Toronto, Ontario, September 10, 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, announces the analysis results of channel sampling work and the latest results of high-density prospecting samples taken as part of its exploration campaign this summer on the Clearwater property, held at 100 % by Company ( FIGURES 1-6) (see the press release dated August 13, 2019 for the first results of the campaign). A drilling program totaling 4000 m spanning 20 holes is now underway in the Percival and Caradoc sectors and in the new zones of interest; 13 holes (2,800 m) have already been completed and assay results are expected shortly.
The latest results from the summer campaign include analysis results for channel samples and grab samples taken from 12 of the 14 trenches ( FIGURE 2 ) performed . Sampling targeted a 2.5 km segment along the southern branch of the Knight-Serendipity volcano-sedimentary horizon ("the KS horizon") from the Knight showing to the Caradoc showing passing by the Percival discovery. The full program includes high density surface prospecting and rock sampling, confirmation of VTEM conductors, geological mapping, over the entire KS horizon.
Claude Lemasson, CEO of Eastmain, said: “These results confirm our decision to focus our exploration efforts east of the Eau Claire project, on the KS horizon. As Eau Claire progresses through pre-development and permitting, our exploration team discovers banded iron formations and breccias associated with gold mineralization within 14 km to the east. This is an unexpected opportunity for our team to potentially make several gold discoveries related to the KS horizon. "
HIGHLIGHTS OF THE 2019 EXPLORATION CAMPAIGN
- Trenches at Caradoc and along the KS horizon - Gold values up to 1.23 g / t Au over 27.2 m were obtained in a stratigraphic sequence associated with iron formations. Large silicified and mineralized breccias have been exposed, adding to the potential of a gold system associated with iron formation ( FIGURES 3 and 4 ).
- High-density surface prospecting along the northern branch of the KS horizon - Sampling results along the northern branch of the volcano-sedimentary belt yielded anomalous geochemical values for arsenic (As) in samples from rocks that coincide with previously targeted VTEM-type geophysical anomalies ( FIGURES 5 and 6 ) . Further follow-up field work will be carried out before continuing with the excavation of trenches and the selection of drill targets.
Table 1: Best channel sampling results along the KS horizon
|Trench||Groove||Sampled interval||Composite interval||Including|
|Of||AT||Au (g / t)||Length (m)|
|06J||D13||D21||1.05||8.75||6.36 g / t Au over 0.93 m|
|06R||R19||R46||1.23||27.2||2.78 g / t Au over 2.99 m, 4.64 g / t Au over 1.0 m, 3.42 g / t Au over 2.0 m|
|13P||P21||P25||0.63||4.79||1.84 g / t Au over 0.97 m|
|13P||P29||P32||0.56||3.83||1.34 g / t Au over 0.85 m|
* Work to enlarge the trench and take additional samples is underway
Selected samples were taken during the positioning of future trenches in order to quickly assess the gold grade and the mineralized material which could not be channeled due to terrain constraints.
Table 2: Best results of grab samples taken from the KS horizon trenches *
|Trench||Gold values||Receiving lithologies|
|CW-TR19-02||4.68 g / t Au, 1.66 g / t Au||Graphitic siltite|
|CW-TR19-03||0.49 g / t Au, 2.19 g / t Au||Silicified breccia, siltstone|
|CW-TR19-04||No value greater than 0.25 g / t Au|
|CW-TR19-05||Anomalous values in 12 samples, averaging 150 ppb Au||Graphitic siltite|
|CW-TR19-06||5.01 g / t Au, 3.34 g / t Au, 0.55 g / t Au,
0.80 g / t Au, 0.65 g / t Au
|Silicified and brecciated siltite, chert, silicified breccia|
|CW-TR19-07||No value greater than 0.25 g / t Au|
|CW-TR19-08||No value greater than 0.25 g / t Au|
|CW-TR19-09||1.59 g / t Au||Rhyolitic tuff|
|CW-TR19-10||No value greater than 0.25 g / t Au|
|CW-TR19-12||No value greater than 0.25 g / t Au|
|CW-TR19-13||5.31 g / t Au||Rhyolitic tuff with quartz veins|
|* CW-TR19-11 - no grab sample was taken; CW-TR19-14 - results to come|
Trench excavation and channel sampling
Trenching and channel sampling ( FIGURES 3 and 4 ) exposed bedrock at various locations along the KS horizon over a lateral distance of 2.5 km, in order to map in detail geology and mineralization initially identified using VTEM anomalies, which was followed by high density prospecting. The new outcrops exposed at Caradoc (TR19-02) and Percival (TR19-06) as well as elsewhere along the belt have enabled Eastmain to better understand this complex stratigraphy.
