Toronto, Ontario, August 13, 2019 - Eastmain Resources Inc. (“Eastmain” or the “Company” - TSX: ER, OTCQX: EANRF) , a gold exploration and development company operating in the Eeyou Istchee region Baie-James in Quebec is pleased to announce the results of its summer 2019 surface exploration campaign on the Clearwater property, 100% owned by the Company ( FIGURES 1-8 ). Based on the results obtained, a drilling program of up to 20 holes (4000m) is underway along the Knight-Serendipity horizon (the “KS horizon”), including the Percival discovery and the Newly identified Caradoc target located 1.7 km east of the Percival showing. The analysis results are expected during the month of September.
The field exploration campaign covering the entire 14 km of lateral extent along the KS horizon, starting at the Knight showing, passing through the Percival discovery and continuing for 5 km east along the southern flank of the KS horizon and then north to the Serendipity target has identified several new targets. The campaign involved high-density surface prospecting with targeting of VTEM conductors, geological mapping, trenching and channel sampling. The analysis results of the prospecting of the northern branch of the KS horizon (Serendipity) remain to come.
Claude Lemasson, CEO of Eastmain, said: “The summer program gave us a better understanding of the complex geology at the Percival showing and gave us excellent new targets on the KS horizon, located in the southeastern portion of the Clearwater property. Our team has already started drilling some of the promising new targets identified on a lateral extension of 3.5 km east of Percival, notably on the new Caradoc target, located 1.3 km east of the hole on further east on Percival. "
HIGHLIGHTS OF THE 2019 EXPLORATION CAMPAIGN
- Results of trenches and channel sampling at Percival - Strong gold mineralization has been identified over a strike length of 50 m on stripping centered over discovery holes ( FIGURE 2 , 2a ). Detailed mapping and channel sampling have established the uniformity and continuity of gold grades and silicified breccias intercepted in the holes. The best results in channels returned: 3.69 g / t Au over 14 m, 3.33 g / t Au over 18 m, 1.96 g / t Au over 28 m and 2.07 g / t Au over 11 mr. The best results of the grooved samples are shown in Table 1 below.
- Caradoc target - New showing located 1.7 km east of the Percival discovery holes (822 and 823), where a first selected sample assayed 10.3 g / t Au ( FIGURE 3 ) . The excavation of trenches is in progress in this sector and monitoring by drilling should begin in Caradoc during the month.
- Other targets along the KS horizon - A new interpretation of the 2018 VTEM / Mag helicopter survey results identified 21 priority targets of which 8 are located on a 5 km stretch along the southern flank of the KS horizon , which notably includes Percival and Caradoc (numbered targets in FIGURES 7 & 8 ).
- Improved geological modeling - Mapping of trenches exposed in 2019 and prospecting work in the summer exposed a strongly folded sequence of regional scope, composed of silt and mafic mudstones interspersed with banded iron formations. Gold mineralization is preferentially hosted in zones of intraformational synsedimentary breccias within these units.
|Table 1: Best channel sampling results at Percival|
|Groove||Sampled interval||Composite interval||Including|
|AT||A1||A4||0.26 g / t Au over 4 m|
|D||D2||D7||0.94 g / t Au over 6 m|
|E||E5||E12||1.68 g / t Au over 8 m||2.98 g / t Au over 4 m|
|F||F9||F19||2.07 g / t Au over 11 m||4.55 g / t Au over 2 m|
|G||G5||G22||3.33 g / t Au over 18 m||6.30 g / t Au over 4 m
and 4.40 g / t Au over 5 m
|G_a||G8||G21||3.69 g / t Au over 14 m||6.33 g / t Au over 6 m
and 27.3 g / t Au over 1.0 m
|H||H3||H21||1.71 g / t Au over 19 m||4.25 g / t Au over 3 m|
|I||I4||I15||1.70 g / t Au over 12 m||2.79 g / t Au over 5 m|
|J||D9||D14||1.73 g / t Au over 6 m|
|K||K1||K9||1.29 g / t Au over 9 m|
|M||M1||M5||1.76 g / t Au over 5 m|
|NOT||N1||N2||3.43 g / t Au over 2 m|
|O||O1||O3||4.45 g / t Au over 3 m|
|P||P1||P28||1.96 g / t Au over 28 m||3.75 g / t Au over 6 m|
|Q||Q3||Q5||1.42 g / t Au over 3 m|
Note: Channel samples are planned to intersect the predominant orientation of the mineralization perpendicularly and are cut horizontally using a diamond groove saw. At Percival, the grooves intersect a subvertical foliation.
