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Projects |
Yamarna Gold
(100% interest subject to separate royalty agreements on some tenements). The Yamarna Project is located about 140km east of Laverton on the eastern edge of the Yilgarn Craton. Since Eleckra Mines listed and on the ASX in July 2006 the Company completed two RC, as well as two RAB and Aircore drilling programs at Yamarna during the 2006 - 2007 financial year spending a significant $2.2m on exploration. The Company has obtained excellent drilling results extending the gold mineralisation along strike both to the north and south around its existing 740,000 oz Au resource base at Attila and Alaric. The Attila resource is being remodeled to incorporate results of this years drilling. Highlights - Last 12 Months Drilling
A RAB drilling program at the KHAN NORTH prospect produced an intersection of 4m at 6.5 g/t Au from 22m and 4m at 2.04 g/t Au from 6m. At the same time some exciting new gold targets have been generated, with a hit of 2m at 10.3 g/t Au at the RENEGADE prospect. At the AUGUSTA gold prospect drilling reported a best result of 12m at 1.24 g/t Au from 27m, subsequent infill RAB drilling at this prospect confirmed gold anomalism over a 4.8km strike length with peak gold values including 1m at 12 g/t Au and 15m at 0.5 g/t Au. Project ReviewYamarna has the defined Attila - Alaric gold resources occurring within a regional scale mineralised gold trend termed the Yamarna shear zone. The presence of a major deep-crustal shear zone and associated complex structural corridor is considered to have positive implications for the formation of major gold deposits. Much of the Archaean bedrock at Yamarna is obscured by a thin veneer of windblown sand and Permian sediments. Whilst making exploration challenging, the cover and isolation has resulted in Yamarna being one of the most under-explored greenstone belts in WA. The Company believes there is significant scope to discover more gold mineralisation at Yamarna given the lack of intensive historical exploration activity. The Company has assembled a substantial regional tenement package that allows exploration in the belt for the first time to be approached in a systematic manner. In its first year at Yamarna a number of advanced to grass roots gold targets have been tested with some success, but there remain many that still require a first pass test and many which warrant further drilling to determine their significance. The discovery of the potentially multi-million ounce gold deposits beneath transported cover at Tropicana 100km to the south of Yamarna highlights the potential existing in this poorly explored region on the margin of the Yilgarn. New exploration license applications were lodged, targeting gold over interpreted southern extensions of the Yamarna fault zones, between Yamarna and the Tropicana gold deposits. Yamarna Resources
Yamarna Mineral Resource Summary
Attila / Alaric / Khan North - Gold metallurgical test work returns excellent results, with recoveries from 21 composite samples from four deposits varying between 87.3% - 98.0% with an average of 93.5%. Summary of 24-Hour Bottle Roll Metallurgical Test
The results from the bottle rolls show very good gold recoveries from all four deposits and from all weathering profiles. The recoveries vary from 87.3% to 98.0% with an average of 93.5%. These results are encouraging and support the results of earlier metallurgical test work. Yamarna Significant Gold Results
Yamarna Regional TargetsWithin its tenement holding, outside of the Attila - Alaric area, the Company has a suite of gold targets, ranging from conceptual ones to early stage prospects with some surface and RAB geochemical anomalism, as well as advanced prospects with ore grade intersections. RAB, Aircore and RC drilling programs were implemented at several of these prospects during the year. Targets tested included Khan North, Breelya, Fuel Dump and Augusta, Central Bore, Tobin Hill and Wanderrie. Khan North
