"The drilling of stratiform sulphides on our first drill hole below the mine workings at Fredriksson Gruvan is of great importance, as it most assuredly confirms the continuity of the mineralization at depth below the old mine". Stated
Ongoing diamond drilling at Fredriksson Gruva will test the continuity of massive sulphide mineralization below the historical mine workings where recent 3D geological modeling demonstrates that silver-zinc-lead mineralization could extend to at least 400 meters depth.
Visual core inspection by Norden's Senior technical staff confirms that GUM-20-09 intersected an 11m massive to semi-massive sulphide body of mineralization extending from 123m to 134m. Drill core is currently being cut and sampled. Samples will be shipped to ALS in Malå,
Drill Hole: GUM-20-09
Geological observations of the core confirm Norden's preliminary interpretation that precious metal enriched base metal mineralization at Fredrikssons Gruvan belongs to the Broken Hill Type ore deposit clan.
Significant observations from GUM 20-09 that are suggestive of BHT style mineralization include:
OBSERVATION | SIGNIFICANCE |
Stratiform Zn-Pb mineralization; variably tectonically | Broken Hill-Type deposits are dominated by stratiform mineralization, |
Mineralization is pyrite-poor, sphalerite-galena rich | BHT deposits tend to be pyrite-poor and sphalerite-galena rich |
Hosted by garnet-rich metamorphosed sedimentary | BHT deposits form in association with stratabound garnet- and |
Intimate association with magnetite iron formation. | BHT stratiform sulfide deposits are commonly associated with |
Garnet within the mineralized interval is orange- | Many BHTs are relatively manganese (Mn)-rich. |
Association with calc-silicates: some calc-silicate | Some BHT deposits, including the type example at Broken Hill, |
Paucity of intense Mg-rich alteration and intensely | This suggests that the mineralization is not a Volcanogenic Massive |
Metamorphism is amphibolite grade | BHT deposits almost invariably occur in host successions that have |
Host succession is Paleo- to Meso-Proterozoic in age | BHT deposits appear to be restricted to host successions of Paleo- to |
Figure 1. Oblique 3D interpretation of mineralization at Fredriksson Gruvan showing the location of the 11.00 meters of semi and massive sulphide mineralization in hole GUM-20-09. Note that the mineralization is interpreted to extend beyond the limits of historical drilling at depth and laterally.
About Fredriksson Gruvan (
Fredriksson Gruvan was discovered in 1976 by
1Spry, Paul & Teale, Graham & Steadman, Jeffrey. 2009. Classification of Broken Hill-Type Pb-Zn-Ag Deposits: A Refinement. AGU Spring Meeting Abstracts. |
2 |
3Beeson, Robert. (1990). Broken Hill-type lead-zinc deposits - an overview of their occurrence and geological setting. |
4Walters S.G. 1998. Broken Hill-Type deposits. |
About Norden Crown Metals Corp.
Norden Crown is a mineral exploration company focused on the discovery of silver, zinc, copper, and gold deposits in exceptional, historical mining project areas spanning
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On behalf of Norden Crown Metals Corp.
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