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Orosur Mining Inc - Lithium JV, Nigeria

Partnerships & JV

Orosur Mining Inc - Lithium JV, Nigeria

• Company signs Exploration JV to cover four licences across the

Nigerian Lithium belt.

• Exploration programs to start immediately.

• Full exploration team and infrastructure in place.

London, October 16th 2023. Orosur Mining Inc. ("Orosur" or the

"Company") (TSXV/AIM:OMI), the minerals explorer and developer

operating in Colombia, Argentina and Brazil, is pleased to announce that as

a continuation of the Company's strategy of securing high quality mineral

exploration opportunities in key jurisdictions, the Company has signed a

joint venture ("JV") agreement to explore a number of exploration licences

across Nigeria (the "Project") which the Company considers to be highly

prospective for Lithium mineralisation.

The Company has long been examining an entry into the Lithium space to

add to its diversified portfolio of high-quality exploration assets but had

found few attractive South American opportunities.

Nigeria however is rapidly emerging as one of the most prospective regions

of Africa for the discovery of lithium pegmatite mineralisation and as such is

now seeing a very high level of interest and activity. The Company's

executive team has substantial operating experience and high-level

relationships in Nigeria, and the Company has been leveraging these

factors over the last 12 months to gain substantial land positions in

Nigeria's prime lithium pegmatite districts.

A team of experienced geologists is in place, with all necessary equipment

and logistical support such that field programs will be commencing

immediately. Work will start initially with preliminary reconnaissance, and it

is expected that results and additional work can advance quickly.

Details

The Company has signed a JV with Nigerian company Jurassic Mines Ltd

("Jurassic"), whereby Orosur, via a new 100% owned UK subsidiary,

Lithium West Limited ("Lithium West"), may earn up to 70% equity in the

Project in two phases:

1. Phase 1 - Lithium West can earn 51% equity in the Project by

spending a total of US$3m over a maximum of three years.

2. Phase 2 - Lithium West can earn an additional 19% equity in the

project, up to a total of 70%, by spending an additional US$2m over a

maximum of two years.

The Project at inception will comprise four exploration licences across

Nigeria's primary pegmatite belt, covering a total of circa 322km2. Other

prospective areas are currently being examined and it is possible that

additional licences may be added to the Project in the near term.

All licences have been specifically chosen due to their location within the

major lithostructural corridors that are known to control lithium pegmatite

mineralisation in this region.

Geology

Nigeria has long been known to have substantial potential for pegmatite

mineralisation, however historically these pegmatites were largely exploited

at the artisanal level for other metals such as Niobium and Tantalum. As

such, little geoscientific information was publicly available related to any

lithium potential.

However, in early 2018, the Nigerian Ministry of Mines and Steel

Development began to undertake major geoscience mapping projects

across the bulk of Nigeria's crystalline basement rocks to better define the

mineral potential as the key plank in a far-sighted strategy to reduce the

country's dependence on oil. These projects covered a range of

commodities and were referred to as the National Integrated Mineral

Exploration Project (NIMEP). This work indicated that the country indeed

had substantial lithium pegmatite potential, especially in the southern

regions.

Fig 1 Schematic, Nigerian Geology

As a result, Nigeria has, in the last 12 months, seen a sharp increase in

small scale artisanal lithium mining of obvious outcropping pegmatites, with

a corresponding and similarly sharp increase in modern exploration across

the region by international public and private companies.

Orosur began to examine opportunities in Nigeria in mid-2022, focusing on

regional geological assessment and land selection, leading to this current

JV with Jurassic.

Rationale and Experience

The Company has been examining options to enter the lithium space for

some years, based initially on Andean brines and Brazilian

pegmatites. However, it became apparent that these regions had become

extremely competitive, with correspondingly high entry costs, which the

Company felt were not commensurate with the quality of projects on

offer.

Nigeria was then examined because of the extensive in-country experience

of the Company's executive team and because the Country's lithium

pegmatite potential is, to a large extent, a geological mirror image of the

pegmatite fields in northeastern Brazil. The Company commenced the

process of examining entry strategies, based upon a detailed assessment

of geological potential, rather than simply on what was being offered.

