MTT.V · 2025-08-13 12:00:00

Magna Terra Receives Copper Assays up to 1.26% Cu from New Discovery at the Humber Copper-Cobalt Project in Newfoundland; Expands Zone of Surface Mineralization to 1 Kilometre and Acquires Additional Claims

Drill Results Mergers & Acquisitions

Magna Terra Receives Copper Assays up to

1.26% Cu from New Discovery at the Humber

Copper-Cobalt Project in Newfoundland;

Expands Zone of Surface Mineralization to 1

Kilometre and Acquires Additional Claims

Toronto, Ontario--(Newsfile Corp. - August 13, 2025) -

Magna Terra Minerals Inc.

(TSXV:

MTT)

Magna Terra

" or the "

Company

") is pleased to announce that it has received initial assays

from prospecting at its recently discovered zone of copper mineralization on the 100% owned Humber

Copper-Cobalt Project (the "Humber Project" or the "Project") located in western Newfoundland

(

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 with 5 samples selected for rush analysis. The rushed rock float

and outcrop samples^ returned between

0.07% and

1.26%

, and between 0.2 and 2.8 g/t Ag

(

Figure 3

). Additional prospecting and geological mapping since the previous news release has

expanded the lateral extent of copper mineralization to a

minimum

strike length of 1.0 kilometres

Analytical results for the remaining 56 samples are pending and will be reported in a future news

release.

The discovery of copper mineralization in bedrock is located on the east end of the Hughes Lake Trend.

Copper mineralization from outcrop and subcrop rock grab samples^ comprises between 0.5 to 5%

combined, fracture-controlled, foliation parallel stringers and disseminated, malachite, bornite, and

chalcopyrite hosted within dolomitized limestone and adjacent altered clastic sedimentary rocks that

marks the first occurrence of copper noted on this under-explored property (

Figures 4 and 5

). Initial 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.

The Company is also pleased to announce that based on these results it has acquired an additional 4

mineral licences (112 claims) comprising 2,800 hectares adjacent to and contiguous with the Humber

Project. The Humber Project now comprises a total of

43,475 hectares

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.

"It is very encouraging to encounter surface copper values of up to 1.26% Cu so early into the initial

exploration program on the Humber Project. This zone of in-situ Cu mineralization has now been

expanded to a minimum strike length of 1,000 metres. This important discovery supports our concept

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 now expanded property. We

look forward to updating shareholders with results from additional and ongoing work on the Project that

includes a regional airborne magnetic and electromagnetic survey and regional soil sampling.

"At the Humber Copper-Cobalt Project, we have assembled a rare, first-mover, district-scale project

opportunity, that will continue to leverage our expertise. We are eager to demonstrate the Project's

prospectivity focused on critical metal discovery and the value we believe this Project brings to our

investors."

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

Humber Project Highlights

Potential for discovery of significant Cu-Co deposits;

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

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 43,475 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.

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