KINGMAN SAMPLES 688 g/t Au & 468 g/t Ag ON 100ft LEVEL OF ROSEBUD MINE OVER INTERVAL OF 0.18m
Figure 1 – Longitudinal section of the Rosebud Mine (Mohave Project) with underground sampling results and locations from first and second Burgex reconnaissance programs. All values are presented in Au (g/t)/Ag (g/t).
In late spring 2020, Burgex Mining Consultants (“Burgex”) were contracted to complete a second underground sampling program on the 100ft drift level and determine the accessibility, if any, of the 200ft and 250ft level drifts of the Rosebud Mine. During the prior program, Burgex was able to use ropes and ladders to assess the safety and stability of the main production shaft and lower themselves down to the 100-foot level of the abandoned mine. Below the 100ft level the shaft was blocked by debris and garbage, which Burgex was able to successfully clear during this second program to gain access to the 200ft level. Additional debris was blocking the shaft below the 200ft level preventing them from accessing the 250ft level.
The samples that Burgex collected were sent to ALS Laboratories in Reno, Nevada and were analyzed using the ALS method ME-GRA21 for gold and silver. This method is a fire assay method for optimal precious metal recovery. The ME-GRA21 method is described as "Au and Ag by fire assay and gravimetric finish ". This is what ALS recommends for the type samples from Rosebud.
|Kingman 2nd Phase Underground Sampling Results|
|Sample No.||Mine Level (ft)||Sample Type||Width (m)||Au (g/t)||Ag (g/t)|
|RB200-9||100 N Stope||Chip||?||0.80||17|
|RB200-10||100 N Stope||Chip||0.15||109.0||164|
|RB200-11||100 N Stope||Chip||0.18||688.0||468|
|RB200-12||100 N Stope||Chip||0.18||0.07||22|
|RB200-13||100 N Stope||Chip||0.28||70.5||93|
|RB200-14||100 N Stope||Chip||0.18||2.76||92|
|RB200-15||100 N Stope||Chip||0.41||0.51||15|
Table 1 – Results from 2nd Underground Sampling Program on Rosebud Mine on the 100ft and 200ft levels. Sampling completed by Burgex Mining Consultants on behalf of Kingman Minerals Inc.
The widths of the vein in Table 1 were reported in inches and were converted to meters by multiplying by 0.0254. Au and Ag averages in Table 1 were calculated using one half of the detection limits for sample results below detection, i. e., 0.025 g/t was used for Au samples below detection and 2.5 g/t was used for Ag samples below detection.
QA/QC procedures used for this second round of underground sampling included the use of two different Au/Ag standards and one blank standard prepared by MEG, Inc. of Reno, Nevada. These standards and blank were inserted into the sample batch with the rest of the Burgex 2nd round samples. Analytical results of the standards and blank were within their respective acceptable ranges.