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Location: 157 km W from Hanoi, Vietnam
Level 5, 600 Murray StreetWest PerthWestern Australia, Australia6005
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The Ta Khoa Project is in a magmatic Nickel– Copper–PGE sulfide district associated with the Song Da Rift, a major crustal suture zone, and the Emeishan Large Igneous Province that extends for 1,000 km from northern Vietnam into southern China and hosts several Ni-Cu-PGE deposits.The licenses are located within the Ta Khoa antiform which is a domal feature within the Song Da Rift Zone. The core of the anti-form is dominated by gneisses and schists of the Devonian Nam Sap Formation, which is mantled by calcareous schists and marbles of the Ban Phuc beds. The Ban Phuc beds form the wall-rock host of the Ban Phuc and Ban Khoa DSS deposits and the Ban Chang and King Snake MSV deposits. The unit is favourable host horizon for many of the mafic and ultramafic intrusions and dykes mapped on the dome.Two main types of Ni–Cu–PGE sulfide deposits are recognised within the Ta Khoa district:1) Disseminated Sulfide (DSS) deposits within large ultramafic intrusions, of which the Ban Phuc ultramafic intrusion is the best known and hosts the Ban Phuc DSS deposit and the similar Ban Khoa DSS deposit2) Massive Sulfide Vein (MSV) deposits within or locally related to narrow ultramafic dykes or locally within sedimentary wall rocks. At Ban Chang for example, zones of disseminated, semi-massive and stringer sulfides are associated with massive to semi-massive sulfide veins.Ban Phuc DSSThe Ban Phuc intrusion is one of the larger outcropping ultramafic bodies in the Song Da Rift with dimensions of 940 m by 220-420 m, an outcrop area of 0.25 km2 and preserved depth of up to 470 metres below surface. It hosts the largest known resource of disseminated Ni-Cu-Co (& PGE) sulfides in the license area. The intrusion is comprised of serpentinised dunites and peridotites (with some gabbroic differentiates in it’s upper parts). The intrusion is elongate and trough-shaped with a north-westerly trend corresponding to the strike of the Devonian metasedimentary host rocks. It has intruded along the trend of a discontinuous unit of calcareous Ban Phuc beds. The trough-shaped mineralised domains, which are parallel to the folded shaped of the intrusion.Ban Chang & King Snake MSV The Ban Chang prospect is located 2.5km east of the Ban Phuc deposit adjacent to the Chim Van – Co Muong fault system. The prospect geology consists of a tremolitic dyke swarm within phyllites, sericite schists and sandstones of the Sap Viet Horizon. The MSV mineralisation consists of two west-east striking, steeply south dipping veins which are 580m apart along strike. The eastern vein consists of a vein of massive sulfide which has a disseminated ultramafic outer domain encapsulating the MSV.King Snake is located approximately 1km north of the Ban Phuc disseminated nickel sulfide deposit. The King Snake prospect is a typical magmatic MSV of high-grade brecciated Ni-Cu-Co-PGE associated with tremolite-altered mafic-ultramafic dykes developed along a shear zone within the calcareous sediments and quartzmica schists of the Ban Phuc Horizon.Ban Khoa DSSThe Ban Khoa disseminated nickel sulfide deposit is hosted by a synclinal or trough-shaped serpentinised peridotite, approximately 1km north of the Ban Phuc disseminated nickel sulfide deposit. The Ban Khoa mineralisation comprises broad zones (approx. 150 - 190m thick) with disseminated nickel sulfides throughout the serpentinite, as well as with localised lenses of heavily disseminated nickel sulfide and PGEs, similar to the Ban Phuc deposit.Ban Khoa is in a preliminary development phase and is currently not included in this study.
