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OMI.V ·

Orosur Mining Inc: Q2 Operations Update

Mine Development & Operations

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Orosur Mining Inc: Q2 Operations Update

Montevideo, Uruguay, November 22, 2017. Orosur Mining Inc. (“Orosur” or “the Company” ) (TSX /AIM:

OMI) a South American-focused gold producer, developer and explorer announces a second quarter (“Q2”)

operations update on production from its San Gregorio mine complex in Uruguay.

The Company expects a deferral of approximately 2,000 ounces from Q2 production at the San Gregorio

mine complex due to the extended downtime of two long hole drill rigs used in stope production at the San

Gregorio Underground West mine (“SGW UG”). Work is well underway to repair the machinery and it is

anticipated that the affected drill rigs will return to full productivity by the end of November and the Company

has already resumed underground production. During Q2, development continued as planned at SGW UG

and mill feed is being partially supplemented by open pit ore and low grade stockpiles causing lower head

grades than planned.

Orosur will provide a detailed update on Q2 production in the Quarterly Results Report.

About Orosur Mining Inc.

Orosur Mining Inc. (TSX: OMI ; AIM: OMI) is a fully integrated gold producer , developer and explor er

focused on identifying and advancing gold projects in South America. The Company operates the only

producing gold mine in Uruguay (San Gregorio), and has assembled an exploration portfolio of high quality

assets in Uruguay, Chile and Colombia.

For further information, please contact:

Orosur Mining Inc

Ignacio Salazar, Chief Executive Officer

[email protected]

Tel: +1 (778) 373-0100

Cantor Fitzgerald Europe – Nomad & Joint Broker

David Porter/Keith Dowsing

Tel: +44 (0) 20 7894 7000

Numis Securities Limited – Joint Broker

John Prior / James Black / Paul Gillam

Tel: +44 (0) 20 7260 1000

FTI Consulting

Ben Brewerton / Sara Powell / Emerson Clarke

Tel: +44 (0) 20 3727 1000

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

information as stipulated under the Market Abuse Regulation ("MAR"). Upon the publication of this

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

public domain. If you have any queries on this, then please contact Ignacio Salazar, Chief Executive Officer

of the Company (responsible for arranging release of this announcement) on: +1 (778) 373 -0100.

Forward Looking Statements

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All statements, other than statements of historical fact, contained or incorporated by reference in this news

release, including any information as to the future financial or operating performance of the Company,

constitute "forward-looking statements" wit hin the meaning of certain securities laws, including the "safe

harbour" provisions of the Securities Act (Ontario) and the United States Private Securities Litigation

Reform Act of 1995 and are based on expectations estimates and projections as of the dat e of this news

release. There can be no assurance that such statements will prove to be accurate. Such statements are

subject to significant risks and uncertainties, and actual results and future events could differ materially

from those anticipated in such statements. Forward-looking statements include, without limitation success

of exploration activities; permitting time lines; the failure of plant; equipment or processes to operate as

anticipated; accidents; labour disputes; requirements for additional c apital title disputes or claims and

limitations on insurance coverage. 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.