September Drilling Update

Kefi Minerals plc 04 September 2007 AIM: KEFI 4TH September 2007 KEFI Minerals Plc ('KEFI Minerals' or the 'Company') DRILLING INTERCEPTS GOLD MINERALISATION AT DERININ TEPE PROSPECT KEFI Minerals is pleased to announce encouraging results from the initial drilling programme at the Company's 100%-owned Derinin Tepe Prospect in Balikesir province, western Turkey. Highlights • Gold-silver mineralisation intercepted in six of nine holes drilled. • Drillhole KDTD04 intercepted 3.6m at 3.35 g/t gold and 90 g/t silver from 38m downhole and 1m at 3.27 g/t Au and 327 g/t Ag from 44m down hole. • Drillholes KDTD 1 to 3 intersected backfill of ancient workings of up to 3-4m true widths. These workings were intersected at greater than expected depths, providing evidence of shoots of high-grade gold mineralisation in the epithermal quartz veins at Derinin Tepe. • Previous assays from channel-chip sampling and grab sampling undertaken by KEFI Minerals had returned up to 152g/t gold and 1,320g/t silver. Surface exploration undertaken by KEFI Minerals had identified gold-silver mineralisation in low-sulphidation epithermal quartz veins with cumulative strike lengths of over 2km and widths of up to 8m at surface. Extensive ancient workings were exposed in recent trenching, revealing 100-200m strike lengths of underground workings in the West, Central and East veins. Previous assays from channel-chip sampling and grab sampling undertaken by KEFI Minerals had returned up to 152g/t gold and 1,320g/t silver from these outcropping veins. Assays have now been received from a diamond drilling program comprising nine holes totalling 606m, which was designed to intersect the prospective quartz veins at a depth of 40m to 50m below surface. The first three drillholes (KDTD01-03) all intersected significant widths of 3-4m of mineralised backfill associated with ancient workings at the expected position of the epithermal quartz veins at depth. It is interpreted that the ancient miners backfilled the stopes to create greater stability for deeper underground mining. Some of the backfill is comprised of lower grade waste material as was intersected in KDTD01 where a backfilled zone contains 3.1m at 2.1g/t gold and 118g/t silver. Given that the ancient mining techniques required high gold grades in quartz veins for economic extraction, the significant lateral and vertical extent of the ancient workings attests to the potential of the epithermal quartz veins at Derinin Tepe to host shoots of high-grade gold mineralisation. The remaining drillholes all intersected epithermal quartz veins and associated quartz-vein stockwork zones. Drillhole KDTD04 returned the best intercept of the program with 3.6m at 3.35g/t gold and 90g/t silver from 38m downhole and 1m at 3.27 g/t gold and 327 g/t silver. Other intercepts included 1.7m at 2.0g/t gold and 72g/t silver in KDTD05. KEFI Minerals' Managing Director, Jeffery Rayner, commented: 'While Derinin Tepe was mined near surface in antiquity, this is the first time the area has been tested by modern drilling and exploration techniques. The association of gold and silver with epithermal quartz veins over significant distances provides encouragement that further exploration of Derinin Tepe is warranted. 'It appears that the ancient miners were able to follow high-grade shoots to greater depths than we anticipated which provides encouragement that further drilling may find other high-grade shoots along strike or at depth. Another drilling program that will include deeper holes is now being planned.' References in this announcement to exploration results and potential have been approved for release by Mr Jeff Rayner, B.Sc. (Honours). Mr Rayner is a geologist and has more than 20 years' relevant experience in the field of activity concerned. He is a member of The Australian Institute of Mining and Metallurgy (AUSIMM) and has consented to the inclusion of the material in the form and context in which it appears. Enquiries KEFI Minerals WH Ireland Bishopsgate Communications Jeffrey Rayner Laurie Beevers Maxine Barnes Katy Mitchell Nick Rome +905 36963 0111 +44 161 832 2174 +44 20 7562 3350 www.kefi-minerals.com Technical Summary The table below summarises the assay results from this initial drilling programme at Derinin Tepe. Hole Number From To Down Hole Interval (m) Gold Silver (m) (m) (g/t) (g/t) KDTD01 44.50 45.50 1.00 2.47 229 45.50 46.60 1.10 0.23 <0.50 46.60 47.60 1.00 3.74 137 KDTD02 64.40 65.15 0.55 4.33 16.1 KDTD03 16.00 17.00 1.00 1.92 120 58.40 58.95 0.55 3.47 54.7 KDTD04 35.95 37.10 1.15 1.01 8.7 37.10 38.00 0.90 0.01 1.7 38.00 39.00 1.00 4.29 86 39.00 39.70 0.70 4.63 29.8 39.70 40.60 0.90 1.75 13.1 40.60 41.60 1.00 2.97 205 44.00 45.00 1.00 3.27 327 KDTD05 42.00 43.00 1.00 2.61 89.5 43.00 43.70 0.70 1.04 46.7 KDTD06 No significant results KDTD07 No significant results KDTD08 No significant results KDTD09 29.30 30.30 1.00 1.96 3.10 Note: No top cut has been applied to gold/silver assay results. Intersections are based on a 1.00g/t gold cut-off grade with maximum internal waste of 1.0m. Weighted averages have been calculated for core