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Occurence 0 - 000 FEIL | |||||
(Object Id: ) (Last updated: 13.03.2024) |
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Location |
County: | Municipality: | Mangler () |
Map 1:50000: | Svatsum (1717-1) | Map 1:250000: | Lillehammer |
Coordinate system: | UTM-Zone 33 - EUREF89/WGS84 |
East: | 532300 m. | North: | 6808350 m. |
Longitude: | 9.6049160 | Latitude: | 61.4062440 |
Show on map |
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Resource |
Resource Type: | Ferroalloys (Cr,Ni,Co,V,Mo,W) | Resource Subtype: | Nickel | |
Element(s): | Ni Cu Co |
Importance |
Raw material meaning: | Little Importance (reg. 18.02.2015) |
Resources and production |
Activity: | Mining | Reserves: | ||
Operating method: | Underground mining | Historical production: | 15 thousand tons |
Products |
Element/product | Crude ore grade or quality | Reg. date | |
Co | 0,08 % | 17.09.2007 | |
Cu | 0,6 % | 17.09.2007 | |
Ni | 1,9 % | 17.09.2007 |
Operations |
From - To | Activity | Comments | |
1665 - 1666 | Test mining | ||
1847 - 1855 | Regular production | Company/Institution :Espedals Værk | |
Produced 11510 tonnes of ore. | |||
1874 - 1876 | Regular production | Company/Institution :Espedalens Nikkelværk | |
Produced 3503 tonnes of ore. | |||
2007 - 2007 | Core drilling | Company/Institution :Blackstone Ventures Ltd | |
12 hull |
Mineralization |
Era: | Proterozoic | Period: | Mesoproterozoic | |
Genesis: | Orthomagmatic formation | Form: | Plate | |
Main texture: | Massive | Min. distribution: | Semi-massive (20-50 % ore minerals) |
Main grain size: | Medium grained (1-3 mm) | Main alteration: |
Strike/Dip: | 260 / 25 | Direction: | ||
Plunge: |
Stratigraphic classification of host rock |
Era: | Proterozoic | Period: | Mesoproterozoic |
Province: | Caledonian Basement Province | |
Geotec.unit: | Jotun Nappe Complex | |
Tectonic complex: | Espedalen Complex | |
Igneous complex: |
Group: | Formation: |
Mineralogy |
Relationship | Mineral | Amount | |
Gangue mineral | Pyroxene | Major mineral (>10%) | |
Gangue mineral | Amphibole | Subordinate mineral (1-10%) | |
Gangue mineral | Feldspar | Subordinate mineral (1-10%) | |
Ore mineral | Pyrrhotite | Major mineral (>10%) | |
Ore mineral | Pentlandite | Subordinate mineral (1-10%) | |
Ore mineral | Chalcopyrite | Subordinate mineral (1-10%) | |
Ore mineral | Pyrite | Subordinate mineral (1-10%) |
Lithology: |
Relationship | Rock | Origin | |
Host rock | Harzburgite | Intrusive Original rock :Peridotite |
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Metamorphic facies :Amphibolite | |||
Wall rock | Anorthosite | Intrusive | |
Metamorphic facies :Amphibolite |
Information(s) in free text format |
Free text |
The Espedalen Ni-Cu district is situated in an outlier of the Jotun Nappe Complex and consists of Proterozoic crustal rocks; mainly a high-grade anorthosite-gabbro-troctolite suite. Magmatic Ni-Cu sulphides have been mined in several periods in the region. Copper smelting is documented at Svatsum in 1665–1666 with description of ongoing mining of unknown duration. The first analysis and description of a new Ni-mineral, later named pentlandite, was reported from Espedalen by Scheerer (1845). The findings resulted in two mining periods of nickeliferous pyrrhotite (1846 to 1857 and 1874 to 1878) from Storgruva, Veslegruva and a number of smaller workings, making Espedalen one of the major mining districts at that time (up to 500 workers). An estimated total of about 50.000 tons of ore with 1.0 % Ni, 0.4 % Cu was produced. Modern exploration started in the late 1960s. Sulfidmalm and Norsk Hydro did extensive exploration until 1980. The latest period of exploration by Blackstone Ventures Inc. started in 2003 and has so far resulted in the discovery of two new deposits, Stormyra and Dalen. The inferred resources in the Stormyra deposit is 1.013 mill.t. with 1.09 % Ni, 0.48 % Cu and 0.04 % Co and at Dalen 4.625 mill.t. with 0.29 % Ni, 0.12 % Cu and 0.02 % Co. Drake refined the Mineral Resources at Stormyra (1.16Mt @ 1% Ni, 0.42% Cu & 0.04% Co) and Dalen (7.8Mt @ 0.28% Ni, 0.12% Cu & 0.02% Co) prospects in accordance with JORC (2012). |