The Khan North prospect located 25km north of the Attila deposit was discovered during reconnaissance RAB drilling in 2003. Previous RC drilling included intersections of 37m (6m true width) at 8.2 g/t Au, 3m at 17.9 g/t Au and 2m at 11.8 g/t Au. The gold mineralisation occurs in a sheared quartz porphyry unit, which is a different host rock to that hosting the Attila-Alaric deposits. RAB drilling carried out by the Company over a strike length of 4km across the interpreted position of the porphyry returned several anomalous zones. The first phase of the Company's RC drilling at Khan North, totaling 14 holes for 994m was drilled below several of these RAB anomalies. The best intercept was from line 37200N located 800m north of the Khan North deposit. This new prospect, called Renegade, returned 2m at 10.3 g/t Au and 3m at 3.87 g/t Au in EYRC055 from what is believed to be the same quartz porphyry unit which hosts the mineralisation at Khan North. These intersections are open down dip and along strike and will be followed up with additional drilling in due course. BreelyaBreelya is located 45km along strike to the southeast of Attila within the Yamarna shear zone. Previous RC drilling by WMC within an anomalous zone 6km in strike length returned best intersections of 8m at 8.9 g/t Au (including 2m at 31.9 g/t Au) with follow-up along lines up to 400m apart that returned intercepts of 2m at 4.2 g/t Au and 2m at 1.74 g/t Au. The mineralisation is associated with a zone of extensive quartz-sericite-pyrite alteration of porphyry and dolerite. Six RC holes were drilled on lines 100m either side of the high grade intercept in order to determine the extent and orientation of the mineralised zones. The drilling confirmed that broad low-grade and narrow higher-grade gold mineralisation is shear zone hosted, with mineralisation located along the contact of a northwest trending silicified granite porphyry and dolerite. The best result was 1m at 3.4 g/t Au. Further work will involve locating the focus of the mineralisation within this broad zone of alteration and mineralisation. Fuel DumpFuel Dump is located 3km south of Breelya within sheared mafic rocks. The one RC hole drilled at the Fuel Dump prospect (EYRC065) confirmed the potential of the prospect intersecting 1m at 1.5 g/t Au, 1m at 2.45 g/t Au and 1m at 3.55 g/t Au. With the southerly strike extensions untested, the prospect is highly prospective. An associated surface gold-in-laterite geochemical anomaly could be a useful guide for further exploration within the prospect. AugustaThe Augusta prospect is located 15km south of Breelya on a structurally complex section of the Yamarna shear zone. Aircore holes drilled by previous explorers on 200m centres on lines 800m apart returned a number of interesting results including 19m at 0.3 g/t Au, and 10m at 0.35 g/t Au. The Company completed some infill RAB drilling which confirmed the anomaly over a 4.8km strike length, returning results of up to 1m at 12g/t Au and 15m at 0.5 g/t Au. Three RC holes on two lines 800m apart were drilled to test deeper bedrock mineralisation. The holes intercepted narrow zones of +1 g/t Au mineralisation within broad zones of low-grade mineralisation and alteration. Mineralisation is predominantly hosted within a variable sheared gabbro / amphibolite with magnetite-carbonate ±pyrite alteration coincident with mineralisation. This alteration may prove to be a useful geophysical and geochemical tool for further exploration, especially to the east where the same stratigraphic unit is untested. Augusta is an extensive altered and mineralised zone which requires further testing. Golden SandsThe discovery of the potentially multi-million ounce gold deposits beneath transported cover at Tropicana 100km to the south of Yamarna highlighted the potential existing in this poorly explored region on the margin of the Yilgarn. Eleckra has lodged new exploration license applications over the unexplored interpreted southern extensions of the Yamarna fault zones, targeting potential gold occurrences between Yamarna and the Tropicana gold deposits Previous (pre Eleckra) limited exploratory RAB drilling in the very north-west of the Golden Sands project area confirmed the presence of gold within this part of the Yamarna shear zone. Significant RAB intercepts were 4m at 0.18 g/t Au and 1m at 0.245 g/t Au. These results warrant further drilling at this locality along with reconnaissance geochemical sampling of the Golden Sands project area, to be implemented after the granting of the tenements.
Other Significant Prospects Within the Yamarna Project Requiring Further Exploration:
Numerous other anomalous occurrences have been documented within the Yamarna Project, either by surface sampling or shallow drilling, all requiring future follow up. |
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