공시 • Jun 15
Meteoric Resources Nl Announces Significant Increase in Juruena Resource
Meteoric Resources NL updated Mineral Resource Estimate for the Juruena Project, comprising gold mineralisation from the adjacent Dona Maria, Querosene and Crentes deposits. The updated Global Mineral Resource now stands at 1.9Mt @ 6.3 g/t Au for 387,000 ounces of gold, an increase of 50% over the previous resource. The updated Mineral Resource includes deposits at Querosene, Crentes and Dona Maria. The stated Mineral Resource for Querosene is a re-statement of the 2016 resource estimate announced by Crusader Resources Limited (now Big River Gold Limited, ASX: BRV). Insufficient work has been completed to warrant updating the Mineral Resource. A summary of the material information used to estimate the 2016 Mineral Resource is detailed in the Crusader ASX announcement dated 22/12/2016. The Company confirms that all material assumptions and technical parameters underpinning the estimate continue to apply and have not materially changed. The Mineral Resource for Crentes consists of two (2) models: a restatement of the eastern portion of the 2015 Crentes Mineral Resource (Crentes East), and an updated Mineral Resource of the western portion (Crentes West) which includes an additional ten (10) diamond drill holes. The updated Mineral Resource for Dona Maria includes an additional twenty-one (21) diamond drill holes since 2016. Drilling was carried out between 1996 - 2020 by various companies. Diamond drilling utilised industry standard conventional wireline technology with a mixture of HQ and NQ core size. RC drilling generally used a 5 ½ inch face sampling hammer and the rigs utilised a compressor with auxiliary booster. Drill-hole inclinations ranged from -40 degrees to -80 degrees at various azimuths. More than half of the drillholes were oriented and downhole surveys were completed using a variety of single shot, multi-shot and continuous reading tools. In 2019 and 2020, Meteoric drilled 37 diamond drill-holes (8,695.4m) of NQ2 diameter with HQ pre-collars at the Dona Maria, Crentes, Querosene, Uiliam and Tatu prospects. In 2016, Crusader drilled 64 diamond drill-holes (7,873m) of NQ2 diameter with HQ pre-collars at the Querosene,Dona Maria and Tatu prospects. Primarily targeting the Querosene, Dona Maria and Crentes zones, Crusader completed 71 RC drill-holes in 2014 and 2015 (7,452m) using a nominal 5 ½ inch face sampling hammer. In early 2015 Crusader also completed 11 diamond drill-holes (1,863.81m) of NQ2 diameter with HQ pre-collars and 2 trenches for 17m. Historically, over the wider Juruena project area, Lago Dourado Minerals Ltd. ("Lago") completed 90 RC drill-holes (6,618m) and 70 diamond drill-holes (22,497.81m) between 2010 and 2013. Between 1996 and 1997 by Consolidated Madison Holdings Ltd. ("Madison") completed 91 diamond drill-holes (15,821.89m). Sections within the Mineral Resource are generally spaced 25m to 50m with hole directions varying epending on the orientation of the targeted mineralised zone. Acme in Santiago, Chile were used for fire assays for the Lago samples, whilst Acme in Vancouver, Canada were used for multi-elemental analyses. The samples were assayed for Au by Fire Assay of 50g aliquots followed by Atomic Absorption Spectroscopy (AAS), a technique designed to report total gold. In addition all Lago samples were analysed for a suite of 34 elements with an aqua regia digest and ICP-MS finish. Quality Control procedures were adopted by Meteoric, Crusader and Lago including a selection of either field duplicates, blanks or reference standards being inserted at least 1 in every 20 samples. No geophysical tools were used to determine any element concentrations used in the resource estimate. For Dona Maria hard boundary envelopes have been wireframed to geological (mafic dyke) and structural/alteration boundaries which also typically coincide with high gold grades. In some instances, the gold- hosting zones are visually subtle, and gold grade has been used to define the limits of these zones. For Crentes, the zone has been wireframed to a broad, low grade, approximately 0.2 ppm Au mineralised zone. A lower cut-off of 0.8 ppm Au has been applied to the initial 100m from surface at Dona Maria, Querosene and Crentes as such areas could represent potential open pit mining zones. A lower cut-off of 2.5 ppm Au has been applied to material deeper than 100m from surface as such areas could represent potential underground mining zones. These are considered appropriate cut-off grades based on comparable open pit and underground operations in Brazil and abroad.