Trenching and channel sampling work ( FIGURE 2 , 2a ) on the Percival discovery was completed in June and exposed the bedrock above discovery holes ER18-822 and ER18- 823. Detailed mapping has identified strong gold mineralization over a length of 50 m on the outcrop.
The exposed surface outcrops confirmed several geological observations made from discovery holes ER18-822 and ER18-823, in particular the link between gold mineralization and sedimentary breccias throughout the Percival sector. Although the breccias were initially identified in drilling as weak to very strongly silicified siltite and mudstone units, outcrops established that the main breccia at Percival also includes a silicified banded iron formation (FFR) sequence. and altered as well as FFR clast collapse breccias, where magnetite appears to have been replaced by pyrrhotite. Large, unaltered FFR fragments as well as smaller boulders were mapped on the newly exposed surfaces but were not initially drilled at this location. Thin bands of garnet amphibolites are locally interspersed within the iron formation sequence. These FFR units are interbedded with strongly silicified and sericitized shales (altered argillites). The intense weathering is accompanied by sulphide mineralization (1 to 10% pyrrhotite + pyrite) which seems to replace magnetite in the FFRs. There is also a second generation of sulphides associated with a later phase. These FFR units are interbedded with strongly silicified and sericitized shales (altered argillites). The intense weathering is accompanied by sulphide mineralization (1 to 10% pyrrhotite + pyrite) which seems to replace magnetite in the FFRs. There is also a second generation of sulphides associated with a later phase. These FFR units are interbedded with strongly silicified and sericitized shales (altered argillites). The intense weathering is accompanied by sulphide mineralization (1 to 10% pyrrhotite + pyrite) which seems to replace magnetite in the FFRs. There is also a second generation of sulphides associated with a later phase.
The FFRs and strongly altered schists are located within a folded stratigraphic sequence, with mudstones and mafic siltstones, which also contain horizons of sedimentary breccias that can be weakly to moderately silicified, mineralized in pyrrhotite and carrying anomalous values. Golden. The folds observed in outcrop sedimentary units appear to have an axial plane oriented NE and a steep plunge. However at least two phases of deformation have been identified which affect the rocks hosting the mineralization.
High density prospecting and geological mapping were carried out from May 22 to July 23, along lines systematically spaced 50 m apart along the KS horizon. This work targeted the soil geochemistry and VTEM anomalies identified in the fall of 2018, with a view to locating pyrrhotite-rich breccias and Percival-type silicified breccia units. The thin overburden helped successfully use the Beep Mat TM, which measure magnetic susceptibility and electromagnetic conductivity in order to detect the presence of sulphide mineralization in the bedrock under a thin layer of overburden and thus prioritize the excavation and exploration of shallow buried targets. A total of 1,342 grab samples were collected during the high density prospecting campaign.
Figures 3, 4, 5 and 6 show the distribution of rock samples and analytical results for gold and arsenic (a trace element associated with gold in the region) obtained so far along of the southern branch of the KS horizon. A significant gold anomaly, grading 10.3 g / t Au, was obtained from a grab sample of garnet-anthophyllite / grunérite shale located approximately 1.6 km east of Percival. The sample comes from a sequence with iron formations and brecciated iron formations in contact with mudstones. The area surrounding the sample was designated as the Caradoc target. Trench excavation and channel sampling work was carried out; results are expected shortly.
The distribution of gold is sporadic in rock samples collected during prospecting work along the southern flank of the KS horizon ( FIGURES 3 & 5 ) , with anomalous values ranging from 300 ppb to 1 g / t Au detected in the eastern lateral extension of the Knight / Percival sector over a distance of 2 km. A second area where weak gold mineralization has been detected is at the eastern end of the south branch of the KS horizon, approximately 3.5 km east of Percival.
The arsenic values of the grab samples along the southern branch of the KS horizon ( FIGURES 4 & 6 ) show several important strong anomalies covering a large area, including a 2 km × 1 km zone centered on the Percival discovery and a another 1 km × 500 m zone associated with the Caradoc target. Two other anomalous sectors of 500 m × 500 m are located between 1 and 2 km east of Caradoc.
The gold and arsenic anomalies coincide with structural disturbances of the KS volcano-sedimentary horizon, identified from the discontinuities of the magnetic axes and VTEM conductors.
