Osino Resources Corp. has announced a new discovery of new shallow zones of gold mineralization at Twin Hills West (“THW”), just 3km from the main mineral resource at Bulge and Twin Hills Central (“THC”).
This follows an initial drilling of twelve diamond and RC holes in the area in 2019. Osino followed this up with 54 additional holes drilled since March 2021. The program comprised a first-pass exploration diamond drill campaign and follow-up RC drilling which is ongoing.
The program identified three new coherent zones of mineralization. The mineralization is currently being defined at a 50 x 50m drill spacing with the aim of adding inferred ounces to the next Twin Hills mineral resource estimate, scheduled to be released at the end of Q1 2022.
Discovery of mineralization
“Gold mineralization at THW has taken quite a while to reveal itself since the initial bedrock sampling in 2019. The latest round of diamond drilling has led to the discovery of mineralization in three steeply dipping parallel zones within meta-greywacke. The style of mineralization and structural controls appear similar to those at the rest of Twin Hills and Clouds East in particular. This latest discovery has the potential to add significant value to the Twin Hills project, as it lies only 3km from the main mineral resource and is located along trend to the west, within the planned Twin Hills mining license boundary. Additional RC drill rigs have been added to the fleet to ensure that the areas of best mineralization are drilled out at 50 x 50m before the year end and the THW ounces added to the next resource update,” David Underwood, Osino’s VP Exploration commented.
Osino controls a consolidated district-scale land package which has so far yielded four significant gold discoveries. Scout drilling at Terminal One, 1,500m to the west of THW, has also intersected narrow zones of mineralization indicating the potential in that direction. The exploration and resource drilling is ongoing across the district, with the aim of growing the existing mineral resources and making new discoveries.
THW was first identified in the calcrete sampling program of 2018 as a low-level anomaly along a secondary structure south of the Karibib Fault, coincident with a magnetic anomaly. In 2019, a total of 111 vertical RAB holes in three fence lines were drilled over THW to sample bedrock beneath the calcrete cover, which is generally between 15-40m thick in this area.
These bedrock samples produced several anomalous assays with a best result of 2.68g/t over 1m. In 2019 a total of 12 diamond holes were drilled over the central part of THW with the best hole returning 16m @ 1.38g/t (OKD037). At that time the drilling was stopped at THW to focus on the large-scale discoveries made at Bulge and THC.
A short program of 7 holes was completed at THW early in 2021 as part of the brownfields exploration initiative which returned another significant hole from the central portion (OKD175 – 32m @ 1.06 g/t incl. 12m @ 1.93g/t). Following an updated structural study and remodeling of the magnetics, it became clear that THW was divided into three portions, cut by NNW faults which were later infiltrated by mafic dykes.
A diamond drill program was initiated in March 2021 to test the three lobes of the THW deposit named Eland, Oryx and Kudu. A total of 28 holes for 5,862m were completed in August and assays indicated two mineralized zones at Oryx and one at Kudu all striking ENE and plunging to the NE.
Significant results include OKD175 – 32m @ 1.06g/t (116-148m) incl. 12m @ 1.93g/t, OKD287 – 32m @ 1.04g/t (100-134m) incl. 6m @ 2.60g/t and 4m @ 3.28g/t and OKD311 – 44m @ 1.07g/t (100-144m) incl. 32m @ 1.15g/t. The Eland lobe has not produced any anomalous assays to date. A table of intercepts for all THW drill assays received to date.
Sample assay results
Initial structural readings from drill core indicate that the shears and veins hosting the mineralization strike northeast and plunge in the same direction, somewhat oblique to the east – west bedding. The mineralized shoots are focused around parasitic fold noses accompanied by quartz-sulphide veinlets with secondary biotite selvages.
All Osino sample assay results have been independently monitored through a quality assurance / quality control (“QA/QC”) program including the insertion of blind standards, blanks and duplicate samples. QA/QC samples make up 10% of all samples submitted.
Logging and sampling is completed at Osino’s secure facility located in Omaruru, Namibia, near the Twin Hills Gold Project. Drill core is sawn in half on site and half drill-core samples are securely transported to the Activation Laboratories Ltd. sample prep facility in Windhoek, Namibia.