Grades from drill core matching assays of up to 994g Ag/t and 662g Ag/t from grab samples[1] along the northeast part of the Carlin West zone have not been recovered from silver structures, which vary from 0.5m to 22m in length. The Company believes that this is most probably because intersections of mineralized core with poor recovery were commonly adjacent to higher grade intercepts in most DDHs in that sector. Those holes drilled in the southeast part of the zone's core, with the exception of one hole, were not adequately positioned enough to intersect the zone's core within the highly receptive Keno Hill Quartzite (KHQ). The recently delineated 240m by 55m AJ zone, 400m to the north of
2022 diamond drilling and detailed soil sampling
A total of 1,070 metres of diamond drilling was completed in eight DDHs focused on the Carlin West zone as delineated from prospecting, soil geochemistry, geophysics and the results from four DDHs drilled in 2020 and 2021. The 2022 DDHs intersected structures along the southwest flank of the recently expanded
Keno Hill Quartzite (KHQ), quarzitic metasediments (MSD), graphitic schists (GSH) and greenstone (GRE) (metamorphosed gabbro and diorite) were the common lithologies encountered in the drilling. KHQ, in some cases interbedded with MSD and GSH, is dominant in holes MLM22-10 through 13. Interbedded MSD and GSH are the predominant lithologies in MLM22-05 through MLM22-09. GRE was noted at depth in MLM22-09, 10 and 13. Extensive silicification was noted in MLM22-05-11. Quartz veining, some parallel, and some at acute angles, to foliations is extensive throughout most of the DDHs. All DDHs contain veins and disseminations of pyrite and pyrrhotite. Galena, sphalerite, siderite, tetrahedrite, siderite and sulfosalts are occasionally present in some structures, especially those containing quartz veins.
MLM20-01, MLM20-02, MLM21-03 and MLM21-04 all encountered structures containing anomalous silver, both in and below the GRE, as they progressed under or parallel to the highly anomalous
MLM-05, MLM22-06, MLM-07 and MLM22-09 lie along the northwest extension of the Carlin West zone between prospecting samples running from 3994g Ag/t and 662g Ag/t. MLM22-05 crosses the narrowest part of the Carlin West core zone adjacent to grab samples grading 662 and 3994g Ag/t and intersected fine stringers yielding silver values above background over 31m starting at 79.8m. The DDH also contains two silver structure intercepts anomalous in silver; one measuring 1.0m beginning at 83m down hole; and a second measuring 6.9m beginning at 90.1m. The later interval was missing 0.2m of core adjacent to the 90.6m intercept of 8.4g Ag/t.
MLM22-07 collars into the Carlin West zone but is missing an aggregate 1.4m of core within its friable portions. Of note is a missing 0.4m interval of core adjacent to a 2.0m intercept grading 1.8g Ag/t, starting at 4.6m downhole. Starting at 98m, stringers yielding silver values above background over 22m downhole are common with 4 intercepts exceeding 1g Ag/t anomalous silver. MLKM22-06 intersects the Carlin West stringer zone over 15m starting at 85m downhole. It intersected two silver intercepts, one 5.6m in length and a second of 1m in length, exceeding 1g Ag/t within the stringer zone with 0.2m of core loss at the upper intercept. These structures are characterized by fractured and brecciated quartz zones. MLM22-09 contains eight silver structures between 1m and 3m thick above 75m downhole and outside the Carlin West zone plus three structures between 8 and 6.3m long from 84 to 166m down hole, within the Carlin West zone as projected from surface. The lowest structure was within a GRE.
MLM22-13 contains two shallow weakly anomalous silver structures, but both project as being outside the core zone. MLM22-12 was collared at a location where the core zone overlies KHQ. It intercepted a narrow structure containing weakly anomalous silver, at a depth of 84m. An IP-Resistivity profile cutting KHQ and highly anomalous surface soils suggest that MLM22-12, which intersected KHQ above the GRE, was collared in a location having a high probability of intercepting high-grade silver.
MLM22-10 and MLM22-11 collared in the Carlin West stringer zone produced a fractured intercept that did not produce a complete transect of the structure. Soil sampling from this season indicated that these holes were collared in the centre as opposed to the east of the anomaly as was planned. Both holes intersected a lower stringer zone over 10m wide with silver values up to 14.5g Ag/t. MLM22-10 ended in a mineralized vein 3cm thick. This was below the minimum sampling interval of 0.3m, which was the sample taken from the end of the DDH that yielded 15.2g Ag/t. This stringer zone corresponds to surface float assaying 662g Ag/t and a muted soil anomaly.
He continued, 'This mimics the historical difficulties defining high grade shoots through diamond drilling within the Keno Hill Silver Camp. Poor recoveries within the broad silver structures are cause for concern at both Carlin-Roop and at some ore bodies in the Keno Hill Silver Camp. This was the case at the
Sample Analysis, Collection and Quality Control
Drill core was transported from drill sites at Carlin West to a secure location in Keno or
Qualified Person (QP) Statement: Field work was directed by
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About
Mayo is actively engaged in the exploration and development of five precious metal projects in the Tombstone Plutonic Belt of the
Mayo is tentatively proposing to trench and drill the Carlin West and AJ zones at Carlin- Roop and numerous highly prospective gold anomalies within the Anderson Gold Trend at
Cautionary statement
This news release contains certain forward-looking statements, which are based on the opinions and estimates of management at the date the statements are made and are subject to a variety of risks and uncertainties and other factors that could cause actual events or results to differ materially from those projected. There can be no guarantee that Mayo Lake will be able to obtain a public listing as scheduled in this document. Mayo Lake undertakes no obligation to update forward-looking statements if circumstances or management's estimates or opinions should change. The reader is cautioned not to place undue reliance on forward-looking statements.
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