Sirkka kaivos

Transcription

Sirkka kaivos

Mineral Deposit Report
Page 1 OF 17
Geological Survey of Finland
9/29/2015
Sirkka
Alternative names:
deposit
Occurence type:
Commodity
Rank
Total Measure
Total Production
gold
1
0.21 t
0.01 t
0.20 t
cobalt
2
265.20 t
15.20 t
250.00 t
copper
2
997.52 t
47.52 t
950.00 t
nickel
2
885.04 t
85.04 t
800.00 t
silver
3
Easting EUREF:
404456
Easting YKJ:
3404590
Northing EUREF:
7523917
Northing YKJ:
7527061
Discovery year:
1939
Province:
Kittilä (Au, Cu)
District:
Sirkka (Cu, Au, Ni, Co)
Comments:
Discovery of an auriferous boulder at the mouth of the River
Levijoki, west of the village of Sirkka, in 1939 led the prospectors
Reference:
to the mineralised area.
2,6,9,15
Mineral deposit type
Group:
Metallogenic deposit
Main type:
Orogenic (metamorphic hydrothermal)
Sub type1:
Sub type2:
Comments:
Clearly epigenetic, "mesothermal" mineralisation with a distinct structural control. Although, the
reference is written to support a late-magmatic model.
References:
13,14,15,17
Dimension
Expression:
exposed
Area (ha):
Form:
discordant
Dip azim:
180
Shape:
irregular
Dip:
85
Length (m):
1500
Plunge azim:
Width (m):
150
Plunge dip:
Thickness (m):
Orientation method:
Depth (m):
1
NA
Total Resource
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Dimension comments:
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Six gold-bearing lodes along the the Sirkka Line shear zone: 40-200 m long, 1-6 m wide,
apparently subvertical, all open at depth of 30–60 m.
Holder history
Current holder:
Sakumpu Exploration Oy
Years:
Holding type:
Reservation
Company
Magnus Minerals Oy
Years
2011-2012
Holding type
Claim reservation (old law)
Northern Lion Gold Corporation
2005-2010
Claim (old law)
Lappland Goldminers Oy
2005-2010
Claim (old law)
Oy SES Finland Ltd
NA
Outokumpu Oy
1966-1978
NA
Vuoksenniska Oy
1953-1966
NA
Atri Oy
1939-1953
NA
Figures
Lodes and drilling in the Kuukeri subarea
2
Comments
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Exploration Activity
Oy SES Finland Ltd
Years
1997-1997
Comments:
1997-1997
Comments:
Activity type
excavation
Trenching and channel sampling
core drilling
A few RC-drill holes.
Geologist
Exploration result
Alf Björklund
NA
Alf Björklund
NA
Geologist
Exploration result
Ref
16
Years
1979-1979
Comments:
Activity type
regional geophysics
Low-altitude airborne magnetic, electromagnetic and radiometric survey
Ref
key geological features
Outokumpu Oy
Years
1967-1967
Comments:
Activity type
Geologist
Exploration result
core drilling
Pauli Isokangas
Four diamond-drill holes, total 572 m.
NA
Ref
13,14
Outokumpu Oy
Years
Activity type
Geologist
Exploration result
1966-1978
detailed geology
Pauli Isokangas
NA
1966-1978
detailed geochemistry
Pauli Isokangas
NA
Activity type
Geologist
Exploration result
Ref
5,13,14,15,17,18,1
9
5,13,14,15,17,18,1
9
Vuoksenniska Oy
Years
1955-1956
1955-1956
Comments:
mining pilot
core drilling
About 70 diamond-drill holes.
NA
NA
Ref
10,13,15,17
17
Vuoksenniska Oy
Years
Activity type
1953-1966
detailed geophysics
Geologist
Exploration result
NA
Ref
10,13,15,17
Atri Oy
Years
1939-1953
Comments:
1939-1953
1939-1953
Comments:
1939-1953
Comments:
Activity type
Geologist
Exploration result
detailed geology
Birger Ohlsson
NA
Auriferous boulders in adjacent lake shores led the prospectors to the mineralised area.
excavation
Birger Ohlsson
NA
detailed geophysics
Birger Ohlsson
NA
ground magnetic and electromagnetic survey
core drilling
Birger Ohlsson
NA
About 110 diamond-drill holes.
