Breakwater Reports Updated Mineral Reserves And Mineral Resources Estimates for Langlois Mine



    TORONTO, Sept. 18 /CNW/ - Breakwater Resources Ltd. (TSX - BWR)
("Breakwater") today announced an update to its mineral reserves and mineral
resources estimates for the Langlois mine, prepared in accordance with
National Instrument 43-101 ("NI 43-101"). Langlois, which is situated in
north-western Québec approximately 213 kilometres north of Val-d'Or, reached
commercial production as of July 1, 2007.
    To September 1, 2007, 38,608 metres of the 50,360 metre diamond drill
program planned for 2007 at Langlois have been completed. The 2007 drill
program at Langlois was designed to investigate the highly prospective
extensions of all the known zones containing resources and reserves at the
mine. During the first half of 2007, Zones 3 and 4 surface extensions were
drilled from surface and economic mineralization was encountered which extends
from the current workings to surface and consequently new resources were
estimated for Zones 3 and 4.
    During the second quarter of 2007, the Certificate of Authorization was
received from the Ministère du Développement Durable, de l'Environnment et des
Parcs for the Grevet B mine. Following receipt of the Certificate of
Authorization, a portion of the Grevet B mineral resources was reclassified
into mineral reserves. Grevet B material will be mined and milled during 2007
and 2008.
    To June 30, 2007, mineral reserves at Langlois have increased by
325,000 tonnes in the area of the current workings for Zone 3 and 4 to surface
after mining 186,500 tonnes. A new ramp from surface was collared during the
first quarter of 2007. By the beginning of the third quarter of 2007, the new
ramp had accessed the upper portions of Zone 4 between the current mining
areas and surface. The mining of this material is not included in the current
mine plan and, although lower grade, is economic at current prices.

    
             Langlois Mine Proven and Probable Mineral Reserves

                                             June 30, 2007
    Proven Reserves       Tonnes      Zn (%)     Cu (%)   Ag (g/t)   Au (g/t)
    -------------------------------------------------------------------------
    Zone 3               385,000       7.93       0.47      31.35       0.12
    Zone 4                43,400      11.81       0.39      38.99       0.16
    Zone 97                    -          -          -          -          -
    Grevet B              54,800       8.59       0.28      25.10       0.04
    -------------------------------------------------------------------------
    -------------------------------------------------------------------------
    Total                483,200       8.36       0.44      31.32       0.12


    Probable Reserves     Tonnes      Zn (%)     Cu (%)   Ag (g/t)   Au (g/t)
    -------------------------------------------------------------------------
    Zone 3               890,700       7.57       0.40      32.16       0.05
    Zone 4               459,500       6.44       0.31      45.12       0.12
    Zone 97            2,119,300      11.51       1.02      59.28       0.09
    Grevet B              29,900       7.27       0.28      21.62       0.03
    -------------------------------------------------------------------------
    -------------------------------------------------------------------------
    Total              3,499,400       9.81       0.76      50.20       0.08


    Proven & Probable
    Reserves              Tonnes      Zn (%)     Cu (%)   Ag (g/t)   Au (g/t)
    -------------------------------------------------------------------------
    Zone 3             1,275,700       7.68       0.42      31.91       0.07
    Zone 4               502,900       6.90       0.32      44.59       0.12
    Zone 97            2,119,300      11.51       1.02      59.28       0.09
    Grevet B              84,700       8.12       0.28      23.87       0.04
    -------------------------------------------------------------------------
    -------------------------------------------------------------------------
    Total              3,982,600       9.63       0.72      47.91       0.09



          Langlois Mine Measured and Indicated Mineral Resources(*)

                                             June 30, 2007
    Measured Resources    Tonnes      Zn (%)     Cu (%)   Ag (g/t)   Au (g/t)
    -------------------------------------------------------------------------
    Zone 3               582,600       8.18       0.45      28.12       0.12
    Zone 4                40,400      14.21       0.50      37.62       0.15
    Zone 97                    -          -          -          -          -
    Grevet B              47,600      10.98       0.35      32.10       0.06
    -------------------------------------------------------------------------
    -------------------------------------------------------------------------
    Total                670,600       8.74       0.45      28.97       0.12


