, 0.5 ppm silver and 5.0 ppm molybdenum and a “CuEq” grade of 0.09%.
TH21-12
5.00 meters of indicator mineralization within an intercept from 113.35m to 118.35m hole depth,
containing 0.21% copper, 0.07 ppm gold, 0.6 ppm silver and 23.6 ppm molybdenum and a CuEq
grade of 0.28%.
See chart in Table 1 for significant mineralized intercepts.
As with all other holes previously released, mineralization styles intersected within the drill holes
consist of localized, structurally controlled, quartz -pyrite-chalcopyrite-±arsenopyrite fractures,
veins and rare semi -massive mineralization at shallow to moderate depths proximal to diorite -
(quartz) monzonite and latite porphyry contacts and south-southwest to south-southeast trending
moderate to steeply (40-80°) westerly dipping chloritic shears and dilational breccias.
Continued Drilling within the Cathedral Main and the Valley zones on 300N ( see figure 5) focused
on the following;
• 100 meter step out to the south of TH21-1 and TH21-2 to further test mineralization within
the 600 square meter IP chargeability high (up to 34 mV/V with a background of 5 mV/V)
within highly K -spar and silica altered and resistive diorite to (quartz) monzonite and
(quartz) syenite hosts;
• test a broad, blind, near surface 200 square meter IP chargeability anomaly approximately
350 meters to the east.
Drilling within the Cathedral South zone on Line 5200N focused on the following;
• 350m step out to the west of the Cathedral Main zone chargeability targeted the depth
extent of north -south trending, west dipping sheeted -stockwork actinolite -magnetite-
pyrite-chalcopyrite mineralization and the potential for porphyry related potassic alteration
and mineralization at depth below pervasive surficial sodic to sodic-calcic alteration within
an associated chargeability low.
A plan map and cross section of these holes with drill results are included below . See Figure 5
for plan view of relevant drill holes, and Figures 6 through 8 for cross-section view of the drill holes
illustrating mineralized intercepts.
Interra’s goals at the Cathedral Main, Cathedral South, and Valley Areas in 2021 included:
• confirming and expanding hidden copper and gold mineralization to the south, east, west
and at depth from previous surface exploration programs;
• testing near sub-surface chargeability and resistive high and deeper resistive low targeted
areas observed within the 2019 and 2020 IP programs; and
• drilling angled holes across interpreted porphyry related alteration and associated
mineralization and structural zones.
Table 1 – Chart of Cathedral Main Drillhole Composite intervals, Copper Equivalent Calculation
1. True widths of the reported mineralized intervals have not been determined.
2. Assumptions used in USD for the copper equivalent calculation were metal prices of $3.25/lb. Copper,
$1,650/oz Gold, $20/oz Silver, and USD $40/ lb . Molybdenum. Recovery is assumed to be 100% / even
par given no current metallurgical testing at Thane Property to date. The following equation was used to
calculate copper equivalence: CuEq = Copper (%) + (Gold (g/t) x 0.74) + (Silver (g/t) x 0.0090) +
(Molybdenum (ppm) x 0.0006)
Table 1 - THANE PROJECT CATHEDRAL MAIN ZONE Drill Hole Assay Results:
Hole Samp ID From To Length1 Cu (%) Au (ppm) Ag (ppm) Mo (ppm) CuEq 2
TH21-3 Composite 20.10 40.75 20.65 0.08 0.03 0.2 2.5 0.11%
TH21-3 Composite 31.75 40.75 9.00 0.13 0.06 0.2 2.1 0.05%
TH21-4 Composite 108.20 125.50 17.30 0.05 0.03 0.2 7.2 0.08%
TH21-4 Composite 115.95 120.00 4.05 0.13 0.07 0.5 8.7 0.20%
TH21-4 Composite 187.00 193.50 6.50 0.04 0.02 0.2 2.1 0.06%
TH21-4 Composite 240.90 243.00 2.10 0.06 0.01 0.1 33.5 0.09%
