Woulfe Mining Corp.

Woulfe Mining Corp.

April 02, 2012 08:30 ET

Woulfe Mining's Sangdong Project NI43-101 Update of Resources-Tungsten Grade Below Level 3 Increased by 47% and Molybdenum Grade by 34%

VANCOUVER, BRITISH COLUMBIA--(Marketwire - April 2, 2012) - Woulfe Mining Corp. ("Woulfe" or the "Company") (TSX VENTURE:WOF)(OTCQX:WFEMF)(FRANKFURT:OZ4) is pleased to announce that Tetra Tech Wardrop (Tetra Tech) have completed an update of the Mineral Resources for Woulfe's Sangdong Tungsten Molybdenum project in South Korea.

The NI43-101 report for the Sangdong Project resource was released today containing new information:

  • Upper section (above level 3) indicated tungsten resource as reported increased by 195% (2.7 times excluding hanging wall ore body)
  • Upper section (Above level 3) Inferred resource increased 2%.

Even with the significant increase in indicated resource above the valley floor the inferred in the same area increased by 2% which gave an overall increase in resources of 47% for the upper section.

  • Lower area below level 3 was modelled giving the higher level of understanding of the mineralisation and the tungsten grade increased by 47% and molybdenum grade 34% which is understandable as we approach the historically drilled high grade molybdenum modelled by KORES below the skarn mineralisation.


Following completion of the phase 2 drilling and further historical data compilation at the Sangdong mine in South Korea, Tetra Tech has completed a further update of the Mineral Resources. The Resource for the skarn mineralised zones is summarised in Table 1. It is important to note that the Indicated Resource does not include the hanging wall zone, as further work is needed to fully appreciate the stability for mining after the main and footwall have been mined. The Resource given in Table 1 represents the whole of the known dip length, split broadly into two zones; that above the historical - level 2, and the resources from - level 2 down dip. Woulfe is continuing to drill and explore within the accessible working areas to refine the Resource.

In order to estimate the down-dip resource potential at the Sangdong Project, presented in Table 1, Tetra Tech has completed a separate estimation of the down-dip resource using all available samples, including those samples which cannot be included in the up dip 'Indicated' Resource. Due to some uncertainties of the historic data, the Resource has been classified as 'Inferred' but is included in order to reconcile the current and previous Tetra Tech estimates and to indicate future potential at Sangdong. Upgrading of the resource category may be realised by continued exploration drilling and by further collection of well documented samples as has been the case with the Phase 1 and Phase 2 drilling in the upper portions of the mine. This estimate is based on geological and mining data not previously available to Tetra Tech to better define the mineralisation geometry compared with previous estimates.

Table 1.Sangdong, Skarn Mineralisation Resource Estimate; Reporting Cut-off 0.15% WO3*
Resource Category Mineralised Zone Tonnes Density WO3
'Indicated' F2 2,298,000 2.98 0.63 0.04 1,448,000
'Indicated' F3 2,604,000 2.96 0.56 0.05 1,458,000
'Indicated' HALO 5,576,000 2.91 0.27 0.03 1,505,000
'Indicated' MAIN 5,952,000 3.25 0.50 0.03 2,976,000
Total Indicated 16,431,000 3.04 0.45 0.04 7,387,000
'Inferred' F2 2,680,000 2.91 0.50 0.03 1,340,000
'Inferred' F3 2,712,000 2.90 0.49 0.03 1,329,000
'Inferred' HALO 6,523,000 2.88 0.23 0.02 1,500,000
'Inferred' HW 7,191,000 2.96 0.58 0.08 4,171,000
'Inferred' MAIN 259,000 2.92 0.52 0.02 135,000
Total Inferred 19,368,000 2.92 0.44 0.05 8,475,000
'Inferred' F2 4,097,000 2.85 0.60 0.07 2,458,000
'Inferred' F3 4,315,000 2.85 0.57 0.06 2,460,000
'Inferred' HALO 5,973,000 2.85 0.21 0.06 1,254,000
'Inferred' HW 15,924,000 2.84 0.69 0.11 10,988,000
'Inferred' MAIN 4,208,000 2.85 0.60 0.03 2,525,000
Total Inferred Down Dip 34,519,000 2.85 0.47 0.07 19,685,000
Note: MoS2 is reported in terms of WO3 cut-off
MoS2=Molybdenum Disulphide
MTU=Metric Tonne Unit
WO3=Tungsten trioxide


This Resource update (effective date January 24th, 2012) represents the update of the combination of the new compliant phase 2 drilling results and further compilation of detailed historical geological and mining data.

Work concentrated on developing more detailed models of the three skarn zones from both drill data and additional historical geological mapping. Importantly, additional intermediate alteration mineralisation was defined between the two thinner skarn zones, the F2 and F3 zones, that go to make up the footwall zone. Additional mining records were digitised and detailed models of historical mining depletion were created.

