Osino Resources has discovered significant gold mineralization at the Eureka greenfields exploration project, approximately 35km northeast of the Company’s Ondundu Gold Project, Business Express understands.
Dave Underwood, Osino’s VP Exploration commented: “The Eureka license was identified in 2019 as part of a regional target generation exercise based on structure and geology. There has been no previous exploration in the area and there are no known local gold deposits. The license was initially explored using soil and rock chip sampling, which produced a gold anomaly at surface. The first two scout holes into the anomaly intersected wide zones of gold, including 29m @ 2.69g/t, from surface. These two holes were quickly followed up with a nine hole, step-out diamond drill program which again intersected gold in several holes including high grade shoots of 47m @ 5.92g/t and 18m @ 4.70g/t.”
He continued, “This greenfields discovery in an area of no known gold occurrences is testament once again to the target generation ability of the Osino team and the effective, systematic exploration our team is known for. The high-grade shoots intersected in holes ORD004, ORD005 and ORD006 are an exciting surprise, and unusual in the Namibian gold deposit context. The core is spectacular with numerous visible gold grains in a sulphide matrix breccia. We have just scratched the surface of this new gold project; the mineralization is open in all directions and there are several additional targets which remain to be drilled. We are very bullish about Eureka and what it could mean for the development of a new gold district, including Osino’s Ondundu project 35km to the southwest and WIA Gold’s recently discovered Kokoseb deposit a further 50km to the southwest.”
An Osino target generation exercise carried out in 2019 identified a significant bend in the Damaran stratigraphy between Ondundu, Khorixas and Outjo as being highly prospective. The most prospective ground was secured, and regional exploration work started in the area during 2020.
In 2022, as part of regional exploration, a 200 x 200m spaced soil sampling program was carried out over the lower Damaran stratigraphy on the Eureka licence, as well as rock chip sampling of surface mineralization. This initial program produced a gold in soil anomaly in the southern part of the Eureka licence, which measures 1000 x 500m. Mapping and additional rock chip sampling indicated gold mineralization within sandstones and shales, associated with alteration, quartz veining and gossanous seams at surface.
Towards the end of 2022, a scout drill program consisting of four Reverse Circulation (RC) holes was completed over the small area of outcropping mineralization, with all holes drilled towards the east.
During the first quarter of 2023, detailed structural mapping and rock chip sampling was carried out around the area of surface mineralization, to determine the potential structural setting and orientation of the mineralization, as well as the relationship between quartz veining and gold.
In May of 2023, a step-out Diamond Drilling (DD) program was initiated to follow the mineralization towards the southwest where it appears to plunge shallowly in that direction.
A total of nine step-out DD holes were drilled to the west, south and north of the two positive RC holes, at a collar spacing of approximately 100m. The holes were all drilled towards the east at an inclination of -600, planned for a depth of 200m but extended when in mineralization.
A complete set of intersections is provided in Table 1 below. At the date of this press release, assays had been received for seven holes with the remaining two holes expected over the next few weeks.
The gold is associated with massive sulphides (pyrrhotite, pyrite and chalcopyrite) adjacent to quartz veins. The massive sulphides often form the matrix of a breccia where the clasts are made up of fragments of vein quartz and country rock.
The gold mineralization appears to be coarse grained and nuggety which has resulted in the assay laboratory experiencing repeatability issues.
Orientation work is currently underway using metallic screen fire assay as an alternative to the standard fire assay, to see if this results in better repeatability and increases the assay grade. Metallic screen analysis uses a much larger assay sample size and screens out the larger fraction for separate assay.
Osino is a Canadian gold exploration and development company focused on the fast-tracked development of our wholly owned, Twin Hills Gold Project in central Namibia. Since its grassroots discovery by Osino in August 2019 the Company has completed more than 225,000m of drilling and has completed a suite of specialist technical studies culminating in the recently published Twin Hills DFS. The DFS describes a technically simple and economically robust open-pit gold operation with a 13-year mine life and average annual gold production of over 169koz per annum.
Osino has a commanding ground position of approximately 8,000km2 located within Namibia’s prospective Damara sedimentary mineral belt, mostly in proximity to and along strike of the producing Navachab and Otjikoto Gold Mines. The Company is actively exploring a range of gold prospects and targets along the belt by utilizing a portfolio approach geared towards discovery, targeting gold mineralization that fits the broad orogenic gold model.
Leave a Reply