Mr. Larry W. Reaugh, President & Chief Executive Officer of Rocher Deboule Minerals Corp. (TSX.V: RD; Pink Sheets: RDBHF) (“Rocher Deboule” or the “Company”) is pleased to report results of the NI 43-101 updated resource estimate on their 100% owned Artillery Peak Manganese project in Arizona.

The report, adhering to the NI 43-101 standards, quotes 10,865,929 tonnes of Indicated Resource at a grade 4.46% Mn backed up by an inferred resource of 96,933,724 tonnes of 4.52% Mn. There are several deposits on the property with historical production that remain untested in modern times and do not contribute to these resource estimates.

Larry W. Reaugh, President & Chief Executive Officer said “The NI 43-101 Resource study by N. Tribe & Associates Ltd. not only confirms the great potential of Artillery Peak it also gives us the basis to aggressively move the project forward, we are very pleased.”

The NI 43-101 Resource Study Estimate at a 0.91% Mn Cut-off is summarized as follows:

RESOURCE CALCULATION  
POUNDS PER 1%/TONNE 22.06
DENSITY 15 CUBIC FEET PER TON
DENSITY 2.13 TONNES PER CUBIC METER

The 2009 Mineral Resource Estimate is reported in accordance with Canadian Securities Administrators’ National Instrument 43-101 (“NI 43-101”) and has been estimated in conformity with the Canadian Institute of Mining, Metallurgical and Petroleum (CIM) Mineral Resource and Mineral Reserve definitions referred to in NI 43-101, Standards of Disclosure for Mineral Projects.  Mineral resources are not mineral reserves and do not have demonstrated economic viability.  There is no certainty that all or any part of the mineral resource will be converted into mineral reserves.  The 2009 Mineral Resource Estimate was prepared by Norman Tribe, P.Eng, of N. Tribe & Associates Ltd., an independent qualified person as this term is defined in NI 43-101.  The 2009 Mineral Resource Estimate used a polygon method where the area of influence is half way to the nearest hole and the thickness of section is taken from the drill hole. No dilution is added to the resource at Maggie Canyon.  The fixed width sampling technique used on the MacGregor drill samples introduced a dilution of about 5%.  The syngenitic manganese bearing beds are near horizontal and the drilling is vertical, giving a true thickness in the hole.  For the Maggie Deposits the drilling results are taken from published U.S. Bureau of Mines “Report of Investigation 5375”.  For the MacGregor Deposits, Rocher Deboule drilling in 2008 has provided drill data.  Assaying was completed at ALS Chemex in Sparks Nevada and North Vancouver, using their ME-ICP61, ME-ICP06 AND ME-OG62 assay methods and checks were run at American Assay Laboratories in Sparks Nevada.  The new NI 43-101 technical report will be filed with regulators on SEDAR within 45 days of this news release.

The Artillery Mountain Manganese deposits are strata bound sedimentary deposits in paleo-alluvial fans on the flanks of the Artillery Mountain Range and the Rawhide Mountain Range coming together in the center of the basin.  The preliminary mineralogical work has indicated that the mineralization consists mainly of wad, and amorphous mixture of manganese, barium, strontium, silica and carbonate.  The mineralization is exposed in the McGregor Mine open pit working face, in both walls of the Maggie Canyon and the adits in the south canyon wall, in numerous adits and declines on the Lake Patents, in the decline of the Love Mine, in the adits on the Planche Mesa, the west wall of the Chapin Wash below Loves’ Mine, on the West side Burro Wash and in numerous outcrops throughout the property as well as in drill hole ADH#25.  Although manganese is ubiquitous through the basin the mineralization is concentrated in strata with syngenitic manganese originating from vents or hot springs immediately up slope from the manganese beds.  The best of these manganese deposits are thought to be 800 meters long and 35 meters thick, be lens like in nature and extend down slope (paleo-slope) a distance of 1000 meters.  In some cases the lenses are truncated by faulting which has shifted parts of the lens up, down or laterally.  Well developed horst and graben structures are developed throughout the basin.

