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Duluth Metals Highlights 153.5 Feet Of 0.767% Copper, 0.197% Nickel And 1.988 Grams Total Precious Metals At Twin Metals Minnesota's Birch Lake Deposit

TORONTO, November 27, 2012 /PRNewswire/ --

  • Drill results of an additional 28 holes (BL11-01 to BL12-21) in the Birch Lake Deposit of Twin Metals Minnesota
  • The 28 drill holes from the Birch Lake Deposit which are featured in this press release will be factored into the final pre-feasibility AMEC resource numbers due early December 2012; this is in addition to the 159 additional drill holes and 70 wedge offsets for the Maturi Deposit
  • The final AMEC resource report will provide the basis for mine planning within the pre-feasibility study. Duluth Metals also expects the new estimate will confirm the extent and distribution of the higher grade portions of the deposit

Duluth Metals Limited ("Duluth Metals") (TSX: DM) (TSX: DM.U) is pleased to announce assay results for 28 holes on the Birch Lake Deposit within the Twin Metals Minnesota Project in northeastern Minnesota. The Birch Lake Deposit is one of three mineral resources in close proximity to one another within the Twin Metals Minnesota Project, these being the Maturi, Birch Lake and Spruce Road Deposits.  All of the holes have significant length intercepts continuing to indicate a higher grade platinum+palladium+gold (TPM) content within the Birch Lake resource relative to other resources in the project. These additional holes will be incorporated into the final resource estimate to be issued by AMEC in early December 2012.

"The addition of these holes to the Birch Lake database will provide the basis for a stronger estimate in the western part of the Twin Metals Minnesota Project. The Birch Lake resource provides potential flexibility in the project as it is geographically separate (5 miles) from Maturi, and shows a higher contribution to revenue from precious metals than some of the other sections in the project," stated Vern Baker, President of Duluth Metals.

Drilling highlights in the Birch Lake Deposit include:

  • BL11-07-W1 returned a 153.5 foot intersection of 0.767% copper, 0.197% nickel, 3.0 g/t silver and 1.988 grams TPM (TPM = Platinum+Palladium+Gold) at a 0.5% Cu cut-off.
  • BL11-05 returned a 67.5 foot intersection of 0.710% copper, 0.230% nickel, 2.5 g/t silver and 1.817 grams TPM at a 0.5% Cu cut-off.
  • BL12-09 returned a 101.3 foot intersection of 0.862% copper, 0.273% nickel, 3.0 g/t silver and 1.237 grams TPM at a 0.5% Cu cut-off.
  • BL12-10 returned a 53 foot intersection of 0.638% copper, 0.182% nickel, 2.3 g/t silver and 1.158 grams TPM at a 0.5% Cu cut-off.

Figure 1 is a map illustrating the location of 28 drill holes reported in this press release which can be found on the Company website under this press release at http://www.duluthmetals.com.

A more detailed summary of the assay results for BL11-01 to BL12-21 as grouped by areas can be found in the table below. True thickness is estimated at about 90% of core length:

