News

Toronto, Ontario, June 27, 2019 - Eastmain Resources Inc. (“Eastmain” or the “Company” - TSX: ER, OTCQX: EANRF) , a gold exploration and development company based in James Bay, Quebec, presents an update on its spring and summer exploration campaign carried out on the Clearwater property, 100% owned by the Company, as well as the results of the last four holes (1,537 m) carried out as part of the winter drilling program on the Percival discovery ( FIGURES 1-6 ).

Claude Lemasson, CEO of Eastmain, declared: “The spring-summer 2019 field exploration campaign is progressing very well and allows us to improve and deepen the knowledge acquired in 2018 which ultimately led to the Percival discovery in November 2018. This fieldwork, combined with the electromagnetic surveys carried out previously, has already enabled us to improve our interpretation of the geology and mineralization along the southern segment of the KS horizon and will ultimately serve to define targets that will be verified by drilling later this summer. "

HIGHLIGHTS OF THE 2019 EXPLORATION CAMPAIGN

  • Exploration program - Winter 2019 (see results below) ( FIGURES 2-4 )
    • A total of 21 holes (6,196 m) have been drilled at Percival to date
    • Three main east-west trending mineralized zones were tracked over a lateral distance of at least 750 m east-west by 250 m wide north-south
  • Field exploration campaign - Spring 2019 ( FIGURES 5, 6 )
    • May - July: Surface geophysical surveys, geological mapping, trenches and sampling over a lateral distance of 5 km along the KS horizon, from the Knight target to the east
    • The results will be used to define drill targets; drilling is expected to start in August

FINAL RESULTS OF THE WINTER 2019 DRILLING PROGRAM

Table 1: Significant intersections (for a table of complete analysis results, click here )

Survey Of AT Length Content Depth  
  (m) (m) (m) (At g / t) vertical (m)  
ER19-845 198.9 203.0 4.1 1.63 142 Silicified Breccia
incl. 200.0 201.0 1.0 5.12
316.0 323.0 7.0 3.15 226 Silicified Breccia and Mudstone Breccia
incl. 319.0 321.0 2.0 8.17
ER19-846 241.1 248.5 7.4 0.52 173 Silicified Breccia
incl. 245.3 246.3 1.0 1.70
262.0 264.0 2.0 1.22 186 Silicified Breccia
ER19-847 220.0 223.0 3.0 0.90 157 Grauwacke
ER19-848 244.2 248.0 3.8 0.80 174 Grauwacke

Table 3: Survey information

Targeted area Survey UTM coordinates
Zone 18
Azimuth Hanging Total length Elevation
    Estant Nordant Degrees Degrees (m) (m)
Percival ER19-845 457,800 5 781 676 360 45 436 328
Percival ER19-846 457,850 5 781 700 360 45 397 326
Percival ER19-847 458,003 5 782 007 360 45 343 331
Percival ER19-848 458,076 5 781 957 360 45 361 327

Field exploration campaign - Horizon KS ( FIGURES 5, 6 )

The field exploration campaign with helicopter support began on May 22 and aims to explore the already identified KS horizon of the Knight showing and passing through the Percival discovery area for a total distance of 5 km eastward, following the general orientation of the Cannard deformation zone. The program includes:

Prospecting and mapping work along north-south oriented lines spaced 50 m apart, with particular attention paid to VTEM and pedogeochemical anomalies identified in the fall of 2018, in search of silicified breccias enriched with pyrrhotite and Percival-type iron formations. The team will take advantage of the thin overburden by using Beep-Mat to measure magnetic susceptibility and electromagnetic conductivity to identify anomalies in the shallow basement so as to prioritize the discovery and exploration of buried targets.

Then, the mechanical excavation of trenches as well as detailed mapping and channel sampling will be carried out on the priority targets identified during prospecting work. The excavator is currently being mobilized to expose the bedrock above several drilling sections at Percival (2018-2019), in particular above the first discovery holes (ER18-822, ER18-823). The trench excavation will progress gradually eastward as the program progresses and according to the results received.

Recent Drill Results ( FIGURES 2-4 )

Holes ER19-845 and ER19-846 were drilled 100 m and 150 m, respectively, east of the discovery holes at Percival. The two holes pass under the mineralization intersected above, thus establishing the continuity at depth of the mineralization on these sections. In fact, hole ER19-845 intersected two silicified breccia intervals (4.1 m at 1.63 g / t Au and 7.0 m at 3.15 g / t Au), both located at approximately 100 m vertical depth under similar breaches identified in hole ER18-837 (1.55 g / t Au over 11.0 m, vertical depth of 125 m, see press release dated March 21, 2019 ).

