The deepest borehole drilled to date at its flagship Adumbi deposit, LADD016, intersected 25.59 metres grading 2.39 grammes per tonne (g/t) gold (including 6.09 metres grading 4.78 g/t Au) and 8.09 metres grading 1.90 g/t Au.
Mineralized sections for borehole LADD016 are summarised in the table below:
Borehole LADD016 had an inclination of minus 75 degrees and azimuth of 218 degrees at the start of hole and regular measurements of inclination and azimuth were taken at 30 metre intervals down the hole. All core was orientated, and it is estimated that the true widths of the mineralised sections are approximately 71% of the intersected width. All intercepted grades are uncut with maximum internal dilution equal to or less than 4 metres of intersected width.
Commenting on these latest drilling results, Loncor President Peter Cowley said:
“Borehole LADD016 is the deepest hole drilled to date at Adumbi with a depth of 640 metres below surface and on section, 300 metres below the shallower hole LADD013 which intersected 20.00 metres grading 4.21 g/t Au and 17.30 metres grading 2.48 g/t Au.
“In addition, this deep hole intersected the thickest Banded Ironstone (BIF) host rock sequence in all the holes drilled to date by Loncor and demonstrates that the BIF sequence is still continuing strongly at depth.”
Drilling is continuing at Adumbi with two drill rigs and is focusing on infill drilling within the inferred mineral resource open pit to generate indicated resources as well as below the pit to generate underground resources.
Drill cores for assaying were taken at a maximum of one-metre intervals and were cut with a diamond saw, with one-half of the core placed in sealed bags by Company geologists and sent to the Company’s on-site sample preparation facility.
The core samples were then crushed down to 80% passing minus 2 mm and split with one half of the sample up to 1.5 kg pulverized down to 90% passing 75 microns.
Approximately 150 grams of the pulverized sample was then sent to the SGS Laboratory in Mwanza, Tanzania (independent of the Company). Gold analyses were carried out on 50g aliquots by fire assay. In addition, check assays were also carried out by the screen fire assay method to verify high-grade sample assays obtained initially by fire assay.
As part of the Company’s QA/QC procedures, internationally recognized standards, blanks and duplicates were inserted into the sample batches prior to submitting to SGS Laboratory.