Ref
13,14,15,17
13,14,15,17
13,14,15,17
3,13,19
Intersections:
HoleID:
From-To:
gold
0.50
Length:
0.50
8.30 ppm
From-To:
copper
HoleID:
Length:
1.95 %
N:o 54
3
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From-To:
silver
HoleID:
Length:
1.40
Length:
3.00
Length:
1.00
Length:
2.00
Length:
1.30
203.00 ppm
N:o 55
From-To:
copper
3.90 %
From-To:
gold
HoleID:
30.00 ppm
NA
From-To:
nickel
5.17 %
From-To:
cobalt
Comments:
1.82 ppm
Kuukeri vein
Figures
An exploration trench which was excavated in 1997
4
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Resources and Reserves
Most Recent:
Type:
Company:
Year:
Calc method:
Reference:
Resource
Vuoksenniska Oy
1956
Non-compliant resource estimate
11
NA
Category:
Tonnage:
gold
0.80 ppm
nickel
0.32 %
copper
0.38 %
cobalt
0.10 %
Cutoff:
NA
5
0.25 Mt
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Figures
Local geology
Regional geology
Structure
Local geology
Auriferous quartz-carbonate vein
Lodes in the Viisvitonen subarea
Ore outcrop
6
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Regional geology
Local geology
7
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Mining
Sirkka
Alternative names:
Sirkka Kuukeri
Closed
Status:
Previous status:
1953 - 1956
Operating years:
Years in production:
3
5,375.00 t
Total ore mined:
References:
4
Total production:
Product
Product measure
47.52
85.04
9.51
15.20
copper
nickel
gold
cobalt
t
t
kg
t
Other Materials:
Material Type
Material Measure
5,500.00 t
waste from mineral
metalliferous excavation
8
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Mining activity
Year
Activity type
Production
1956
Ore mined
2 375 t
Ore processed
2 375 t
underground
mining
nickel
21 t
1956
2 375 t
2 375 t
underground
mining
copper
12 t
1956
2 375 t
2 375 t
underground
mining
cobalt
4 t
1956
2 375 t
2 375 t
underground
mining
gold
2 kg
1955
2 375 t
2 375 t
underground
mining
gold
2 kg
1955
2 375 t
2 375 t
underground
mining
cobalt
4 t
1955
2 375 t
2 375 t
underground
mining
nickel
21 t
1955
2 375 t
2 375 t
underground
mining
copper
12 t
1954
2 375 t
2 375 t
underground
mining
nickel
21 t
1954
2 375 t
2 375 t
underground
mining
copper
12 t
1954
2 375 t
2 375 t
underground
mining
cobalt
4 t
1954
2 375 t
2 375 t
underground
mining
gold
2 kg
1953
2 375 t
2 375 t
underground
mining
nickel
21 t
1953
2 375 t
2 375 t
underground
mining
copper
12 t
9
Other material
waste from
mineral
metalliferous
excavation
waste from
mineral
metalliferous
excavation
waste from
mineral
metalliferous
excavation
waste from
mineral
metalliferous
excavation
waste from
mineral
metalliferous
excavation
waste from
mineral
metalliferous
excavation
waste from
mineral
metalliferous
excavation
waste from
mineral
metalliferous
excavation
waste from
mineral
metalliferous
excavation
waste from
mineral
metalliferous
excavation
waste from
mineral
metalliferous
excavation
waste from
mineral
metalliferous
excavation
waste from
mineral
metalliferous
excavation
waste from
mineral
metalliferous
excavation
1 375 t
1 375 t
1 375 t
1 375 t
1 375 t
1 375 t
1 375 t
1 375 t
1 375 t
1 375 t
1 375 t
1 375 t
1 375 t
1 375 t
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1953
2 375 t
2 375 t
underground
mining
cobalt
4 t
1953
2 375 t
2 375 t
underground
mining
gold
2 kg
10
waste from
mineral
metalliferous
excavation
waste from
mineral
metalliferous
excavation
1 375 t
1 375 t
Page 11 OF 17
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Geology
Host rock
:
Wall rock
:
Basalt, Mafic tuff, Sulphide facies banded ironstones, Komatiite, Quartz
vein, Graphite Phyllite
Quartzite
Basalt (Host rock)
Rock Type:
Volcanic rock
Proportion:
major
Grain size:
NA
Color:
NA
References:
3,7,13,15,17,18,19
Comments:
The deposit is in a E-W trending sequence of mafic metavolcanic rocks, metatuffites,
metakomatiites, graphitic phyllites and sulphide-facies iron formation.