The initial drilling program by Rocher Deboule Minerals Corp. consisted of 17 diamond drill holes 9 on the upper Chapin Wash in the vicinity of the MacGregor Mine and 8 in the lower Chapin Wash around and south of Love’s Mine.  Eight of the nine holes in the Upper Chapin Wash portion of the property intersected mineralization of interest.  The six holes in the Love’s Camp area did not intersect significant mineralization and two in the southernmost part of the claims returned values as good as those in the MacGregor Mine area.

In a period in the 1940’s and 1950’s, M.A. Hanna Co. and the U.S. Bureau of Mines concentrating on the Maggie Canyon deposits drilled 58 diamond drill holes and drove 3 adits into the south wall of the Maggie Canyon and drilled a further 58 short diamond drill holes from underground and carried out bulk sampling and shipping to the strategic metals stock pile in Wenden, Az.

A resource was calculated using the recently collected drill hole data as well as the historical data which was gleaned from the U.S. Bureau of Mines publications.  Further resource was added from sampling reported in the government publications, in the Lake Mine, the Love Mine, the Hurley Mine and other small operations along the Chapin and Maggie Washes.

Metallurgical Studies

The Company’s focus has been on developing a process to economically develop the Artillery Mountains Manganese project to supply a portion of the US steel industry requirements.  The price for manganese metal is currently US $1.25/lb reflecting a much smaller price decline than copper, zinc, lead and molybdenum.  The Company believes that the bulk mining of low grade manganese is key to supplying the US steel industry, thus avoiding the uncertainties of dealing with suppliers in Africa.  To that end metallurgical studies are presently underway based on compiling the information both from historical and recently acquired data that has been accumulated over the years on the Artillery Mountains Manganese.

Metallurgical testing during 2008 by Mountain State Research and Development Institute (“MSRDI”) of Arizona and Process Research & Associates (“PRA”) of Richmond, British Columbia confirmed that manganese extraction in excess of 90% can be achieved from leaching coarse particals by sulphurus acid.  PRA also produced manganese metal using the proprietary EMEW electrolysis technology.

The Company has requested proposals from several metallurgical companies to advance their ongoing process studies on the Artillery Mountains Manganese.

Scoping Study

The Company will be expanding its economic business plan and will develop a NI 43-101 scoping study to better understand the economics of processing Artillery Peak’s manganese.

Drilling

N. Tribe & Associates Ltd. has detailed areas in the NI 43-101 report for drilling programs to further develop the Artillery Mountains Manganese resource.  The report recommends 7,025 meters of reverse circulation drilling in 134 drill holes.

About Manganese

Manganese is used in the production of iron and steel.  As the demand for iron and steel rises the demand for manganese rises proportionally.  Worldwide production of manganese alloys reached 11.8 million tonnes in 2006 (up 14% from 2005) and 13.3 million tonnes in 2007 (up 13.3% from 2006) with China producing 46% or 6.2 million tonnes.  China is currently looking at measures to control production by increasing export taxes by 20%.  Manganese prices are currently at US $1.25/lb (April 23, 2009).

  • Manganese is the fourth largest consumed metal (approximately 29.3 billion lbs/yr) after iron, aluminum and copper. 
  • Manganese has no substitute in the manufacture of steel. Most mild steel consumes 10 – 20 lbs of manganese per tonne. 
  • There is no production of manganese in North America where the US steel companies import all of their manganese requirements from foreign countries, while having huge deposits of iron ore domestically. 
  • Manganese is considered a strategic metal and Rocher has 100% control of the largest manganese resource in the southwestern United States.

This release has been reviewed by Norman L. Tribe, P.Eng, a qualified person pursuant to National Instrument 43-101.

On behalf of Management

ROCHER DEBOULE MINERALS CORP.

Larry W. Reaugh
President and Chief Executive Officer


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.