Andy Well resource upgrade

THE DRILL SERGEANT: Doray Minerals has announced an increase and upgrade to the high-grade Wilber Lode resource at the 80 per cent-owned Andy Well gold project.

The combined Inferred and Indicated resource for the Wilber Lode now totals 680,000 tonnes at 15.1grams per tonne for a total of 331,000 contained ounces

”The aim of this resource update was to upgrade as much as possible of the existing Wilber resource from Inferred to Indicated classification, in preparation for detailed mining studies and delineation of a maiden mining reserve”, Doray Minerals managing director Allan Kelly said in the company’s announcement to the Australian Securities Exchange.

The Andy Well gold project is located approximately 45 kilometres north of Meekatharra, in Western Australia’s Murchison Region.

Schematic N-S Long Section of Wilber Lode resource with grade domains and classification. Source: Company announcement

“This updated resource represents a small increase to the December 2011 total resource, however includes an 18 per cent increase to the indicated component of the Wilber Lode resource ounces, increasing it to 89 per cent of the total Wilber Lode resource.” Kelly said.

Drilling continues at Andy Well, testing for further extensions to the Wilber Lode resource.

High-grade Gold/Copper intercepts at Imperial

THE DRILL SERGEANT: Integra Mining has reported encouraging diamond drilling results from the recently discovered Imperial Prospect located in the Majestic area, part of the company’s Randalls gold project.

The diamond hole was drilled to provide structural information on the mineralisation controls on previously reported high-grade gold and copper intercepts, and has returned positive results including:

– 8.29 metres at 16.51 grams per tonne gold and 1.25 per cent copper, including 1.47 metres at 55.90 grams per tonne gold and 4.24 per cent copper;

– 1m at 5.40 g/t gold and 0.32 per cent copper; and

– 1m at 4.10 g/t gold and 0.02 per cent copper

The Imperial prospect is located approximately 500 metres northwest of the Majestic gold deposit

Integra tenements and project location plan. Source: Company announcement

The Imperial prospect is part of the Monger Joint Venture between Integra (85 per cent) and Newcrest Operations (15 per cent).

Gold mineralisation is hosted within the same granodiorite unit hosting the Majestic gold deposit and appears to be associated with a similar series of porphyry dykes.

Results reported in February from the RC drill program completed in December 2011 indicate that the mineralisation at Imperial continues for at least 190 metres strike and remains open to the north and south and down dip.

Additional RC drilling to further test the continuity and strike extent of gold mineralisation at Imperial is on- going

Assay results from the series of RC drill holes are pending

Navarre strikes high-grade gold at Tandarra

THE DRILL SERGEANT: Navarre Minerals has hit a further high-grade drill intercept on the Tomorrow line of quartz reef at the Tandarra prospect, part of the company’s Bendigo North project, located north of Bendigo in Victoria.

The RC drilling intercept of one metre at 33.6 grams per tonne gold at a depth of 44 metres is contained inside a four metre interval grading 9.4 grams per tonne gold.

The latest intercept is situated approximately 160m north of the company’s best intercept to date of 34.4 grams per tonne gold over a 10 metre interval.

The Navarre also intersected further broad gold mineralisation of 25m at 0.8 g/t gold, including 6m at 1.9 g/t gold from 41m down hole.

Navarre is conducting a 25,000 metre RC drilling campaign at Tandarra targeting shallow gold-bearing quartz reefs and is seeking to build a mineral resource at the project by the end of 2012.


Satellite image of Tandarra prospect showing location of diamond
drilling, significant drill intercepts and status of RC drilling.
Source: Company announcement


“We are encouraged by the broad zone of shallow mineralisation in RCT025 as it now links approximately 320 metres of wide zones of mineralisation in the RC results, which themselves are part of the 2.5 kilometres of confirmed strike established by previous AC drilling,” Navarre Minerals managing director Geoff McDermott said in the company’s announcement to the Australian Securities Exchange.

Navarre believes mineralisation at Tandarra is analogous to the Bendigo Goldfield, approximately 40kms to the south, insofar as nuggety high grade gold is dispersed throughout an envelope of lower grade material.

“We are particularly pleased by the high grade result in RCT050 as we expect to find high grade gold results as our drill density increases in this style of mineralization,” McDermott said.

The relatively shallow depth of the gold mineralisation it has identified so far has Navarre working to establish whether an open pit operation is feasible as a means of mining the high-grade gold within a broader envelope of mineralised material.

“Tandarra was identified by modern exploration techniques, which see through the covering sediments, and followed up by inexpensive scout AC drilling,” McDermott explained.

“Our challenge now is to define the major gold-bearing reefs near surface and to investigate the quartz reefs which repeat at depth, much as they do at Bendigo and other Victorian goldfields.”

