Durango’s 100%-owned NMX East property is adjacent to the Whabouchi Lithium Deposit and Hydromet Plant Project, which has been the subject of a Feasibility Study and is planned to be developed into an open pit mining operation. This plant will produce lithium hydroxide, which is used in cathodes of rechargeable batteries.
The Property ground is highly prospective, being located close the established Whabouchi lithium deposit currently totaling 27,300,000 tonnes Proven and Probable reserves at 1.46% Li2O and is located 3 kilometres to the west of the NMX East Property.
Results from the field reconnaissance survey conducted in August 2016 on the NMX East property included the discovery of three distinct lithium-bearing intrusions, which have been characterized as LCT (lithium-cesium-tantalum) pegmatites, and the generation of clear drilling targets.
Interpretation of Lithium, Cesium, Tantalum, and Rubidium Anomalies
Results from the exploration program at NMX East clearly indicate the presence of three distinct pegmatite intrusions which exhibit significant lithium, cesium, tantalum, and rubidium anomalies. One intrusion occurs on the property’s East Block, while two intrusions occur on the South Block.
The Nemiscau Region exhibits a markedly limited amount of bedrock exposure, which produces a very challenging environment for surface sampling. On average, there is approximately less than 5% exposure on the NMX East property and a large portion of the surrounding region. Evidence suggests that the majority of pegmatite bodies in the Nemiscau Region are obscured beneath the glacial diamict which blankets the region. Nemaska Lithium Inc.’s recent drilling results also report mineralized intercepts as deep as 500 metres below surface (2). As such, Durango’s geological team suspects the three viable lithium-bearing LCT pegmatites, which occur at surface on Durango’s NMX East property, may represent smaller exposures of potentially much larger intrusions which may continue both at depth, laterally, and along strike.
Furthermore, most LCT pegmatites exhibit concentric zonation, particularly of spodumene (Li), pollucite (Ce), columbite-tantalite (Ta), and beryl (Be) mineralization. This mineralization is typically concentrated in the core margin to core zone of the pegmatite intrusion, with dilute quantities in the intermediate zone. This zonation is illustrated in Figure 2.
Figure 2. Deposit-scale zoning patterns in an idealized pegmatite (Updated Sep 21, 2016)
(1) Theberge, D. (2011). NI 43-101 Technical Report Pertaining to the Abigail Property, Nemiscau Area, Northern Quebec, Canada, prepared for Tucana Lithium Corp.
(2) Bradley, D., McCauley, A. (2013). “A preliminary deposit model for lithium-cesium-tantalum (LCT) pegmatites”, USGS Open File Report 2013-1008.