Historic |
An account book for the years 1665-1666 from the Copper smelter at Masovn in Svatsum describes ongoing mining allready then. Veslegruva (The small mine) and Storgruva (The big Mine) were old and well known long before the nickel mining by the company Espedals Værk started. Total ore production from the Storgruva/Evans mine was about 15 000 tons, of which 12 000 were produced during 1847-1856 and 3 000 in the last period of production, 1874-1878. |
Bibliography: |
From NGU's Reference Archive: |
Braastad, J.; Gruholt, A.; Kiil, E. , 1936 |
Rapport over befaring av Espedalen nikkel-magnetkisfelter. |
;Norges geologiske undersøkelse;RAPPORT;Bergarkivet; No.BA 836;15 pages |
Abstract: | |
Lok. Nr. 10073, 10078. Rapporten refererer observasjoner gjort av forfatterne under en befaring av Espedalfeltet 22 - 28. 8. 1936. Vedlagt følger utdrag fra tidligere beretninger inklusivt produksjonsstatistikk. |
Vogt, J.H.L. , 1917 |
Espedalen Nikkel-magnetkisfelt. |
;Norges geologiske undersøkelse;FAGRAPPORT;Bergarkivet; No.BA 1419;27 pages |
Abstract: | |
Lok. Nr. 10073 - 10078. Rapporten har følgende inndeling: - Beliggenhet. - Om verkets drift i eldre dager. - Om vannkraft osv. - Malmforekomstens geologiske karakter. - Malmens nikkelprosent. - Veslegruben. - Evans grube. - Stangs grube. - Andreasberg. - Oversikt. |
References not to be found in NGU's Reference Archive.: |
Corfu, F., & Heim, M. 2014. Geology and U–Pb geochronology of the Espedalen Complex, southern Norway, and its position in the Caledonian nappe systems. Geological Society, London, Special Publications, 390(1), 223-239. https://doi.org/10.1144/jgs2019-010 |
Mansur, E.T., Slagstad, T., Dare, S.A.S. & Sandstad, J.S. 2023. Geology and sulphide geochemistry of the Ni-Cu-Co mineralisation of the Espedalen Complex, Norway: Constraints for the distribution of magmatic sulphides within a variably deformed anorthosite suite. Ore Geology Reviews 161. |
Forseth, Iver, 2004: Nikkelverket i Espedalen. Dølaringen boklag. 140s. |
Fieldsamples |
Sample No. | Sample type | Miscellanrous | ||||
JS-ES2219 | Dump |
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JS-ES2220 | Bedrock |
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JS-ES2221 | Dump |
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JS-ES2222 | Dump |
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NB! All analyse values are shown at the end of the printout.: |
Name of Locality: Storgruva sørøst |
(Object Id: 38770 13,01,00) |
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Location |
County: | Municipality: | Mangler () |
Map 1:50000: | Svatsum (1717-1) | Map 1:250000: | Lillehammer |
County: | UTM-Zone 33 - EUREF89/WGS84 |
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Resource |
Resource Type: | Ferroalloys (Cr,Ni,Co,V,Mo,W) | Resource Subtype: | Nickel | |
Element(s): | Ni Cu |
Resources and production |
Activity: | Pitting | Reserves: | ||
Operating method: | Historical production: |
Information(s) in free text format |
Free text |
En mindre vannfylt synk ligger ca. 300 m østsørøst for Storgruva. Den har sidevegger som er 5x3 m lange, og en tipp med volum omkring 30 m3. Finkornet gabbronoritt med disseminasjon av magnetkis og kobberkis finnes i tippen, mens området omkring domineres av blokker med anortositt. |
The fact sheet was created on 28.03.2024 |
Copyright © 2024 Geological Survey of Norway |