13th Feb 2007 07:02
Frontier Mining Ltd13 February 2007 Frontier Mining Ltd ("Frontier" or "the Company") Results of Exploration Programmes at Yubileiny, Beschoku and Baitemir Copper Prospects, Kazakhstan Frontier today provides an overview and update on the results to date of theexploration programmes in Kazakhstan which have been completed at the Yubileiny(copper), Beschoku (gold-copper) and the Baitemir (copper) prospects. The areafrom Beschoku to Yubileiny is termed the "Copper Trend" and has surface coppershowings over a strike length of over 20 kilometres. Baitemir is 25 kilometresnorth of Beschoku. Highlights of data compiled to date: Yubileiny: • A structurally controlled copper target with the potential for polymetallic silver-lead-copper mineralisation at depth• Mineralisation is now interpreted as being a low grade copper halo surrounded by high grade feeder zones• Wide chargeability anomaly identified and a large area still remains untested• Robust targets identified for reverse circulation ("RC") drilling programme in 2007• New Yubileiny, another area 1km from the Yubileiny prospect, will have field magnetic and induced polarisation ("IP") surveys commence this year Beschoku: • High grade gold-copper breccia pipe complex• Data indicates that drilling has only tested the periphery of a significant anomaly• Coincident surface showings of secondary copper• Data suggests a 20km mineralised trend between Beschoku and Yubileiny• Close spaced drilling required for further resource definition Baitemir: • Trenching programme intercepted significant mineralisation• Coincident moderate intensity chargeability and positive magnetic anomaly identified• Defined high grade areas which will form the basis of drilling targets for 2007 programme, targeting sulphide and oxide material Yubileiny The Yubileiny prospect is located approximately 20 kilometres to the southeastof Beschoku and was originally considered to be a volcanic massive sulphide-typetarget. Approximately 1,000 tonnes of copper were produced in the early 19thcentury from shallow pits and shafts in the oxide zone and initial explorationby Frontier focused on these areas. To date, in order to test for shallow oxidecopper, the Company has drilled 47 angled diamond drill holes, totalling 4,878metres (December 2005: 27 holes totaling 2,460m) over a strike length of onekilometre. Most of this drilling has targeted areas surrounding the historicworkings where SX-EW amenable high-grade oxide copper mineralisation is present(as previously reported in December 2005). The average depth of the holes wasjust over 100 metres and approximately 10 holes were scout reconnaissance holesdrilled in 2004. Significant intercepts are set out in Table 1 below. Table 1: Significant diamond drill core intercepts at the Yubileiny prospect.All holes are angled holes and reported intervals are drill hole lengths. HolesYB-02 to YB-17 were drilled in 2005. Holes YB38 to YB-44 were drilled in 2006. Drill Hole From (m) To (m) Interval (m) Cu (%) Ag (g/t)YB-02 18.0 23.0 5.0 0.85YB-03 37.3 55.3 18.0 0.49YB-09 145.5 151.9 6.4 1.1 11.3YB-11 45.0 72.3 27.3 0.78 16.7 45.0 54.8 9.8 1.76 20.2(incl.)YB-17 20.4 20.8 7.6 0.7YBC-38 0.0 20.0 20.0 0.55 3.1YBC-41 38.0 46.0 8.0 0.77 24.5YBC-44 82.0 108.0 26.0 0.38 3.8 Reinterpretation of the Yubileiny data, including re-logging of core by SRKExploration Services, has indicated that Yubileiny is a structurally controlledcopper target with the potential for polymetallic silver- lead-coppermineralisation at depth. Much of the primary copper mineralisation interceptedat Yubileiny occurs as pyrite-chalcopyrite filled fracture networks whosedistribution is part controlled by autobreccia units at the top of rhyoliticflows. This style of mineralisation is now interpreted as a lower grade copperhalo, but interceptions of significant intervals of oxide chalcocite, malachiteand azurite mineralisation indicate that this is surrounded with higher gradesteeply dipping feeder zones (e.g. 8.2 metres at 2.0% Cu and 23.1 g/t Ag in holeYB-11). Silver, lead and zinc grades increase at depth for peak intercepts of1.5 metres at 85 g/t Au, 1.5 metres at 2.7% Pb and 1.5 metres at 2.9% Zn. Induced polarisation and ground magnetic data indicate that the Yubileinyprospect is defined by a two kilometre long byRelated Shares:
FML.L