HANETI (nickel & gold)
|Target||Nickel, Platinum-Group-Elements and Gold|
|Location||Dodoma Region, Tanzania|
|Area||~ 5,000 sq. km|
|Main Target Areas||Haneti-Itiso Ultramafic Complex & The Londoni Greenstone Belt|
|Next Steps||• Drilling of existing targets at Mwaka and Mihanza Hills
• Development of further drill targets along the Haneti-Itiso Ultramafic Complex by geological mapping, soil geochemical surveys and geophysical surveys.
• Reconnaissance investigation into the gold potential in the mid and western part of the Haneti (search for extensions of the Londoni Greenstone Belt)
• Further investigation of lithium and associated pegmatite related mineralisation on the project.
Haneti comprises tenements (prospecting licences, offers and applications) prospective for nickel, platinum-group-elements and gold. It covers an area of approximately 5,000 sq. km in central Tanzania and forms a near contiguous project block. The project area straddles the Dodoma, Kondoa and Manyoni districts all within the Dodoma (Administrative) Region. Access to the project is via Dodoma by tar road for 50 km and well maintained gravel road for another 38 km to the village of Haneti. Access within the project is by a dense network of 4WD navigable roads and bush tracks that provide good penetration through most of the tenements.
Haneti-Itiso Ultramafic Complex (HIUC)
The main prospective belt of rocks within the project, the Haneti-Itiso Ultramafic Complex (HIUC), is centred on the small town of Haneti, located 88 kilometres north of Tanzania’s capital city Dodoma . The HIUC sporadically crops out over a strike length of 80 kilometres with most outcrop exposure occurring 15 kilometres east of Haneti village where artisanal mining of the sem-precious mineral chrysoprase (nickel stained chalcedonic quartz) is being carried out at a few localities. The rocks of the HIUC comprises serpentinites (metamorphosed ultrabasic rocks e.g. dunite and peridotite), in parts highly silicified, and standing out as small hills on a flat peneplain. These serpentinites are commonly associated with outcrops of metabasic rocks (metagabbro and metadolerite) which being very hard rocks also stand proud. The HIUC is intruded into gneisses of the Paleo-Proterozoic Usagaran System close to the NE margin of the Archaean Dodoman System which locally comprises granite and granodiorite. Within the project block the Usagaran and Dodoman Systems are in fault contact along a 5-25 km wide ductile shear zone represented by sheared granitoids called the Bubu Cataclasites.
Londoni Greenstone Belt
Bordering the Haneti block to the west, a new greenstone belt, the Londoni Greenstone Belt has been recognised in recent years within the Archaean Dodoman System. AIM-listed Shanta Mining Plc has published a resource of approximately 1 million ounces at a grade of 1.5 grams per tonne from a number of small prospects over a 6 kilometre strike length in this area. This greenstone geology extends southeast in to the Haneti project where work by another company Lake Victoria Gold Mining Company Ltd has reported positive gold exploration results from mining claims that occur within the Haneti prospecting licence Offer area, PLA 1162.
Exploration by Kibo up to the end of 2012 over the HIUC comprised, rock sampling, soil sampling, geological mapping, trenching, geophysical surveys and petrographic analyses.
Rock samples taken from outcrop, spoil heaps, trenches and pits produced numerous high nickel values with the highest values seen in saprolite developed on serpentinite. The best multi-metal rock sample result came from a magnetite rich rock outcrop in an old prospecting pit on Mihanza Hill with values of 13.59% nickel, 0.25% Cobalt, 78 ppb (parts per billion) gold, 413 ppb platinum, 1930 ppb palladium and 927 ppm (parts per million) copper. The high nickel associated with platinum – palladium and copper made this a priority area for follow-up work.
Soil geochemical sampling on 400m X 200 m centres covering an area of 38 square kilometres was carried out during this period also over an area broadly coincident with the rock sampling areas. Geochemical analyses were carried out for a number of metals and results showed significant nickel enrichment in regolith above serpentinites on the hilltops. There was good correlation between nickel, cobalt, copper, gold and arsenic.
A notable development in the exploration at Haneti was the signing of a JV Agreement (JV) with Brazilian Industrial conglomerate Votorantim Metais Participacoes (“Votorantim”) in December 2012. The JV provided for Votorantim to fund further exploration up to a maximum of GBP 2.7 million within an initial period to earn a 50% interest in the project. Following expenditure of the initial tranch of funding of GBP500, 000 in 2013, Votorantim withdrew from the joint venture in December 2013 returning a 100% interest in the project to Kibo. The Votorantim funded exploration programme during 2013 has added significantly to the technical database for the project and has verified and expanded on the historical results enabling a greater understanding of the geology and mineral potential of the project. New prospective areas for nickel-PGM style mineralisation have been discovered along the main target zone (Haneti Itiso Ultramafic Complex) together with better resolution of existing drill targets at Mwaka and Mihanza Hills. A field based regional assessment of the entire project has identified further nickel-PGM, gold and lithium/REE prospective areas as well as enabling a rationalisation of the licence portfolio to be undertaken.
Follow-up field exploration at Haneti was suspended during 2014 to allow the Company dedicate resources to its more advanced development projects at Mbeya and Imweru. However, detailed desktop studies based on its existing large exploration database for the project continued in order to prepare for the next stage of field exploration when funding becomes available.
In early 2015, the Company received the results of an independent geochemical assessment of its historic soil and rock sample multi-element analytical results for Haneti carried out on its behalf by Australian consultants Geoservices Pty Ltd. This was followed up by the implementation of an independent geophysical interpretation study in June 2015 by Australian consultants, Western Geophysics Pty Ltd based on the processing of recently flown airborne geophysical data from Tanzanian Government surveys. The geochemical assessment report concluded that the Mihanza Hill soil and rock anomaly shows strong geochemical characteristics to those that may be expected to overlie a “chondrite” type Ni-Cu-PGM sulphide target .This results has significantly improved the quality of this target for nickel sulphide mineralisation as well as validating the prospectivity of the rest of the HIUC for this style of nickel sulphide mineralisation. The geophysical interpretation revealed that the target nickel sulphide potential rocks on the project were much more extensive than previously thought.
The Company will include drilling of the Mihanza and the Mwaka Hill targets when it instigates the next phase of field exploration at Haneti which it hopes to do later in 2016 or early 2017 .