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Tulu Kapi Proximal Exploration Update - Guji

10 Oct 2011 10:57

RNS Number : 8741P
Nyota Minerals Limited
10 October 2011
 



 

 

Nyota Minerals Limited ("Nyota" or the "Company")

Tulu Kapi Proximal Exploration Update - Guji Prospect

Highlights

·; Guji is the first prospect in the Tulu Kapi Proximal drill out programme to be "drill-ready";

·; Of two styles of gold mineralisation identified, the saprolite targets warrant further investigation, with peak grades intersected of 21.1g/t Au over 1.0m, 9.85g/t Au over 0.90m, 6.38g/t Au over 0.70m and 3.07g/t Au over 1.10m;

·; Saprolite ore offers a low-cost easily accessible additional potential feedstock for future Tulu Kapi plant;

·; Subject to final interpretation, a programme of close-spaced vertical reverse circulation drilling will be completed over the Guji Prospect; 

 

Richard Chase, Chief Executive Officer commented "The Guji Prospect meets the criteria of one of the three elements of Nyota's strategy, in that it is a potential near-term proximal target, offering additional low-cost easily accessible ore feed that can be quickly monetised.

Shareholders should expect to see further updates around the Proximal Target drill outs, aimed at defining additional resources to both extend mine life and provide alternative sources of feed during the upcoming exploration season which will extend through to June, 2012."

Exploration Programme

A total of 19 diamond drillholes have been completed at Guji since 2007. Holes have been drilled over both gold in soil geochemical anomalies and geophysical targets, with two styles of gold mineralisation being identified. Firstly, near-surface saprolite mineralisation, which Nyota will prioritise, and secondly, gold associated with both sulphide veins - disseminations and quartz veins in fresh rock at depth.

The saprolite mineralisation at Guji will be evaluated with priority on the basis that:

·; The possible saprolite resource is expected to be unconsolidated material that will require no drilling or blasting, ie free dig

·; saprolitic ore may require screening to remove clays and oversize material but is unlikely to require crushing or milling;

·; Guji is located less than 3km from the proposed future Tulu Kapi plant site;

·; Current total cost (load - haul - treatment) is estimated at US$17/t for ore;

A detailed review of all exploration data from the Guji Prospect has been undertaken as part of the on-going process of drill target prioritisation ahead of the next exploration season and has lead to the Prospect being prepared for further drilling.

The Company will undertake some additional trenching prior to a close-spaced drill programme aimed at defining a new saprolite resource. Preliminary interpretation suggests two possible discrete mineralised horizons within the saprolite profile and only by drilling will the Company establish whether these horizons have the necessary strike length continuity and grade to achieve conversion to a resource.

Drilling will be completed using a Reverse Circulation drill rig. Holes will be aligned vertically and will be drilled to the base of the saprolite. Drillhole spacing will be determined once the current interpretation is complete.

Saprolite (Soft rock) mineralisation

Saprolite is defined as a predominantly clay-rich red-brown or grey-white soft rock derived from the in-place chemical weathering of rock such that original structures may still be visible. At Guji, the saprolite extends to a maximum depth of 30 metres over an area of approximately 500 metres by 250 metres. The saprolite is variably mineralised with grades ranging from 0.50g/t Au to 21.10g/t Au.

Sulphide (hard rock) mineralisation

Within the hard rock, underlying the saprolite, gold mineralisation is associated with sulphides inachlorite-carbonate-sericite schist. The host rock is highly deformed and characterised by brecciation, shearing and folding. Sulphide mineralisation occurs as narrow sulphide veins, as disseminated mineralisation, in quartz veins and finally as late-stage filling in fractures. Gold mineralisation is either associated with sulphide veins or disseminated sulphides with grades typically ranging between 0.50 and 4.00g/t Au or associated with fracture filling and gold grades above 4.0g/t Au.

Drilling to date suggests that the Guji sulphide mineralisation is highly complex and a programme of oriented core drilling will be required before a model can be produced that would lead to and drilling of a resource. The sulphide potential at Guji is not considered a priority and will be investigated at some point in the future.

To view Figure 1: Borehole Collar Location Plan - Guji Prospect, please go to the following link:

http://www.rns-pdf.londonstockexchange.com/rns/8741P_-2011-10-10.pdf 

 

To view Table 1: Guji Drillhole Gold Intersections and Grades above 0.50g/t Au cut-off, please go to the following link:

 http://www.rns-pdf.londonstockexchange.com/rns/8741P_1-2011-10-10.pdf

The technical exploration and mining information contained in this Announcement has been reviewed

and approved by Mr D Hage Pr.Sci.Nat, Chief Geologist for Nyota Minerals Limited. Mr Hage has sufficient

experience which is relevant to the style of mineralisation and type of deposit under consideration and to

the activity to which he is undertaking to qualify as a qualified person under the AIM Note for Mining, Oil and Gas Companies. Mr Hage is an employee of Nyota Minerals Limited and is a Member of the South African Council for Natural and Scientific Professions (SACNASP). Mr Hage consents to the inclusion in this Announcement of such information in the form and context in which it appears.

 

For further information please contact:

 

Richard Chase (CEO)

Nyota Minerals Limited

+44 (0)20 7400 5740

info@nyotaminerals.com

 

NOMAD

Ambrian Partners Limited

+44 (0)20 7634 4858

 

BROKER

Guy Wilkes

Ocean Equities Limited

(+44) (0) 20 7786 4370

 

BROKER

Rory Scott

Mirabaud Securities LLP

(+44) (0)20 7878 3360

 

FINANCIAL PR

Paul Youens / Jos Simson

Tavistock Communications

(+44) (0)20 7920 3150

 

Or visit: http://www.nyotaminerals.com

 

This information is provided by RNS
The company news service from the London Stock Exchange
 
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