Other Minerals:
Proportion:
Quartz
present
Ankerite
present
Siderite
present
Tourmaline
present
Mineral texture:
Ore Minerals:
Proportion:
Pyrite
major
Pyrrhotite
major
Chalcopyrite
major
Ilmenite
minor
Pentlandite
minor
Argentopentlandite
minor
Sphalerite
minor
Mackinawite
minor
Violarite
minor
Gersdorffite
minor
Rutile
minor
Cobaltite
minor
Gold
minor
Greigite
minor
Arsenopyrite
minor
Mineral texture:
Structures:
Fractured
Alteration:
Distribution:
Degree:
Relation to
mineralization:
albitic alteration
Comments:
NA
NA
Pre
Albitisation and part of carbonation may have preceded gold mineralisation, taken place before
regional deformation, as a synvolcanic, spilitic stage of alteration.
carbonate alteration
NA
Strong
Syn
sericitic alteration
NA
NA
Syn
sulphidation
NA
NA
Syn
11
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Metamorphic description:
Type:
Regional
Comments:
Facies:
Grade:
Relation to
mineralization:
NA
Min P- Max P
(kbar)
Min T- Max T (°C)
amphibolite
medium
metamorphic
metamorphic
facies
grade
Metamorphic peak during D2, thrusting during D3 was at least partly post-peak, late metamorphic;
Albite-actinolite-epidote-titanite ± chlorite.
Mafic tuff (Host rock)
Rock Type:
Volcanic rock
Proportion:
major
Grain size:
NA
Color:
NA
References:
1,3,7,13,15,17,19
Type:
Regional
Comments:
Facies:
Grade:
Relation to
Min P- Max P
(kbar)
Min T- Max T (°C)
mineralization:
medium
NA
amphibolite
metamorphic
metamorphic
facies
grade
Quartz-albite-chlorite-actinolite-ilmenite or titanite ± sericite, biotite, epidote.
Komatiite (Host rock)
Rock Type:
Volcanic rock
Proportion:
minor
Grain size:
NA
Color:
NA
References:
1,7,13,14,15,17,19
12
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Type:
Regional
Comments:
Facies:
Grade:
Relation to
Min P- Max P
(kbar)
Min T- Max T (°C)
Min P- Max P
(kbar)
Min T- Max T (°C)
mineralization:
amphibolite
medium
NA
metamorphic
metamorphic
facies
grade
Talc-chlorite-magnesite.
Sulphide facies banded ironstones (Host rock)
Rock Type:
Ironstone
Proportion:
minor
Grain size:
NA
Color:
NA
References:
1,7,12,13,15,17,19
Type:
Regional
Comments:
Facies:
Grade:
Relation to
mineralization:
NA
amphibolite
medium
metamorphic
metamorphic
facies
grade
Metamorphic peak during D2, thrusting during D3 was at least partly post-peak, late metamorphic.
13
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Graphite Phyllite (Host rock)
Rock Type:
Metamorphic rock (Sedim protolith-composition-texture)
Proportion:
minor
Grain size:
NA
Color:
NA
References:
1,7,13,14,15,17,18,19
Ore Minerals:
Proportion:
Graphite
Mineral texture:
minor
Type:
Regional
Comments:
Facies:
Grade:
Relation to
mineralization:
NA
Min P- Max P
(kbar)
Min T- Max T (°C)
amphibolite
medium
metamorphic
metamorphic
facies
grade
Metamorphic peak during D2, thrusting during D3 was at least partly post-peak, late metamorphic.
Quartz vein (Host rock)
Rock Type:
Hypabyssal rock
Proportion:
minor
Grain size:
NA
Color:
NA
References:
13,14,15
Comments:
Quartz-carbonate, chalcopyrite-pyrrhotite-quartz ± albite and carbonate,
arsenopyrite-carbonate, arsenopyrite-pyrrhotite, gersdorffite-carbonate, and
chalcopyrite-pyrite-quartz-carbonate veins which are, on average 10-20 cm wide
14
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Quartzite (Wall rock)
Rock Type:
Metamorphic rock (Sedim protolith-composition-texture)
Proportion:
minor
Grain size:
NA
Color:
NA
References:
3,7,8,13,15,17,19
Type:
Regional
Comments:
Facies:
Grade:
Relation to
mineralization:
NA
Min P- Max P
(kbar)
Min T- Max T (°C)
amphibolite
medium
metamorphic
metamorphic
facies
grade
Albite-quartz-sericite-chlorite-biotite ± graphite, pyrrhotite.
Figures
Gold and chalcopyrite as inclusions in gersdorffite
15
Page 16 OF 17
References
16
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Page 17 OF 17
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1
Eilu, P., Pankka, H., Keinänen, V., Kortelainen, V., Niiranen, T. & Pulkkinen, E. 2007. Characteristics of gold
mineralization in the greenstone belts of northern Finland. Geological Survey of Finland, Special Paper 44,
57-106.
http://tupa.gtk.fi/julkaisu/specialpaper/sp_044_pages_057_106.pdf
2
Lehtonen, M., Airo, M.-L., Eilu, P., Hanski, E., Kortelainen, V., Lanne, E., Manninen, T., Rastas, P., Räsänen, J.