 
       Hole          Zone        From    To  Length  Cu    Ni    TPM
                                 (ft)   (ft)  (ft)   (%)   (%)  (g/t)
     BL11-01   @0.3% Cu cut-off    2258 2333     75 0.393 0.169 2.689
     BL11-02   @0.3% Cu cut-off    2503 2573     70 0.418 0.134 0.311
     BL11-03   @0.5% Cu cut-off    2353 2578    225 0.651 0.194 0.781
     BL11-04   @0.5% Cu cut-off  2536.5 2588   51.5 0.606 0.225 0.941
     BL11-05   @0.5% Cu cut-off  2720.5 2788   67.5 0.710 0.230 1.817
     BL11-06   @0.3% Cu cut-off    2428 2543    115 0.437 0.113 0.401
               @0.5% Cu cut-off    2358 2398     40 0.607 0.190 0.572
    BL11-07-W1 @0.5% Cu cut-off  2303.5 2457  153.5 0.767 0.197 1.988
     BL11-08   @0.3% Cu cut-off  1718.5 1772   53.5 0.406 0.147 0.366
     BL12-01   @0.3% Cu cut-off    2672 2817    145 0.522 0.125 0.914
               @0.5% Cu cut-off    2692 2802    110 0.590 0.132 1.050
     BL12-02   @0.5% Cu cut-off    2477 2602    125 0.599 0.161 1.097
     BL12-03   @0.3% Cu cut-off    2397 2452     55 0.339 0.140 0.438
     BL12-04   @0.5% Cu cut-off  2527.7 2632  104.3 0.623 0.165 0.668
     BL12-05   @0.3% Cu cut-off  1839.5 1977  137.5 0.395 0.142 0.325
     BL12-07           No Significant Mineralized Intercepts
     BL12-08   @0.5% Cu cut-off    2202 2292     90 0.570 0.184 0.386
     BL12-09   @0.3% Cu cut-off  2475.7 2647  171.3 0.704 0.220 0.907
               @0.5% Cu cut-off  2475.7 2577  101.3 0.862 0.273 1.237
     BL12-10   @0.3% Cu cut-off    2146 2277    131 0.488 0.170 0.751
               @0.5% Cu cut-off    2198 2251     53 0.638 0.182 1.158
     BL12-11   @0.3% Cu cut-off  2341.1 2467  125.9 0.442 0.161 0.653
     BL12-12   @0.5% Cu cut-off    2601 2731    130 0.622 0.191 0.577
     BL12-13   @0.3% Cu cut-off  1605.5 1912  306.5 0.409 0.144 0.270
     BL12-14   @0.3% Cu cut-off    2352 2432     80 0.449 0.225 0.216
     BL12-15   @0.3% Cu cut-off    2416 2536    120 0.447 0.139 0.483
     BL12-16   @0.3% Cu cut-off    2402 2582    180 0.476 0.298 0.246
     BL12-17   @0.3% Cu cut-off    2426 2527    101 0.448 0.146 0.868
     BL12-18   @0.3% Cu cut-off    2327 2407     80 0.456 0.142 0.833
     BL12-19   @0.3% Cu cut-off  1704.5 1892  187.5 0.653 0.233 0.380
               @0.5% Cu cut-off  1704.5 1867  162.5 0.700 0.228 0.413
     BL12-20   @0.3% Cu cut-off    2233 2308     75 0.466 0.153 0.633
     BL12-21   @0.5% Cu cut-off 2203.25 2307 103.75 0.583 0.204 0.376

(*TPM = Platinum+Palladium+Gold) 

Complete gold, platinum, palladium, silver and cobalt assays for BL11-01 to BL12-21 are as follows:

