Frontier Lithium reports drilling results and confirms high grades and continuity of the PAK Lithium Deposit
Sudbury, Ontario, October 16, 2018 – Frontier Lithium Inc. (TSX.V: FL) (the “Company) is pleased to announce the results of a 1,221m Phase VI drill program completed in July 2018. The program was primarily planned to drill through the Pre-Feasibility Open Pit shell so that the Inferred Resources at depth under the pit shell could be intersected. The secondary objective was to further delineate the high grade Upper Intermediate Zone (“UIZ”) Reserves close to surface. Two drillholes, PL-028-18 and PL-029-18 were drilled from the NNE at a steep angle attempting to drill through the bottom of the pegmatite. Both holes successfully intersected the Inferred Resource at, and near, the base of the pegmatite and only PL-029-18 may have pierced the bottom.
Six shorter drillholes were used to better define the high grade UIZ at surface. The intersections determined that the high-grade UIZ portions of the unit are not as continuous as modelled, however, significant intervals of up to 50m exist of nearly pure spodumene and quartz with consistent grades of over 4% Li2O.
“We are extremely pleased with the results from this drill program as we successfully hit our targets and further strengthen the predictability of the deposit”, stated Trevor Walker, President and CEO of the Company. “With the conclusion of this drilling the Company will commence with an updated mineral resource calculation. The high-grade thicknesses intersected to date, and mineralization that remains open to depth and along strike, suggests this pegmatite could be significantly more robust than is currently known.”
The assay and collar data for the hole reported is presented in Table I and Table II respectively.
- DDH PL-028-18 intersected 219.75 m of pegmatite averaging 2.07% Li2O from 62.25 to 282.0 m representing a horizontal width of over 56 m with a lithium enriched zone (Lower – Upper Intermediate Zone);
- DDH’s PL-028-18 and PL-029-18 confirm and expand the Inferred Resource near the base of the current published Resource Estimate and under the 2018 Pre-Feasibility Open Pit Shell;
- DDH’s PL-030-18 to PL-036-18 better defined the high grade (Upper Intermediate Zone) with intercepts as high as 51.4m of 4.05% Li2O representing over 35m of horizontal width in DDH PL-035-18;
- Mineralization remains open to depth and along strike to the northwest and south-east whereby the grade thickness is increasing to the east-south-east (down-plunge).
Table I – Diamond Drill Hole Intercepts
* The intervals (“Width”) in Table I are drill intersection widths. The pegmatite is steeply dipping south-southwest to sub-vertical. Based on evidence that the orientation of the pegmatite is mostly sub-vertical, the Horizontal width is representative of the true width when the Azimuth of the drillhole is roughly perpendicular to the strike of the pegmatite which is 110 to 120°.
Li2O content in the Li enriched zones is predominantly associated with spodumene.
Table II – Collar Locations for Diamond Drill Hole
All scientific and technical information in this release has been reviewed and approved by Garth Drever, P.Geo., the qualified person (QP) under the definitions established by National Instrument 43-101. Under Frontier’s QA/QC procedures, the diamond drill contract specified BTW-sized drill core providing a 42.0 mm diameter sample. Sample security and chain of custody started with the removal of core from the core tube and boxing of drill core at the drill site. The boxed core remained under the custody of the drill contractor until it was transported from the drill to the secure on-site Core Shack facility by either the drill contractor or one of the Company’s designated personnel. At the on-site Core Shack, core boxes were opened and inspected to ensure correct boxing and labelling of the core by the drill contractor, photographed and then re-closed. The company geologists geologically logged and marked the core for sampling before it was photographed. Each core sample was assigned a tag with a unique identifying number. Sample lengths are typically one meter, but can be less depending on zone mineralogy and boundaries. Core marked for sampling was split using a diamond core saw on site and cut lengthwise into equal halves. Half of the core was sent to an analytical laboratory for quantitative analysis of select elements. The remaining half of the core is retained and replaced in the core box. All core remains securely in a locked sea-container on site.
All samples were assayed by AGAT Laboratories Ltd. (“AGAT”), an ISO accredited laboratory in Mississauga, Ontario. Sample blanks along with tantalum, lithium, rubidium and cesium certified reference material was routinely inserted into the sample stream in accordance with industry recommended practices. Field duplicate samples were also taken in accordance with industry recommended practices.