Northern Finland Ore Potential Project
2011-2015
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Where are we and What do we do ?
GTK
Geoscience
Exploration
Discovery
Development
Production
Mining Companies
Universities
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Juniors
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Project History
•
•
Project roots are in 2011, when GTK launched two year Northern
Finland Mineral Potential Evaluation Project (2011-2012)
That was reconnaissance scale stage:
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Where are ”new” mineral potential areas ?
Why area might have mineral potential ?
How will we study mineral potential ?
”Rules” For Area Selection
• No areal competition with exploration and
mining companies !
• Focus in ”new” and ”unexplored” areas !
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Exploration and research level based on drillings
Drillholes from GTK database
Saamian homeland and
special reindeer herding area
Special reindeer herding area
Reindeer herding area
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Selected Area (1)
1.
Enontekiö, Käsivarsi:
 Large unexplored greenstone areas between
Sweden and Norway
 Several unexplored mafic-ultramafic bodies
and possibilities to find new ones
 Major deformation zones cut study
area
 Historical exploration (e.g., drilling) were
mainly focused to Ruossakero and
Sarvisoaivi Ni deposits
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Selected Area (2)
Drillhole from GTK database
Project area
2. Central Lapland Granitoid Complex and
surrounding schist belts:
 Poorly explored ~ ”Big Unknown”
 Not only poor granitoids (e.g., aeromagnetic
map is not monotonous)
 Surrounding schist belts highly procpective
(e.g., Rompas area)
 Several mafic intrusives were located by
GTK (e.g., Appinites)
 Limited exploration drilling were carried
out
Aeromagnetic basemap
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General Results of Mineral Potential Evaluation project
 Old available data (reports, geochemistry, drillholes, geophysics and boulder) checked and
re-analyzed from selected areas
 Some targets were tested by drilling in both selected areas and ground geophysics surveys
were carried out in several areas
 TEM flights were carried out in Enontekiö and Savukoski areas during Green Mining
Project
 Based on the evaluation project a new three year project was established:
 Northern Finland Mineral Potential Project (2013-2014) and
Since 2015 Northern Finland Ore Potential Project
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Geological results of Mineral Potential Evaluation project
1. Enontekiö, Käsivarsi:
• Large scale alteration in Paleoproterozoic greenstones (e.g., scapolite, albite, carbonate)
• Geological similarities with Cu-Au-Fe deposits in Sweden and Norway
• New prospective mafic-ultramafic bodies and extensions of known bodies
• Lots of interesting geophysical anomalies
Käsivarsi 14 m 0.1 Co %, 0.3 % Cu,
0.2 % Ni , 13 % S
Lätäseno 5 m 1.9 % Cu
2. Central Lapland Granitoid Complex and surrounding schist belts:
• Granitoid Complex is not monotonous (see geophysical maps)
• Fairly horizontally positioned granitoids cover other rocks
• Several areas host interesting Au anomalies in till
• Surrounding schist belts unexplored with modern methods and include lot of indications:
 Ore boulders (Cu-W-Au-Mo)
 Alteration (skarns and antophyllite-cordierite-biotite rocks)
 Mafic-ultramafic bodies
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NEW PGE-REEF MINERALIZATION OF THE SOTKAVAARA
PYROXENITE INTRUSION, ROVANIEMI, NORTHERN FINLAND
Published:
Törmänen, T., Konnunaho, J., Karinen., Lehtonen., M., Huovinen, I. 2014. New PRE-REEF Mineralization
Of The Sotkavaara Pyroxenite Intrusion, Rovaniemi, Northern Finland. 12th International Platinum Symposium 11-14 August 2014
Yekaterinburg, Russia., P. 212-214
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Reports of Mineral Potential Evaluation project
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Northern Finland Mineral Potential Project (2013-2014) and
Since 2015 Northern Finland Ore Potential Project
• As mentioned earlier GTK started a new project in 2013
• Project focuses in two areas based on results and recommendations of previous project
Enontekiö, Käsivarsi
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Rovaniemi, Kuluskaira
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Enontekiö, Käsivarsi
No permissions for geological research as drilling
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…So we have focused on updating the digital geological map of the area
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Rovaniemi, Kuluskaira
Key points:
• About 60 x 20 km weakly explored area
• Poorly understood geology
• Only light exploration has been done (drilling, geochemical sampling and geophysics)
• Favourable geology (e.g., strongly altered greenstones and mafic intrusions)
• Ore indications as W-Cu-Mo-Au boulders
• Easy access from Rovaniemi
Project task:
• Compilation of historical Geo-data
• Start to collect new Geo-data:
 Geochemical till sampling
 Ground geophysical and aerogeophysical measurements are needed (e.g., TEM)
 Drilling (e.g., target testing and profile drillings)
 Report results and data
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Summary
• GTK’s Ore Potential Projects produce new Geo-data from unexplored areas for companies
and GTK’s other projects use (e.g., modelling projects)
• This is project’s last year and future plans are still open
• There are several large sized areas for Grassroot to Greenfield exploration in Käsivarsi area, as well
as in Central-Lapland granitoid Complex area and surrounding schist belts (e.g., Kuluskaira). These
areas are promising for Ni-Cu-Co-PGE, IOCG, Cu-W-Mo and Cu-Au deposits for example.
• In most of the areas drilling, geochemistry and modern geophysical surveys are recommended,
because base mapping have already been done by GTK, Rautaruukki and Outokumpu Oy
• Biggest challenges are permits, especially in the Enontekiö area.
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Thanks For Attention
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