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THE ORE DATABASE | |||||
Ulovlig p_spraak parameter for Forekomstområde 937 - 010 | |||||
(Sist oppdatert 13.mar.2024) |
Navn på deposit area : Flåt/Evje |
(Objekt Id : 0937,010,00,00) |
Lokalisering |
Fylke : | Aust-Agder (09) | Kommune : | Evje og Hornnes (0937) |
Kart 1:50000: | Evje (1512-3) | Kart 1:250000: | Mandal |
Markeringspunkt: | Lengdegrad: | 7.8707160 | Breddegrad: | 58.5984440 |
EU89-UTM Zone 32 | (Coordinates IS confirmed) |
X-koord: | 434368 m. | Y-koord: | 6495892 m. |
|
Materialtype |
Hovedtype: | Jernlegeringsmetaller (Cr,Ni,Co,V,Mo,W) | Subtype: | Nikkel | |
Element(s): | Ni Cu Co |
Production |
Activity: | Gruvedrift | Reserves: | ||
Prod. method: | Dag- og underjordsdrift | Production: | 2700 thousand tons | |
Prod. status: | Nedlagt | Volume of dump: | 1000000 m3 |
Betydning |
Offentlig: | Not Assessed (reg. 20.03.2017) |
Economical: | Viktig , (Confirmed 19.mar.2007 by Morten Often) |
Historical: | Yes , (Confirmed 16.feb.2005 by Havard Gautneb) |
Products |
Element/product | Crude ore grade or quality | |
CO | 0,015 | |
CU | .48 % | |
NI | .72 % | |
P | 4 % |
Operations |
From - To | Activity | Comments | |
Geophysics | |||
1872 - 1946 | Regular production | ||
1933 - 1944 | Core drilling | ||
1990 - 1991 | Geology |
Mineralization |
Era: | Proterozoic | Period: | Mesoproterozoic | |
Dating: | Method: | |||
Genesis: | Ortomagmatisk | Form: | Linse | |
Main texture: | Strukturløs | Min. distribution: | Semi-massiv |
Main grain size: | Middelskornet (1-3 mm) | Main alteration: | Klorittisering |
Strike/Dip: | 10 / 45 | Direction: | ||
Plunge: |
Stratigraphic classification of host rock |
Era: | Proterozoic | Period: | Mesoproterozoic |
Province: | South Norwegian Basement Province | |
Geotec.unit: | Setesdal-Hallingdal Complex | |
Tectonic complex: | ||
Igneous complex: | Evje Amphibolite Complex |
Group: | Formation: |
Mineralogy |
Relationship | Mineral | Amount | |
Gangue mineral | Biotite | Major mineral (>10%) | |
Gangue mineral | Amphibole | Major mineral (>10%) | |
Gangue mineral | Chlorite | Subordinate mineral (1-10%) | |
Gangue mineral | Apatite | Subordinate mineral (1-10%) | |
Gangue mineral | Pyroxene | Accessory mineral (<1%) | |
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%) | |
Ore mineral | Millerite | Accessory mineral (<1%) | |
Ore mineral | Violarite | Accessory mineral (<1%) |
Lithology: |
Relationship | Rock | Origin | |
Unknown | Mykleås amfibolitt | Intrusive Original rock :Diorite |
|
1000 mill. years;..Method:Rb/Sr | |||
Metamorphic facies :Amphibolite | |||
Host rock | Flåt dioritt | Intrusive Original rock :Quartz diorite |
|
950 mill. years | |||
Metamorphic facies :Amphibolite |
Structures |
Location: | Type: | Orientation(360 gr.): | Relation to min.: | |
Unknown | Shear plane | Strike/Dip :10 / 80 | Syn-mineralisation ;...Effect :None | |
Unknown | Fault plane | Strike/Dip :10 / 35 | Post-mineralisation ;...Effect :Controls |
Opplysning(er) i fritekstformat |
Fri tekst |
Flåt nikkelgruve ligger i nordskråningen av Mykleåsen i Evje. Forekomsten ble funnet i 1870 og produksjon startet i 1872. Med korte opphold var gruva i drift fra 1872 til 1946. Det er den største nikkelgruve som har vært drevet i Norge, og var også lenge den største i Europa. Totalt er det produsert 2,6 millioner tonn med 0,75% Ni og 0,47%Cu. Malmen fallerfra utgående mot sør og er ca 900m lang. Malmmineralene opptrer hovedsaklig i massiv kvartsdioritt. Øverste del av gruva er tilrettelagt for besøk av turister. |