& Virransalo, P. 1998. Kittilän vihreäkivialueen geologia: Lapin vulkaniittiprojektin raportti. Summary: The
stratigraphy, petrology and geochemistry of the Kittilä greenstone area, northern Finland: a report of the
Lapland Volcanite Project. Geological Survey of Finland, Report of Investigation 140. 144 p.
http://tupa.gtk.fi/julkaisu/tutkimusraportti/tr_140.pdf
3
Korkalo, T. 2006. Gold and copper deposits in Central Lapland, northern Finland, with special reference to their
exploration and exploitation. Acta Univ. Oulensis, A Scientiae Rerum Naturalium 461. 122 p.
http://tupa.gtk.fi/valokuva/mineraalivara/http://herkules.oulu.fi/isbn951428108X/isbn951428108X.pdf
4
Puustinen, K. 2003. Suomen kaivosteollisuus ja mineraalisten raaka-aineiden tuotanto vuosina 1530-2001,
historiallinen katsaus erityisesti tuotantolukujen valossa. Geological Survey of Finland, Report M 10.1/2003/3.
578 p. (in Finnish)
http://weppi.gtk.fi/aineistot/kaivosteollisuus/sisallys.htm
5
Outokumpu Oy malminetsintä 1986. XXXVII vuosikertomus 1986. Outokumpu Oy, Espoo. 111 p. (in Finnish)
6
Hölttä, P. & Karhu, J. 2001. Oxygen and carbon isotope compositions of carbonates in the alteration zones of
orogenic gold deposits in central Finninsh Lapland. Geological Survey of Finland Special Paper 31, 25-29.
7
Hölttä, P., Väisänen, M., Väänänen, J. & Manninen, T. 2007. Paleoproterozoic metamorphism and deformation
in Central Lapland, Finland. Geological Survey of Finland, Special Paper 44, 7-56.
8
Patison, N.L. 2007. Structural controls on gold mineralisation in the Central Lapland Greenstone Belt.
Geological Survey of Finland, Special Paper 44, 107-124.
9
Väisänen, M. 2002. Structural features in the Central Lapland greenstone belt, northern Finland. Geological
Survey of Finland, Report K 21.42/2002/3. 20 p.
http://tupa.gtk.fi/raportti/arkisto/k21_42_2002_3.pdf
10
Räisänen, K. 2001. Kun Kätkätunturin maisemissa vedettiin vesiperä. Vuoriteollisuus 59, 56-57.
11
GTK Ore Deposit Data Base 1997.
12
Holma, M.J., Törmänen, T. and Gehör, S. 2006. Characteristics of the sulfide-facies iron formation near the
Sirkka kaivos gold occurrence, northern Finland. Geol. Soc. Finland, Bull. Spec Issue 1, p. 51.
13
Inkinen, O. 1985. Kittilän Sirkan kulta-kupariesiintymästä. Summary: Gold-copper occurrence at Sirkka, Kittilä.
Geologi 37 (1), 8-11.
14
Isokangas, P. 1967. Kaivospiirien Sirkka I-V hylkäämisilmoitus. Outokumpu Oy, Report M17/Ktä-58-67/1. 2 p.
(in Finnish)
http://tupa.gtk.fi/raportti/arkisto/m17_kta_58_67_1.pdf
15
Vesanto, J. 1978. Sirkan malmi ja sitä ympäröivä kallioperä. Unpublished MSc thesis, Department of Geology,
University of Oulu. 89 p. (in Finnish)
16
Björklund, A. 1998. Personal communication 07/08/1998.
17
Lehtinen, M. 1987. Kittilän tutkimusalue: Sirkka. In: H. Papunen (ed.) Lapin vulkaniittien tutkimusprojekti.
Loppuraportti. Department of Geology, University of Turku, Report. 85-96. (In Finnish)
18
Hänninen, E. 1977. Kittilän Sirkan malmityypeistä. Outokumpu O, Report 070/2741 10B/EH/77. (in Finnish)
http://tupa.gtk.fi/raportti/arkisto/070_2741_10_b_eh_77.pdf
19
Mikkola, A. & Sandström, G. 1964. Kittilän malmitutkimukset. Outokumpu Oy, Malminetsintä, Report. 20 p. (In
Finnish)
http://tupa.gtk.fi/raportti/arkisto/001_2741_am_64.pdf
17

Sirkka kaivos

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