MTT.V · 2025-09-18 12:00:00

Magna Terra Identifies Airborne Conductors, Expands Property, and Reports Additional Copper and Gold Assays at the Humber Copper-Cobalt Project in Newfoundland

Exploration Programs

Magna Terra Identifies Airborne Conductors,

Expands Property, and Reports Additional

Copper and Gold Assays at the Humber

Copper-Cobalt Project in Newfoundland

Toronto, Ontario--(Newsfile Corp. - September 18, 2025) -

Magna Terra Minerals Inc.

(TSXV:

MTT)

Magna Terra

" or the "

Company

") is pleased to announce that it has received airborne

magnetic and electromagnetic data from its recently completed VTEM™ Plus survey completed at its

100% owned Humber Copper-Cobalt Project (the "Humber Project" or the "Project") located in western

Newfoundland. Preliminary review of the geophysical data indicates the presence of zones of

conductivity that are spatially coincident with cobalt-bearing lake sediments, as further detailed below.

The discovery of conductive units on the property has led to additional staking of mineral licences

adjacent to the current land position. An additional 5 mineral licences totalling 6,450 hectares were

acquired via map staking. The Humber Project now comprises a total of 21 mineral licences totalling

49,925 hectares.

The Company is also pleased to announce that it has received additional assays from prospecting at its

recently discovered zone of copper mineralization along the Hughes Lake Trend (

Figures 1 and 2

;

see

news release dated July 17, 2025

). A total of 61 rock samples were collected during an initial phase of

prospecting and results have been received for all samples collected to date. Prospecting and

geological mapping has outlined copper mineralization over a

minimum

strike length of 1.0

kilometres

with the zone being open for expansion along strike and at depth. In addition, copper and

gold mineralization assaying up to 422 ppb gold and 0.07% copper was discovered in mafic volcanics

along the Hughes Lake Trend (

Figure 3

Magna Terra would like to acknowledge and thank both the Province of Newfoundland and Labrador and

the Atlantic Canada Opportunities Agency ("ACOA") for their financial assistance through the Junior

Exploration Assistance ("JEA") program for work on the Humber Copper-Cobalt Project.

Humber Project Highlights

Discovery of 1 km of copper mineralization at Hughes Lake;

Host to regionally anomalous Cu, Co, Ag, Pb +/- Au, Mo, As, and Sb lake sediments;

Airborne conductors coincident with lake sediment anomalies;

8+ km Hughes Lake Copper-Cobalt Trend;

Analogous to the Kalahari Copper Belt, Namibia and Botswana; Central African Copper Belt,

Zambia and the Democratic Republic of Congo (DRC); and the Kupferschiefer Belt, Poland;

Globally, these Sediment-hosted Stratiform Copper ("SSC") deposit types represent 20% of Cu

production** and 60% of Co production^^;

District-scale land package now comprising 49,925 hectares;

Located within the premier mining jurisdiction of Newfoundland and Labrador;

Year-round accessibility with road access to the majority of the Project;

First mover advantage in a previously unrecognized area of exploration potential; and

Acquired through staking - cost effective acquisition and with no underlying royalties or option

payments.

"We are very pleased with the additional copper results from our new discovery at the Humber Project.

These results outline a zone of copper mineralization over a minimum 1 kilometre strike length with

assays up to 1.26% Cu. The zone of in-situ Cu mineralization is open along strike and down dip. The

discovery of gold-copper mineralization within nearby mafic volcanic rocks further supports the

significant discovery potential on the Humber Project. Preliminary review of the airborne magnetic

and electromagnetic data is demonstrating coincident zones of conductivity with previously identified

elevated cobalt lake sediment data which is very encouraging. We have staked additional claims to

incorporate potential strike length extensions of these conductive zones. While early stage, these

initial generative results further support our view that the Humber Project has the potential to host

Sediment-hosted Stratiform Copper deposits, and our exploration team is currently assessing

additional targets across the expanded project. We will be undertaking additional regional

geochemical sampling, prospecting, and mapping within the greater Project area focused on

prospective areas highlighted by the airborne geophysical data, to commence in the next few weeks."

~ Lew Lawrick, President and CEO, Magna Terra Minerals Inc.