TH21-6 43035 75.77 77.00 1.23 0.68 0.06 2.6 65.7 0.78%
TH21-6 Composite 120.00 156.71 36.71 0.07 0.02 0.5 5.0 0.09%
TH21-6 Composite 120.64 148.25 27.61 0.08 0.02 0.5 5.0 0.10%
TH21-6 Composite 120.64 132.98 12.34 0.11 0.03 0.7 7.0 0.14%
TH21-12 Composite 60.21 61.85 1.64 0.08 0.05 0.5 5.0 0.13%
TH21-12 Composite 113.35 118.35 5.00 0.21 0.07 0.6 23.6 0.28%
Interra’s Thane Property summer drill program results to date have confirmed:
• mineralization and associated alteration within the reported intervals above are hosted
within the Thane Creek diorite (207 and 194Ma) and the Duckling Creek monzonite to
syenite (182 and 175Ma) intrusive phases of the Hogem Batholith;
• porphyry related K-spar, lessor albite alteration and structurally controlled quartz-sulphide
vein style mineralization is observed throughout the Cathedral Area;
• late phase tourmaline -quartz-pyrite veining and associated sericitic alteration may be
potentially related to an overprinting upper alkalic-cap;
• Copper-gold mineralization is coincident with near sub -surface, sub-vertical to easterly
dipping areas of moderate to high chargeability observed within the 2019 and 2020 IP
programs;
• sub-vertical to westerly dipping resistive areas observed within the 2019 and 2020 IP
programs appear associated with increased K-spar-quartz±albite alteration and silicified,
interpreted south-southeasterly trending sub-vertical and shallow westerly dipping chloritic
shear structures;
• sulphides of pyrite, chalcopyrite, molybdenite and localized arsenopyrite and bornite occur
as quartz -sulphide veins (Figure 1), fractures and disseminations proximal to intrusive
contacts (Figure 2) localized magnetite veins and breccias (Figure 3), and within
silica±carbonate (calcite) healed and brecciated south-southeasterly trending subvertical
to westerly dipping shear structures (Figure 4) proximal to intrusive contact margins;
• increased copper and gold grades on surface samples are frequently observed proximal
to mapped diorite-(quartz) monzonite sheared contact margins
• both sulphides and areas with increased veining, brecciation and replacement magnetite
are noted to correlate with areas of high chargeability and increased magnetic intensity
within airborne magnetics;
• copper and gold mineralization at depth is at reduced grades to samples collected from
the surface, which may be due to secondary supergene enrichment of the sur face
samples; and
• at least one phase of mineralization within Thane Creek and Duckling Creek suites of
rocks may be related to a later intrusive phase within the batholith.
Figure 1: Isolated pyrite+chalcopyrite veins replacing magnetite with associated pervasive k-spar
alteration proximal to chlorite shear within TH21-12. Sample# 42261 from 113.35m to 114.35m
containing 0.75% Cu, 0.23ppm Au, 1.87ppm Ag and 63.00ppm Mo over 1.00 meter.
Figure 2: Low grade mineralization intersection from 115.82m to 120.14m within TH21-4. Mineralization
occurs within patchy-pervasive albite and silica alteration proximal to chloritic shear on diorite-(quartz)
monzodiorite contact.
Figure 3: Semi-massive magnetite vein infilling chloritic shear and crosscut by quartz-sulphide veins and
fractures. TH21-3 from 39.78 to 41.75m.
Figure 4: Hairline fractures, veins and coarse blebby pyrite and chalcopyrite within silica+calcite healed
and brecciated shear structure within TH21-6. Sample #43035 from 75.77m to 77.00m containing 0.68%
Cu, 0.06ppm Au, 2.62ppm Ag and 65.7ppm Mo or 0.78% CuEq over 1.23 meters.
Figure 5 – Cathedral Area Drill Hole Plan View
Figure 6 – TH21-3 and TH21-12 Drill hole Cross Sections
Figure 7 – TH21-4 Drill hole Cross Section