EDITOR: | April 14th, 2014

Osisko Intersects 1.53 g/t Gold Over 87 Metres at Upper Beaver

| April 14, 2014 | No Comments
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April 14, 2014 (Source: Marketwired) — Osisko Mining Corporation (“Osisko” or the “Corporation”) (TSX:OSK)(FRANKFURT:EWX) is pleased to announce new drilling results from the Upper Beaver deposit, located on its 100% owned Kirkland Lake project. Work in 2014 has focused on deepening of the East Porphyry Zone (full drill results pending) and reinterpreting the near-surface portion of the deposit (at depths of less than 300 metres) in order to evaluate its open pit potential. Recent shallow drilling (12 holes) has highlighted the presence of significant near-surface, low-grade mineralization with such intersections as 59.0 metres grading 1.64 g/t Au and 0.20 % Cu (DDH UB14-329), 78.0 metres grading 1.43 g/t Au and 0.06 % Cu (DDH UB14-330) and 87 metres grading 1.53 g/t Au and 0.04 % Cu (DDH UB14-333). The table below summarized the results from the winter 2014 shallow drilling program (excluding UB14-338 that did not return significant values):

Hole No. From (m) To (m) Length (m) Au g/t Cu%
UB14-329 20.0 79.0 59.0 1.64 0.20
And 123.0 163.0 40.0 1.65 0.19
Andincluding 175.0 200.0 25.0 1.66 0.05
UB14-330 231.0 243.0 12.0 0.78 0.05
Andincluding 266.0 344.0 78.0 1.43 0.06
UB14-331 77.0 93.0 16.0 1.40 0.04
And 108.0 157.0 49.0 1.43 0.14
And 199.0 231.0 32.0 1.72 0.09
And 238.0 247.0 9.0 3.90 0.07
UB14-332 69.0 84.0 15.0 2.12 0.03
And 106.0 113.0 7.0 3.28 0.15
UB14-333 139.0 150.0 11.0 1.89 0.00
And 214.0 301.0 87.0 1.53 0.04
UB14-334 135.0 149.0 14.0 5.01 0.01
And 188.0 203.0 15.0 0.88 0.04
UB14-335 147.0 160.0 13.0 1.31 0.20
And 230.0 249.0 19.0 2.26 0.18
UB14-336 181.0 189.0 8.0 0.64 0.00
UB14-337 133.0 141.0 8.0 2.03 0.07
And 188.0 209.0 21.0 1.65 0.06
UB14-339 276.0 286.0 10.0 0.64 0.14
UB14-340 28.0 43.0 15.0 3.15 0.02
And 243.0 252.0 .0 9.0 1.58 0.09

In addition, results from the 2012 drilling in the vicinity of the old mine workings were recalculated using a 0.35 g/t Au lower cut-off, yielding the following intersections:

Hole No. From (m) To (m) Length (m) Au g/t Cu %
UB12-205 94.0 112.0 18.0 1.24 0.47
And 124.0 163.0 39.0 1.83 0.29
UB12-206 85.0 102.0 17.0 0.57 0.16
And 187.0 198.0 11.0 1.07 0.11
UB12-209 123.0 157.0 34.0 1.79 0.33
UB12-213 71.0 104.0 33.0 0.72 0.08
UB12-215 10.0 17.0 7.0 1.95 0.13
And 140.0 148.0 8.0 1.11 0.21
And 188.0 199.0 11.0 1.44 0.24
UB12-216 78.0 116.3 38.3 2.24
4
0.25
UB12-217 33.8 46.0 12.2 1.50 0.22
And 72.0 101.0 29.0 0.95 0.31
And 117.0 165.0 48.0 0.81 0.31
UB12-218A 88.0 137.0 49.0 0.99 0.13
And 169.0 193.0 24.0 1.09 0.05
UB12-219 139.0 163.0 24.0 0.66 0.11
And 208.0 221.0 13.0 0.95 0.12
UB12-220 191.0 265.0 74.0 1.60 0.20
UB12-221 24.0 46.0 22.0 1.03 0.39
And 79.0 165.0 86.0 1.10 0.15
UB12-223 47.0 54.0 7.0 1.14 0.47
And 75.0 85.0 10.0 1.20 0.69
UB12-226 112.0 121.0 9.0 1.27 0.04
And 226.0 233.0 7.0 2.45 0.00
UB12-240 17.0 25.0 8.0 1.30 0.01
UB12-243 28.0 44.0 16.0 2.90 0.00
UB12-245 18.0 28.0 10.0 0.96 0.01
And 89.0 102.0 13.0 1.25 0.37

The new data as well as recalculated data from previous drilling indicates the presence of significant low grade stockwork mineralization surrounding known gold-copper veins of the Upper Beaver deposit. This near-surface mineralization warrants further evaluation and a 50 metre x 50 metre grid definition program will be initiated immediately to further evaluate this potential gold-copper resource that could be added to existing underground resources (see Queenston press release dated September 26, 2012 as well 43-101 resource disclosures filed on SEDAR and on Osisko web site).

