Asiamet’s BKZ polymetallic project sits within the eastern area of the Kalimantan Surya Kencana (‘KSK’) Contract of Work (“CoW”). The KSK CoW is wholly-owned by Asiamet and is located northwest of Palangkaraya, the regional capital of Central Kalimantan.
BKZ is very strategically located adjacent to existing and proposed infrastructure for the BKM copper project where the Company completed a robust Bankable Feasibility Study (BFS) in June 2019. The high-grade, shallow nature of the BKZ mineralisation coupled with the potential to share infrastructure considerably enhances the opportunity for Asiamet to develop a second, high value mine in the BK district.
The initial Mineral Resource Estimate for BKZ is subdivided into the BKZ Upper Polymetallic Zone (“BKZ-UPZ”) and the BKZ Lower Copper Zone (“BKZ-LCZ”)
The BKZ Upper Polymetallic Zone displays semi-massive to structurally controlled VMS-style lead, zinc, silver and gold mineralisation occurring in a high-grade domain and disseminated style mineralisation in the low-grade domain. The controls on and styles of mineralisation has resulted in significantly different tenors of grade between these domains and hence they are reported separately in the 2018 Resource Estimate. The BKZ Lower Copper Zone comprises a quartz-sulphide stockwork zone hosting chalcopyrite and bornite copper mineralisation. Table 1 below details the BKZ Mineral Resource as estimated in the 2018 Resource model.
Highlights – BKZ Mineral Resource Estimate (100% basis)
- Upper Polymetallic Zone Inferred Mineral Resource comprises:
- High Grade Domain – 750,000 tonnes at 8.0% Zinc, 3.4% Lead, 50g/t Silver and 0.35g/t Gold containing 132Mlbs zinc, 57Mlbs lead, 1.2Moz silver and 8,400oz gold at 4% Zn cut-off grade
- Low Grade Domain – 590,000 tonnes at 1.6% Zinc, 0.5% Lead, 13g/t Silver and 0.15g/t Gold containing 20 Mlbs zinc, 7Mlbs lead, 247Koz silver and 2,800oz gold at 1% Zn cut-off grade
- Lower Copper Zone Inferred Mineral Resource comprises:
- High Grade Domain – 1.1M tonnes at 1.1% Copper and 13g/t Silver containing 26Mlbs copper and 460,000 ounces silver at a 0.5% copper cut-off grade
- Mineralisation remains open in multiple directions at both the BKZ Upper Polymetallic Zone and the BKZ Lower Copper Zone and many targets with potential to expand the Resource base remain to be tested.
The BKZ Upper Polymetallic Zone Mineral Resource is contained within a near-surface, shallow-dipping, strongly mineralised system that extends over an area of 350m (N-S) and 150m (E-W) and remains open in multiple directions. This zone is defined by a continuous high-grade domain and peripheral low-grade domain. Mineralisation in the highgrade domain is characterised by semi-massive to massive replacement style sphalerite-galena with locally very high grades reporting up to 30.7% zinc, 17.7% lead and 158g/t silver over 1-metre sample intervals. Mineralisation within the low-grade domain is characterised by disseminated replacement style sphalerite-galena typically with sample grades ranging between 0.3% to 4.0% zinc, <1.0% lead and <50g/t silver.
Mineralisation in the BKZ Lower Copper Zone (Cu-Ag) comprises stockwork quartz-sulphide and sulphide (pyritechalcopyrite-bornite) veins with assay results reporting up to 12% copper and 20g/t Silver over 1-metre sample
The April 2018 Mineral Resource Estimate for the BKZ Polymetallic deposit is presented in Table 1 below and a copy of the “BKZ Polymetallic Project Resource Estimate Technical Statement” which presents an overview of the
Resource data quality, analyses and estimation process is appended.
BKZ – High Quality Polymetallic/Base Metals Project