District Intersects Strong Visual Polymetallic Sulphide Mineralization at the Tomtebo Property
918-1030 West Georgia Street, Vancouver, BC, V6E 2Y3
Telephone: (604) 288-4430
District Intersects Strong Visual Polymetallic Sulphide
Mineralization at the Tomtebo Property
Vancouver, B.C. April 29, 2024
April 29, 2024 – District Metals Corp. (TSX-V: DMX) (OTCQB: DMXCF) (FRA: DFPP);
(“District” or the “Company”) is pleased to provide an update on the recently completed core
drilling program at the Tomtebo Property located in the Bergslagen Mining District of south-
central Sweden.
Drilling at the Tomtebo Property is part of the CDN $2.0M budget for exploration on the Tomtebo
and Stollberg Properties approved by District and Boliden Mineral AB. As previously announced
District and Boliden Mineral AB have agreed to collaborate on the development of District’s
wholly-owned polymetallic Tomtebo Property and Boliden’s wholly- owned polymetallic
Stollberg Property, pursuant to which District has been appointed as operator (October 30, 2023
and February 20, 2024 news releases).
Drilling at the Tomtebo Property commenced in mid-February where a total of 2,196 m of drilling
in six holes (extension of TOM22-037B, TOM24-039 to -043) was completed (Figures 1 to 4). A
total of 315 samples for multi-element assay and 120 samples for whole-rock lithogeochemistry
were then selected. Drill core samples from these six holes have recently been sent to Boliden’s
Garpenberg Mine for core cutting. The s amples will be sent to ALS Geochemistry in Malå,
Sweden for assay preparation and then to ALS Geochemistry in Loughrea , Ireland for analysis.
Assay results are expected in June.
Highlights
• Strong footwall polymetallic sulphide mineralization encountered at the
Steffenburgs zone: Hole TOM2 4-042 intersected copper-rich semi -massive to
massive sulphide mineralization over approximately 17.0 m ( 309.0 to 326.0 m)
(Figures 1 to 4).
• Additional footwall polymetallic sulphide mineralization from the Steffenburgs zone
includes:
918-1030 West Georgia Street, Vancouver, BC, V6E 2Y3
Telephone: (604) 288-4430
o Hole TOM24-041 intersected multiple intersections of disseminated to
stringer-style copper-rich sulphide mineralization over approximately 60.0 m
(190.0 to 250.0 m).
o Hole TOM24-043 intersected intermittent disseminated copper-rich sulphide
mineralization over approximately 21.0 m (327.0 to 348.0 m).
• Down-hole electromagnetic results show multiple off -hole conductors: all drill holes
were followed up by Boliden’s in- house, state of the art, down- hole, three component
electromagnetic (DHEM) survey1, and holes TOM24-037B, 041 to -043 showed both in-
hole and off-hole EM conductors that likely represent sulphide mineralization.
Rodney Allen, Technical Advisor for District, commented: “The most important exploration
guide to track down volcanogenic massive sulphides (VMS) is to define where in the stratigraphic
succession the original sea floor horizon that the VMS formed on occurs, and to then follow this
"mineralized horizon" along strike and down- dip to locate the VMS lenses using the tools of
geology, geochemistry and geophysics. VMS deposits always occur in clusters and each deposit
generally comprises a cluster of massive sulphide lenses separated by less mineralized rock.
Therefore, we can be certain that the massive sulphide that we intersected previously at the
Steffenburgs zone is not the only massive sulphide lens in the Tomtebo system. Consequently,
we designed hole TOM22-037B to locate and test the mineralized horizon to the northeast of the
Steffenburgs zone and holes TOM24- 039 and TOM24- 040 to locate and test the mineralized
horizon west of Steffenburgs. We anticipate that these holes have intersected the mineralized
horizon, interpretation of the lithogeochemical samples taken in the drill cores is required in order
to be certain. Holes TOM22- 037B, TOM24-039 and -040 all intersected moderately to strongly
hydrothermally altered volcanic rocks, which indicates that they are still within the Tomtebo
mineral system. However, mineralization is weak and the alteration is interpreted to represent
medial to distal types that occur several tens to hundreds of met ers from potentially high grade
mineralization. Consequently, further drilling will step out further along strike and/or drill deeper
at these localities.
Holes TOM24-041 to -043, which drilled the Steffenburgs zone, all intersected intense proximal
footwall-style alteration and associated footwall "stringer" sulphide veins and sulphide
impregnation. In addition, TOM24- 042 intersected extensive strong semi -massive to massive
sulphide mineralization, which could be intense footwall mineralization rather than the sea floor
massive sulphide; again, here we require results from the lithogeochemical sampling to be certain
of the exact location of the ancient sea floor ore horizon. Strong footwall alteration and
mineralization are more widespread than the overlying sea floor massive sulphide lens at
Steffenburgs zone. Consequently, some drill holes intersect high grade mineralization within the
footwall and little or no massive sulphide at the actual sea floor "mineralized horizon", whereas
other holes intersect both semi-massive to massive sulphide in the footwall and massive sulphide
at the mineralized horizon. This is normal in VMS exploration. Delineation of the sea floor
massive sulphide lenses, which typically contain the highest grades, requires systematic drilling.”
