Government and academic geologists completed detailed mapping of the Lac Okaopéo area, including the Property in 2013 (Gosselin et al 2013, Moukhsil et al 2014). During this work, two radiogenic, rare-earth-enriched pegmatite occurrences were discovered, initially catalogued as 13-TC-5072B and 13-FS-1202C (Figure 1). Allanite (an epidote capable of carrying large cations such as the REEs, uranium and thorium), monazite (a thorium and REE-bearing phosphate) and parisite (a REE-bearing carbonate) were noted in sample descriptions from these and other pegmatite dykes locally (Turlin et al 2017). Grab rock samples returned the following values, as reported in Gosselin et al 2013 and Moukhsil et al 2014:
13-TC-5072 (sample B): 1330ppm La, 2360ppm Ce, 788ppm Nd (4.80% ppm total LREE)
13-FS-1202 (sample C): 1.53% La, 2.94% Ce, 1.1% Nd (6.04% total LREE), 0.28% Th
Nine claims were staked to cover these MERN discoveries by Mario Bourque and Guy Barrette, prospectors from the Baie-Comeau area. Bourque and Barrette mobilized an excavator to the area and stripped three areas close to the 13-FS-1202C occurrence, which they referred to as the “Lucia” site. Twenty grab samples were cut from the smooth bedrock with a channel saw, from numerous locations mostly in an area of about 50 m of the 13-FS-1202 site to the north and east. No detailed geologic mapping was completed. The highest results were from sample 1, a duplicate of the MERN sample, which gave:
3510ppm La, 7120ppm Ce, 792ppm Pr, 770ppm Th.
The Lac Ducharme Property is located in the Manicouagan regional county municipality (MRC) in the Cote-Nord region of eastern Québec, 150 km north of the largest regional town, Baie-Comeau, and 12 km southwest of Manic-Cinq, a service settlement for the Daniel-Johnson hydroelectric station.
The Property consists of twenty-three claims for a total of 1,257ha.
The Property is traversed by a regional-scale fault which runs southwest through the eastern half of the Property. The fault separates two granitoid bodies; the Castoreum pluton to the southeast (magnetite-porphyritic granite/monzonite) and the Bardoux 1 pluton to the northwest (garnet-bearing granite with rapakivic feldspar phenocrysts) (Figure 2). The plutons date to 1393±8 Ma and 1487.6±6.8 Ma respectively (Moukhsil et al 2014). This divide is easily visible in regional magnetic data which shows considerably more magnetic relief in the Castoreum pluton than the Bardoux 1 pluton. Quebec government reports mention that dykes of pegmatite are found in both plutons.
A later fault with right-handed movement runs north-northeastward through the western edge of the property, displacing the contact between the plutons. The southern extreme of the property covers the end of a wedge of quartzite- and marble- derived gneisses of the Plus-Value Complex, which are the oldest lithologies in the Property area (Turlin et al 2017).
The northern extreme of the property covers part of a gabbro or gabbronorite lens, part of a string of bodies oriented east-northeast (the Louis Suite). Pegmatite dykes at both of the known mineralized sites on the Property form swarms with a steep southward dip and a rough NE/SW-orientation. This orientation appears to be shared by the unnamed regional-scale fault, and there may be a fault-related structural control on the emplacement on the dykes. Individual dykes are 10-100 cm thick. The dykes consist predominantly of quartz, potassic feldspar, plagioclase and biotite and exhibit localized grain size banding and zoning varied texture crystallization, magmatic brecciation and quartz chambers.
Based on their distinctive geochemistry (LREE enrichment, high Al/Na+Ca+K ratio) they are believed to derive not from granitoids but from the partial melting of metasediments (Turlin et al 2017). Turlin et al (2019) suggest that the pegmatites in the Lac Ducharme area (and, by extension, the LREE mineralization) could be derived from sedimentary units of the Parautochonous belt, which may lie below the Allochthonous belt.
Tactical has not yet completed any sampling or analytical work on the Property. The following comments refer to the historic work completed on the Property.
Based on field photographs and sample descriptions, the MERN (Moukhsil et al 2014) and Barrette (2015) samples were cut from stripped bedrock using diamond saws and removed with hand tools. Samples were taken in and around the 13-FS-1202 occurrence wherever pegmatitic material was encountered or any other indicator of potentially economic mineralization, such as sulphide disseminations.
