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Rubianna Resources uncovers anomalous base metals in the Murchison

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Rubianna Resources (ASX: RRE) has discovered anomalous base metals at depth in a maiden reverse circulation drilling program at the Killara Project, within its Murchison tenements in Western Australia.

Importantly, the positive results support the company’s conceptual model for the project.

Drilling comprised eight reverse circulation drill holes for 1,422 metres, designed to evaluate previously returned surface geochemistry and ground geophysical anomalies.

Elevated multi-element geochemical horizons have been intersected within drilling of all the principal drill targets which support the interpretation for the potential of sedimentary hosted (SEDEX) mineralisation within the project area.

The presence of abundant, sulphidic, black carbonaceous shales are interpreted to explain the broad electromagnetic (EM) conductor targets, indicating that EM is potentially not suitable for evaluating further targets in this area.

Further assessment of the along-strike potential was undertaken with rock chip results returning anomalous base and pathfinder elements.

Rock chip sampling and mapping show potential for a minimum of more than 25 kilometres of anomalous horizons along strike, and a minimum of at least three sub-parallel horizons in this area.

Rubianna is exploring for a deposit with the main mineralised target zone potentially in the order of 200 to 300 metres long.


Drilling results


A number of holes drilled to test geochemical target #3 and EM conductors A & B intersected a moderate southerly dipping horizon, about 44 metres thick, with anomalous copper (>200ppm), lead (>40ppm), silver (>1ppm) ± arsenic (>40ppm) and molybdenum (>4ppm).

An underlying zone of coincident anomalous zinc (>200 ppm) was also discovered.

A near surface, lateral zone of elevated base and pathfinder anomalism coincident with the zone of identified soil anomalism has been intersected where the anomalous horizon is projected to the surface.

A single drill hole completed to evaluate geochemical target #2 and EM conductor C, intersected near surface, elevated base and pathfinder elements which are interpreted to be associated with the strike extension of the horizon identified from the drilling at geochemical target #2.

Drilling of conductor D – which has no surface geochemical response due to an interpreted transported laterite cover – intersected a 12 metre thick zone of anomalous copper (>200ppm), lead (>60ppm), silver (>1ppm) ± arsenic (>40ppm) and molybdenum (>10ppm).

This hole also discovered an underlying discrete (4 metre) intercept of 880ppm zinc, potentially associated with another horizon to the south of the elevated horizon identified by the drilling at geochemical target #3.

Rubianna is reviewing all of its geochemical targets in this area.

The company held around A$1.1 million in cash at the end of the March 2013 quarter.


Proactive Investors Australia is the market leader in producing news, articles and research reports on ASX “Small and Mid-cap” stocks with distribution in Australia, UK, North America and Hong Kong / China.

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