Highlights of the 2023 Field Season Confirms Greenfield Lithium Pegmatite Vectors:
- Regional metamorphic grade: upper greenschist / lower amphibolite.
- Occurrence of peraluminous granite and leucogranite on Orford's
Lithium Properties . - Key minerals identified in pegmatite indicative of proximity to fertile parent granite:
- green muscovite (+/- garnet, tourmaline, fluorite).
- Assays indicate pegmatites are enriched in lithium, beryllium, tantalum, cesium, and rubidium
- LCT-bearing pegmatites on at least 3 properties (Figure 1, Table 1) suggests high prospectivity for additional dykes.
- Opportunity to generate additional targets and provide geochemical vector towards mineralization (more fractionated LCTs) using till assay data (results outstanding).
Orford has leveraged its competitive advantage in the region based on multi-year local operational experience and logistical preparedness which includes access to its centrally located camp, airstrip and fuel reserves. This has helped lead to the discovery of lithium anomalous dyke swarms on three of the Nunavik Lithium Properties. These dykes are up to 40 m-wide and can be traced for several kilometers. They contain variable green muscovite, tourmaline, +/- garnet, beryllium and apatite and, based on this mineralogy, plot within the field of prospective pegmatites (Figure 3). All grab sample assays have been received and enriched LCT pegmatites have been confirmed on kWatt, Flare and Cathode properties (Table 1). LCT enrichment is defined by the following concentrations in ppm which are values greater than Cs>30, or Ta>20, or Li>100, or Rb>1000, or Sn>30, or Ga>20, which represent a magnitude larger than Fertile Granites. Overall, field station and sampling density is less than three field stations and one sample per one km2, which offers the potential for significant discoveries after the 2023 preliminary work which has confirmed Lithium Pegmatite prospectivity.
An additional 550 till (frost boil) samples have been collected on the Radiant, kWatt and Wire properties to possibly identify "blind" LCT pegmatite which are not exposed at surface. Till assays results are expected at approximately the end of November and may identify additional targets for follow up. The till sampling was done in areas where there is strongly anomalous lithium in lake bottom sediment sample surveys completed by the
Table 1: Assay Values for Enriched LCT Pegmatites from Grab Samples Compared to Background and Fertile Granites. Note that grab samples are selective by nature and values reported may not be representative of mineralized zones. Number of Samples on each property: Cathode=30, kWatt=213, Flare=117.
Maximum Value from Orford Properties | Number of Enriched1 | ||||||||
Indicator | Average Crust - | Fertile | Enriched Value Threshold (ppm)1 | Cathode (ppm) | Flare (ppm) | kWatt (ppm) | Cathode | Flare | kWatt |
Cs | 3.7 | 27 | 30 | 25.8 | 46.7 | 70.8 | 0 | 5 | 17 |
Li | 20 | 51.7 | 100 | 45 | 107 | 375 | 0 | 2 | 29 |
Rb | 112 | 473 | 1000 | 638 | 1180 | 1410 | 0 | 2 | 11 |
Ta | 2.2 | 2.7 | 20 | 23.5 | 19.3 | 39.4 | 2 | 0 | 8 |
Sn | 5.5 | 19 | 30 | 20 | 21 | 47 | 0 | 0 | 6 |
Ga | 17 | 20 | 20 | 68.2 | 54.7 | 103 | 30 | 92 | 178 |
______________________________ 3 Reference, Selway, 2005. A Review of Rare-Element (Li-Cs-Ta) Pegmatite Exploration Techniques for the |
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To view further details about Orford's exploration projects please visit Orford's website, www.orfordmining.com.
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