Constantine reports 14 metre copper and zinc rich intercept from Palmer project, Alaska



    - 3.79% Copper 7.24% Zinc, 0.374 g/t Gold and 47.03g/t Silver
    over 14 metres -

    TORONTO STOCK EXCHANGE SYMBOL: RMX
    AMEX SYMBOL: RBY

    VANCOUVER, Sept. 26 /CNW/ - Constantine Metal Resources (CEM.TSX-V),
owned 16.9% (3.16 million shares) by Rubicon Minerals Corporation
(RMX.TSX:RBY.AMEX), has reported that:

    "White Rock, B.C. - Constantine Metal Resources Ltd (TSX Venture- CEM)
(the "Company") is pleased to announce partial analytical results for 1 drill
hole at the ongoing 2007 drilling program on its polymetallic massive sulphide
Palmer project near Haines, Alaska. The 2007 Palmer drilling program started
in late July and to date more than 6000 ft (greater than 1800m) of drilling
has been completed in 6 holes. Partial assay results have been received for
hole CMR07-07; all other assay results are pending.
    Hole CMR07-07 intersected 45.90 ft (14.0m) of 3.79% Cu, 7.24% Zn, 0.374
g/t Au, 47.03g/t Ag. The intersection can be divided into an upper zinc zone;
14.30 ft (4.4m) - 13.60% Zn, 0.65% Cu, 0.153 g/t Au, 17.80 g/t Ag and a
contiguous underlying copper zone; 31.60 ft (9.6m) 5.22% Cu, 4.36% Zn, 0.474
g/t Au, 60.26 g/t Ag. The estimated true width of the intersection is
approximately 85-90% of the core length. The intersection is on the Glacier
Creek prospect and is located in the footwall to the RW Zone at base of the RW
rhyolite. It represents a third stacked high grade mineralized horizon (RW2)
that can be tested with surface drilling.
    The CMR07-07 high grade intersection is located 230 ft (70m) west of the
2006 intersection in CMR06-01 (16.8 ft (5.12m) of 10.86% Zn, 0.13% Pb, 0.23%
Cu, 0.134 g/t Au and 44.4 g/t silver) and about 230 ft (70m) east of a 36 ft
(11m) interval of rhyolite hosted massive pyrite stringers at the base of the
RW horizon (0.81% Zn and 0.15% Cu) in CMR06-03. Two drill holes were completed
from the CMR07-07 drill site in 2007. The second hole (CMR07-08) intersected
the same mineralized horizon as CMR07-07, in an 83 ft (25.3m) wide zone of
leached barite, oxidized sulphides. This intercept is approximately 165 ft (50
m) updip from the CMR07-07 intercept towards the oxidized surface exposure of
the zone. Assays for the CMR-07-08 intercept are pending.
    The RW and the RW2 zones are separated by the RW rhyolite that varies
from 0 to a maximum indicated thickness of 180 ft (55m). In the absence of the
RW rhyolite, the RW and RW2 zones become a single sulphide horizon which
appears to be the case with the 2006 intersection in CMR06-01. The RW and RW2
zones remain open to the east and west and down dip to the northwest and
northeast.
    At the Cap prospect target, two holes (aggregate of 2204 ft) were drilled
to test for strike extensions and metal zonation relative to historic
(pre-Constantine) drill intercepts of 76.1 ft (23.2m) in Cap-01 of 134 ppm Ag
(3.91 oz/t), 0.24% Zn, 0.16% Pb and 297.2 ft (90.6m) in RMC98-01 of 31 ppm Ag
(0.90 oz/t), that includes 35.8 ft (10.9m) of 62 ppm Ag (1.81 oz/t), 0.19 ppm
Au, 0.21% Zn. The Constantine holes (CMR07-04 and CMR07-05) indicate
continuity of mineralization and alteration.
    The remaining four, 2007 holes completed to date (including CMR07-07 and
CMR07-08 discussed above) are located at the Glacier Creek prospect, testing
the RW (and RW2), Main and South Wall targets. The drill is currently
operating at a lower elevation drill site, 1640 ft (500m) east of the CMR07-07
drill pad where it is testing the RW-RW2, Main zone and South Wall horizons.
One hole has been completed at this site (CMR07-09) and a second hole
(CMR07-10) is in progress. CMR07-10 is expected to be the final hole of the
2007 drill program."