Bibliography: |
From NGU's Reference Archive: |
Bjørlykke, Harald , 1947 |
Flåt nickel mine. |
;Norges geologiske undersøkelse;TIDSSKRIFTARTIKKEL;NGU; No.168b;1-39 + fo pages |
Barth, Tom F. W. , 1947 |
The Nickeliferous Iveland-Evje amphibolite and its relation. |
;Norges geologiske undersøkelse;TIDSSKRIFTARTIKKEL;NGU; No.168a;1-71 + fo pages |
Abstract: | |
The pre-Cambrian nickelferous meta-norite at Iveland-Evje represents an amphibolite body entirely surrounded by gneissous granite and augen genisses. More than 90% of the amphibolite body is made up with schistose or gneissic rocks in most of which alternating dark and light layers have developed through the combined effect of recrystallization and internal differential movements. So thorough has been the re-working of the material that the determination of the nature of the original rock is utterly impossible. The conclusion that at least part of this rock was norite is based entirely on circumstancial evidences, such as the association with nickel ore, and the petrographical analogy of certain facies of the Evje rock with nickelferous norite elsewhere. The individual dark and light bands, although sharply separated, are composed of exactly the same kinds of mineral: Plagioclase has the same chemical composition, and hornblende and biotite exhibit the same optical constants in both bands; only the relative proportions of the minerals differ radically. In some places banding is not well developed, but light and dark constituents have separated in concretionary patches. |
Fieldsamples |
Sample No. | Sample type | Miscellanrous | ||||
FLÅT 06-1 | Hand specimen |
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FLÅT 06-2 | Hand specimen |
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FLÅT 06-3 | Hand specimen |
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FLÅT 06-4 | Hand specimen |
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NB! All analyse values are shown at the end of the printout.: |
Analyse Results |
from |
Forekomstområde 937 - 010 Flåt/Evje |
Element analyses |
( *=parts pr. million, #=parts pr.billion, Negative values means below detection limit value.) |
Sample No. | Sample Type | Cu* | Zn* | Pb* | Co* | Ni* | Ag* | Au# |
FLÅT 06-1 | Hand specimen | 49706 | 293 | 54 | 214 | 5398 | 20.0 | 121.0 |
FLÅT 06-2 | Hand specimen | 9962 | 84 | 33 | 253 | 17936 | 6.3 | 170.0 |
FLÅT 06-3 | Hand specimen | 3080 | 128 | 28 | 140 | 4265 | 2.0 | 19.0 |
FLÅT 06-4 | Hand specimen | 3721 | 101 | 66 | 102 | 5209 | 2.0 | 30.0 |
------------------ |
Sample No. | Pt# | Pd# | As* | Cd* | Mo* | Bi* | S% | V* | Cr* |
FLÅT 06-1 | 14.0 | 9.0 | 5 | 2.2 | 1.00 | 3 | 7.70 | 101 | 241 |
FLÅT 06-2 | 66.0 | 15.0 | 2.00 | 13.70 | 100 | 314 | |||
FLÅT 06-3 | 16.0 | 3.0 | 3.50 | 66 | |||||
FLÅT 06-4 | 8.0 | -2.0 | -.5 | 3.60 | 91 | 92 |
------------------ |
Sample No. | Mn* | Fe% | Th* | U* | Sr* | La* | |||
FLÅT 06-1 | 208 | 16.07 | 4.00 | 1.00 | 62.0 | ||||
FLÅT 06-2 | 226 | 24.94 | |||||||
FLÅT 06-3 | 7.19 | 128.0 | |||||||
FLÅT 06-4 | 10.87 | 94.0 | 54.00 |
Faktaarket ble generert 16.05.2024 |
Spørsmål eller kommentarer vedrørende faktaarket kan mailes til: ressursdatabaser@ngu.no |
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