Hole ER19-846 passed through holes ER19-838 and ER19-839 (2.57 g / t Au over 14.5 m, vertical depth of 60 m, see press release dated May 13, 2019 ). Silicified breccia intervals grading 0.52 g / t Au over 7.4 m at 173 m vertical depth and 0.23 g / t Au over 14.0 m at 213 m vertical depth are interpreted as being continuity, 100 m lower, intervals intersected in holes ER19-838 and ER19-839. This interpretation also suggests a lateral transition from the strongly silicified breccias observed in the discovery holes to slightly less silicified mudstone and argillite breccias.

The two holes ER19-847 and ER19-848 intersected the metasedimentary sequence of the KS horizon, including in particular graphitic argillites, mafic volcaniclastics, argillites and mudstones but with fewer silicified sedimentary breccia intervals. The two holes intersected small intervals with anomalous gold values. These holes were possibly drilled a little too north in the stratigraphy of the KS horizon. Surface exploration programs will elucidate the stratigraphy and establish new drilling targets in this area.

To view the other analysis results presented in Table 2, please click on the following link: ER-190627-Table2-Percival.pdf

To view Figures 1 to 6, please click on the following link: ER-190627-Percival.pdf

For more details on the geology of the Percival discovery and the KS horizon, please see: http://www.eastmain.com/projects/clearwaterexploration/

The scientific and technical content of this news release has been prepared and edited by William McGuinty, P.Geo. and Vice-President Exploration of Eastmain, as a “qualified person” under NI 43 101 regulation.

Quality control and assurance

The design of drilling programs, quality assurance and control, as well as the interpretation of Eastmain Resources results are under the control of Eastmain geological staff, which includes qualified people using a QA program. / Strict QC, compliant with NI 43-101 and industry best practices. The Clearwater project is supervised by Michel Leblanc, P.Geo. project geologist at Eastmain.

The drill core is described, cut and divided into half core samples which are packaged and delivered to the ALS Minerals Inc. laboratory. The samples are dried and then crushed to 70% exceeding a sieve of 2 mm. A 1000 g sub-sample is sprayed at 85% exceeding a 75 micron sieve. The remainder of the ground sample (reject) and the pulverized sample (pulp) are kept for further analysis and quality control. All samples are analyzed by fire assay with an atomic absorption (AA) finish using a 50 g aliquot of the sprayed material. The results obtained above 5 g / t Au are reanalyzed by fire assay with gravimetric finishing. Eastmain regularly inserts reference control samples obtained from third parties and blank samples in the course of samples to monitor assay performance, and sends duplicate samples to a second certified laboratory. As of 2016, approximately 10% of submitted samples have been part of the Company's laboratory sample control protocols.

About Eastmain Resources Inc. (TSX: ER)  www.eastmain.com

Eastmain is a Canadian exploration company advancing three high-grade gold assets in the new James Bay gold camp in Quebec. The company owns a 100% interest in the Eau Claire project, for which it recently published a preliminary economic assessment (“PEA”), and in the Eastmain mine project, for which it has prepared a mineral resource estimate in accordance with the NI 43-101 in 2018. Eastmain also manages the Éléonore Sud joint venture, located immediately south of Goldcorp Inc.'s Éléonore mine, where a new high-grade gold discovery was made at the end of 2017. In addition, the company has '' a portfolio of exploration projects in this favorable mining jurisdiction, with nearby infrastructure.

For more information:

Claude Lemasson, Chairman and CEO

+1 647-347-3765

lemasson@eastmain.com

Alison Dwoskin, Director, Investor Relations

+1 647-347-3735

dwoskin@eastmain.com

The text of the press release resulting from a translation should in no way be considered official. The only authentic version of the press release is that of the press release in its original language. The translation must always be compared to the source text, which will set a precedent.

Forward-looking statements- Certain information presented in this press release may contain forward-looking statements involving significant known and unknown risks and uncertainties. All forward-looking statements are not purely historical and include beliefs, plans, expectations or a timeline of future plans. They include, but are not limited to, statements relating to the potential success of the Company's future exploration and development strategies. These forward-looking statements are subject to numerous risks and uncertainties, some of which are beyond the control of Eastmain, in particular, without being limited to, the impact of general economic conditions, the situation of the sector, dependence on '' with regard to regulatory approvals, title challenges and changes to project parameters as long as plans continue to be refined. Readers are cautioned that the assumptions used in the preparation of this information, although considered reasonable at the time of preparation, may prove to be imprecise and that, therefore, one should not place undue reliance on forward-looking statements. The company assumes no obligation to update this information, except as required by law. forward-looking statements should not be relied on unduly. The company assumes no obligation to update this information, except as required by law. forward-looking statements should not be relied on unduly. The company assumes no obligation to update this information, except as required by law.

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