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The Superb Lake property consists of 8 mining claims totaling approximately 2,187 hectares land in the O’ Sullivan Lake / Maun Lake Area, Thunder Bay Mining District of Northwestern Ontario, Canada. It is located about 375 kilometers northeast of Thunder Bay, with the nearest town to the property situated 45 km to the south of the Property.
The property is situated in the eastern part of Wabigoon Subprovince of the Superior Geological Province. This Subprovince consists mainly of Archean metavolcanic and metasedimentary rock sequences intruded by larger granitoid plutons, mainly granodiorite to granite in composition. The property is in the Onaman-Tashota geological belt which straddles the entire width of the eastern Wabigoon subprovince. The metavolcanics comprise minor ultramafics and abundant mafic to felsic rocks. The assemblage is in faulted contact with the metasedimentary rocks of the English River subprovince. The assemblage is accompanied by quartz porphyry dikes that transect the mafic metavolcanic strata and mafic and felsic intrusions across the width of O’ Sullivan Lake area. The metasedimentary rocks are composed of medium to thinly bedded, locally garnetiferous, biotite-quartz-feldspar wackes, belonging to English River assemblage which hosts the Superb Lake lithium pegmatite exposed along the northwest shoreline of Superb Lake. This lithium-rich pegmatite was apparently discovered around 1955. Several strong, northerly trending faults 020?040 degrees have been identified in the area. The Hurd Lake Fault Zone occurs within the Northeastern end of the Kowkash Greenstone Belt where the belt appears to start pinching out at O'sullivan Lake. The fault is a northeast trending (040 to 045 degrees) structure with numerous parallel copper-gold showings associated with it. The Superb Lake pegmatite is known principally for its spodumene bearing lithium and niobium / tantalum mineralization.
The Property area has two types two types of deposit models which are:
Superb Lake area has had historical exploration work carried out since the 1950s’ discovery of lithium along the shores of Superb Lake. In 2003, Ontario Geological Survey (OGS) carried out regional investigation of mineralization associated with rare element pegmatites and related S-type, peraluminous granites in the Superior Province of Ontario. A part of this work was carried out on the Superb Lake pegmatite within the Property Area. This work included mineralogical and petrochemical detection of fertile, peraluminous parent granites coupled with regional sampling aimed at discerning exomorphic dispersion in the host rocks adjacent to rare-element pegmatites. The Superb Lake pegmatite has a minimum exposed strike length of 16 m and its width varies from 2.5 m at the shoreline to a maximum of 3.7 m where an old blast pit was excavated. A large bulk sample collected from the pegmatite by G.M. Stott from the blast pit area in 1988 contained Ta above the detection limit of 350 ppm, 142 ppm Be, 80 ppm Nb, 1464 ppm Rb, 99 ppm Cs and 56 ppm Sn.
Summer 2022 exploration work on the property included prospecting, geological mapping, sampling, ground geophysical surveys and assaying. A total of 26 grab rock samples were collected out of which eight samples were from the Superb Lake Pegmatite outcrops, 18 were from historical gold showing in the Holm Area.
Superb Lake pegmatite has spodumene as a principal lithium mineral which occurs in this pegmatite as large isolated crystals in a relatively fine-textured groundmass of feldspar, quartz, mica and other minerals, and to a lesser extent as a part of the groundmass itself. The results of four samples taken from spodumene rich part indicate lithium oxide (Li2O) values in the range of 1.77 % to 4.03%. Several narrow, aplite-like veins are situated within 30 m of the main pegmatite and reveal important evidence for the style of deformation. Four samples taken from aplite dykes indicate Li2O values in the range of <0.01% to 0.02%.
The results of sampling from Holms Area indicate gold values in the range of less than 5 parts per billion (ppb) to over 5,000 ppb using method “Au - Fire Assay AA”. The sample 884871 exceeded the method detection limit and was retested using method “Au - Fire Assay Gravimetric” and gave assays of 29.6 gram per tonne gold.
A VLF and ground magnetic survey was completed on Polpond Grid during June 25 to July 04, 2020 with a total 20.5 line-km at 50m line spacing and 25m stations. Similarly, a second magnetic / VLF was completed on the Holm Grid from July 12-19, 2020 with a total 15 line? km at 50m line spacing and 25m stations. The results of the Polpond survey indicate presence of an east-west running conductor extending for about 800 meters in the northwest part of the survey area.
The results of the Holm survey grid show two separate roughly east-west oriented conductive zones separated by a resistive zone. Each conductive zone is over one kilometer in length and is marked by isolated conductive bodies.
Medaro has not carried out any exploration work on the Property. The author visited the Property on September 06, 2020 to verify historical exploration work including trenching and sampling work, to examine mineralized outcrops and to collect necessary geological data. A total of five grab rock samples were collected by the author from the Superb Lake pegmatite outcrops, host metasedimentary rocks, and other exploration areas. The samples were delivered to ACTLABS in Thunder Bay, Ontario for analyses. All samples were under the care and control of the author and are considered representative. The samples were assayed by ACTLABS using Laboratory Code 8: ICP-MS PerOxide Fusion (FUS-MS-Na2O2). The samples assays indicated lithium (Li) values in the range of 0.0037% Li (0.008% lithium oxide) to 1.51% Li (3.25% lithium oxide), beryllium (Be) is in the range of less than 3 parts per million (ppm) to 156 ppm, cesium (Cs) 39.7 ppm to 165 ppm, niobium (Nb) 8 ppm to 153.5 ppm, and tantalum (Ta) 0.9 ppm to 578 ppm. These results are consistent with historical exploration results.
The data presented in this report is based on published reports and data available from Medaro, Ontario ENDM (Ministry of Energy, Northern Development and Mines), the Geological Survey of Canada, and the Ontario Geological Survey. All consulted data sources are deemed reliable. The data collected during present study is considered sufficient to provide an opinion about the merit of the Property as a viable exploration target.
Based on its favourable geological setting indicating spodumene bearing pegmatite hosted lithium and rare metals mineralization in surface grab samples and trenches; gold and base metals anomalous values found on surface and drill holes; and findings of present study, it is concluded that the Superb Lake Property has good potential for discovery of economic concentration of lithium and gold mineralization through further exploration. Good infrastructure and availability of exploration and mining services in the vicinity makes it a worthy mineral exploration target.
Phase 1 – Geophysical and Geochemical Surveys, Prospecting, Trenching and Sampling
There are two types of mineralization and deposit types identified for the Property which need a focussed exploration work for each type as follows:
Phase 2 – Diamond Core Drilling
If results from the first phase are positive, then a detailed drilling program would be warranted to check the most promising targets identified because of geophysical and geochemical surveys, trenching, and sampling work in Phase 1. The scope of work for drilling and location of drill holes would be determined based on the findings of Phase 1 investigations.