공시 • Nov 22
Besra Gold Inc Announces Exceptional High and Bonanza Grade Gold Intercepts at Bekajang
The Board of Besra Gold Inc. announced Exceptional high and bonanza grade gold intercepts at Bekajang. The Bau Gold Field corridor is located 30km - 40km from Kuching, the capital city of the State of Sarawak, Malaysia, at the western end of an arcuate metalliferous belt extending through the island of Borneo. In Kalimantan, the Indonesian jurisdiction portion of Borneo, this belt is associated with significant gold mining, including Kelian (7 Moz) and Mt Muro (3 Moz). The Bau Gold Field is defined by a gold mineralisation system covering approximately an 8km x 15km corridor, centred on the township of Bau. Within this corridor Besra has identified total Resources of 72.6Mt @ 1.4 g/t for 3.3 Moz of gold, within a number of discrete deposits, in addition to an Exploration Target ranging between 4.9 Moz and 9.3 Moz1 (on a 100% basis). The Bekajang Project lies along a very prospective trend that includes two historical mine sites. The Bukit Young Gold pit (BYG) was mined until September 1992, prior to the redevelopment of Tai Parit that, according to mine records, produced some 440,926 tonnes at a grade of 4.51 g/t Au. Tai Parit recorded production of some 700,000 oz of gold, of which approximately 213,000 oz @ 7 g/t was produced between 1991 and 1997 by Bukit Young Gold Mine Sdn Bhd, the last commercial operator in the region. Historical drilling provides the basis for a substantial JORC 2012 compliant Resource inventory at Bekajang, comprising: A Measured and Indicated Resource totalling 120.4 koz @ 2.0 g/t Au; An Inferred Resource of 524 koz @ 1.5 g/t Au; and An additional Exploration Target of 0.50 0.80 Moz @ 2.0 3.0 g/t Au, respectively. The 2021-2022 drilling program involved a total of 21 fully cored drill holes (BKDDH-12 to -30, inclusive), totalling 1,402m. Drilling was focused in two areas; the northern flank and southwest flank of the historical Bekajang tailings dam. The objective of this drilling program was to provide the first comprehensive cored drilling of three distinct mineralisation targets. Shale Limestone Contact (LSC) Targets. Historical drilling within the Bekajang Prospect involved mainly shallow RC holes (BKRC067 to 128), designed to delineate mineralisation hosted near the top of the Bau Limestone and in overlying surficial units (predominantly Pedawan Formation shales and mudstones, but also clay dominated lithologies of unspecified age, (Z lithologies), often intruded or replaced by dacite dykes. Typically, LSC mineralisation occurs within 5m-30m of the surface, and accordingly, most historical RC drilling terminated at depths shallower than 50m. Significant intercepts, illustrate this mineralisation to have thicknesses ranging from 2m (BKDH109) to 29m (BKRC071) with average gold grades between 2.0 g/t and 5.0 g/t, although locally anomalously higher gold grades had been encountered - such as 12.4m @ 10.4 g/t in DDH102-02 (which included a silicified interval of 1m @ 132 g/t). Historical assay data also revealed mineralisation along this trend to be characteristically polymetallic, with silver and base metal enrichment. For example, BKRC107 encountered 9m @ 60.0 g/t Ag from 9m depth, within an interval also containing 2.7% Zn and 3.1% Pb. This association of gold mineralisation with base and semi-precious metals at Bekajang is not observed at Jugan. The current fully cored BKDDH program provided the first comprehensive opportunity to relate the style and degree of hydrothermal alteration with the nature of the mineralisation in this area. The elongate trend of the Resource wireframe, sub-paralleling surface mapped NNW-SSE trending faults suggests that the stratigraphically controlled LSC mineralisation in this area may have an underlying structural foundation. Preferential dilatation along this trend may have played a role in facilitating upwelling of mineral charged hydrothermal fluids and the shallow LSC mineral endowment currently observed. Holes BKDDH-23, -27, -28, -29 & -30 were drilled to depths >100m in order to specifically assess deeper potential, should this be the operative mechanism for endowment. Mine records from BYG and Tai Parit clearly point to the bulk of their higher grades of gold mineralisation being associated with infill of karstic cavities within the Bau Limestone. Importantly, at both mines the mineralisation is predominantly oxidised and non-refractory, lending itself to more conventional leaching processes. Previous exploration to determine whether this style of mineralization extended across the southwestern flank of the Bekajang tailings dam had limited success, because the majority of holes were drilled using RC (reverse circulation), a method notoriously unreliable in settings having extensive cavity development and therefore non-returns to surface. Besra drilled three deep, fully cored, holes in the current program, BKDDH-24, -25 & -26, in an area where west-northwest fault trends, intersected by a northeast trending fault (parallel to the Krian Fault trend), was predicted to have facilitate enhanced hydrothermal fluid flow, and hopefully preferentially induced more intense karst development within the Bau Limestone. The current drilling results emphasise the highly variable nature of the tenor of gold mineralisation at the LSC level. Core analysis consistently shows higher gold tenor associated with more intensely altered host lithologies, typically found either at the LSC stratigraphic boundary itself or within the overlying Pedawan Formation, especially proximal to dyke intrusion and/or silica replacement. The results of the current program will greatly assist in increasing the understanding of those mechanisms responsible for local occurrences of very shallow high grade zones of gold mineralisation. The summary of historical and recent significant BKDDH drill results in the LSC mineralised zone, highlight typical background gold tenor in the range of 1.0 g/t - 3.0 g/t, punctuated by conspicuous locally developed, anomalously higher gold grades as reported at DDH102-02, (12.4m @ 10.4 g/t) and BKRC 103, (5m @ 9.72 g/t). Current drilling results for BKDDH-23 & -27 further highlight the presence of anomalously higher grades at this level. BKHHD-23 intercepted 8m @ 17.1 g/t, including a bonanza grade intercept of 103 g/t Au within the interval 20.0 to 20.8 m. As shown on Figure 4 the bulk of this high-grade mineralisation lies within a shallow (18m - 21m) shaley unit of the Pedawan Formation, which is bound by two thin intrusives. Prominent mineralisation also occurs within the top few metres of the Bau Limestone. BKDDH-27 also encountered high gold grades at the LSC level (9.7m @ 7.09g/t; including 0.9 m @ 39.3 g/t).