recovery and gold/silver grades. Some of the above intercepts for KDTD01-03 are from sampling apparent backfill of ancient workings. The extent of the ancient backfill intercepted in these drillholes is interpreted to be: • KDTD01- 5.7m from 41.9m to 47.6m downhole • KDTD02 - 5.7m from 53.3m to 59.0m; and 5m from 61.0m to 66.0m downhole; and • KDTD03 - 4.4m from 46.1m to 50.5m downhole. These interpreted backfill zones comprise black soil with quartz-vein and silicified limestone fragments in the expected position of the epithermal quartz veins. The table below details the positioning and orientation of the drillholes. Hole Number Easting Northing Altitude Hole Depth Azimuth (UTM) Dip (ED50) (ED50) (m) (m) KDTD01 626100 4360679 1,178 57.25 47.9 -62.0 KDTD02 626057 4360702 1,167 71.50 49.2 -56.9 KDTD03 626027 4360745 1,154 75.00 51.0 -61.4 KDTD04 626439 4360410 1,189 59.20 26.3 -59.4 KDTD05 626663 4360422 1,236 56.60 28.5 -55.1 KDTD06 626633 4360484 1,227 57.00 54.1 -65.7 KDTD07 626608 4360500 1,240 85.00 221.6 -45.7 KDTD08 626163 4360620 1,182 60.00 42.9 -55.3 KDTD09 626711 4360358 1,202 84.80 44.8 -64.6 Sampling and Assaying Procedures Core recovery averaged 95% throughout the mineralised zone. Drill core samples of nominal 1.0m length were collected in accordance with accepted industry standards and procedures. The diamond drill core (HQ size 63.5 mm) was halved with a diamond blade saw and with chain of custody being observed for all samples. Sample preparation for all drill core samples was carried out at the ALS Chemex sample preparation facility in Izmir, Turkey. Analysis for gold by 50g Fire Assay was completed at the ALS Chemex laboratory in Alba, Romania. Analysis for base metal and indicator elements by ICP was completed at the ALS Chemex laboratory in Vancouver, Canada. Routine re-assaying of all samples assaying greater than 10g/t gold and 100g/t silver was also completed by ALS Chemex. The Company performed routine QA/QC analysis on the assay results through the use of certified reference materials, field duplicates, and blank samples in addition to the monitoring of internal laboratory check-analyses. The Company maintains an on-site core storage facility with an archive of half core samples. All core was photographed prior to cutting for future reference. Notes to Editors: KEFI Minerals was formed on 24 October 2006 for the purposes of holding EMED Mining's exploration interests in Turkey and Bulgaria with a view to creating shareholder value through the discovery and exploitation of gold and copper deposits. In November 2006, KEFI Minerals completed the acquisition of EMED Mining's Turkish and Bulgarian exploration interests through the acquisition of EMED Mining's subsidiary Mediterranean Minerals (Bulgaria) EOOD. In addition, KEFI Minerals acquired from EMED Mining a database of mining information relating to Turkey. KEFI Minerals commenced trading on AIM on 18 December 2006, following the successful placing of 46,666,667 shares at 3p to raise £1.4 million. In Turkey, KEFI Minerals has six exploration projects: 1. At Derinin Tepe in the Western Anatolia Region, epithermal quartz veins have been identified with gold and silver mineralisation. 2. At Artvin in northeastern Turkey, areas of extensive hydrothermal alteration have been recognised in the project area, and there is evidence of historical workings indicating potential for economic mineralisation. 3. At Gumushane in eastern Turkey, areas of extensive hydrothermal alteration have been recognised in the project area, as well as coincident areas of interest identified through interpretation of Aster data. 4. At Karalar, in Central Anatolia, highly anomalous gold in stream sediments have been identified in an area of historic base metal mines. 5. Muratdag, in Western Anatolia, is prospective for Carlin-style epithermal gold mineralisation. 6. Meyvali, in Western Anatolia, is prospective for epithermal and skarn related mineralisation. KEFI Minerals also has an extensive exploration database which contains information about approximately 100 further prospective sites in Turkey. This database provides the Company with a competitive advantage to identify prospective areas for project generation in Turkey. Monitoring of the exploration licence status of geologically prospective areas will be carried out on an ongoing basis so that KEFI Minerals can acquire further exploration opportunities as soon as they become available. EMED Mining has agreed to provide technical and administrative systems and personnel to KEFI Minerals on a cost-recovery basis, thus enabling KEFI Minerals to reduce overheads and spend more on exploring Turkey and Bulgaria. KEFI Minerals' Board of Directors is comprised of Mr. Harry Anagnostaras-Adams (Chairman), Mr. Jeffrey Rayner (Managing Director), Professor Ian Plimer (Deputy Chairman) and John Leach (Finance Director). Further information on KEFI Minerals is available at www.kefi-minerals.com and the Company's AIM code is 'KEFI'. -Ends- This information is provided by RNS The company news service from the London Stock Exchange
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