Underworld Resources Inc.
TSX VENTURE : UW

Underworld Resources Inc.

September 30, 2009 09:01 ET

Underworld's Initial Metallurgical Test Results Show Excellent Gold Recoveries

VANCOUVER, BRITISH COLUMBIA--(Marketwire - Sept. 30, 2009) - Underworld Resources Inc. (TSX VENTURE:UW) is pleased to announce that it 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 g/t Au were analyzed by bottle roll cyanide leach methodology. All samples returned an average 85.5% recovery, ranging from 65.7 to 93.7%. Samples included near-surface oxidized material, partially oxidized, and unoxidized material. Unoxidized and partially oxidized mineralization returned higher recoveries, averaging 87.7%, with oxidized mineralization averaging 73.6%. Additionally, higher grade individual samples, over 10 g/t Au, typically displayed slightly lower recoveries averaging 83.7%. 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 meters, averaging about 20 meters below surface. Local partial oxidation occurs near post-mineralization 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 Au were analyzed from the two styles of mineralization: graphite poor (WD09-39) and graphite rich (WD09-37). All samples averaged 51.2% recovery; however, gold mineralization without graphite averaged 81.7% recovery. The presence of 'preg-robbing' graphite resulted in poor recovery, averaging 4.6%. Graphite often occurs within sediment-hosted gold deposits, and can be removed using various metallurgical processes.

The Golden Saddle deposit is located 1,000 meters 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.

Underworld Resources is a well-structured junior exploration company focused on expanding its new gold discovery in the Yukon. For further information contact Jeff Sundar, Investor Relations at 604-684-4001.

ON BEHALF OF THE BOARD OF DIRECTORS

Adrian Fleming, President

Forward Looking Statement

Some of the statements contained in this press release are forward-looking statements. Forward-looking statements are not historical facts and are subject to a number of risks and uncertainties beyond the Company's control, including, but not exclusively, statements regarding potential mineralization, exploration results, completion of work program and studies, and future plans and objectives of the Company. Resource exploration, development and operations are highly speculative, characterized by a number of significant risks, which even a combination of careful evaluation, experience and knowledge may not eliminate, including, among other things, unprofitable efforts resulting not only from the failure to discover mineral resources but from finding mineral deposits which, though present, are insufficient in quantity and quality to return a profit from production.

The TSX Venture Exchange does not accept responsibility for the adequacy or accuracy of this release.

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