Underworld’s Metallurgical Tests Show Excellent Results


Underworld Resources Inc. has received non-optimized initial metallurgical testwork from the Golden Saddle and Arc gold deposits, at the White Gold property. These results returned excellent gold recoveries from the Golden Saddle zone.

At the Golden Saddle zone, a total of 23 samples from six 2008 drill holes averaging 6.60 grams per tonne (g/t) gold were analyzed by bottle roll cyanide leach methodology. All samples returned an average 85.5-per-cent recovery, ranging from 65.7 to 93.7 per cent. Samples included near-surface oxidized material, partially oxidized, and unoxidized material. Unoxidized and partially oxidized mineralization returned higher recoveries, averaging 87.7 per cent, with oxidized mineralization averaging 73.6 per cent. Additionally, higher-grade individual samples, over 10 g/t gold, typically displayed slightly lower recoveries averaging 83.7 per cent. This is potentially due to reduced leaching with coarse gold, which could possibly be amenable to gravity separation to boost recoveries.

Surface oxidation due to weathering at Golden Saddle ranges from 10 to 40 metres, averaging about 20 metres below surface. Local partial oxidation occurs near postmineralization fault zones. The majority of mineralization encountered to-date at Golden Saddle is unoxidized.

At the Arc zone, a total of 17 samples from two 2009 drill holes averaging 2.05 g/t gold were analyzed from the two styles of mineralization: graphite poor (WD09-39) and graphite rich (WD09-37). All samples averaged 51.2-per-cent recovery, however, gold mineralization without graphite averaged 81.7-per-cent recovery. The presence of preg-robbing graphite resulted in poor recovery, averaging 4.6 per cent. Graphite often occurs within sediment-hosted gold deposits, and can be removed using various metallurgical processes.

The Golden Saddle deposit is located 1,000 metres north of the Arc Deposit. The two deposits display different styles of gold mineralization, geochemistry and host rocks. Golden Saddle occurs within metavolcanic and intrusive rocks, with gold mineralization associated with pyrite veining, silicification, quartz breccias and stockworks, whereas the Arc Deposit is hosted with metasedimentary rocks, and is typified by hydrothermal breccias and silicification.

The different styles of mineralization and gold recoveries at Golden Saddle and Arc are due to varying host rock lithologies. The principal host rock at Golden Saddle was a granitoid that has been metamorphosed to an augen gneiss. Arc mineralisation is hosted by sediments which now outcrop as quartzite.

Underworld has initiated an optimized metallurgical testing program with Inspectorate PRA Metallurgical Division of Richmond BC, with results expected during the latter part 2009. Samples from the multiple styles of mineralization at the White Gold Property will be analyzed for cyanide leach, gravity recovery and Bond Work Index. Optimization studies such as gravity recovery have the potential to boost overall metallurgical recoveries.
Underworld is currently awaiting assay results from an additional 32 holes at the White Gold Project. At Golden Saddle, Mineralization remains open to expansion along strike to the northeast and at depth.

Quality Assurance

Underworld has implemented a rigorous QA/QC program at the White Gold Property using best industry practice. Elements of the program include: chain of custody of samples, insertion of standard and blank samples, and check assays. Drill core is sawn in half and shipped in sealed bags to ALS Chemex Laboratories in Vancouver, B.C. Check assays are being undertaken by Acme Laboratories, Vancouver. Bottle Roll cyanide-leach analysis from the 2008 samples were performed by Alaska Assay Labs in Fairbanks, AK, and for 2009 samples by ALS Chemex Laboratories in Vancouver, B.C.

The ongoing 2009 Exploration Program is directed by Adrian Fleming, M.A.I.G, RPGeo, M.Aus.I.M.M., President of Underworld Resources and a Qualified Person as defined by NI 43-101. Mr. Fleming prepared, and approves of the content of this release.

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