Rocher Deboule Minerals Corp. (TSX.V: RD; OTCQB: RDBHF) (“Rocher” or the “Company”) reports that the Company has completed 17 HQ diamond drill holes for 9,930 feet (3,027 meters) on its Artillery Mountains Manganese property in Northwestern Arizona.

During the past year the market prices for all the metals have increased dramatically.  Manganese is no exception.  The market price for manganese was US$4,150 per ton (Northern Miner) on March 25, 2008, an increase of 35.2% since the beginning of the year (Northern Miner), and more than tripled from US$0.68/pound in November 2005.  Electrolytic manganese metal flake product now sells for US$2.25 per pound (see Ryan’s Notes June 23, 2008).

Rocher has acquired, by staking, 247 lode claims for a total of 4,900 acres (1,983 Hectares).  Manganese bearing sedimentary beds are known to exist over much of this area.  Geological mapping by the USGS and the US Bureau of Mines during the latter part of WWII and the early part of the cold war, when manganese was considered a strategic metal, has outlined numerous areas of interest. Rocher has staked most of these areas.  The drilling just completed has tested two of these areas and has found Manganese in both.

Preliminary research of past metallurgical testing on this property, done in that post war era, indicates that the manganese leaches readily in a vat leach process and as such a high quality electrolytic product can be produced.  Rocher has just completed XRD analysis of the mineralization which indicates that the manganese is contained in an amorphous state called wad.

A NI 43-101 qualifying report has been completed and a resource calculation has provided the following results:

Indicated 9,272,442 3.79% 772,475,549
Inferred 2,553,000 3.82% 215,050,000


The following parameters were used to define the Indicated Resource:

  • A cut-off grade of 1% Mn was used equivalent to US$40.00 per tonne.
  • A current price of US$2.00 per pound manganese was used.
  • Blocks were plotted on section and projected half way to the next hole, up to a distance of 50 meters.
  • All intercepts were used as reported, no grades were cut.
  • Intersections were assayed at 10 foot intervals and some samples extended into the waste thus providing a measure of dilution.  Internal dilution was included in the sample.
  • The specific gravity was measured for two samples and the resulting average of 2.00 tonnes per cubic meter was used.
  • Areas were calculated by computer generated measurements.
    • Assay intervals were consistent at 10 feet with no minimum applied.
    • The Indicated Resource calculated according to these parameters is 9,272,442 tonnes of 3.79% Mn, for a total Indicated Resource of 772,475,549 pounds of contained manganese.

The inferred estimate in the MacGregor Mine zone is based on the following parameters:

  • The area of the zone was measured within the limits indicated in the geological interpretation.
  • The area was calculated between the surface outcrop on the east and the claim boundary on the west. And between hole ADH#4 in the MacGregor Mine workings on the north and hole ADH#6 on the south, less the indicated resource already included.
  • The thickness was calculated by averaging all the intercepts within that zone.
  • Tonnages were calculated using 2.00 tonnes per cubic meter.

The inferred estimate in the Chapin Wash Zone is based on the following parameters:

  • The area of the zones was measured within the limits indicated in the geological interpretation.
  • The area was calculated between the surface outcrop in Chapin Wash and the West Splay of the Common Corner Fault.
  • The thickness was taken from the outcrop in the Chapin Wash.
  • Tonnages were calculated using 2.00 tonnes per cubic meter.
  • Grades used were taken from channel samples taken from the outcrop in the Chapin Wash.

Total Inferred Resource was estimated according to the above parameters at 2,553,000 tonnes of 3.82% Mn. for a total of 215,050,000 pounds of contained manganese.

The Indicated Resource is situated in shallow dipping sedimentary beds where the terrain would allow open pit mining with a low stripping ratio.

Both the Indicated and Inferred Resource mineralization in the MacGregor Zone is open down dip to the west.  The Inferred Resource in the Chapin Wash is open to the west on the Rocher Claims although it may be displaced by the Common Corner Fault West Splay.

A Phase II drilling program of fill-in rotary percussion drilling is currently being permitted.

Hole ADH#25 drilled 1.6 kilometers south of Love’s mine, in the South Chapin Wash area,  revealed a new hidden zone called the South Chapin Zone (no outcrop), where grades and widths are comparable to those in the MacGregor Open Pit and Priceless Open Pit deposits  and other deposits in the area which were worked in earlier times.

The Indicated Resource in the South Chapin Zone is open in all directions.  

A 100 meter square grid of rotary percussion drilling is planned to investigate this occurrence.

Mapping and sampling are continuing on the property. 

Six metallurgical test samples totaling 1.5 tonnes of material have been collected.  These samples were shipped to Tucson and testing is underway at the Mountain States R&D International Inc., Vail Metallurgical Test Laboratories, near Tucson, Az.  The object of the testing is to test the economics of leaching and electroplating the manganese to produce a “flake”, the premium product, for the domestic and foreign markets. 

Negotiations for some of the adjacent patented claims have been finalized within the past few days and these acquisitions are expected to provide a significant increase to our resource over the next few months.  

Drilling programs for these patented claims are in the planning stage.

This press release has been reviewed by Norman L. Tribe, P. Eng., a qualified person under NI 43-101.

About Rocher Deboule Minerals Corp.

Rocher Deboule Minerals Corp. is a diversified exploration and development company focusing its attention on mineral properties and commodities used in the steel manufacturing industry.

On behalf of Management


Larry W. Reaugh
President and Chief Executive Officer

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The Toronto Stock Exchange has not reviewed and does not accept responsibility for the adequacy or accuracy of this release. This news release may contain certain “Forward-Looking Statements” within the meaning of Section 21E of the United States Securities Exchange Act of 1934, as amended. All statements, other than statements of historical fact, included herein are forward-looking statements that involve various risks and uncertainties. There can be no assurance that such statements will prove to be accurate, and actual results and future events could differ materially from those anticipated in such statements. Important factors that could cause actual results to differ materially from the Company’s expectations are disclosed in the Company’s documents filed from time to time with the Toronto Stock Exchange, the British Columbia Securities Commission and the US Securities and Exchange Commission.

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