Viking Mines Limited (ASX: VKA) announced that the review of underground face sampling data revealed exceptionally high-grade results from multiple levels in the historic workings at its First Hit project near Kalgoorlie, WA.
VKA reported a number of results above 100 grams per tonne from multiple levels in the workings at the historic mine including 0.4m at 668g/t Au for 267 gram metres; 0.6m at 327g/t Au for 196 gram metres; 0.8m at 344g/t Au for 275 gram metres; and 0.3m at 1,056g/t Au for 317 gram metres.
The company said that the high-grade results provide valuable information on the distribution of nuggety gold which is important for drill targeting and targeting potential strike extensions. VKA said that the assessment of results and Diamond Drillhole planning is ongoing.
High-grade face sampling results
Viking Mines had recently commenced the historical data review and DD planning at its First Hit project in Western Australia. As part of the ongoing collation of data and digitising of historical mining records, all face sampling data collected from the underground workings at First Hit were reviewed in 3D.
The company announced that exceptionally high-grade face sampling results were identified amongst the extensive face sampling dataset.
Selected intervals of +100-gram metre (gm) un-cut intercepts (>5g/t cut-off) included 0.4m at 668.0 g/t Au for 267 gm (420S-009); 0.6m at 327.0 g/t Au for 196 gm (400N_003); 0.8m at 344.0 g/t Au for 275 gm (380S_010); 0.3m at 1,056.0 g/t Au for 317 gm (360S_004); 0.7m at 598.0 g/t Au for 419 gm (360S_007); 2.0m at 182.5 g/t Au for 365 gm (340X_001); 0.4m at 383.0 g/t Au for 153 gm (340N_032); 1.2m at 130.0 g/t Au for 156 gm (320S_011); 0.7m at 302.0 g/t Au for 211 gm (320N_003); 2.6m at 164.6 g/t Au for 428 gm (300S_018); 0.8m at 414.0 g/t Au for 331 gm (300S_028); 2.2m at 69.6 g/t Au for 153 gm (260S_017); and 2.1m at 56.0 g/t Au for 118 gm (220S_038).
Results highlight high-grade potential
The company said that the distribution and variability of the high-grade gold values demonstrate the nuggety nature of this mineralisation and the short-range variability.
VKA noted that this gold distribution is typical of narrow high-grade laminated vein deposits found in the Eastern Goldfields (like the Raleigh deposit operated by Northern Star) and is to be expected for this style of mineralisation.
The company said that this would be seen as an opportunity as previous sampling strategies may have been ineffective. VKA said that the results also reaffirm the importance of the Company’s strategy to drill larger diameter HQ core at the project, to accurately identify mineralised widths, and ensure effective sampling for the coarse gold.
Updates and next steps
The company said that data collection, interpretation, and planning are taking place focussing on capturing additional information off the face sheets to better understand the orebody.
VKA said that the assay data from the face samples are being used to guide and direct the drill hole planning by identifying areas where mineralisation remains open at the end of development drives to the North and South; determining where unmined mineralisation is present above and below high grade face sample data and requiring verification; geological modelling of mineralisation using the detail captured off the face sheets on rock type and vein morphology; and comparison of different historical data to see the impacts of different sampling methods (DD samples vs face Samples vs RC samples).
The company said that further work would include exploration programs designed to test the up dip, lateral and down dip extensions of the mineralisation at the First Hit deposit; and regional multielement geochemical programs to supplement the existing geochemistry, for which previous geophysical data is being obtained with a view to reprocessing the data.
Viking’s CEO Julian Woodcock said: “As part of the historical data review, we have now focussed our attention on the UG face samples collected during mining. These results have yielded some amazingly high grades at multiple levels across the historic workings.
The very significant values encountered, strongly support the high-grade potential of this system and give a better insight into the narrow vein, high grade style of mineralisation we can expect to encounter in the diamond drilling.”
* Image source: Viking Mines Limited