    Indicated Resources   Tonnes      Zn (%)     Cu (%)   Ag (g/t)   Au (g/t)
    -------------------------------------------------------------------------
    Zone 3             1,271,300       8.80       0.47      34.32       0.05
    Zone 4               601,000       8.06       0.38      42.95       0.12
    Zone 97            3,319,900      11.81       0.93      64.82       0.09
    Grevet B             188,000       9.97       0.64      25.49       0.06
    -------------------------------------------------------------------------
    -------------------------------------------------------------------------
    Total              5,380,200      10.61       0.75      53.79       0.08


    Measured &
    Indicated
    Resources             Tonnes      Zn (%)     Cu (%)   Ag (g/t)   Au (g/t)
    -------------------------------------------------------------------------
    Zone 3             1,853,900       8.60       0.46      32.37       0.07
    Zone 4               641,400       8.45       0.39      42.61       0.12
    Zone 97            3,319,900      11.81       0.93      64.82       0.09
    Grevet B             235,600      10.17       0.58      26.83       0.06
    -------------------------------------------------------------------------
    -------------------------------------------------------------------------
    Total              6,050,800      10.41       0.72      51.04       0.09

    (*)Measured and Indicated resources include proven and probable reserves
    Langlois Mine Inferred Mineral Resources


                  Langlois Mine Inferred Mineral Resources

                                             June 30, 2007
    Inferred Resources    Tonnes      Zn (%)     Cu (%)   Ag (g/t)   Au (g/t)
    -------------------------------------------------------------------------
    Zone 3               694,300       7.61       0.28      25.15       0.10
    Zone 4               144,600       5.73       0.25      34.89       0.06
    Zone 97              919,200       9.67       0.64      55.73       0.16
    Grevet B              94,600       6.25       0.37      19.64       0.05
    -------------------------------------------------------------------------
    -------------------------------------------------------------------------
    Total              1,852,700       8.42       0.46      40.80       0.12

    

    NOTES TO INVESTORS CONCERNING ESTIMATES

    Cautionary note to investors concerning estimates of Measured and
    Indicated Resources.

    This news release may use the terms "measured resources" and "indicated
resources". The Company advises investors that while those terms are
recognized and required by Canadian regulations, the U.S. Securities and
Exchange Commission (the "SEC") does not recognize them. Investors are
cautioned not to assume that any part or all of the mineral deposits in these
categories will ever be converted into reserves.

    Cautionary note to investors concerning estimates of Inferred Resources.

    This news release may also use the term "inferred resources". The Company
advises investors that while this term is recognized and required by Canadian
regulations, the SEC does not recognize it. "Inferred resources" have a great
amount of uncertainty as to their existence, and great uncertainty as to their
economic and legal feasibility. It cannot be assumed that all or any part of
an inferred mineral resource will ever be upgraded to a higher category. Under
Canadian rules, estimates of inferred mineral resources may not form the basis
of feasibility or pre-feasibility studies, except in rare cases. Investors are
cautioned not to assume that part or all of an inferred resource exists, or is
economically or legally mineable.

    Metal Price Assumptions

    For the June 30, 2007 mineral reserves estimates, metal prices, including
premiums, used to determine economic viability for Zones 3, 4 and 97 were
US$1.12/lb. zinc, C$/US$ exchange rate of 1.09, US$600/oz. gold, US$12.00/oz.
silver, US$2.55/lb. copper and US$0.54/lb. lead. For the newly defined upper
portions of Zones 3 and 4 and for Grevet B, a satellite deposit at Langlois,
the metal prices used were US$1.45/lb. zinc, C$/US$ exchange rate of 1.09,
US$12.00/oz. silver and US$3.27/lb. copper. Higher prices were used on these
deposits as it is expected that they will be mined over the next two years.