Orosur worked closely with its new Nigerian partner, Jurassic, to carry out

regional targeting exercises that ultimately led to these first four licences

being pegged as vacant ground, specifically for this JV, rather than vending

into pre-existing licences.

In addition, the Company has, via its long-standing relationships and

experience, aligned itself with a highly experienced local exploration

consultancy which will provide the Company with access to exploration

teams with associated field logistics, drill rigs, assay equipment and

extensive geological knowledge, thus allowing the Company to operate in

the region without any major upfront investment or addition of substantial

overhead.

Orosur CEO Brad George commented:

"Orosur has been examining entry into the lithium space for several years,

but as with our other projects, we have pursued an early stage, low entry

cost strategy, based upon detailed geological understanding of the local

mineralising systems. Nigeria is clearly on a different continent, but with the

extensive Nigerian experience of myself and our Chairman Louis Castro,

together with our partner's excellent local team, we are entirely confident in

our ability to develop this exciting opportunity in Nigeria in harmony with our

equally exciting South American assets which we will continue to progress

as planned."

For further information, visit www.orosur.ca , follow on twitter @orosurm or contact:

Orosur Mining Inc.

Louis Castro, Chairman,

Brad George, CEO

[email protected]

Tel: +1 (778) 373-0100

SP Angel Corporate Finance LLP - Nomad & Joint Broker

Jeff Keating / Kasia Brzozowska

Tel: +44 (0) 20 3 470 0470

Turner Pope Investments (TPI) Ltd - Joint Broker

Andy Thacker/James Pope

Tel: +44 (0)20 3657 0050

Flagstaff Communications and Investor Communications

Tim Thompson

Mark Edwards

Fergus Mellon

[email protected]

Tel: +44 (0)207 129 1474

The information contained within this announcement is deemed by the Company to constitute inside

information as stipulated under the Market Abuse Regulations (EU) No. 596/2014 ('MAR') which has been

incorporated into UK law by the European Union (Withdrawal) Act 2018. Upon the publication of this

announcement via Regulatory Information Service ('RIS'), this inside information is now considered to be in the

public domain.

Neither TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in policies of the TSX

Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.

About Orosur Mining Inc.

Orosur Mining Inc. (TSX: OMI; AIM: OMI) is a minerals explorer and developer focused on identifying and

advancing projects in Colombia, Argentina, Nigeria and Brazil.

Qualified Persons Statement

The information in this news release was compiled, reviewed and verified by Mr. Brad George, BSc Hons (Geology

and Geophysics), MBA, Member of the Australian Institute of Geoscientists (MAIG), CEO of Orosur Mining Inc.

and a qualified person as defined by National Instrument 43-101.

Forward Looking Statements

All statements, other than statements of historical fact, contained in this news release constitute "forward looking

statements" within the meaning of applicable securities laws, including but not limited to the "safe harbour"

provisions of the Unite d States Private Securities Litigation Reform Act of 1995 and are based on expectations

estimates and projections as of the date of this news release.

Forward-looking statements include, without limitation, the exploration plans in Colombia and the fundi ng from

Monte Águila of those plans, Monte Águila´s decision to continue with the Exploration Agreement, the formation of

a new mining company or mining venture to hold the project, the ability for Loryser to implement the Creditor´s

Agreement successfully in Uruguay and other events or conditions that may occur in the future. The Company's

continuance as a going concern is dependent upon its ability to obtain adequate financing, to reach profitable levels

of operations and to reach a satisfactory implement ation of the Creditor´s Agreement in Uruguay. These material

uncertainties may cast significant doubt upon the Company's ability to realize its assets and discharge its liabilities

in the normal course of business and accordingly the appropriateness of the use of accounting principles applicable

to a going concern. There can be no assurance that such statements will prove to be accurate. Actual results and

future events could differ materially from those anticipated in such forward -looking statements. Such statements

are subject to significant risks and uncertainties including, but not limited, those as described in Section "Risks

Factors" of the MDA and the Annual Information Form. The Company disclaims any intention or obligation to update

or revise any forward-looking statements whether as a result of new information, future events and such forward -

looking statements, except to the extent required by applicable law.