Interra Copper Extends Cathedral (Gully) Anomalous Zone 800 Metres to the South
Interra Copper Extends Cathedral (Gully) Anomalous Zone
800 Meters to the South
January 14, 2022 - Vancouver, BC – Interra Copper Corp. (CSE: IMCX) (OTCQB: IMIMF)
(FRA: 3MX) (“Interra” or the “Company”) announces further Drilling Results from the Gully 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 TH21-7, TH21-8 and TH21-11 which tested the eastern portion of the
Gully Zone’s IP chargeability anomaly along lines 4700N and 4600N respectively as well as the
southern end of line 6350E. All three holes intersected indicator low grade copper -gold
mineralization. Mineralization styles intersect ed within the drill holes consis ts 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. Significant mineralized intervals
anomalous in some or all of Cu, Au, Ag, Mo include:
TH21-07
24.5 meters of indicator low grade copper-gold intercept from 70.0 m to 94.5 m, with an average
grade of 0.13% Cu, 0.03 ppm gold, and 4.1 ppm molybdenum, and a CuEq of 0.15% CuEq.
TH21-08
TH21-8 contains two indicator style low grade copper-gold intercepts, 19.4 meters of 0.05% CuEq
and 34.5m of 0.04% CuEq,
TH21-011
a low grade indicator style copper gold intercept, a 10.5m composite interval from 82.5 m to 93.0
m, grading 0.14% Cu, 0.07 ppm gold, 0.7 ppm silver and 5.5 ppm molybdenum.
See Table 1 for the chart format of these intercepts and CuEq calculation, and Figure 6 for Drill
hole cross sections.
Table 1 – Chart of Composite intervals and Copper Equivalent Calculations.
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 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 Drill Hole Assay Highlight results:
Hole Samp ID From To Length1 Cu (%) Au (ppm) Ag (ppm) Mo (ppm) CuEq 2
TH21-7 composite 20.50 39.50 19.0 0.05 0.01 0.2 7.0 0.06%
TH21-7 composite 70.00 94.50 24.5 0.13 0.03 0.3 4.1 0.15%
TH21-7 composite 70.00 72.50 2.5 0.84 0.20 2.0 2.1 1.01%
TH21-7 42580.00 72.00 72.50 0.5 3.42 0.75 7.0 1.1 4.04%
TH21-8 composite 47.30 66.70 19.4 0.04 0.01 0.1 2.8 0.05%
TH21-8 composite 47.30 50.30 3.0 0.12 0.03 0.3 2.7 0.15%
TH21-8 composite 108.00 142.50 34.5 0.03 0.01 0.1 3.4 0.04%
TH21-11 composite 26.00 31.67 5.7 0.13 0.05 0.4 1.5 0.17%
TH21-11 composite 82.50 93.00 10.5 0.14 0.07 0.7 5.5 0.20%
TH21-11 42003.00 116.75 117.12 0.4 1.12 0.38 2.9 3.7 1.43%
TH21-11 composite 151.50 155.70 4.2 0.20 0.02 0.7 5.7 0.23%
TH21-11 composite 218.10 220.13 2.0 0.46 0.12 0.8 12.7 0.57%
TH21-11 42091.00 219.10 220.13 1.0 0.83 0.22 1.5 22.0 1.02%
Drilling at the Gully Zone tested the depth potential of the following surface results:
• a 200 square meter IP chargeability high (up to 31 mV/V with a background of 10) within
a highly K-spar and silica altered and resistive diorite to (quartz) monzonite and (quartz)
syenite hosts;
• copper-gold outcrop mineralization of up to 3.13% Cu and 0.18 g/t Au within magnetic high
and lows; and
• soil samples up to 1865 ppm Cu, 0.173 ppm Au, 0.8 ppm Ag and 29.2 ppm Mo.
A plan map and cross section of these holes with drill results are included below. See figure 4 for
plan view of relevant drill holes, and figures 5 and 6 for section view of the drill holes illustrating
the mineralized intercepts.
Interra’s goals at the Gully Zone in 2021 included;
• confirming and expanding copper and gold mineralization at depth from previous surface
exploration programs;
• testing near surface chargeability and coincident resistivity highs targeted areas observed
in the 2019 and 2020 IP programs and
• drilling angled holes across interpreted porphyry related alteration and associated
mineralization and structural zones.
Interra’s results to date have confirmed;
• porphyry related K -spar and lessor albite alteration and structurally controlled quartz -
sulphide vein style mineralization observed at depth at Gully zone;
• late phase tourmaline -quartz-pyrite veining (Figure 1, Table 2 ) and associated sericitic
alteration potentially related to an overprinting upper alkalic-cap;
• Copper-gold mineralization is coincident with near surface high chargeability and K-spar-
quartz±albite altered highly resistive areas observed in the 2019 and 2020 IP programs;
• sulphides of pyrite, chalcopyrite and localized molybdenite, arsenopyrite and bornite occur
as quartz-sulphide veins and fractures (Figure 2, Table 2) and disseminations (Figure 3,
Table 2), proximal to intrusive contacts, shear structures and within localized magnetite
veins and breccias;
• copper and gold mineralization at depth is a t reduced grades to samples collected from
the surface, which may be due to secondary supergene enrichment of the surface
samples;
• both sulphides and magnetite are noted to occur within areas of high chargeability
• mineralization and associated alteration within the reported intervals above are hosted
within the Thane Creek diorite (207 and 194Ma) , Duckling Creek (quartz) monzonite to
(quartz) syenite (182 and 175Ma) and latite porphyry (162.2±2.6Ma) intrusive phases of
the Hogem Batholith (Table 2);
• A Re-Os date of (202.8 +/ -0.8Ma) from molybdenite within a quartz vein taken on a Gail
rock sample is within the Late Triassic to Early Jurassic porphyr y Cu-Au (-Mo) age of
mineralization cluster of 215-205Ma observed within porphyries located throughout British
Columbia (Table 2) and
• at least one phase of mineralization within the Cathedral and Gully zones may be related
to a later intrusive phase within the batholith (Table 2).
