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THE ORE DATABASE | |||||
Deposit Area 2030 - 008 | |||||
(Last updated 09.okt.2017) |
Name of Deposit Area : Grundtjern |
(Object Id : 2030,008,00,00) |
Drill Cores from the Deposit Area: See Borehole Area Grundtjern |
Location |
County : | Finnmark (20) | Municipality : | Sør-Varanger (2030) |
Map 1:50000: | Kirkenes (2434-2) | Map 1:250000: | Kirkenes |
Marking point: | Longitude: | 30.0160580 | Latitude: | 69.6279030 |
EU89-UTM Zone 36 | (Coordinates IS confirmed) |
X-coord: | 384110 m. | Y-coord: | 7727208 m. |
|
Commodity |
Main Type: | Ferrous metals(Fe, Mn, Ti) | Sub Type: | Iron | |
Element(s): | Fe |
Production |
Activity: | Mining | Reserves: | 2900 thousand tons | |
Prod. method: | Open pit mining | Production: | 5300 thousand tons | |
Prod. status: | Disused, closed | Volume of dump: | ||
Resource estimat. standard: | JORC |
Importance |
Public: | Not Assessed (reg. 20.03.2017) |
Economical: | Could be significant , (Confirmed 26.jun.2009 by Morten Often) |
Products |
Element/product | Crude ore grade or quality | |
FE_MAG | 31 % |
Operations |
From - To | Activity | Comments | |
1972 - 1972 | Regular production | Company/Institution :A/S Sydvaranger | |
1996 - 1996 | Sampling | Company/Institution :A/S Sydvaranger |
Mineralization |
Era: | Archean | Period: | ||
Dating: | Method: | |||
Genesis: | Sedex | Form: | Layer | |
Main texture: | Banded | Min. distribution: | Semi-massive (20-50 % ore minerals) |
Main grain size: | Fine grained (< 1 mm) | Main alteration: |
Strike/Dip: | 330 / 65 | Direction: | ||
Plunge: |
Stratigraphic classification of host rock |
Era: | Archean | Period: |
Province: | Troms-Finnmark Basement Province | |
Geotec.unit: | ||
Tectonic complex: | ||
Igneous complex: |
Group: | Bjørnevann Group | Formation: | Fisketind Formation |
Mineralogy |
Relationship | Mineral | Amount | |
Gangue mineral | Quartz | Major mineral (>10%) | |
Gangue mineral | Amphibole | Major mineral (>10%) | |
Gangue mineral | Epidote | Subordinate mineral (1-10%) | |
Ore mineral | Magnetite | Major mineral (>10%) |
Lithology: |
Relationship | Rock | Origin | |
Wall rock | Hornblende gneiss | Extrusive Original rock :Basalt |
|
Metamorphic facies :Amphibolite |
Structures |
Location: | Type: | Orientation(360 gr.): | Relation to min.: | |
Host rock | Foliation | Strike/Dip :330 / 65 | Post-mineralisation ;...Effect :None | |
Host rock | Primary layering | Strike/Dip :330 / 65 | Syn-mineralisation ;...Effect :Controls |
Information(s) in free text format |
Free text |
Grundtjern-dagbruddet, som ble drevet i perioden 1972 - 77, er ca. 800 m langt. Det er tatt ut 5.3 mill. tonn malm og 5.5 mill. tonn gråberg. Grundtjernmalmen ligger mellom Søstervannmalmen og Tverrdalen Nord, og dens stratigrafiske posisjon er noe usikker. Malmen består av en enkel malmhorisont, hengmalm med 31 % Fe magn., med steile sørlige foldeakser, dreiende vest mot dypet. En synformslukning mot øst underbygger teorien om at Grundtjernsmalmen danner en antiform av hengmalmsonen i Søstervannsmalmen. Malmen er noe oppsplittet av hornblendegneissoner, p.g.a. den kraftige N-S isoklinale foldefasen feltet er påvirket av. Heng og liggbergartene er hornblendegneis. I forbindelse med reevaluering for gjeoppstarting av Sydvaranger Gruve AS (http://www.sydvarangergruve.no/) i 2009 er forekomsten JORC-klassifisert, av Coffey Mining. Inferred Resources er beregnet til 3 millioner tonn med 34% total jern. Se http://www.northerniron.com.au/ |
Bibliography: |
References not to be found in NGU's Reference Archive.: |
Iversen, E. 1991: Geologisk beskrivelse av kartblad 2434 II Kirkenes og deler av kartblad 2434 III Høybuktmoen. Rapp. nr. 2072, Prospektering A/S. |
A/S Sydvaranger 1985: Gruveplan 1985. |
Fieldsamples |
Sample No. | Sample type | Miscellanrous | ||||
FI0009.01 | Bedrock |
|
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FI0009.02 | Bedrock |
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NB! All analyse values are shown at the end of the printout.: |
Analyse Results |
from |
Deposit Area 2030 - 008 Grundtjern |
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# |
FI0009.01 | Bedrock | 10 | 2 | -3 | -1 | 2 | -.3 | 1.0 |
FI0009.02 | Bedrock | 5 | -1 | -3 | -1 | 7 | -.3 | 4.0 |
------------------ |
Sample No. | Pt# | Pd# | Rh# | As* | Cd* | Ba* | Mo* | Sb* | Bi* |
FI0009.01 | -1.0 | -1.0 | -1.0 | -2 | 1.9 | 2 | -1.00 | -2 | -2 |
FI0009.02 | -1.0 | 1.0 | -1.0 | -2 | -.2 | 18 | 5.00 | -2 | 6 |
------------------ |
Sample No. | V* | Cr* | Mn* | Fe% | Th* | U* | W* | Sr* | La* |
FI0009.01 | 2 | -1 | 430 | 22.16 | 5.00 | 7.00 | -2 | 3.0 | 1.00 |
FI0009.02 | 6 | 1 | 357 | 22.58 | 7.00 | -5.00 | -2 | 16.0 | 8.00 |
------------------ |
Sample No. | B* | ||||||||
FI0009.01 | -3 | ||||||||
FI0009.02 | -3 |
The fact sheet was created on 18.05.2024 |
Questions or comments regarding the fact sheet can be emailed to: ressursdatabaser@ngu.no |
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