    Please refer to the news release of Constantine Metals Resources or its
website (www.constantine.com) for further details.

    RUBICON MINERALS CORPORATION

    "David W. Adamson"
    President & CEO


    Notes:

    Text, sample preparation and QP information reproduced from Constantine
news release with the permission of Constantine Metal Resources.
    "Samples of drill core were cut by a diamond blade rock saw, with half of
the cut core placed in individual sealed polyurethane bags and half placed
back in the original core box for permanent storage. Samples were either
shipped by truck from Whitehorse to an ALS Chemex prep lab in Terrace where
pulped samples are then shipped to Als Chemex or alternately, samples are
shipped directly by air freight in sealed woven plastic bags to ALS-Chemex
laboratories in North Vancouver. ALS Chemex laboratories operate according to
the guidelines set out in ISO/IEC Guide 25 Gold was determined by fire-assay
fusion of a 30 g sub-sample with atomic absorption spectroscopy (AAS). Various
metals including silver, gold, copper, lead and zinc were analyzed by
inductively-coupled plasma (ICP) atomic emission spectroscopy, following
multi-acid digestion. The elements copper, lead and zinc were determined by
ore grade assay for samples that returned values greater than 10,000 ppm by
ICP analysis.
    The 2007 exploration program for the Palmer project is managed by J.
Garfield MacVeigh, President and CEO of Constantine Metal Resources Ltd. and
qualified person as defined by Canadian National Instrument 43-101."

    Forward Looking Statement
    -------------------------
    This news release contains certain statements that may be deemed
"forward-looking statements". All statements in this release, other than
statements of historical fact, that address events or developments that the
Company expects to occur, are forward looking statements. Forward looking
statements are statements that are not historical facts and are generally, but
not always, identified by the words "expects", "plans", "anticipates",
"believes", "intends", "estimates", "projects", "potential" and similar
expressions, or that events or conditions "will", "would", "may", "could" or
"should" occur. Forward-looking statements in this document include statements
regarding future exploration programs and joint venture partner participation.
    Although the Company believes the expectations expressed in such
forward-looking statements are based on reasonable assumptions, such
statements are not guarantees of future performance and actual results may
differ materially from those in the forward-looking statements. Factors that
could cause the actual results to differ materially from those in
forward-looking statements include market prices, exploitation and exploration
successes, continued availability of capital and financing, inability to
obtain required shareholder or regulatory approvals, and general economic,
market or business conditions. Investors are cautioned that any such
statements are not guarantees of future performance and actual results or
developments may differ materially from those projected in the forward-looking
statements. Forward looking statements are based on the beliefs, estimates and
opinions of the Company's management on the date the statements are made. The
Company undertakes no obligation to update these forward-looking statements in
the event that management's beliefs, estimates or opinions, or other factors,
should change.
    These statements are based on a number of assumptions, including, among
others, assumptions regarding general business and economic conditions, the
timing of the receipt of shareholder, regulatory and governmental approvals
for Rubicon's proposed transactions, the availability of financing for
Rubicon's proposed transactions and exploration and development programs on
reasonable terms and the ability of third-party service providers to deliver
services in a timely manner. The foregoing list of assumptions is not
exhaustive. Events or circumstances could cause results to differ materially.

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    The Toronto Stock Exchange has not reviewed and does not accept
    responsibility for the adequacy or accuracy of this release.

    %SEDAR: 00009365E          %CIK: 0001057791




For further information:

For further information: Bill Cavalluzzo, Vice President-Investor
Relations, Toll free at 1-866-365-4706 or by E-mail at:
bcavalluzzo@rubiconminerals.com


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