Frontier Lithium confirms high grade lithium on a historical showing on the PAK Lithium Project
Sudbury, Ontario, February 28, 2019 – Frontier Lithium Inc. (TSX.V: FL) (the “Company) is pleased to announce results from the confirmation of a historical showing of the Pennock Lake Pegmatite on the PAK Lithium Project (“The Project”), located 30 km north-west of the PAK deposit (Figure 1). The showing is an LCT (Lithium Cesium Tantalum) pegmatite intruding vertically into granitoids and metavolcanics. It was confirmed in the final days of a geological mapping program in late September 2018. It was originally described by L.D. Ayers (Ontario Geological Survey; Ayres et al., 1972) as “fine-grained spodumene….in a white pegmatite dike”
- An historical LCT Pegmatite showing, referred to as the Pennock Lake showing was confirmed 30 km northwest of the PAK Lithium Deposit;
- The surface area of the showing pegmatite is minimum 30m by 16m;
- The outcrop consists entirely of spodumene and quartz intergrowth (SQUI) and lithium contents in a grab sample gave 4.41% Li2O;
- The results from electron microprobe work from spodumene in the western dikes and outcrop with an average of less than 0.1% Fe2O3, indicate similar Fe2O3 content as the PAK deposit.
Figure 1: Location Map of the Pennock Lake Pegmatite showing historical showings.
Initial mapping and sampling indicate zones that appear similar to the Lower Intermediate Zone at the PAK Deposit. Aplite, feldspar and spodumene is common throughout the outcrop exposure. Grab sample from the north-west outcrop contain 4.41% Li2O.
The Company cautions that the grab sample result may not be indicative of the body being sampled.
Figure 2: The Pennock Lake Pegmatite outcrop was visited in September 2018. The outcrop’s exposure is limited by vegetation but currently measures approximately 30 × 16 m and consists entirely of spodumene + quartz intergrowth (SQUI).
Limited EMP (electron microprobe) work was completed on spodumene from polished thin sections from one grab sample collected at the pegmatite outcrop. The results indicate similar Na2O and Al2O3 content for spodumene as the PAK Deposit. The iron oxide (Fe2O3) content of spodumene from this initial work averages less than 0.10%, which is similar to high-purity spodumene at the PAK Deposit (Figure 3). More work will be completed on the impurity assessment as the pegmatite zonations become better understood.
Figure 3: Results of electron microprobe of spodumene from the Pennock Lake Pegmatite show mean Fe2O3 contents less than 0.1 wt.% Fe2O3. Results are compared to initial Spark pegmatite analyses and those at PAK (UIZ – Upper Intermediate Zone; LIZ – Lower Intermediate Zone)
“The Pennock Lake showing highlights the potential of the Electric Avenue.” stated Trevor Walker, President and CEO. ““The west dike exposure is very consistent and appears very similar to the PAK deposit given it’s high grade and low iron properties. We will be expedient with our assessment of the showing because we see the leverage it represents for the further de-risking it provides to the development of the PAK Lithium Project”.
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, grab samples are collected from outcrop using a rock hammer to best represent the site. The samples are described, placed into a poly sample bag with a numbered sample tag and then shipped to the assay lab for quantitative multi-element analysis.
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.