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Lynas Corporation Ltd.
Summary
| Project: | Mount Weld | |
|---|---|---|
| Deposit: | Mount Weld | |
| Location: | Australia | |
| Commodities: | Rare Earth | |
| Date: | 11/28/2017 | |
| Report Code: | JORC | |
| Report Type: | Exploration/Drilling Update | |
| Project Stage: | Active Mining & Production | |
| Report details: | 28-11-2017: Lynas Corporation Ltd. announces an Exploration/Drilling Update report for its Mount Weld deposit at the Mount Weld project. Drilling results incl. 26m @ 13.3% REO from 60m. The Mt Weld Central Lanthanide mineral deposit is separated into diff | |
| Resources: | (not mentioned in this report) | |
| CP/QP: | [Overall Report]: Brendan Shand (Internal) | |
| ABSTRACT: | The Mt Weld Central Lanthanide mineral deposit is separated into different regolith zones of mineralisation. Within the regolith profile of the Mt Weld Carbonatite there are 3 layers of Saprolite represented by Limonitic and Silica rich nodules known as the LI (Limonite) ore zone; a Goethitic and Haematitic silty layer of Saprolite known as the CZ (Central Zone) ore zone and a layer of Apatite rich material known as the AP (Apatite) ore zone. The rare-earth oxides are found predominantly in Monazite with minor Cerianite, Florencite and Xenotime forming concentric rings across the carbonatite regolith REO zone with the light REO minerals in the centre and heavy REO minerals on the outside (Duncan mineral zone). Below the Mt Weld Central Lanthanide mineral deposit is the partially weathered Saprock of the Mt Weld Carbonatite called the TR (Transition) zone followed by the unweathered FR (Fresh) zone. The concentric regolith grade and mineral zonation across Mt Weld Central Lanthanide mineral deposit is consistent with the primary REO grade variation observed within the unweathered Mt Weld Carbonatite mineralisation. During Mining Campaign 1 (2007/8) the LI and CZ ore zones were mined and stockpiled according to ore type and REO grade. When the Mt Weld Processing Plant was commissioned in 2011, it was fed a blend of CZ ore only. After metallurgical test work, LI ore was introduced into the process feed during 2014 and over time , with continued careful process management, the LI ore has been similar to equivalent grade CZ ore in terms of processing plant performance. The portion of LI ore in the process feed has subsequently been increased over time. The AP ore zone lies below the LI and CZ ore zones. Due to the Apatite content of the AP ore, it will require modifications to the flotation circuit used for the CZ/LI ore. These modifications will include a pre-flotation stage to remove the faster-floating apatite particles. | |
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