HLM Drills In-Fill On The Pak Lithium Project Intersecting 2.01% Li2O Over 66 Metres
Sudbury, Ontario – June 24, 2015- Houston Lake Mining Inc. (TSX.V: HLM), HLM is pleased to announce the results of four (4) infill drill holes designed to increase the confidence level of the Pakeagama Lake pegmatite deposit model in preparation for an updated resource statement expected prior to year-end. The assay and collar data for the 4 holes reported are presented in Tables I and II, respectively. The intersection summaries including the four drill holes general location and purpose are outlined in Table I below. The table also summarizes the lithium, cesium, tantalum and rubidium grades for the four drill holes by mineralogical zones for the pegmatite intersections.
- Diamond Drill Hole (DDH) PL-020-15 intersected 2.02% Li2O over 66.05metre (m) from 79.50m to 145.55m;
- DDH PL-020-15 includes a 5.85m wide lithium zone (Upper Intermediate Zone or UIZ) averaging 4.15% Li2O from 80.05m to 85.90m; and
- Mineralization remains open to depth and along strike to the northwest and southeast.
Table I – Core Length Intercepts (Pakeagama Lake pegmatite)
(1) The intervals in Table I are drill intersection widths. There is currently insufficient data to determine the true thickness of the pegmatite.
(2) Li20 content in the CIZ is predominantly associated with lithian micas and to a lesser extent (if any) in spodumene. Li2O content in the Li enriched zones is predominantly associated with spodumene.
n/a = Not applicable
The Upper Intermediate (UIZ), Central Intermediate (CIZ), Lower Intermediate Zones (LIZ) and Wall Zone (WZ) were previously described in the July 2, 2013 Press Release. Zones of sodic aplite are present in all holes and vary in width from tens of centimetres to several metres, and contain significant concentrations of Ta, Rb and Cs.
Noteworthy observations are that the NNE (footwall) boundary with the metasediments is consistent and predictable while the SSW (hanging wall) contact with the granite is somewhat erratic and complicated by granitic blocks and rafts, and appears to have been variably affected (metasomatized) by the pegmatite intrusion event(s). The mineralized pegmatite remains open along strike to the WNW and ESE, and at depth. Granitic blocks/rafts mapped on surface appear to diminish with depth. The scissor pair of DDH 15 and DDH-20 show that the granite observed at surface and cut in the top of DDH-15 does not persist at depth where the deeper portion of DDH-20 cut pegmatite.
“We are pleased with these infill results from the Phase III diamond drill program as all of the holes consolidate the Inferred and Indicated Resource Estimate announced January 28, 20151”, commented Trevor R. Walker, President of HLM. “The mineralized pegmatite intersections totalling 98.65m in DDH PL-020-15 will positively expand the current mineral resource estimate’s tonnage”.
Table II– Collar Locations for Diamond Drill Hole (DDH)
All scientific and technical information in this release has been reviewed and approved by Peter J. Vanstone, P.Geo., the qualified person (QP) under the definitions established by National Instrument 43-101. Under HLM’s QA/QC procedures, the diamond drill contract specified NQ-sized drill core providing a 47.6 mm diameter sample. The drill holes were 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 core was stored securely until moved into the Core Shack for processing. The company geologists logged the core, and then marked and tagged it for sampling and splitting. 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. The Core was then re-closed and shipped to the company’s off-site core splitting facility in Sudbury, Ontario. Core marked for splitting was cut using a diamond core saw with a mounted jig to assure the core was 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 incorporated into HLM’s secure, off-site core library.
All samples were assayed by Activation Laboratories Ltd. (“Actlabs”), an ISO accredited laboratory in Ancaster, 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.