The Property was visited by independent consultant, Martin Demers, P.Geo, of Minroc Management on the 5th May 2021 (Lac Ducharme Technical Report, 2021). During the visit, the geology was compared and verified to the past interpretation completed by previous authors, and several historic sampling locations could be identified and tied to individual samples from the MERN and Barrette exploration programs.
The original assay certificates were not recovered from the historical rock sampling completed in 2013 (MERN sampling – 13-FS-1202C occurrence) that returned 6.04% REE. Assay certificates were recovered and verified from the sampling completed by previous operators in 2014 (Barrette sampling) that returned assay values from trace to 1.48% REE. The sampling procedures for the MERN and Barrette work are not well documented at the field level. But it is important to note that since the MERN studies were academic in nature, there would have been a significant emphasis on ensuring sample integrity and minimizing sample contamination.
Turlin et al (2017) state that samples were delivered to Activation Laboratories (Actlabs) of Hamilton, Ontario at which they were prepared by Li-metaborate or Li-tetraborate fusion and analyzed by ICP-AES and ICP-MS. Thin sections were analyzed using an electron microprobe at the GeoRessources Lab, Université de Lorraine, France.
Actlabs facilities conform to the requirements of the ISO/IEC 17025 Standard (General requirements for the competence of testing and calibration laboratories). Actlabs regularly takes part in proficiency testing. Further, Actlabs facilities also conform to CAN-P-1579 (Mineral Analysis/Geological Tests) as set out by the Standards Council of Canada. Actlabs is independent of all past and present interested parties.
Samples were delivered to ALS Minerals of Val-d’Or, Québec, where the samples were prepared. From here the samples were shipped internally by ALS to their Vancouver facility where they were assayed by “ME-MS81” lithium borate fusion with ICP-MS analysis for a “trace element” suite including the REEs, as well as “ME-4ACD81” four-acid digestion with ICP-AES analysis, for a suite of base and precious metals. The ALS assay certificate appends the Barrette (2015) report.
ALS typically runs internal QA/QC analyses alongside work orders including blanks, standards and duplicates, though this information is not documented in the Barrette (2015) report.
ALS facilities conform to the requirements of the ISO/IEC 17025 Standard (General requirements for the competence of testing and calibration laboratories), and regularly take part in proficiency testing. Further, ALS facilities conform to CAN-P-1579 (Mineral Analysis/Geological Tests) as set out by the Standards Council of Canada. ALS is independent of all past and present interested parties.
Anna Hicken, a consultant to Tactical Resources, is a “qualified person” as such term is defined in National Instrument 43-101 and has reviewed and approved the technical information and data included on this website.
Readers are cautioned that a qualified person has not verified the data disclosed, through sampling, analytical, nor test data. Information pertaining to the Lac Ducharme Project was obtained from assessment reports submitted to the Quebec government. A qualified person has not completed sufficient work to verify all the historic information on the Project, particularly in regard to the MERN historical sampling results. However, Ms. Hicken believes that the analytical results were completed to industry standard practices. The information provides an indication of the exploration potential of the Project but may not be representative of expected results.
CLICK HERE for the NI 43-101 TECHNICAL REPORT on the LAC DUCHARME PROJECT, MANICOUAGAN, QUÉBEC for TACTICAL RESOURCES CORP.
Gosselin, C; Guemache, M; Tremblay, A; 2013: Nouvelles cibles pour l’exploration minerale, travaux geoscientifiques 2013. SIGEOM PRO 2013 02.
Moukhsil, A; Solgadi, F; Belkaeim, S; Elbasbas, A; Augland, L; 2014: Geologie de la region du lac Okaopéo, Cote-Nord. SIGEOM RG 2014 03.
Turlin, F; Andre-Mayer, AS; Moukhsil, A; Vanderhaeghe, O; Gervais, F; Solgadi, F; Groulier, PA; Poujol, M; 2017: Unusual LREE-rich, peraluminous, monazite- or allanite bearing pegmatitic granite in the central Grenville Province, Québec. Ore Geology Reviews (2017).
Turlin, F; Vanderhaeghe, O; Gervais, F; Andre-Mayer, AS; Moukhsil, A; Zeh, A; Solgadi, F; 2019 : Petrogenesis of LREE-rich pegmatitic granite dykes in the central Grenville Province by partial melting of Paleoproterozoic-Archean metasedimentary rocks: Evidence from zircon U- Pb-Hf-O isotope and trace element analysis. Precambrian Research 327.