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
| 27 Nov 2012 09:18 ET |
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CNW Group
-- 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 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 2.689BL11-02 @0.3% Cu cut-off 2503 2573 70 0.418 0.134 0.311BL11-03 @0.5% Cu cut-off 2353 2578 225 0.651 0.194 0.781BL11-04 @0.5% Cu cut-off 2536.5 2588 51.5 0.606 0.225 0.941BL11-05 @0.5% Cu cut-off 2720.5 2788 67.5 0.710 0.230 1.817BL11-06 @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 0.572BL11-07-W1 @0.5% Cu cut-off 2303.5 2457 153.5 0.767 0.197 1.988BL11-08 @0.3% Cu cut-off 1718.5 1772 53.5 0.406 0.147 0.366BL12-01 @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 1.050BL12-02 @0.5% Cu cut-off 2477 2602 125 0.599 0.161 1.097BL12-03 @0.3% Cu cut-off 2397 2452 55 0.339 0.140 0.438BL12-04 @0.5% Cu cut-off 2527.7 2632 104.3 0.623 0.165 0.668BL12-05 @0.3% Cu cut-off 1839.5 1977 137.5 0.395 0.142 0.325BL12-07 No Significant Mineralized InterceptsBL12-08 @0.5% Cu cut-off 2202 2292 90 0.570 0.184 0.386BL12-09 @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 1.237BL12-10 @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 1.158BL12-11 @0.3% Cu cut-off 2341.1 2467 125.9 0.442 0.161 0.653BL12-12 @0.5% Cu cut-off 2601 2731 130 0.622 0.191 0.577BL12-13 @0.3% Cu cut-off 1605.5 1912 306.5 0.409 0.144 0.270BL12-14 @0.3% Cu cut-off 2352 2432 80 0.449 0.225 0.216BL12-15 @0.3% Cu cut-off 2416 2536 120 0.447 0.139 0.483BL12-16 @0.3% Cu cut-off 2402 2582 180 0.476 0.298 0.246BL12-17 @0.3% Cu cut-off 2426 2527 101 0.448 0.146 0.868BL12-18 @0.3% Cu cut-off 2327 2407 80 0.456 0.142 0.833BL12-19 @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 0.413BL12-20 @0.3% Cu cut-off 2233 2308 75 0.466 0.153 0.633BL12-21 @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)BL11-01 @0.3% Cu 2258 2333 75 0.901 1.567 0.221 0.013 1.4 cut-offBL11-02 @0.3% Cu 2503 2573 70 0.08 0.181 0.050 0.011 1.3 cut-offBL11-03 @0.5% Cu 2353 2578 225 0.204 0.473 0.105 0.012 2.4 cut-offBL11-04 @0.5% Cu 2536.5 2588 51.5 0.274 0.562 0.105 0.011 2.1 cut-offBL11-05 @0.5% Cu 2720.5 2788 67.5 0.510 1.115 0.192 0.009 2.5 cut-offBL11-06 @0.3% Cu 2428 2543 115 0.155 0.190 0.056 0.011 1.7 cut-off @0.5% Cu 2358 2398 40 0.147 0.340 0.085 0.010 2.1 cut-offBL11-07-W1 @0.5% Cu 2303.5 2457 153.5 0.595 1.118 0.275 0.013 3.0 cut-offBL11-08 @0.3% Cu 1718.5 1772 53.5 0.115 0.200 0.051 0.012 1.2 cut-offBL12-01 @0.3% Cu 2672 2817 145 0.250 0.559 0.105 0.008 1.6 cut-off @0.5% Cu 2692 2802 110 0.285 0.645 0.120 0.008 1.8 cut-offBL12-02 @0.5% Cu 2477 2602 125 0.277 0.644 0.177 0.009 2.4 cut-offBL12-03 @0.3% Cu 2397 2452 55 0.126 0.259 0.053 0.009 1.2 cut-offBL12-04 @0.5% Cu 2527.7 2632 104.3 0.174 0.395 0.099 0.011 2.0 cut-offBL12-05 @0.3% Cu 1839.5 1977 137.5 0.089 0.185 0.052 0.010 1.2 cut-offBL12-07 No Significant Mineralized InterceptsBL12-08 @0.5% Cu 2202 2292 90 0.102 0.219 0.065 0.010 1.7 cut-offBL12-09 @0.3% Cu 2475.7 2647 171.3 0.256 0.533 0.119 0.012 2.5 cut-off @0.5% Cu 2475.7 2577 101.3 0.360 0.715 0.163 0.014 3.0 cut-offBL12-10 @0.3% Cu 2146 2277 131 0.231 0.417 0.103 0.010 1.7 cut-off @0.5% Cu 2198 2251 53 0.372 0.624 0.163 0.008 2.3 cut-offBL12-11 @0.3% Cu 2341.1 2467 125.9 0.194 0.388 0.071 0.011 1.5 cut-offBL12-12 @0.5% Cu 2601 2731 130 0.142 0.347 0.087 0.009 2.1 cut-offBL12-13 @0.3% Cu 1605.5 1912 306.5 0.066 0.156 0.047 0.010 1.6 cut-offBL12-14 @0.3% Cu 2352 2432 80 0.059 0.132 0.024 0.013 0.8 cut-offBL12-15 @0.3% Cu 2416 2536 120 0.130 0.286 0.067 0.009 1.1 cut-offBL12-16 @0.3% Cu 2402 2582 180 0.068 0.144 0.034 0.016 0.6 cut-offBL12-17 @0.3% Cu 2426 2527 101 0.231 0.523 0.114 0.010 1.8 cut-offBL12-18 @0.3% Cu 2327 2407 80 0.254 0.468 0.111 0.009 1.6 cut-offBL12-19 @0.3% Cu 1704.5 1892 187.5 0.095 0.230 0.055 0.012 2.1 cut-off @0.5% Cu 1704.5 1867 162.5 0.103 0.250 0.060 0.011 2.3 cut-offBL12-20 @0.3% Cu 2233 2308 75 0.180 0.379 0.073 0.010 1.1 cut-offBL12-21 @0.5% Cu 2203.25 2307 103.75 0.101 0.218 0.058 0.013 2.0 cut-off
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 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.