Alphamin Resources Corp is pleased to report further encouraging drill results from its new discovery, The Wedge, on its Bisie Tin Prospect (Bisie Project) in east central Democratic Republic of the Congo (DRC).
The Company has received results for a further 10 holes drilled at the Wedge as shown in Figure 1. Significant results include 18.4m @ 6.6% Sn from 122.6m in BGC092, 13.6m @ 5.15% Sn from 123m in BGC096, 16.65m @ 4.02% Sn from 121m in BGC099, 8.9m @ 6.02% Sn from 142m in BGC106, 14m @ 4.21% Sn from 125m including 4.45m @ 11.46% from 126.6 in BGC107 and 8.5m @ 5.69% Sn from 130.5m in BGC110. All results are shown in Table 1 and in Figures 2 and 3.
Results and visible cassiterite mineralisation have confirmed tin mineralisation extends over 200m strike with the vertical extent ranging between 200m in the north and 50m in the south of The Wedge target area. The near surface mineralisation identified in The Wedge is contiguous with mineralisation at Mpama North and lies immediately south of a north-east trending fault which displaced the zone of tin mineralisation to the east south of the fault. Further the up dip extent of the zone is truncated by a north-south trending sub-parallel fault at sub surface levels resulting in no surface expression.
Mineralisation identified in The Wedge will be considered in the next Mineral Resource estimate expected early in the third Quarter.
The Company has also commenced an infill drilling programme over Mpama North where a Mineral Resource estimate of 2.65 million tonnes @ 4.49% Sn for 119,240 tonnes contained tin (at 0.5% Sn cut-off) in the Indicated Category and 1.2 million tonnes @ 3.6% Sn for 42,800 tonnes contained tin (at 0.5% Sn cut-off) in the Inferred Category was announced on March 26th 2015. The drilling programme has been planned with the goal of upgrading Inferred Mineral Resources to the Indicated Category down to 500m below the 50m zone which has been sterilized by artisanal mining from surface.
Recent results shown in Table 1 and Figures 1 and 4 from the infill and extension drilling at depth at Mpama North include 11.5m @ 12.29% Sn from 304m in BGC062, 13m @ 1.15% Sn from 515m including 4.75m @ 2.68% Sn from 516m in BGC093 and 14m @ 2.57% Sn from 472m in BGC104. Results confirm tin mineralisation is contained within a high grade chute which plunges to the north and is open at depths below 600m from surface.
Results for both The Wedge and Mpama North continue to confirm exceptional tin grades and robustness of the Bisie Project.
Drilling intervals quoted are drill intercepts and are not true widths. True mineralisation width is approximately 70-80% of intersection length for all holes. The reported grades were determined using a cut-off grade of 0.1% Sn, 25g/t Ag, 1% Zn, 1% Pb and 0.1% Cu to select significant and anomalous intersections, with a maximum of 3m internal dilution being incorporated into the composite where appropriate. A top cut of 60% was applied to Sn, 30% to Zn and 20% to Pb.
Half core samples for all drillholes were submitted to accredited ALS Chemex laboratory in Johannesburg where samples were analyzed using ME-XRF05 conducted on a pressed pellet with 10% precision and an upper limit of 10 000ppm. Over limit samples were sent to Vancouver for ME-XRF10 which uses a Lithium Borate 50:50 flux with an upper detection limit of 60% and precision of 5%. ME-ICP61, HF, HNO3, HCL04 and HCL leach with ICP-AES finish was used for 33 elements including base metals. ME-OG62 a four acid digestion was used on ore grade samples for Pb, Zn, Cu & Ag. Industry accepted QA/QC checks were applied including use of duplicates, blanks and standards.
Planned drilling at Mpama South has been put on hold to allow both drill rigs with depth capability to first conclude the deep Mineral Resource infill drilling at Mpama North.
Soil sampling programmes have been completed over the full extent of the Bisie ridge with several highly significant coherent copper, arsenic, zinc and lead anomalies defined using the Niton XRF which extend up to the licence boundary in the southeast. Results are highly encouraging due to the association of tin and these elements. Anomalous samples will now be selected and sent to the laboratory for assay for tin.
These anomalies, together with the 2 kilometre tin in soil anomaly south of Mpama South, shown in Figure 5, will be followed up with auger drilling and sampling to better define diamond drill targets. This is in line with the Company's strategy of identifying new additional Mineral Resources within the Bisie Project area.