Airborne Geophysical Targets

Magna Terra contracted GeoTech Ltd. ("GeoTech") from Aurora, ON to conduct an airborne magnetic

and electromagnetic survey using the VTEM™ Plus ("Versatile Time-Domain Electromagnetic") system,

over the Project area. GeoTech conducted the survey from May 29th to July 11th, 2025 with flight lines at

200 m line-spacing and tie lines at 2,000 m spacing totaling 2,436 line-km.

The preliminary interpretation of the geophysical survey results show linear magnetic anomalies that

suggest complex compositional differences within the regional bedrock geology of the Humber

Allochthon marine sedimentary units as well as potential regional-scale structures and secondary and

tertiary deformation features (

Figure 4

). In general, lake sediment copper anomalies coincide with

magnetic low domains and may suggest potential copper mineralization associated with structures.

Large km-scale conductive trends are located within all Project blocks and generally coincide with cobalt

in lake sediment anomalies (

Figure 5

). These initial results show promise for copper-cobalt

mineralization within the Humber Project and have provided exploration target areas for follow-up field

work.

Hughes Lake Trend Discovery

A total of 61 rock grab samples^ were collected during an initial phase of prospecting in the vicinity of

the Hughes Lake Trend (

Figures 3

6, and 7

). The results have further substantiated the copper

discovery announced in the news release dated August 13, 2025. The newly discovered copper

occurrence is defined by a 1-kilometre trend of chalcopyrite-bornite-malachite mineralization associated

with pyrite and specular hematite and hosted in foliated, dolomitized limestone and adjacent altered

clastic sedimentary rocks of the Little North Pond Formation, Fleur de Lys Supergroup. A total of 20 grab

samples, of which 17 are from outcrop, range from 28 ppm up to 12,600 ppm copper with 11 samples

grading above 0.12% and up to 1.26% copper and between 0.2 and 4.1 g/t Ag. Copper mineralization is

characterized by fabric parallel lenses and stringers and local stockwork quartz-carbonate veining.

Malachite is also locally hosted along fractures.

Gold mineralization from grab samples assaying up to 422 ppb gold hosted within quartz-epidote-

malachite veins within highly deformed mafic volcanic rocks along the Hughes Lake Trend. This

occurrence marks the first discovery of gold within the Project area (

Figure 3

Initial and ongoing field work consisting of prospecting, geological mapping, and the collection of 1,700

soil samples is focused on following up on the Hughes Lake Trend where an 8-kilometre-long anomalous

zone of copper and cobalt in historic soil samples* is coincident with mafic volcanic rocks of the Hughes

Lake Complex and associated magnetic rocks.

Lake Sediment Geochemistry and Global Analogues

The Project is underlain by rocks of the sedimentary Humber Arm Allochthon and adjacent plutonic and

volcanic Hughes Lake Complex, which is centred on a series of anomalous lake sediment samples

(Davenport et al., 1996) that show regionally elevated levels of Co (up to 160 ppm), Ag (up to 0.6 ppm),

Pb (up to 84 ppm), Cu (up to 185 ppm), As (up to 142 ppm), Mo (up to 15 ppm), and Au (up to 10 ppb).

An analysis of the lake sediment geochemical data via Principal Component Analysis has indicated that

the metal suite present within the Project area is likely related to a black shale source, as many of the

anomalous lake sediments have low-Ni values which precludes association with the nearby ophiolite

complexes to the immediate west.

This metal signature (Cu, Co, Ag, Pb +/- Au, Mo, As, Sb) and geological environment is supportive of the

area being host to SSC deposits. SSC deposits host 60% of global Cobalt production^^ and 20% of

global Copper production** in deposits such as the Central African Copper Belt, which is thought to be

analogous to the geological setting of the Humber Copper-Cobalt Project. SSC deposits are often

laterally continuous along bedding and contain consistent grades (1.2 to 5% Cu)** and large resources

of by-product Au, U, platinum-group, and rare-earth elements. The exploration potential is also

underscored by the presence of base metal deposits nearby including the York Harbour and Daniels

Harbour Deposits located at lower stratigraphic levels of the region.

Figure 1:

A map showing the Humber Project with underlying geology of the Humber Arm Allochthon,

coincident anomalous C

(ppm) lake sediment samples and location of the Hughes Lake Block.