Navarre Minerals said it expects to release more drill results from 25 RC holes at Tandarra that have been completed but await assay results, as well as further RC and diamond holes that have yet to be drilled as part of the current program.

Multiple REE discoveries at Mount Muambe

THE DRILL SERGEANT: Africa-focused resource company Globe Metals & Mining has announced the discovery of three new, substantial zones of rare earth mineralisation at the Mount Muambe REE – Fluorite project in Mozambique. By Mark Jones

In 2011, Globe completed 9,427metres of RC drilling at the Mount Muambe REE Fluorite project.

The final 4,050m of drilling focused on new REE targets in six separate zones.

Substantial REE discoveries were made in three of the zones.

Exploration coverage within Mount Muambe crater. Source: Company announcement

Globe’s regional exploration manager for Africa, Michael Schultz, commented, “The three new REE discoveries are a fantastic outcome from the 2011 drilling program at Mount Muambe. Many of our holes show appreciable results with substantial width REE intercepts grading between 1.5% and 4% TREO.”

Highlights of drilling results include:

• 46m @ 2.6% TREO inc. 20m @ 3.3% TREO
• 49m @ 2.5% TREO inc. 20m @ 3.5% TREO
• 47m @ 1.7% TREO inc. 17m @ 2.4% TREO
• 60m @ 2.1% TREO inc. 24m @ 2.6% TREO
• 28m @ 2.1% TREO inc. 12m @ 2.9% TREO  

Schultz added: “The most exciting development is the fact that the majority of the REE drill intercepts are open at depth and hosted in carbonatite, the most dominant rock type in the crater. This clearly shows the potential to discover large tonnages of REE mineralisation.”

All substantial zones of REE mineralisation intersected remain open at depth and laterally.

A diamond and RC drill rig have mobilised to site to begin the substantial 2012 drilling program.

Detailed metallurgical test work will commence at the completion of the diamond drilling program.

Sirius scores gold multiple gold hits at Polar Bear

THE DRILL SERGEANT: Sirius Resources has claimed discovery of high-grade gold mineralisation in its first reverse circulation (RC) drilling program undertaken at the Earlobe prospect on the company’s 100 per cent-owned Polar Bear project in Western Australia.

Sirius said it had intersected gold mineralisation in a number of RC holes drilled beneath earlier shallow reconnaissance drill intersections carried out in in November 2011.


Earlobe prospect, showing location of drillholes and gold
intersections in recent aircore and RC drilling. Source: Company


Key intercepts and highlights of the recent drilling include:

20 metres at 3.18 grams per tonne gold from 36 metres, including 2 metres at 26.6 grams per tonne gold from 36 metres; and

19m at 1.56 g/t gold from 46m, including 4m at 6.09 g/t gold from 50 metres.

The drilling also encountered a two metre zone exhibiting variable gold in repeat assays (1.4, 5.04 and 24.9 g/t gold from 82m), which the company said suggests nuggety gold could be present.

Sirius is of the opinion the distribution of the gold intersections on two lines of drilling at the Earlobe North zone suggests there are several gently to moderately east dipping lodes open down dip (to the east) and along strike of the drilling it has completed so far.

The company has taken encouragement from these results, as they are the first gold-focused RC drilling program to be conducted at Polar Bear and that the project is located between three major known goldfields.

The project neighbours the 10 million ounce Norseman camp 30 kilometres to the south, the 8 million ounce St Ives camp 60km to the north and the 2 million ounce Higginsville gold mine 20km to the north-northwest.

“It is very encouraging to make this discovery – it vindicates our belief in the Polar Bear project – a belief which led us in 2010 to purchase Barrick’s 80 per cent interest in the project to obtain full ownership,” Sirius Resources managing director Mark Bennett said in the company’s announcement to the Australian Securities Exchange.

“To achieve such results in the first RC drilling program, and also beneath transported sediments and unconformable Tertiary rocks, attests to the untapped prospectivity of the area, despite it being in the heartland of the Eastern Goldfields.”

Sirius said it intends to carry out follow up RC drilling to scope out the extent, orientation and continuity of the mineralisation once a drill rig can be sourced and drilling approvals obtained.

Ventnor hits deep mineralisation at Thaduna

THE DRILL SERGEANT: Phase 4 drilling being carried out by Ventnor Resources at the Thaduna prospect has hit deeper copper mineralisation.

The Thaduna prospect is situated on the company’s Thaduna and Green Dragon copper project located 170 kilometres north of Meekatharra, in the Doolugunna district of Western Australia.

The project sits 40km east of the Degrussa project of Sandfire Resources.

According to Ventnor a recent diamond drilled tail to extend a previous RC drill hole at the Thaduna prospect has intersected sulphide mineralisation observed over 14.0 metres from 250.6m to 264.6m down hole with chalcopyrite/bornite matrix mineralisation.