    Scientific and Technical Data

    The Company is reporting mineral resource and reserve estimates in
accordance with the CIM guidelines for the estimation, classification and
reporting of resources and reserves.
    The Canadian Securities Administrators' National Instrument 43-101 ("NI
43-101") requires mining companies to disclose reserves and resources using
the subcategories of "proven" reserves, "probable" reserves, "measured"
resources, "indicated" resources and "inferred" resources. Mineral resources
that are not mineral reserves do not have demonstrated economic viability.
    A mineral reserve is the economically mineable part of a measured or
indicated resource demonstrated by at least a preliminary feasibility study.
This study must include adequate information on mining, processing,
metallurgical, economic and other relevant factors that demonstrate, at the
time of reporting, that economic extraction can be justified. A mineral
reserve includes diluting materials and allows for losses that may occur when
the material is mined. A proven mineral reserve is the economically mineable
part of a measured resource for which quantity, grade or quality, densities,
shape and physical characteristics are so well established that they can be
estimated with confidence sufficient to allow the appropriate application of
technical and economic parameters, to support production planning and
evaluation of the economic viability of the deposit. A probable mineral
reserve is the economically mineable part of an indicated mineral resource for
which quantity, grade or quality, densities, shape and physical
characteristics can be estimated with a level of confidence sufficient to
allow the appropriate application of technical and economic parameters, to
support mine planning and evaluation of the economic viability of the deposit.
    A mineral resource is a concentration or occurrence of natural, solid,
inorganic or fossilized organic material in or on the earth's crust in such
form and quantity and of such a grade or quality that it has reasonable
prospects for economic extraction. The location, quantity, grade, geological
characteristics and continuity of a mineral resource are known, estimated or
interpreted from specific geological evidence and knowledge. A measured
mineral resource is that part of a mineral resource for which quantity, grade
or quality, densities, shape, physical characteristics, can be estimated with
a level of confidence sufficient to allow the appropriate application of
technical and economic parameters, to support mine planning and evaluation of
the economic viability of the deposit. The estimate is based on detailed and
reliable exploration, sampling and testing information gathered through
appropriate techniques from locations such as outcrops, trenches, pits,
workings and drill holes that are spaced closely enough to confirm both
geological and grade continuity. An indicated mineral resource is that part of
a mineral resource for which quantity, grade or quality, densities, shape and
physical characteristics can be estimated with a level of confidence
sufficient to allow the appropriate application of technical and economic
parameters, to support mine planning and evaluation of the economic viability
of the deposit. The estimate is based on detailed and reliable exploration and
testing information gathered through appropriate techniques from locations
such as outcrops, trenches, pits, workings and drill holes that are spaced
closely enough for geological and grade continuity to be reasonably assumed.
An inferred mineral resource is that part of a mineral resource for which
quantity and grade or quality can be estimated on the basis of geological
evidence and limited sampling and reasonably assumed, but not verified,
geological and grade continuity. The estimate is based on limited information
and sampling gathered through appropriate techniques from locations such as
outcrops, trenches, pits, workings and drill holes. Mineral resources which
are not mineral reserves do not have demonstrated economic viability.

    Investors are cautioned not to assume that part or all of an inferred
    resource exists, or is economically or legally mineable.