Figure 1: Tourmaline+quartz vein cut by pyrite±chalcopyrite and later calcite fractures within TH21-7 @ 69.50m.
Figure 2: Blebby pyrite+chalcopyrite within quartz brecciated magnetite vein containing late coarse calcite
proximal to increased mineralization within TH21 -7 @72.50m. Sample# 42580 containing 3.42% Cu, 0.75g/t
Au, 7.03g/t Ag and 1.13ppm Mo over 0.50m.
Figure 3: Quartz-arsenopyrite-pyrite-chalcopyrite vein with sericite altered margins cutting monzonite within
TH21-11 @83.00m. Sample# 41958 containing 0.19% Cu, 0.20g/t Au, 0.92g/t Ag and 13.70ppm Mo over 0.50m.
Figure 4: Cathedral and Gully Zone Drill Hole Plan Map.
Table 2: Summary of Intrusive Phases, Age, Observed Alteration and Mineralization within Hogem
Batholith at the Cathedral and Gully Zones.
Suite Rock Type Age (Ma) Features Alteration Veining Mineralization
Porphyry
Sheets
Latite Porphyry 162.2 ±2.61 Porphyritic,
20-40%
plag,10-15%
hrnblnd-biotite
w/n a K-
feldspar rich
groundmass
Weak
localized
potassic,
Epidote and
silicification
Qtz-Epi-Cal±
sulphides;
localized Mt-
Act? and Epi-
Prehnite
local
disseminated as
mafic
replacement
Associated with
Qtz-Epi-Cal ±
sulphides
Duckling
Creek
(Quartz)
Syenite
174.7±0.7 to
178.9±1.31
Fine grained
to Pegmatitic,
K-feldspar rich
Weak
localized
potassic,
Epidote and
silicification
Qtz-Epi-Cal±
sulphides;
Local
disseminated
Associated with
Qtz-Epi-Cal ±
sulphides
Duckling
Creek
(Quartz)
Monzonite and
Monzonite
Porphyry
179.7±2.5
and
178.8±0.22
Equigranular,
Fine to
medium
grained, K-
feldspar rich
Pyx-Hrnblnd-
biotite
bearing;
Porphyritic
varieties
contain large
orthoclase
Phenos.
Weak-
extensively
Potassic-
propylitic
altered;
possible
Lithocap
alteration
related to
tourmaline
sericite+pyrite
Qtz-Epi-Cal±
sulphides;
magnetite
veins and
breccias;
Act±Qtz
Disseminated,
mafic and
magnetite
replacement
Associated with
Qtz-Epi-Cal ±
sulphides
Thane
Creek
(Quartz)
Monzodiorite
194±1.11 Equigranular,
Medium to
Coarse
grained, Pyx-
Hrnblnd-plag
bearing;
Weak-
extensively
Potassic-
Sodic altered;
possible
Lithocap
alteration
related to
tourmaline-
sericite+pyrite
Qtz-Epi-Cal±
sulphides;
magnetite
veins and
breccias;
Act±Qtz and
Qtz±chl±
sulphides3
Disseminated,
mafic and
magnetite
replacement
Associated with
Qtz-Epi-Cal ±
sulphides
Gail Zone
Quartz±sulphide
Vein
202.8±0.83
Thane
Creek
Diorite 206.6±0.91
1. LA-ICPMS(Zircon) - Jones, G., Ootes, L., Milidragovic, D., Friedman, R., Camacho, A., Luo, Y., Vezinet, A., Pearson, D.G., and Schiarizza,
P., 2021. Geochronology of northern Hogem batholith, Quesnel terrane, north-central British Columbia. In: Geological Fieldwork 2020, British
Columbia Ministry of Energy, Mines and Low Carbon Innovation, British Columbia Geological Survey Paper 2021-01, pp. 37-56.
2. CA-TIMS(Zircon) - Devine, F.A.M., Chamberlain, C.M., Davies, A.G.S., Friedman, R., and Baxter, P., 2014. Geology and district -scale
setting of tilted alkalic porphyry Cu-Au mineralization at the Lorraine deposit, British Columbia. Economic Geology, 109, 939-977.
3. ALS - Earth and Atmospheric Services Department of the University of Alberta, Re-Os isotopic and age data for molybdenite within a quartz-
sulphide vein from outcrop sample #3288 within the Gail Zone at Interra Copper’s Thane Project in north-central British Columbia.
Figure 5 – TH21-7 and TH21-8 Drill hole Cross Sections
Figure 6– TH21-11 Drill hole Cross Section