Cornish Metals has reported findings of 10.33% tin at depths of between 974.20 metres and 976.80m, including 39.60% tin from 975.77m, at South Crofty mine in Cornwall.
The figures were released today in the company’s final set of assay results from its recently completed diamond drilling programme.
Cornish Metals drilled hole SDD20-001 and two wedged daughter holes (-001A and -001B) and successfully tested multiple tin-bearing vein-like structures (lodes) in the central section of South Crofty Mine.
Hole SDD20-001B intersected high-grade tin mineralisation in the No. 4 Lode, recording 2.60m grading 10.33% tin between 974.20m and 976.80m, including 0.46m grading 39.60% tin from 975.77m.
High-grade mineralisation was also intersected below historic workings of the No. 1 and No. 8 Lodes.
Five new lodes were encountered in historically un-mined areas, highlighting the underexplored nature of the South Crofty mine area.
| Hole ID | Lode Name | From (m) | To (m) | Width (m) | True Width (m) | Grade (Sn %) | Grade (W %) |
| SDD20-001 | No. 1 Lode | 788.87 | 789.89 | 1.02 | 0.72 | 1.87 | |
| New lode in footwall of No. 1 Lode | 810.59 | 811.15 | 0.56 | 0.40 | 1.08 | ||
| SDD20-001A | New unnamed lode 1 | 826.07 | 826.58 | 0.51 | 0.44 | 1.51 | |
| New unnamed lode 2 | 856.13 | 856.56 | 0.43 | 0.37 | 1.12 | ||
| New unnamed lode 3 | 949.58 | 950.68 | 1.38 | 0.76 | 0.26 | ||
| Including | 950.34 | 950.68 | 0.34 | 0.19 | 1.07 | ||
| No. 4 Lode | 976.52 | 977.82 | 1.30 | 1.27 | 0.39 | ||
| Including | 976.52 | 976.87 | 0.35 | 0.34 | 1.06 | ||
| No. 8 Lode | 1,028.76 | 1,029.96 | 1.20 | 1.19 | 0.92 | ||
| Including | 1,029.10 | 1,029.48 | 0.38 | 0.38 | 2.77 | ||
| SDD20-001B | No. 4 Lode | 974.20 | 976.80 | 2.60 | 2.60 | 10.33 | |
| Including | 975.38 | 975.77 | 0.39 | 0.39 | 19.45 | ||
| And | 975.77 | 976.23 | 0.46 | 0.46 | 39.60 | ||
| New lode in footwall of No.4 Lode | 993.80 | 996.06 | 2.26 | 2.25 | 1.26 | ||
| No. 8 Lode | 1,034.38 | 1,035.59 | 1.21 | 1.16 | 1.78 | ||
| Including | 1,034.38 | 1,035.21 | 0.83 | 0.80 | 2.48 |
In September, Cornish Metals reported a high-grade intersection of 2.19% tin more than 100 metres below any historic mining at South Crofty mine in Cornwall. (bit.ly/3lnLuAd)
Company chief executive Richard Williams said that the 2020 drill programme at South Crofty had achieved its two primary objectives.
“Results returned from each of the No. 1, No. 4, No. 8 and intermediate lodes have confirmed the high-grade nature and persistence of the known mineralised structures within South Crofty.
“Equally important, this proof of concept programme has confirmed the suitability of directional and wedge drilling to safely intersect multiple lodes from a single surface or underground drill hole as a means to undertake resource definition drilling and a path to completion of a feasibility study.
“A third, pleasant surprise of the programme has been the discovery of five new mineralised lodes between, and adjacent to, historically mined lodes.
“When combined with our recently reported discovery of high-grade copper-tin mineralisation at the nearby United Downs project, the presence of many new, previously un-recorded mineralised structures, in areas with little or no past drilling, once again demonstrates the exploration potential at both South Crofty and Cornish Metals’ extensive tenure holdings across Cornwall.”