The company said this intersection represents a southerly down plunge extension to the main lode system which it considers to be evidence of an increase in grade and thickness with depth.

The core sample has been logged and cut, with half core samples having been submitted for assay.


The section above shows mineralisation intersected at Thaduna. Source: Company announcement


“This is our deepest intersection to date and primary mineralisation has now been intersected at 200 metres vertical depth,” Ventnor Resources managing director Bruce Maluish said in the company’s announcement o the Australian Securities Exchange.

“This presents a compelling case to extend the current drilling campaign to investigate the potential below this intersection.

“Five additional deeper holes have been planned along strike; sites are being prepared for drilling to be undertaken during May.”
The planned additional holes will be RC pre-collars with diamond tails.

The company said the holes are being projected to intersect the lode system at 300m vertically below the surface.

Ventnor has now completed a total of 137 holes for 18,431m at Thaduna.

The Phase 4 drilling, which the company commenced in January 2012, was focused on Thaduna to extend existing RC holes terminating in mineralisation with diamond tails.

Mutiny continues to hit high grade gold and copper at Deflector

THE DRILL SERGEANT: Australian gold-copper resources company, Mutiny Gold has announced new high-grade gold intersections from the West Lode of its Deflector Gold deposit in Western Australia. By Mark Jones.

The results were received from Mutiny’s ongoing diamond drilling program at the Deflector deposit. The results will be incorporated into the revised resource estimation, which is expected to be released in the coming months.

Mutiny has almost completed a new 67-hole diamond drill program at its Deflector deposit

 Deflector gold-copper deposit. Source: Company announcement

The initial 12 holes were drilled to verify the general tenor of shallow historical drill-holes for which full data was unavailable.

These holes targeted both high and low grade areas of the West and Central Lodes; an initial examination of the results indicated that the holes have verified the tenor of the previous drilling.

Intersections include:

•    3.3 metres @ 79grams per tonne and 10.5 per cent copper from 62 metres
•    3m @ 3.4g/t gold and 0.2 per cent copper from 32m
•    3m @ 4.1g/t gold and 0.1 per cent copper from 11m

As with previous holes in the area, multiple intersections were achieved within some holes, as a number of parallel lodes are present at depth within the deposit.

“The continued discovery of high-grade gold and copper intersections at Deflector continued to increase confidence in the quality of the asset”, said Mutiny Gold’s managing director, John Greeve, in an announcement to the Australian Securities Exchange.

He added, “we look forward to releasing further results from the diamond drill program over the coming weeks.”

The company plans to commence mine development in the second half of 2012 leading to an open pit mining operation at the Deflector deposit, followed by underground mining after two years.


Good results continue at Bibiani for Noble

THE DRILL SERGEANT: Noble Mineral Resources has received further high-grade drilling results, including 2 metres at 52 grams per tonne gold from outside the current resource area at the company’s Bibiani gold project in Ghana.

Noble has focused the recent drilling on resource definition at the Big Mug and South Hill satellite deposits along with brownfields exploration at the West and East Wall of the Main Pit at Bibiani.

It is also continuing with grade control drilling in the satellite Walsh-Strauss Gap area, which has returned encouraging results from much shallower depths than the company had previously encountered.

Noble said it considers the latest results to be significant as they were achieved from areas outside the existing 2.26 million-ounce gold resource at Bibiani.


Areas of drilling. Source: Company announcement

The company intends using the satellite deposits to provide the first source of primary ore feed for the refurbished three million tonne a year plant at Bibiani.

Intercepts from recent drilling include:

Big Mug

–    17 metres at 8.21 grams per tonne gold from 80 metres, including 2 metres at 52.49 grams per tonne gold.

–    23m at 3.02 g/t from 195m, including 2m at 12.36 g/t; and

–    6m at 2.14 g/t from 136m, including 1m at 3.68 g/t.

East Wall of Main Pit

–    3m at 18.44 g/t from 205m, including 1m at 37.64 g/t; and

–    3m at 7.70 g/t from 225m, including 1m at 21.95 g/t.

South Hill

–    6m at 2.14 g/t from 136m, including 1m at 3.68 g/t.

Walsh-Strauss Gap

–    1m at 3.74 g/t from 24m; and

–    1m at 4.82 g/t from 45m.

“The commissioning of the processing plant is now in the advanced stage with plant running time improving rapidly in line with budgeted ramp-up projections,” Noble Mineral Resources said in its ASX announcement.

“Calculated head grade of the commissioning feed to date is 1.18 grams per tonne versus the budgeted grade of 0.9 grams per tonne – a 30 per cent increase.

“Recoveries are consistent with budgeted projections and are expected to improve further as the plant reaches steady-state production.”

