News

Toronto, Ontario, March 21, 2019 - Eastmain Resources Inc. (“Eastmain” or the “Company” - TSX: ER, OTCQX: EANRF ) is pleased to announce the results of four holes (907 meters (“m”) ) drilled as part of the 2019 winter program totaling 5,500 m spread over 20 holes and targeting the Percival discovery area (“Percival”) on the Clearwater property, wholly owned by the Company and located in the region of James Bay in Quebec (see FIGURES 1-6 ). Drilling is continuing and the results of 6 holes (1,579 m) have been reported so far.

Highlights:

  • ER19-836: 0.97 grams per tonne of gold ("g / t Au") over 74.5 m (vertical depth of 58 m), including 1.38 g / t Au over 24.0 m (silicified breccia and mudstone) and 1.38 g / t Au over 25.0 m.
    • Hole ER19-836 was drilled 56 m north of hole ER19-833 and targeted the eastern extension of the Percival discovery as well as a MaxMin-type horizontal loop electromagnetic anomaly (HLEM) (see FIGURE 4 ).
  • ER19-837: 1.55 g / t Au over 11.0 m (vertical depth of 125 m), including 3.20 g / t Au over 5.0 m (mudstone and brecciated mudstone).
    • Hole ER19-837 is offset 50 m east of hole ER19-836 and targeted the continuity of the large HLEM anomaly associated with the projected extension east of Percival (see FIGURE 5 ).

Claude Lemasson, CEO of Eastmain, said: “Percival is now tracked for at least 400m in length and we are extremely encouraged by the correlations observed between gold mineralization and electromagnetic anomalies in this area. The team continues to increase the lateral extent successfully using ground and helicopter geophysical surveys to guide the borehole verifications along the SW-NE aspect of the Percival Zone. "

Table 1: Significant intersections

Site Survey Of AT Length Content Depth Lithology
    (m) (m) (m) (At g / t) vertical (m) cashing
Percival ER19-836 45.00 119.50 74.50 0.97 58 Silicified breccia with mudstone and interlits rich in magnetite
incl. 46.00 70.00 24.00 1.39 41
including 46.00 56.50 10.50 2.02
incl. 94.50 119.50 25.00 1.38 76
including 106.50 108.30 1.80 6.49
Percival ER19-837 57.70 61.60 3.90 2.47 42 Silicified breccia and silicified mudstone
143.50 145.00 1.50 3.00 102 Mudstone
172.00 183.00 11.00 1.55 125 Mudstone and silicified mudstone
incl. 178.00 183.00 5.00 3.20
Percival sector ER19-834       No significant value    
Percival sector ER19-835 144.00 145.00 1.00 2.42 102 Mudstone weakly silicified
  • The intervals are presented in lengths along the drill axis; holes are generally planned so as to intersect mineralization as close to perpendicular as possible; the actual thickness is estimated to be 75% of the length along the drill axis when the orientation and dip of the hole and the mineralized horizon are taken into account.
  • Analysis results were not cut. Intersections are confined within the geological boundaries of large areas but have not been correlated to individual structures or horizons yet.
  • Vertical depth is measured from the surface to the midpoint of the interval.

Drilling results

Hole ER19-836 was drilled 55 m to the north of and above hole ER19-833 in order to follow up on the results obtained in this last hole (1.84 g / t Au over 22.2 m in a breach silicified) and for further evaluation of a strong MaxMin-type HLEM conductor, in the eastward lateral extension of the Percival discovery holes (see FIGURES 2-4 ) . This hole intersected gold mineralization near the surface, in a silicified and mineralized breccia with mudstone and magnetite-rich interlits 45 m to 120 m deep in the drill axis (including 0.97 g / t Au over 74.5 m), which marks the continuity near the surface of the mineralization intersected in hole ER19-833 (see press release of February 25, 2019). Hole ER19-836 also marks the appearance of stratigraphic units rich in magnetite and chert-magnetite, interpreted as being the first intersections of iron formations observed during the drilling campaign at Percival.

Hole ER19-837 was drilled 50 m east of the drilling section including holes ER19-833 and ER190-836 (see FIGURES 2, 3 and 5 ) in the NE continuity of the same HLEM anomaly. Gold mineralization in this hole is still associated with intersections of silicified breccia and breccia in mudstones and returned grades of 2.47 g / t Au over 3.9 m from 57.7 m and 1 , 55 g / t Au over 11.0 m from 172.0 m depth along the borehole. This hole also intersected intervals of chert-magnetite and iron formations rich in magnetite, indicating that this sequence continues northeast of hole ER19-836.

Holes ER19-834 and ER19-835 were drilled 290 m and 235 m, respectively, south of discovery holes ER18-822 and ER18-823 at Percival. These soundings verified a section trending north-south through a HLEM anomaly parallel to the Percival horizon and located 250 m further south (see FIGURES 2, 3 and 6). Hole ER19-835 ended in a weakly silicified and mineralized mudstone. The mineralized zone remains open at depth and the hole will be extended to investigate the intersection grading 2.42 g / t Au over 1 m obtained at the end of the hole. Other than this intersection, no significant mineralization was obtained and the Company believes that the HLEM anomaly in this area could have been caused by the graphitic units encountered in these holes. A new hole, located north of hole ER19-835 and south of hole ER19-824, is currently planned to complete the geological section south of the discovery zone.

Table 2: Drilling information

Zoned Survey UTM coordinates
Zone 18
Azimuth Hanging Total length Elevation
  No. Estant Nordant Degrees Degrees (m) (m)
Percival ER19-834 457650 5781470 360 -45 127 310
Percival ER19-835 457650 5781525 360 -45 145 320
Percival ER19-836 457752 5781831 360 -45 214 316
Percival ER19-837 457800 5781800 360 -45 421 333

For more information on the geology of the Percival Discovery and the KS horizon, please visit: http://www.eastmain.com/projects/clearwaterexploration/ .

To view Figures 1-6, please click on the link:  ER-190225-Percival.pdf .

The scientific and technical content of this news release has been prepared and reviewed 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 rest of the crushed 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 has 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 to the 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 will always have to 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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