Mechanical excavation of trenches and channel sampling were carried out following the surface trace in several holes and on priority targets identified during the prospecting and mapping program along the southern flank of the KS horizon. In June and July, 1,844 linear meters of trenches were excavated and 2,324 channel and grab samples were taken. Analytical results have been received for the Percival sector. Results from trenches in other areas are yet to come.
A modeling of the data from the VTEM ™ Plus airborne geophysical survey (versatile electromagnetic time domain and horizontal magnetic gradiometer) acquired towards the end of 2018 was prepared by Condor North Consulting ULC in 2019, in support of the exploration campaign targeting the KS horizon ( FIGURES 7 & 8 ). The recently filed report identifies 21 targets in the 550 line kilometer area covered by the survey and confirms anomalous signatures of several known showings such as Percival, Serendipity and areas adjacent to the Caradoc target. The targets identified in the report will be used to plan future trenching and mapping work, particularly along the northern flank of the KS horizon.
To view Figures 1 to 8, please click on the following link: http://www.eastmain.com/_resources/news/Images/ER-190813-Percival.pdf
This press release has been compiled and reviewed by William McGuinty, P.Geo., Vice President of Exploration of Eastmain, and Carl Corriveau, P.Geo., Director of Exploration of Eastmain, each a Qualified Person under the NI 43-101 Regulation.
Quality assurance and quality control (QA / QC)
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 persons using a program of Strict QA / QC, compliant with NI 43-101 and industry best practices. The Clearwater project is supervised by Michel Leblanc, P.Geo., Project geologist at Eastmain.
During the high density prospecting campaign, field samples were collected, packaged and delivered to the Expert Laboratory in Rouyn-Noranda, Quebec. The channel samples taken from the trenches and the drill core samples were described, cut and divided into samples which were packaged and delivered to the ALS Minerals laboratory in Val-d'Or (half cores for the samples of drilling). The samples were dried and then crushed to 70% passing a 2 mm sieve. A 1000g sub-sample was sprayed at 85% passing a 75 micron sieve. The remains of the ground sample (reject) and the pulverized sample (pulp) were kept for further analysis and quality control. All samples were analyzed by fire assay with a finish of atomic absorption (AA) using an aliquot of 50 g of the pulverized material (30 g for samples analyzed at Laboratoire Expert). The results obtained above 5 g / t Au were reanalyzed by fire assay with gravimetric finishing. Eastmain regularly inserts reference control samples obtained from third parties and blanks into the sample stream to monitor assay performance, and sends duplicate samples to a second certified laboratory. Approximately 10% of the samples submitted are part of the Company's laboratory sample control protocols. The results obtained above 5 g / t Au were reanalyzed by fire assay with gravimetric finishing. Eastmain regularly inserts reference control samples obtained from third parties and blanks into the sample stream to monitor assay performance, and sends duplicate samples to a second certified laboratory. Approximately 10% of the samples submitted are part of the Company's laboratory sample control protocols. The results obtained above 5 g / t Au were reanalyzed by fire assay with gravimetric finishing. Eastmain regularly inserts reference control samples obtained from third parties and blank samples into the sample stream to monitor assay performance, and sends duplicate samples to a second certified laboratory. Approximately 10% of the samples submitted are 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 Clearwater property, which includes the Eau Claire project, for which it recently published a preliminary economic assessment (“PIA”) in May 2018, as well as the Percival discovery made in November 2018. Eastmain manages also the Éléonore Sud joint venture, located immediately south of Goldcorp Inc.'s Éléonore mine, where the Moni / Contact corridor discovered in 2017 is located. In addition, the Company holds a 100% interest in the Eastmain mine project, currently under option by a third party, and has a portfolio of exploration projects 100% owned in this favorable mining jurisdiction,
For more information :
Claude Lemasson, President and CEO
Alison Dwoskin, Director of Investor Relations
Forward-looking statements -Certain information presented in this press release may contain forward-looking statements involving important 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, including, without however being limited to, the impact of general economic conditions, the situation of the sector, dependence to the challenges to title deeds 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 to the extent required by law. may prove to be imprecise and therefore care should be taken not to place undue reliance on forward-looking statements. The Company assumes no obligation to update this information, except to the extent required by law. may prove to be imprecise and therefore care should be taken not to place undue reliance on forward-looking statements. The Company assumes no obligation to update this information, except to the extent required by law.