Each of the skarn zones is described below. In each figure blocks in green are of Indicated category, blue of Inferred category. Blocks shown in red are not classified for reasons described by zone.

Hangingwall Zone

To view Figure 1, visit the following link: http://media3.marketwire.com/docs/Woulfe_Figure1.pdf

Figure 1 (available at www.woulfemining.com) shows that the Hangingwall Zone above level 2 is unclassified in this update. This is a change from the interim resource update of July 2011. Geotechnical studies showed poor ground conditions in this upper area where this zone is close to the surface. In addition the phase 2 drilling encountered consistent problems in attempting to core this zone with little addition to the sample inventory. This reduction in confidence in this zone at this level in the mine led to non-classification. Tetra Tech note, however, that there is still good potential for this zone down dip, which will be reported in the near future.

Main Zone

The detailed study of historical mining areas largely concentrated on the Main Zone. Areas of mining depletion were modelled and Figure 2 (available at www.woulfemining.com) shows the effects of historical mining. The Main Zone is largely mined below the level 2 as shown by the blocks in red. A zone of Indicated mineralisation is defined on the Eastern periphery of the Main Zone. The down dip Resource potential is thought to be limited to pillars remaining in the lowest levels of the old mine.

Footwall Zones

The footwall zones were the main subject of the detailed study of historical geological mapping and distribution of the mineralisation. This resulted in a change of approach from that in the Interim Resource report. This estimate has divided the Footwall Zone into two separate skarn zones, the F2 and F3 zones, plus a zone of lower grade alteration material between these zones termed the Intermediate Zone. It is anticipated that in some areas it will be possible to mine the three units together and this will be determined in the current Feasibility Study work.

Figure 3 (available at www.woulfemining.com) shows the distribution of Indicated and Inferred blocks in the F2 Zone. The current modelling is consistent with historical down dip information for the Footwall Zone and the down dip potential of these zones is good and will be reported in the near future.

To view Figures 2 and 3, visit the following link: http://media3.marketwire.com/docs/woulfe-figure2and3.pdf

Future work

Woulfe is continuing to drill, explore and sample within the Upper Section of the old mine and plan to dewater down to level 4 the near future to allow these efforts to be expanded. Definition and refinement of the Sangdong models will continue as more underground drilling is completed. This data will increase the sample density increasing the area meeting the criteria for the 'Indicated' category.

This news release has been reviewed and approved in the form and context in which it appears by Mr Paul Gribble FIMMM, C.Eng, of Tetra Tech who is working with Woulfe on the Sangdong studies. Mr. Gribble has appropriate qualifications and sufficient relevant experience to qualify as a Qualified Person for the reporting of mineral resources and exploration results for the Sangdong deposit.

On Behalf of the Board of Directors

Woulfe Mining Corp.

Brian Wesson (FAusIMM), President, CEO and Director

About Woulfe Mining Corp.

Woulfe Mining Corp. is a TSX-V listed company with a diversified portfolio of mining licenses for tungsten, molybdenum, gold, base metals and uranium-vanadium in South Korea.

The company's current projects include the Sangdong tungsten-molybdenum mine, historically, one of the largest tungsten mines in the world; the Muguk gold-silver mine, formerly South Korea's largest gold mine, as well as a number of other properties with significant known mineralization and excellent regional exploration potential.

Woulfe has high expectations for near-term, low-cost production. The company has assembled a highly skilled, in-country, bilingual technical team and a board of directors with an outstanding track record of success.

Forward-looking statements and forward-looking information by their nature are based on assumptions and involve known and unknown risks, uncertainties and other factors which may cause the actual results, performance or achievements of the Company to be materially different from any future results, performance or achievements expressed or implied by such forward-looking statements or information. We have made certain assumptions about the forward-looking statements and information and even though our management believes that the assumptions made and the expectations represented by such statements or information are reasonable, there can be no assurance that the forward-looking statement or information will prove to be accurate. Furthermore, should one or more of the risks, uncertainties or other factors materialize, or should underlying assumptions prove incorrect, actual results may vary materially from those described in forward-looking statements or information. These risks, uncertainties and other factors include, among others, the following: commodity price volatility; discrepancies between actual and estimated production, mineral reserves and resources and metallurgical recoveries; mining operational and development risk; litigation risks; regulatory restrictions, including environmental regulatory restrictions and liability; risks of sovereign investment; currency fluctuations; speculative nature of mineral exploration; global economic climate; dilution; share price volatility; competition; loss of key employees; additional funding requirements.

There can be no assurance that forward-looking statements or information will prove to be accurate, as actual results and future events could differ materially from those anticipated in such statements. Accordingly, you should not place undue reliance on the forward-looking statements or information contained herein. Except as required by law, we do not expect to update forward-looking statements and information continually as conditions change and you are referred to the full discussion of the Company's business contained in the Company's reports filed with the appropriate regulatory authorities.

Neither TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.

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