ECHOIQ LIMITED — Capital/Financing Update 2013

Oct 23, 2013

24 October 2013

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ASX ANNOUNCEMENT

Sentosa Starts Drilling at Darvii Naruu, Copper Gold Project

Sentosa Mining Ltd (ASX:SEO) advises that it has commenced reverse circulation drilling on its Darvii Naruu Copper Gold Project in Govi-Altai province, western Mongolia to test 4 of the 37 anomalies identified by the recent airborne geophysics survey conducted over the north western sector of the 62,735.8 Hectare Project. A 2,000 meter scout drilling programme is now under way at the highest priority targets comprising the Mushroom Reef, Mushroom East, Sulphide Creek and Anomaly 13 prospects. Supporting the prioritization of the drill targets is recent analysis of surface rock chip samples from field work completed in 2012; with gold grades of 10.8 g/t Au, 7.8 g/t Au and 1.2 g/t Au from float at Anomaly 10 (see Figure 1). Perth based Sentosa acquired a 100% interest in Darvi Naruu on October 1st and has since raised $1.14 million in an over-subscribed issue (placement), primarily to fund its first drilling on the project.

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Figure 1 Locality of prospects at Darvii Naruu

Level 4, 66 Kings Park Road, West Perth WA 6005 | PO Box 52, West Perth WA 6872 T (08) 6141 3500 | F (08) 6141 3599 | www.sentosamining.com

Mushroom Reef Prospect

This is a well defined target based on outcrop at surface with elevated gold grades peaking at 34 g/t Au. Two strong magnetic highs exist within a corridor identified by Southern Geoscience which is coincident with the surface expression of gold and copper mineralisation. Four holes will be drilled to a depth of 200 metres each to test the magnetic targets (see Figure 2).

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Figure 2 Circular magnetic highs coincident with outcropping quartz gold vein at Mushroom Reef. Four holes have been designed to test nature of magnetic anomalism.

Mushroom East Prospect

The copper and gold mineralisation of the Mushroom East prospect is associated with sub-parallel sheeted quartz veins within a mafic intrusion. These veins strike 030˚ and dip at 60˚ towards 120˚. The width of the laminated veins vary from are 0.25 to 1.0 metre. The mineralisation outcrops on the side of a hill, and is visible from a distance by its gossanous nature. The extent of the outcrop is approximately 75 metres, however malachite was observed in outcrop within a similar mafic intrusion 300 metres to the WNW of the system. The mineralogy of the veins is typically quartz + goethite ± malachite and azurite. The goethite has resulted from the weathering of insitu sulphides. Three holes for 330 metres have been designed to test the Mushroom East copper prospect at depth. High grade rock chips from outcrop up to 5.5% Cu exist at this location and recent analysis of rock chips collected in 2012 within the area returned grades of greater than 1% Cu (see Figure 3).

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Figure 3 Drilling has been designed at Mushroom East to test the outcropping copper rich quartz gossan veining.

Sulphide Creek Prospect

Further inspection on the ground is required at Sulphide Creek after Southern Geoscience identified a strong magnetic anomaly which is coincident with moderate level stream sediment sampling up to 398ppm nickel and 49ppm cobalt. These are not particularly high but the interest lies in a train of large boulders of fine grained variously serpentinised dunites and peridotites. These carry up to several percent fine grained disseminated sulphides and a number of specimens assay 0.5% to 0.6% nickel and 110ppm cobalt. In this area some stream sediments carry up to 13ppb Au. Petrological examination of the nickeliferous boulders suggests some of the sulphides are probably cumulate in origin and pentlandite has been recognized as discrete grains. The presence of nickel sulphides and the gold in the stream sediments suggests this area is prospective for PGEs as well as nickel.

Anomaly 13 Prospect

A large magnetic high with a peculiar circular magnetic low exists at Anomaly 13, and was identified in the review by Southern Geoscience. This magnetic anomaly has a partially overlapping potassic anomaly, K8. Stream sediment sampling identified this as an area of interest in 2008. Elevated nickel values in gossan from outcrop with values up to 0.6% Ni and a float sample grading 21% Cu, 2.1 g/t Au, 0.37% Pt and 0.37% Pd was found in this vicinity (see Figure 4). Further ground truthing will be completed at Anomaly 13 prior to drilling a hole at this priority target.

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Figure 4 Anomaly 13 is a high priority target. Further geological inspection will be undertaken prior to drilling.

For further information concerning Sentosa’s exploration plans for the future please contact Nigel Gellard, Executive Chairman.

Phone +61 (0)8 6141 3500 Fax +61 (0)8 6141 3599 www.sentosamining.com.au

Nigel Gellard EXECUTIVE CHAIRMAN

Competent Persons Statement

This news release was authorised by Mr Darryl Mapleson of BM Geological Services who is a Fellow of the Australian Institute of Mining and Metallurgy. Mr. Mapleson is a Principal Geologist and a full time employee of BM Geological Services. Mr Mapleson has sufficient experience which is relevant to the style of mineralisation and type of deposit under consideration to act as a competent person as defined in the 2012 edition of the “Australasian Code for reporting of Exploration results, Mineral Resources and Ore Reserves”.

About Sentosa Mining

Sentosa Mining Limited (ASX:SEO) is a Perth-based exploration company, focused on the Darvii Naruu Porphyry Copper Gold Project, located within the gold and copper rich South Gobi Arc. Since executing an agreement to acquire the Darvii-Naruu Project in April 2013 Sentosa has gathered and interpreted approximately 1,620 line kilometers of aeromagnetic and radiometric data focusing on the north western sector of the project. Sentosa has also commissioned an independent technical review of the geology and geochemistry of the project. As reported to the ASX on 10[th] September 2013, this work has confirmed the potential for large scale copper-gold, gold or nickel-copper gold PGE mineralised systems within the north Western sector of Darvii Naruu. Sentosa also has the Jaurdi Hills Gold Project on the Coolgardie Goldfield, Western Australia.

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