Noble said it expects to complete the first gold pour at Bibiani this month.

Production is forecast to ramp up to an annual rate of 150,000 ounces in 2012.

Gryphon drills high-grade at Nogbele

THE DRILL SERGEANT: Gryphon Minerals has received results from infill and step-out RC and DD drilling conducted on the Nogbele deposit and its planned gold processing plant, at the company’s Banfora gold project in Burkina Faso, West Africa.

“These latest drill results from the Nogbele deposit demonstrate the shallow and outcropping nature of the high grade zones, which of course will be significant in the “starter pit” designs of the Definitive Feasibility Studies on track for the third quarter of this year,” Gryphon Minerals managing director Steve Parsons said in the company’s announcement to the Australian Securities Exchange.

“With eight rigs now turning onsite and the Definitive Feasibility Studies well underway, the focus remains on rapidly advancing the Banfora gold project”.

The latest drilling at the Nogbele deposit has been designed to target shallow mineralisation as well as higher grade down dip extensions below 100 meters vertical depth.

Drilling results from the Nogbele deposit. Source: Company announcement 

Gryphon said mineralisation at Nogbele outcrops from surface and continues to be open along strike and down dip with drilling ongoing.

Results of shallow step-out and infill drilling include:

– 16 metres at 8.61 grams per tonne gold from surface;

– 17m at 6.85g/t gold from 22m;

– 20m at 4.45g/t gold from 40m and 12m at 1.47g/t gold from 76m;

– 20m at 3.94g/t gold from 64m; and

– 7m at 10.98g/t gold from 95m.

Drilling of step-out mineralized zones targeting +100 metres depth include:

– 12m at 4.00g/t gold from 144m;

– 12m at 3.31g/t gold from 184m;

– 2m at 94.29g/t gold from 123m;

– 4m at 10.00g/t gold from 193m and 14m at 1.85g/t gold from 215m; and

– 6m at 1.61g/t gold from 149m and 12m at 2.45g/t gold from 164m.

Gryphon currently has three RC and two diamond drill rigs completing the drilling at the Nogbele as well as at the Samavogo deposit.

There is also one RC rig operating at its new Stinger satellite target.

The company said all drilling results will be included in its next resource estimate calculation, which is expected for the second quarter of 2012, leading up to the completion of the Definitive Feasibility Studies in the third quarter of 2012.

Navarre continues to intercept gold mineralisation

THE DRILL SERGEANT: Gold exploration company Navarre Minerals has announced further results from a 25,000 metre RC drill program currently underway at the Tandarra prospect, part of the company’s Bendigo North project, located 40 kilometres north of Bendigo in Victoria.

The drilling has returned near surface intersections of gold mineralisation including:

–    17 metres at 1.0 grams per tonne gold t from 27 metres down hole, including 1 metre at 10.6 grams per tonne gold and 6 metres at 1.9 grams per tonne gold from 54 metres down hole;

–    19m at 1.1g/t from 60m down hole, including 1m at 7.5g/t;

–    18m at 1.0g/t from 53m down hole, including 9m at 1.8g/t from 53m down hole; and

–    9m at 1.0g/t from 27m down hole.


Satellite image of Tandarra prospect showing location of diamond
drilling, significant drill intercepts and status of RC drilling.
Source: Company announcement

Navarre said it believes the broad zones of shallow gold mineralisation identified at the Tandarra prospect may offer potential for open pit bulk mining opportunities.

“We are very pleased to continue to encounter multiple broad zones of gold mineralisation from shallow depths,’ Navarre Minerals managing director Geoff McDermott said in the company’s announcement to the Australian Securities Exchange.
“The higher grade gold intersected appears to be erratically distributed and coarse in nature, which is within our expectations.

“These higher grades occur within a broad halo of mineralised quartz and we expect that as the drilling density is increased we should see further high grade intercepts.”

The current RC drill program has been designed to provide Navarre sufficient data to enable the estimation of a maiden mineral resource at Tandarra by the end of 2012.

So far, Navarre has drilled 47 air-core and 53 RC holes on the project targeting a ‘buried hill’ of approximately 35km square in area.

The company said this drilling has confirmed this buried hill to contain multiple mineralised quartz reefs concealed below a thin veneer of sedimentary cover ranging in thickness from 15 metres to 80 metres.

“The widths and assays that we seeing are consistent with our concept that an open pit allows the recovery of more reef material, increasing the potential to capture any nuggets which, due to their erratic distribution, can be difficult to target through drilling,” McDermott said.

“We are at an early stage of evaluation, but what I can say is that the reefs are near surface, they are well defined by geophysics, they repeat at depth and in parallel and they carry gold grade in the main target zones of the Macnaughtan and the Tomorrow Lines.”