Garrett Ainsworth, CEO of District, commented: “ The highlight of our recently completed drill
program at Tomtebo is hole TOM24-042, which encountered 17.0 m of continuous semi-massive
to massive polymetallic sulphides. We were pleasantly surprised with the visual content of
918-1030 West Georgia Street, Vancouver, BC, V6E 2Y3
Telephone: (604) 288-4430
copper-rich sulphides (chalcopyrite), which are often associated with elevated gold values at the
historic Tomtebo Mine. Polymetallic sulphide mineralization at the Steffenburgs zone remains
open at depth.
The use of Boliden’s DHEM survey identified significant off-hole electromagnetic conductors in
Hole TOM24 -042 and in several other drill holes that are likely associated with sulphide
mineralization that will require follow up.”
918-1030 West Georgia Street, Vancouver, BC, V6E 2Y3
Telephone: (604) 288-4430
Figure 1: Plan Map of Drilling at Tomtebo
918-1030 West Georgia Street, Vancouver, BC, V6E 2Y3
Telephone: (604) 288-4430
Figure 2: Simplified 3D Model Looking Southeast at Steffenburgs Zone
918-1030 West Georgia Street, Vancouver, BC, V6E 2Y3
Telephone: (604) 288-4430
Figure 3: Simplified Cross Section Looking Northeast at Steffenburgs Zone
918-1030 West Georgia Street, Vancouver, BC, V6E 2Y3
Telephone: (604) 288-4430
Figure 4: TOM24-042 Sulphide Mineralization from 312.4 to 326.5 m
Drill Hole Summaries
Extension TOM22-037B (900 m step out northeast from historic Tomtebo Mine):
Hole TOM22-037B was drilled in 2022 at an angled orientation ( -50° dip) to the south (180°
azimuth) to 357.9 m. It was designed to test a blind magnetic high anomaly along the interpreted
VMS mineralized horizon located 900 m northeast along trend from the historic Tomtebo Mine.
Interpretation of the lithogeochemical samples taken in 2022 indicated that the hole did not pass
918-1030 West Georgia Street, Vancouver, BC, V6E 2Y3
Telephone: (604) 288-4430
the mineralized horizon and warranted continuation. TOM22- 037B was extended by 200 m to
557.75 m.
Strong silicif ication and locally albit e altered felsic mass flow deposits/pumice breccia were
intersected up to 440 m. The alteration changed gradually from weak to moderate silica -biotite-
muscovite alteration to strong silica -biotite-amphibole-garnet alteration up to 547 m. Narrow
intervals of amphibole skarn replacing former carbonate rich layers were encountered at 516 to
523 m and 535 to 538 m. Small patches of up to 5% disseminated pyrite and pyrrhotite occurred
at 514 to 525m, 535 to 541 m and 542 to 545 m. Alteration weakened from 547 m and the host
has been interpreted as fine to medium grained, feldspar -quartz dominated felsic ash silt-
sandstone. A weak BHEM off-hole anomaly was interpreted at ~240 m down-hole.
TOM24-039 (700 m step out northwest from historic Tomtebo Mine):
Hole TOM24-039 (326.9 m) was drilled at an angled orientation (-50° dip) to the southeast (159°
azimuth). It was designed as a geological hole to test the interpreted VMS mineralized horizon
located roughly 700 m northwest from the historic Tomtebo Mine.
After 15 m of overburden, the hole intersected weak to locally moderate altered felsic
volcani(clastic) rocks with local meter-size cross cutting mafic dykes up. Trace pyrite is observed
as local patches. BHEM did not reveal any off-hole anomalies. Pending lithogeochemical results
should determine the rock precursor and alteration intensity.
TOM24-040 (500 m step out northwest from historic Tomtebo Mine):
Hole TOM24-040 (263.8 m) was drilled at an angled orientation (-50° dip) to the southeast (158°
azimuth). It was designed as a geological hole to test the interpreted VMS mineralized horizon
located roughly 500 m north west from the historic Tomtebo Mine and a 200 m step- out from
TOM24-039.
This hole intersected similar geology as TOM24-039, although alteration is more present. A zone
of strong amphibole-garnet-cordierite-biotite-muscovite-silica altered felsic volcanic rocks with
trace to 2% disseminated pyrite was observed between 159 to 175 m. A greenish, fine to medium
grained, amphibole-pyroxene dominated skarn(?) with trace of pyrite -chalcopyrite was noticed
from 202 to 226 m. A weak BHEM off -hole anomaly was interpreted at ~125 m down-hole.
Pending lithogeochemical sampling should determine the rock precursor and alteration intensity.
TOM24-041 (Steffenburgs Zone)
Hole TOM24-041 (362.8 m) was drilled at an angled orientation ( -59° dip) to the northeast (37°
azimuth). It was designed to step out 60 m down dip from massive sulphides encountered in hole
TOM22-038, which returned 25.5 m at 8.2% ZnEq 2 (249.0 to 274.1 m), including a 0.40m
interval at 384 g/t Au and 855 g/t Ag (273.7 to 274.1 m).
After 16 m of overburden, the hole intersected moderate to strongly altered felsic volcanic rocks
with local disseminated to stringer-style pyrite (0.1 to 1.0%, and up to 20%) and pyrrhotite (0.1