 
       Hole        Zone       From    To  Length  Pt    Pd    Au    Co    Ag
                              (ft)   (ft)  (ft)  (g/t) (g/t) (g/t)  (%)  (g/t)
                 @0.3% Cu
     BL11-01      cut-off       2258 2333     75 0.901 1.567 0.221 0.013   1.4
                 @0.3% Cu
     BL11-02      cut-off       2503 2573     70  0.08 0.181 0.050 0.011   1.3
                 @0.5% Cu
     BL11-03      cut-off       2353 2578    225 0.204 0.473 0.105 0.012   2.4
                 @0.5% Cu
     BL11-04      cut-off     2536.5 2588   51.5 0.274 0.562 0.105 0.011   2.1
                 @0.5% Cu
     BL11-05      cut-off     2720.5 2788   67.5 0.510 1.115 0.192 0.009   2.5
                 @0.3% Cu
     BL11-06      cut-off       2428 2543    115 0.155 0.190 0.056 0.011   1.7
                 @0.5% Cu
                  cut-off       2358 2398     40 0.147 0.340 0.085 0.010   2.1
                 @0.5% Cu
    BL11-07-W1    cut-off     2303.5 2457  153.5 0.595 1.118 0.275 0.013   3.0
                 @0.3% Cu
     BL11-08      cut-off     1718.5 1772   53.5 0.115 0.200 0.051 0.012   1.2
                 @0.3% Cu
     BL12-01      cut-off       2672 2817    145 0.250 0.559 0.105 0.008   1.6
                 @0.5% Cu
                  cut-off       2692 2802    110 0.285 0.645 0.120 0.008   1.8
                 @0.5% Cu
     BL12-02      cut-off       2477 2602    125 0.277 0.644 0.177 0.009   2.4
                 @0.3% Cu
     BL12-03      cut-off       2397 2452     55 0.126 0.259 0.053 0.009   1.2
                 @0.5% Cu
     BL12-04      cut-off     2527.7 2632  104.3 0.174 0.395 0.099 0.011   2.0
                 @0.3% Cu
     BL12-05      cut-off     1839.5 1977  137.5 0.089 0.185 0.052 0.010   1.2
     BL12-07                No Significant Mineralized Intercepts
                 @0.5% Cu
     BL12-08      cut-off       2202 2292     90 0.102 0.219 0.065 0.010   1.7
                 @0.3% Cu
     BL12-09      cut-off     2475.7 2647  171.3 0.256 0.533 0.119 0.012   2.5
                 @0.5% Cu
                  cut-off     2475.7 2577  101.3 0.360 0.715 0.163 0.014   3.0
                 @0.3% Cu
     BL12-10      cut-off       2146 2277    131 0.231 0.417 0.103 0.010   1.7
                 @0.5% Cu
                  cut-off       2198 2251     53 0.372 0.624 0.163 0.008   2.3
                 @0.3% Cu
     BL12-11      cut-off     2341.1 2467  125.9 0.194 0.388 0.071 0.011   1.5
                 @0.5% Cu
     BL12-12      cut-off       2601 2731    130 0.142 0.347 0.087 0.009   2.1
                 @0.3% Cu
     BL12-13      cut-off     1605.5 1912  306.5 0.066 0.156 0.047 0.010   1.6
                 @0.3% Cu
     BL12-14      cut-off       2352 2432     80 0.059 0.132 0.024 0.013   0.8
                 @0.3% Cu
     BL12-15      cut-off       2416 2536    120 0.130 0.286 0.067 0.009   1.1
                 @0.3% Cu
     BL12-16      cut-off       2402 2582    180 0.068 0.144 0.034 0.016   0.6
                 @0.3% Cu
     BL12-17      cut-off       2426 2527    101 0.231 0.523 0.114 0.010   1.8
                 @0.3% Cu
     BL12-18      cut-off       2327 2407     80 0.254 0.468 0.111 0.009   1.6
                 @0.3% Cu
     BL12-19      cut-off     1704.5 1892  187.5 0.095 0.230 0.055 0.012   2.1
                 @0.5% Cu
                  cut-off     1704.5 1867  162.5 0.103 0.250 0.060 0.011   2.3
                 @0.3% Cu
     BL12-20      cut-off       2233 2308     75 0.180 0.379 0.073 0.010   1.1
                 @0.5% Cu
     BL12-21      cut-off    2203.25 2307 103.75 0.101 0.218 0.058 0.013   2.0

The Twin Metals Minnesota Project covers over 32,000 acres of land/mineral interests and consolidates the largest base and precious metal land position in Minnesota. This extensive land position provides Twin Metals with the platform to plan and develop one of the world's largest copper-nickel-PGM deposits within a new emerging mining belt in Minnesota, USA.

For the 2011-2012 Birch Lake Drill Program, half core samples were prepared at ALS Minerals laboratories in Thunder Bay and then shipped to its analytical facilities in Vancouver. Samples are being analyzed for Au, Pt, and Pd using a 30g standard fire assay with an ICP-AES finish and for 33 other elements using a four acid (near total) digestion and a combination of ICP-MS and ICP-AES. ICP over-limits for copper and nickel are re-analyzed using dissolution four acid (near total) digestion followed by ICP-AES or AAS. The remaining half core samples are being stored in Minnesota.

Phillip Larson, P. Geo. is the Qualified Person for Duluth Metals and Senior Geologist for Duluth Metals, in accordance with NI 43-101 of the Canadian Securities Administrators, and is responsible for Duluth Metals technical content of this press release and quality assurance of the exploration data and analytical results.

About Duluth Metals Limited

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