    The effective date of the Company's mineral reserves and mineral
resources estimate for Langlois is June 30, 2007. The 2007 estimated measured
and indicated mineral resource and the estimated inferred mineral resource
were prepared under the supervision of Torben Jensen, P.Eng., who is employed
by the Company as VP, Engineering and who is a Qualified Person under NI
43-101. The Company advises investors that while the terms measured resources,
indicated resources and inferred resources are recognized and required by
Canadian Regulations, the SEC does not recognize them.
    The qualified person responsible for the Langlois mineral reserve and
mineral resource estimates for Zones 3 and 4 is Donald Gervais, member of
l'Ordre des géologues du Québec, Chief Geologist. The mineral resources and
mineral reserves at Langlois are estimated utilizing two-dimensional polygons
on cross-section, using the information from core drilling and underground
chip sampling across development faces. Two-dimensional kriging and polygons
on longitudinal section have also been used to a lesser degree, typically in
areas where there is less available data.
    The qualified person responsible for the Langlois mineral reserve and
mineral resource estimates for Zone 97 is Jean-Francois Couture, P.Geo. of SRK
Consulting. From the borehole database coded by the Company, SRK extracted
intercept data for three sulphide-bearing zones (North, Main and South)
comprised within Zone 97 and constructed solid bodies for each sulphide zone.
Limits of each zone were determined visually on vertical sections based on
geology, sulphide abundance and mineralogy and not based on an arbitrary lower
zinc cut-off. Assay data for zinc, copper, silver and gold were
density-weighted and composited over the true thickness of each zone.
Variography analysis and kriging was completed on the product of the
composited density-weighted grades and the true thickness. Grade for
individual blocks in the model were derived by dividing the resulting
interpolated grade/thickness by the true thickness of each block. In this way
the true thickness and density variability are considered during grade
interpolation, something that is not possible with polygonal sectional
interpolation. Capping of the zinc grades was not deemed to be necessary
because it is appropriately accounted for during kriging. Drill holes
intersecting the mineralized zone at an angle less than 15 degrees were
discarded, as well as those holes or underground samples that did not
intersect the entire width of the mineralized zone.
    The qualified person responsible for the Grevet B mineral resource
estimate is Bernard Salmon, Eng. of Scott Wilson RPA. Scott Wilson RPA carried
out mineral resource estimation for the Grevet B deposit using 3D block
modeling. A total of six lenses were interpreted, namely No. 1, No. 2, No. 2
North, No. 3, No. 3 North and No. 3 South. The Grevet B mineralization
contains significant values for three elements: zinc, copper and silver. An
NSR value was determined by the Company for each metal unit. These metal units
were then used to calculate the NSR value of each sample interval while
defining the resource envelopes, and of each mineralized block while
determining the resource estimates. Zn, Cu, and Ag grades of each sample have
been converted into dollar values based on the smelter parameter. The minimum
mining width used for interpretation of the lenses is 2.0 metres. The lenses
were interpreted from drill holes projected on level plans at every 10 metres
from Elevation 2980 metres to Elevation 2820 metres, over a strike length of
about 300 metres. The 3D solid of each lens was created by adding tie lines to
plan views in order to create 3D tins. The Grevet B mineral resource estimate
was further classified by Donald Gervais, Chief Geologist, Langlois mine into
mineral reserves and mineral resources following the receipt of the
Certificate of Authorization from the Ministère du Développment duarable, de
l'Environnment et des Parcs for the Grevet B mine.

    Forward-looking Statements

    The information in this news release has been prepared as at June 30,
2007. Certain information included in this news release constitute
"forward-looking statements". The words "expect", "will", "intend", "estimate"
and similar expressions identify forward-looking statements. Forward-looking
statements are necessarily based upon a number of estimates and assumptions
that, while considered reasonable by management, are inherently subject to
significant business, economic and competitive uncertainties and
contingencies. The Company cautions the reader that such forward-looking
statements involve known and unknown risks, uncertainties and other factors
that may cause the actual results, performance or achievements of the Company
to be materially different from the Company's estimated future results,
performance or achievements expressed or implied by those forward-looking
statements and the forward-looking statements are not guarantees of future
performance. These risks, uncertainties and other factors include, but are not
limited to, risks associated with the mining industry such as government
regulation, environmental and reclamation risks, title disputes or claims,
success of mining activities, future commodity prices, costs of production,
possible variation in mineral reserves, mineral resources, grade or recovery
rates, failure of plant, equipment or processes to operate as anticipated,
accidents, labour disputes, the timing of estimated future production, capital
expenditures, financial market fluctuations, requirements for additional
capital, conclusions of economic evaluations, limitations on insurance
coverage, risks associated with using third-party contractors, inflation as
well as those factors discussed in the Company's most recent Form 40-F/Annual
Information Form on file with the SEC and Canadian provincial securities
regulatory authorities.
    The Company disclaims any intention or obligation to update or revise any
forward-looking statements whether as a result of new information, future
events or otherwise, except as required by applicable law.





For further information:

For further information: Torben Jensen, P.Eng., Vice President,
Engineering, (416) 363-4798 Ext. 232, TJensen@breakwater.ca; or Ann Wilkinson,
Vice President, Investor Relations, (416) 363-4798 Ext. 277,
AWilkinson@breakwater.ca

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