HomeFeatures & AnalysisOrca Gold intercepts high grade mineralisation at Liseiwi Prospect, Block 14

Orca Gold intercepts high grade mineralisation at Liseiwi Prospect, Block 14

Sudan – Canada-based Africa focused explorer Orca Gold has made a new discovery on its Block 14 mineral licence in Sudan.

The focus of exploration in 2015 has been to identify and develop new targets that will add additional satellite resources to the Galat Sufar South (GSS) deposit.

Based on a successful trenching and channel sampling programme carried out in the second quarter of 2015 and first pass drilling at Prospect NE, a 5 000m reverse circulation (RC) drill campaign was commenced in mid-August to test four new prospects.

The Liseiwi Prospect, located 58km north east of GSS is the first prospect to be drilled in this drill campaign. Drilling is targeting channel sampling results from a large area of artisanal workings.

These channels returned a number of significant intercepts including 20m grading at 1.76g/t, 30m grading at 1.27g/t and 28m grading at 1.27g/t from the northern end of the workings and up to 38m grading at 6.51g/t (uncut) / 4.38g/t (cut to 10g/t) from a cross cutting high grade zone at the southern end of the workings.

To date, 11 RC holes have been completed in the first drilling campaign at Liseiwi.

Mineralisation at Liseiwi is contained within a fine grained andesite host with disseminated and vein pyrite and silicification over a strike length of 125m. The strike remains open in all directions.

The company expects further results in the next few weeks, however, with the success at this first Prospect a follow up program is being prepared, with the objective of increasing the Block 14 resource base.

Meanwhile, drilling at Prospect P, the second target of this current campaign, located 9km south of the GSS resource, will commence shortly. Trenching at Prospect P, over a strike length of 600m, returned values including 22m grading at 0.45g/t, 12m grading at 1.55g/t, 20m grading at 0.57g/t and 20m grading at 1.81g/t.

Mineralisation at Prospect P is hosted by a deformed, felsic dyke intruding carbonate sediments.

Resource additions at Orca Gold's Galat Sufar South
Resource additions at Orca Gold’s Galat Sufar South resource

The other two Prospects to be drilled in this campaign are Prospect M and Prospect NE, both located within 200 m of the main resource at GSS.

At Prospect M recent trenching has returned 42m grading at 1.64g/t and 18m grading at 2.46g/t. At Prospect NE first pass drilling in 2014 returned results of 19m grading at 6.04/3.91g/t and 18m grading at 3.32g/t.

“These first results from Liseiwi confirm our view of the potential for Block 14 to host numerous high grade deposits in addition to the current resources at GSS and Wadi Doum,” says Orca Gold President and CEO Hugh Stuart.

“We continue to be excited by the upside at Block 14, with new areas of artisanal activity being opened up and assessed by Orca geologists on an ongoing basis. We are also building a strong technical understanding of mineralisation controls towards identifying new targets outside of artisanal areas. We believe we have only scratched the surface at Block 14.”

Orca Gold has defined a mineral resource at GSS comprising an indicated resource of 26.4Mt grading at 1.77g/t for 1.50Moz of gold and an inferred resource of 8.7Mt grading at 1.7g/t for an additional 0.0.48Moz.

In addition, an initial resource has been defined at a satellite target Wadi Doum, 55km east of GSS comprising 1.30Mt grading at 3.02g/t for 0.13Moz of gold and an inferred resource of 1.63Mt grading at 2.2g/t for an additional 0.12Moz.

Chantelle Kotze
Chantelle Kotze is a Johannesburg-based media professional. She is a contributor at Mining Review Africa (Clarion Events - Africa) and has created content for the media brand over the past 6 years.