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Eagle Drilling installing the surface casing at Twin Peaks West. Source: Greenvale Mining
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  • Greenvale Mining (GRV) completes a second diamond hole at the Georgina Basin iron oxide copper-gold (IOCG) project in the Northern Territory
  • The hole aimed to test a magnetic-gravity anomaly at the Twin Peaks prospect and successfully intersected basement rocks at 680 metres downhole
  • Greenvale says the strongly altered sedimentary rocks and breccias, also encountered in the first hole, are consistent with IOCG systems in the Tennant Creek region
  • Greenvale plans to conduct downhole geophysical survey work early next year to refine the magnetic anomaly and is also waiting on gold and multi-element assays
  • Company shares last traded at 31.5 cents on December 20

Greenvale Mining (GRV) has completed a second diamond hole at the Georgina Basin iron oxide copper-gold (IOCG) project in the Northern Territory’s East Tennant Creek area.

KNRDD004 was drilled to test the prominent eastern magnetic-gravity anomaly at the Twin Peaks IOCG prospect.

The hole intersected basement rocks at roughly 680 metres downhole which comprised hematite and chlorite altered metasedimentary rocks and breccias. Originally, it was planned to be drilled to a 750-metre depth but the nature of alteration led the company to extend the final depth to just shy of 901 metres.

Notably, the alteration present in the second drill hole is reportedly similar to that encountered in the first hole which intersected prospective veining and visible copper in the core from 720 metres down-hole.

Greenvale said the intersection of ‘strongly altered’ rocks, with brecciation and widespread hematite mineralisation suggests both Twin Peaks east and west are the result of iron oxide-bearing hydrothermal systems.

The company believes the presence of iron oxide minerals is significant because, in ‘Tennant Creek-style’ deposits, iron oxides are formed prior to late gold-bearing fluids passing through the ironstone which deposits gold in the iron oxide minerals.

Together with the first hole, the company has drilled nearly 1700 metres as part of its maiden drilling program at the Georgina project.

Greenvale plans to conduct downhole geophysical survey work early next year to refine the magnetic anomaly and determine whether the most magnetic part of the target has been tested.

Selected drill core has been sent to the lab for sample preparation, fire assay gold and multi-element analysis and results are expected over January and February next year.

Company shares last traded at 31.5 cents on December 20.

GRV by the numbers
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