Frontier Lithium Expands Eastern Extension of the PAK Deposit Intersecting a Low-Iron Intercept of 2.47% Li2O over 119 metres
Sudbury, Ontario, December 6, 2017 – Frontier Lithium Inc. (TSXV: FL) (“Frontier” or “the Company”) is pleased to announce the results of an exploration hole that was drilled after the completion of the 2017 geotechnical/geomechanical drill program. Diamond drill hole PL-27-17 was designed to step back and test the width and attitude of the pegmatite zone from the footwall (metasediment side) through to the hanging wall (granite side) on the down-plunge extension of the deposit. The assay and collar data for the hole reported is presented in Table I and Table II respectively.
- DDH PL-027-17 intersected 118.9 m of pegmatite averaging 2.47% Li2O from 237.3 to 356.0 m representing a true width of 55.7 m with a low-iron lithium enriched zone (Lower – Upper Intermediate Zone)
- DDH PL-027-17 includes 3.30% Li2O over 53 m from 287 to 340 m representing a true width of 25.0 m (Figure 1);
- DDH PL-027-17 includes a high-grade Lithium zone (Upper Intermediate Zone) of 14 m averaging 4.41% Li2O from 290.0 to 304.0 m representing a true width of 6.6 m;
- Based on this recent drill result, a Pre-Feasibility Study (PFS) originally scheduled to be completed by mid-December will now include an updated resource estimate and an underground component which will be released in early 2018, and;
- Mineralization remains open to depth and along strike to the northwest and the grade thickness is increasing to the east-south-east (down-plunge).
Table I – Collar Location and Assay Information
(1) The intervals in Table I are drill intersection widths. The “true width” is based on overwhelming evidence that the orientation of the pegmatite is sub-vertical.
(2) Li2O content in the Li enriched zones is predominantly associated with spodumene.
Table II – Collar Locations for Diamond Drill Hole
Figure 1 shows the split core in the core shack showing the white low-iron spodumene enriched zones in hole DDH PL-027-17.
“We are extremely pleased with the results from this drill hole as it lies down-plunge of the open-pit shell currently being used in the PFS study underway on the deposit and displays that the grade is persisting with depth with true widths of up to 55 metres with little in the way of contaminants or potential mining dilution”, commented Garth Drever, VP Exploration of Frontier Lithium. “These material facts have imposed an update to the resource model and also has prompted Frontier to include a low-cost, bulk underground mining component to the PFS, all of which is underway and expected to be announced now in early 2018. The predictability, along with 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.” Frontier is currently planning for 2018 exploratory diamond drilling to further increase the resource size.
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 NQ-sized drill core providing a 47.6 mm diameter sample. Drill hole PL-027-17 was oriented perpendicular to the strike of the pegmatite and drilled continuously across it. 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.