MinRex Resources Ltd (ASX:MRR) has received high-grade gold results among encouraging multi-element results in rock samples gathered from the Bamboo Creek exploration licences of its East Pilbara tenements in Western Australia.
There were five prospect areas tested with 230 rock samples collected last month to follow-up previous successful sampling programs.
The most recent work returned assays of up to 22.9 g/t gold, 36 g/t silver, 18.5% copper, 0.20% chrome, 0.15% nickel, 0.12% lead and 0.28% zinc.
MinRex said the results built on very encouraging results from exploration in May-June 2018 and highlighted the prospectivity and potential of this remote project area near Marble Bar.
A field program in December 2017 recovered gold nuggets from the Marble Bar North tenement and assay results were announced for 10 rock samples collected from the Marble Bar South tenement in February 2018.
Geological map showing MinRex’s East Pilbara project areas.
An additional 190 rock samples, from all project areas - Marble Bar North and South, Daltons and Bamboo Creek - were subsequently collected in May 2018 with encouraging results announced in June 2018.
Third batch of samples collected
Following this, a detailed review of the results was carried out which led to the follow-up field exploration work completed in August.
The intention of these programs was to collect a large number of rock samples from the areas of old workings, prospects, anomalous areas, potential target areas and prospective geological zones and horizons in the East Pilbara project area.
In conjunction with metal detecting in selected areas, these samples were then subjected to multi-element analyses in order to discover the most prospective areas.
A large part of the focus of the most recent fieldwork was on the two exploration licences comprising the Bamboo Creek project.
This is a large project area, being several times the size of all of the other East Pilbara project areas combined.
Geological map of the Bamboo Creek project area.
The large area, remote location and under-explored history combine to make it ideal for more detailed study, sampling and field exploration.
Near historical mining centre
Bamboo Creek gold mining centre was discovered in the 1890s, before the finds at Marble Bar, and has been active, on and off, for more than 120 years.
This centre was historically one of the major gold producers in the Pilbara region, with more than 250,000 ounces of gold mined and recovered.
The nearby Spinifex Ridge molybdenum-copper porphyry deposit also contains a major JORC-compliant mineral resource of molybdenum and copper.
Further work planned
Once collated and analysed the recent results at Bamboo Creek will be followed up with new programs of metal-detecting, surface soil and rock sampling and geological mapping.
MinRex is also planning further similar work on all East Pilbara project licences.
Outcropping Warrawoona Group rocks in the northern portion of E45/4560.
The next phase will again incorporate visits to all four of the project areas around the Marble Bar area.
Further detailed rock sampling, soil sampling in colluvium and soil covered areas and detailed geological mapping will be utilised to better understand these complex gold, base metal and polymetallic mineralised systems.
This work will start in the near future, prior to the summer heat and rain, during the current field season in the Pilbara.