공시 • Jan 26
Sky Metals Limited Provides an Update on Doradilla, Midway and 3KEL, on the DMK Line At the Doradilla Project
The Board of Sky Metals Limited advised of the discovery of strong and widespread REE mineralisation over the three (3) targets, Doradilla, Midway and 3KEL, on the DMK line at the Doradilla Project. The Doradilla-Midway-3KEL or `DMK' line is a 16km long skarn that has been the focus of extensive exploration for tin and tungsten, particularly during the 1970s and 1980s. SKY has selected a number of samples from historic drilling in 1979, 2007 and 2012, along with samples from SKY's drilling over the last 3 years. These samples were assayed for rare earth elements (REE), with results reported as total rare earth oxides (TREO). A selection of samples were taken from a total of 26 holes and returned consistent intercepts of over +1,000ppm TREO from all holes from all three deposits on the DMK Line. The results to date have established strong REE mineralisation over multiple kilometres at all three targets, demonstrating that there is very large scale REE mineralisation present. Furthermore, the results to date show the most valuable Nd + Pr + Dy + Tb represents over 20% of the TREO on average at present. All holes tested for REE are open in all directions with a majority of the REE intercepts also open either up hole, down hole or open both up hole and down the hole. Importantly, none of the holes re-assayed for REE were drilled to specifically target REE mineralisation. In addition to the three known deposits on the DMK line, there are also multiple kilometres of strike along the DMK line which has not been tested with any drilling. A selection of historic drill samples were re-assayed for REE to test the Doradilla Target for the potential to host REE mineralisation. The samples were predominately from aircore holes drilled by YTC Resources in 2012, which were then drilled to test the oxide-near surface tin mineralisation. Re-assaying of this selection of samples has shown strong, broad and widespread REE mineralisation at Doradilla with consistent +1,000 TREO grades and broad, open intervals. Highlight TREO results at Doradilla from this work: DRAC012: 8m @ 4379ppm (0.44%) TREO from 32m, including; 2m @ 8011ppm (0.80%) TREO from 34m. The Midway Target has also been shown to host shown strong, broad and widespread REE mineralisation. The most recent drilling of the Midway Target was in 1984 and SKY has fortuitously secured samples from the 1979 drilling of 27 shallow drag bit air drillholes (named AMW01-27) from the W B Clarke Geoscience Centre which houses the NSW Core Library and also stored samples from this 1979 drilling. SKY resampled and assayed 7 of these holes and all have returned wide intercepts of +1,000ppm TREO mineralization. The best TREO results to date have been from the Midway Target. This is to be expected as the REE grades are predicted to be higher closer to the mineralising granite and the Midway Target is the nearest target to the mineralising Midway Granite at Doradilla. The samples taken from the drilling at Midway have the higher REE grades and widest intervals to date and is extremely encouraging to host a significant REE deposit. Highlight TREO results at Midway from this work:: AMW10: 33m @ 4981ppm (0.50%) TREO) from 15m, including; 12m @ 8781ppm (0.88%) TREO from 25m. AMW20: 35m @ 2002ppm (0.20%) TREO from 15m, including; 10m @ 3703ppm (0.37%) TREO from 20m. As at the Doradilla Target, many of the samples assayed at 3KEL for REE have come from aircore drilling completed by YTC in 2007, drilled to test the tin mineralisation, along with drilling completed by SKY over the last 3 year from 2019. As with the other two Targets on the DKM line, Doradilla and Midway, the 3KEL Target shows excellent potential to host strong and widespread REE mineralisation. This will also warrant further work to develop this potential over the coming months. Highlight TREO results at 3KELfrom this work: 3KDD018: 6m @ 2828ppm (0.28%) TREO from 13m, including; 0.7m @ 13910ppm (1.39%) TREO) from 16.4m. 3KRC006: 10m @ 2951ppm (0.30%) TREO from 11m. In combination with the metallurgical testwork, SKY aims to further grow this discovery along the 16km `DMK' Line with re-assaying of available samples from the historic drilling and SKY's early drilling in 2019. This is a uniquely cost- effective opportunity to continue to grow this promising discovery quickly. The recent drilling of the 3KEL Target in the last 12-18 months will also be resampled to test for REE mineralisation. The re-sampling is planned to be combined with a drilling program of shallow aircore drillholes to test the weathered profile over the 16km `DMK' Line. The REE mineralisation has been discovered to be hosted in the weathered clays which form over 60m deep, overlying the `DMK' line for int's entire length. The multiple kilometres of untested strike between the Doradilla and Midway Targets and the Midway and 3KEL Targets will also be a priority area for future drilling. This is all aimed to advance the project quickly. This work will commence as soon as conditions will allow at Doradilla. The Midway Granite has been recognised as the source of the widespread mineralisation at Doradilla. In similar REE systems worldwide, the REE mineralisation has been found to be higher closer to the mineralising granite. As such, the Midway Granite may represent a significant source of REE and it is likely that still higher REE grades will be found proximal and possibly within the Midway Granite itself. Mapping from compiling field mapping with analysis of magnetic and radiometric data has successfully identified the area where the Midway Granite outcrops and where it appears that the Midway Granite may occur shallowly at depth. These areas will be a focus for SKY in the follow up program to evaluate and aim to expand the extensive REE mineralisation discovered to date at Doradilla. SKY has already commenced preliminary work on the nature and potential metallurgical pathways for the extraction of the REE mineralisation at Doradilla. REE mineralisation characterisation work will now be completed to begin investigating potential metallurgical pathways. A first pass trial of ammonium sulphate leaching at a solution pH of 4 by ANSTO for samples from only the Doradilla and 3KEL Deposits has been completed. The ammonium sulphate leaching testwork indicates that the REE mineralisation at 3KEL and Doradilla are not amenable to ammonium sulphate leaching and, therefore, are unlikely to represent ion-adsorption-clay-style REE mineralisation which is typically responsive to this metallurgical process. However, there has been no REE metallurgical testwork for the higher-grade results at Midway and further testwork is planned for the samples from the Doradilla and 3KEL Deposits to investigate other potential methods for extracting the REE mineralisation along with the other value metals including tin, copper, zinc, silver and indium.