All NQ core assays reported above were obtained by standard 50 g fire assaying-AA finish or gravimetric finish at ALS Minerals laboratories in Val d’Or, Quebec, an ISO/IEC guideline 17025-accredited facility. Reported drill core weighted averages were calculated using a minimum of 0.35 g/t Au over successive sample intervals with maximum internal dilution length of 10 metres. All assays were capped at 10 g/t Au. Lost core intervals, constituting less than 0.5% of reported intervals within mineralized intersections, were all less than one metre long and incorporated as the average grade of adjacent intervals above and below in all length-weighted calculations. Osisko follows strict QA-QC protocol measures in keeping with industry standards and regulatory reporting requirements. Mr. Robert Wares, D.Sc., P. Geo., Senior Vice President Exploration and Resource Development for Osisko, is the Qualified Person who has reviewed this news release and is responsible for the technical information reported herein, including verification of the data disclosed.

Reminder to take no action – Goldcorp Offer

On April 10, 2014, Osisko noted the announcement by Goldcorp Inc. (“Goldcorp”) that it intends to amend its hostile offer to acquire all of the outstanding common shares of Osisko (the “Offer”) to, among other things, extend the expiry date, increase the consideration payable and reduce the minimum tender condition.

The Board of Directors of Osisko is considering this announcement. Until the Corporation completes its review, it will not comment further or speculate as to any future course of action it might take.

Shareholders are reminded that the Corporation recommends that shareholders defer taking any action in respect of the hostile Offer until the Board of Directors of the Corporation makes a recommendation as to the merits of the hostile Offer.

Shareholders who have questions or who may have already tendered their shares to the Goldcorp Offer and wish to withdraw them, may do so by contacting our Information Agent, Laurel Hill Advisory Group at:

North American Toll Free: 1-877-452-7184

Banks, Brokers or collect calls: 416-304-2011

Email: assistance@laurelhill.com

About Osisko Mining Corporation

Osisko Mining Corporation operates the Canadian Malartic Gold Mine in Malartic, Québec and is pursuing exploration on a number of properties, notably in Québec, Ontario and Mexico.

Cautionary Notes Concerning Estimates of Mineral Resources

This news release uses such terms as measured, indicated and inferred resources as a relative measure of the level of confidence in the resource estimate. Readers are cautioned that mineral resources are not economic mineral reserves and that the economic viability of resources that are not mineral reserves has not been demonstrated. In addition, inferred resources are considered too geologically speculative to have any economic considerations applied to them. Under Canadian rules, estimates of inferred mineral resources may not be used in the determination of feasibility or pre-feasibility studies or economic studies except for a Preliminary Assessment as defined under NI 43-101. It cannot be assumed that all or any part of an inferred mineral resource will ever be upgraded to a higher category. Readers are cautioned not to assume that further work to improve mineral resources will lead to determination of mineral reserves that can be mined economically.

Forward-Looking Statements

Certain statements contained in this press release may be deemed “forward-looking statements”. All statements in this release, other than statements of historical fact, that address events or developments that the Corporation expects to occur, are forward looking statements. Forward looking statements are statements that are not historical facts and are generally, but not always, identified by the words “expects”, “plans”, “anticipates”, “believes”, “intends”, “estimates”, “projects”, “potential”, “scheduled” and similar expressions, or that events or conditions “will”, “would”, “may”, “could” or “should” occur including, without limitation, the existence of potentially large, bulk tonnage disseminated gold zone on the Upper Beaver property, the continuation and success of further exploration activities or the development of projects, and whether or not any alternative transaction superior to Goldcorp’s hostile bid may emerge. Although the Corporation believes the expectations expressed in such forward-looking statements are based on reasonable assumptions, such statements are not guarantees of future performance and actual results may differ materially from those in forward looking statements. Factors that could cause the actual results to differ materially from those in forward-looking statements include gold prices, results of exploration and development activities, the Corporation’s limited experience with production and development stage mining operations, uninsured risks, regulatory changes or sanctions, defects in titles, availability of personnel, materials and equipment, timeliness of government approvals, actual performance of facilities, equipment and processes relative to specifications and expectations, unanticipated environmental impacts on operations market prices, continued availability of capital and financing and general economic, market or business conditions. These factors are discussed in greater detail in the Corporation’s most recent Annual Information Form filed on SEDAR, which also provides additional general assumptions in connection with these statements. The Corporation cautions that the foregoing list of important factors is not exhaustive. Investors and others who base themselves on the Corporation’s forward-looking statements should carefully consider the above factors as well as the uncertainties they represent and the risk they entail. The Corporation believes that the expectations reflected in those forward-looking statements are reasonable, but no assurance can be given that these expectations will prove to be correct and such forward-looking statements included in this press release should not be unduly relied upon. These statements speak only as of the date of this press release.


Raj Shah

Editor:

Raj Shah has professional experience working for over a half a dozen years at financial firms such as Merrill Lynch and First Allied Securities Inc., ... <Read more about Raj Shah>


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