お知らせ • Sep 23
Dart Mining NL Report Encouraging Results from Preliminary Reconnaissance Sampling of the Mt Elmo Goldfield, Near Eskdale, in Northeast Victoria
Dart Mining NL report encouraging results from preliminary reconnaissance sampling of the Mt Elmo Goldfield, near Eskdale, in Northeast Victoria. Significant historic workings display multiple lines of silica-sulphide gold mineralisation across a significant strike length of more than 4 km, with workings indicating that mineralisation is open at depth and along strike. Dart Mining has recently undertaken some reconnaissance sampling on the Mt Elmo Goldfield to gauge indications of mineralisation style, extent, and grade. Preliminary results indicate narrow-vein mineralisation, repeated on multiple adjacent structures, and with good potential for stockwork mineralisation and wider, high-grade shoots. The combination of field mapping, sampling, and interpretation of airborne LiDAR mapping of the area has identified a series of parallel, north-northwest trending and steeply northeast dipping structures. Mineralisation is hosted by vein-style, silica-sulphide mineralisation, typically 0.3-0.6 m wide, although occasionally widening to >1m in width and forming steeply plunging shoots typical of Northeast Victorian orogenic gold systems. The Mt Elmo Goldfield appears to demonstrate remarkable continuity of mineralisation along significant strike lengths, and the addition of repeated, parallel structures suggests good potential for a viable exploration project. Although further exploration is needed, this project suggests good indications of width potential via the close proximity of multiple vein systems, and broader zones of stockworking associated with these veins. Additional shoots of high-grade gold mineralisation are indicated by historic records, which indicate notable volumes of high-grade ore (e.g., 123 tonnes @ 103 g/t from the Highland Chief, Upper Murray & Mitta Mitta Herald, 1903) and supported by chip samples at 38 g/t (70448), mullock grab samples of 64 g/t (sample 70454) and 202 g/t Au (Caluzzi, 1995). Two particularly long and continuous lines of workings, the Smythe & Willard and the Goodwin & Shea lines can be traced over a strike extent of 4.0 km, although the Premier Mine to the north, and the Redjacket and other associated workings to the south suggest that the strike extent of the mineralised system may extend over 8.5 km. Gold mineralisation is hosted in association with abundant pyrite and arsenopyrite, with the gold mineralisation itself hosted in gold tellurides, with minor lead and copper sulphides present (galena and covellite replacement of chalcopyrite; Graham & Masterton, 1987). Of the eleven reconnaissance samples collected across selected and accessible areas of the Mt Elmo Goldfield, all but one display encouraging gold mineralisation (>1 g/t Au), including 1m @ 7.0 g/t Au, 0.2m @ 38.3 g/t Au & 22 g/t Ag, 0.2m @ 13.5 g/t Au and a grab sample at 64.2 g/t Au (Figures 1 & 2). Sampling from the Victoria workings was completed along the backs every 50m down the drive, along with a mullock grab sample (69575). All chip samples from the Victoria workings include 0.2-0.3m wide laminated silica-sulphide mineralisation with abundant pyrite and arsenopyrite hosted within sheared argillite. Three short chip samples were collected from accessible portions of the Wizard Prince workings which included two samples of silica-sulphide mineralisation (70448, 70449) and one sample of altered sandstone displaying disseminated pyrite and jarosite. The remaining samples from the Highland Chief and Monarch workings (samples 70451-70454) are comprised of silica-sulphide mullock grab samples, including a 15cm grab sample from the Monarch workings which assayed at 64.2 g/t Au and displays visible calaverite. Detailed data processing and ongoing review of LiDAR and supplementary geospatial data collected across the Mt Elmo Goldfield by GeoCloud Analytics Ltd. has identified a significant number of previously unmapped historic mine sites and workings and has been able to resolve differences in the character of historic tin and gold workings enabling accurate, high-resolution mapping and drastically increasing efficiencies in the field. Additionally, LiDAR imagery has clearly identified drill access tracks and pads that were constructed by Stonewick Enterprises Ltd. in the late 1980's but never utilised.