Exposed surface outcrops confirm the link between gold mineralization and sedimentary breccias in this portion of the KS horizon. These breccias are interpreted as sedimentary collapse breccias in siltstones, mudstones and banded iron formations (FFRs) that are part of the stratigraphy of the KS horizon. These breccias demonstrate a variable degree of silicification and also exhibit alteration to sericite, chlorite, amphibole and biotite. The breccia matrix may contain graphite and sulphides (pyrrhotite ± pyrite). According to observations, magnetite is often replaced by pyrrhotite within silicified sequences. Gold mineralization increases with the degree of silicification and may also have been reconcentrated by deformation and folding along the KS horizon. In addition to the zones of sedimentary breccias, anomalous values (100-200 ppb) of gold were also observed over tens of meters thick in units of graphitic siltstone.
At the Percival discovery, the FFR horizons are locally associated with thin bands of garnet amphibolite that are part of the iron formation sequence and are also interbedded with strongly silicified and sericitized shales (weathered argillites).
The main horizon of FFR at Caradoc does not present any intense breccia in the exposed outcrop in the trench. On the other hand, we clearly observe evidence of plastic deformation of sedimentary rocks at this location. The alteration mineralogy in FFR is very well developed at this location and takes the form of alteration parallel to bedding and controlled by fracturing of magnetite and grunerite beds. The intercalated bands of amphibole-garnet iron formation at this location are altered to sericite with grunerite (and anthophyllite) and sulphide mineralization (5-7% Po + Py). The most intense gold mineralization exposed at Caradoc is found in these amphibole-garnet-grunérite units, notably including the discovery sample which assayed 10.3 g / t Au. At the north end of the Caradoc trench, three channel samples intersected gold mineralization in a mudstone breach (1.16 g / t Au over 2.89 m). Considering the results and the lithologies exposed at this location, the trench has been enlarged and further sampling results are yet to come.
Near the Percival discovery, trench TR19-06 exposed a complex sequence of collapse breccia consisting of fragments of banded iron formations and mudstones with varying degrees of silicification. Gold mineralization, with values up to 1.23 g / t Au over 27.2 m, was identified at this location. The stratigraphic and structural relationship between the Percival trench and the TR19-06 trench is currently under investigation in order to gather more information on the impact of the deformation on the breccias and gold mineralization.
High density prospecting
As part of the high density prospecting program, 1,342 grab samples were taken along crossings systematically spaced 50 m apart along the KS horizon, targeting geochemical anomalies in soils and VTEM anomalies defined in the fall 2018. The prospecting was facilitated by the use of Beep-Mat ® devices , which measure magnetic susceptibility and electromagnetic conductivity.
The results published today allow the identification of 6 VTEM targets, previously identified for evaluation, associated with As anomalies and distributed along the northern branch of the KS horizon. Further field monitoring work is planned on these areas with a view to selecting the preferred areas for trenching and drilling targets. The FIGURES 5 and 6 show the distribution of rock samples and analytical results for gold and arsenic achieved so far along the northern branch of the horizon KS. For more details on the high density prospecting program, please see the press release issued on August 13, 2019 .
To view FIGURES 1 to 6 , please click on the following link: http://www.eastmain.com/_resources/news/Images/ER-190910-KStrenching.pdf
This news release has been compiled and reviewed by William McGuinty, P.Geo. and vice-president, exploration of Eastmain, and Carl Corriveau, geo and director of exploration of Eastmain, each a qualified person under NI 43-101.
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 A strict Q / CQ, 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 samples are dried and then crushed to 75% passing a 2 mm sieve. A 250 gram sub-sample is then pulverized to a nominal 90% particle size passing through a 75 micron sieve. All samples are analyzed by fire assay with atomic absorption (AA) finish on a 30 g aliquot of the sprayed material. Samples with a grade greater than 5 g / t Au are reanalyzed by fire assay with a gravimetric finish.
The channel samples taken from the trenches and the samples of half-core drill bits are packaged and delivered to the ALS Minerals laboratory in Val-d'Or. The samples are dried and then crushed to 70% passing a 2 mm sieve. A 1000 g sub-sample is pulverized at a nominal particle size of 85% passing a 75 micron sieve. The remainder 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 atomic absorption (AA) finish on a 50 g aliquot of the sprayed material. The results obtained above 5 g / t Au are reanalyzed by fire assay with a gravimetric finish. 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 (“PEA”) 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.