Norsk versjon | |||||
THE ORE DATABASE | |||||
Deposit Area 1924 - 016 | |||||
(Last updated 07.mar.2017) |
Name of Deposit Area : Takelva |
(Object Id : 1924,016,00,00) |
Location |
County : | Troms (19) | Municipality : | Målselv (1924) |
Map 1:50000: | Målselv (1433-2) | Map 1:250000: | Tromsø |
Marking point: | Longitude: | 18.6237580 | Latitude: | 69.1426020 |
EU89-UTM Zone 34 | (Coordinates IS confirmed) |
X-coord: | 405600 m. | Y-coord: | 7672092 m. |
|
Commodity |
Main Type: | Ferrous metals(Fe, Mn, Ti) | Sub Type: | Iron | |
Element(s): | Fe |
Production |
Activity: | Exploration | Reserves: | ||
Prod. method: | Production: | |||
Prod. status: | Volume of dump: |
Importance |
Public: | Little Importance (reg. 02.06.2015) |
Economical: | Minor interest , (Confirmed 02.jun.2015 by Terje Bjerkgård) |
Operations |
From - To | Activity | Comments | |
2011 - 2011 | Geophysics | Company/Institution :NGU | |
Aerial survey (mag., EM, radiometry). | |||
2011 - 2013 | Geology | Company/Institution :NGU |
Mineralization |
Era: | Proterozoic | Period: | Neoproterozoic | |
Dating: | Method: | |||
Genesis: | Chemical sediment | Form: | Layer | |
Main texture: | Banded | Min. distribution: | Semi-massive (20-50 % ore minerals) |
Main grain size: | Medium grained (1-3 mm) | Main alteration: | No country rock alteration |
Strike/Dip: | Direction: | |||
Plunge: |
Stratigraphic classification of host rock |
Era: | Proterozoic | Period: | Mesoproterozoic |
Province: | Troms-Finnmark Basement Province | |
Geotec.unit: | ||
Tectonic complex: | Mauken Tectonic Window | |
Igneous complex: |
Group: | Målselva Group | Formation: | Myrefjellet Formation |
Mineralogy |
Relationship | Mineral | Amount | |
Gangue mineral | Quartz | Major mineral (>10%) | |
Gangue mineral | Carbonate | Major mineral (>10%) | |
Gangue mineral | Biotite | Accessory mineral (<1%) | |
Gangue mineral | Chlorite | Accessory mineral (<1%) | |
Ore mineral | Magnetite | Major mineral (>10%) | |
Ore mineral | Pyrite | Accessory mineral (<1%) |
Lithology: |
Relationship | Rock | Origin | |
Wall rock | Greenstone | Extrusive Original rock :Basalt |
|
Metamorphic facies :Greenschist |
Information(s) in free text format |
Free text |
The iron formation forms an extensive layer within the major greenstone unit, stretching from the main road (E6) in the northwest and southeastwards up the steep slopes towards Helgemauken. It gives a strong magnetic anomaly. The total length of the zone is more than 3.5 km, while the thickness is 6-7 m. The northernmost outcrop of the zone is in the river Takelva, where it is a strongly foliated, laminated on some cm-scale, quartz- and carbonate-rich, iron formation, some 6-7 m thick. The iron mineral is magnetite. The outcrop shows isoclinal folding with development of transposed foliation. In the south, it shows more of an irregular banding, partly with lenses of fine-grained magnetite and quartz. The northern outcrop contains quartz, carbonate and magnetite as major phases, while pyrite, chlorite and biotite are accessories. The southern outcrop is dominated by quartz and magnetite, while carbonate is absent. Chlorite and grunerite are subordinate phases. Geochemistry (two samples) shows contents of 28.0 and 21.6 % Fe2O3, while the content of TiO2 is very low (0.05 and 0.01 %) for the northern and southern outcrops, respectively. The same samples contain 0.87 and 0.17% P2O5. |
Bibliography: |
From NGU's Reference Archive: |
Bjerkgård, Terje; Henderson, Iain; Sandstad, Jan Sverre; Schönenberger, Johannes; Slagstad, Trond , 2015 |
Geology of the Mauken tectonic window, Målselv, Troms |
;Norges geologiske undersøkelse;RAPPORT;NGU-rapport; No.2015.013;60+kart pages |
Abstract: | |
This report presents the results from bedrock mapping in the Mauken tectonic window, carried out in several periods in 2011-2013. During the NGU MINN program, the Mauken area has been subject to a high-resolution airborne geophysical survey (magnetometry, radiometry, EM), followed by bedrock mapping and structural geology investigations. The work in the Mauken area is part of a larger project in southern Troms, with the goal to work out a structural-tectonic-metallogenic model and interpretaion for the basement areas in the whole region. |
Fieldsamples |
Sample No. | Sample type | Miscellanrous | ||||
TB-MA67 | Bedrock |
|
NB! All analyse values are shown at the end of the printout.: |
Name of Locality : Outcrop |
(Object Id : 1924,016,01,00) |
Location |
County : | Troms (19) | Municipality : | Målselv (1924) |
Map 1:50000: | Takvatnet (1533-3) | Map 1:250000: | Tromsø |
Marking point: | Longitude: | 18.6640890 | Latitude: | 69.1259460 |
EU89-UTM Zone 34 | (Coordinates IS confirmed) |
X-coord: | 407130 m. | Y-coord: | 7670174 m. |
|
Commodity |
Main Type: | Ferrous metals(Fe, Mn, Ti) | Sub Type: | Iron | |
Element(s): | Fe |
Production |
Activity: | Exploration | Reserves: | ||
Prod. method: | Production: | |||
Prod. status: | Volume of dump: |
Fieldsamples |
Sample No. | Sample type | Miscellanrous | |||
TB-MA 69 | Bedrock |
|
Analyse Results |
from |
Deposit Area 1924 - 016 Takelva |
Element analyses |
( *=parts pr. million, #=parts pr.billion, Negative values means below detection limit value.) |
Sample No. | Sample Type | Cu* | Zn* | Pb* | Co* | Ni* | As* | Ba* |
TB-MA67 | Bedrock | 4 | 16 | 6 | 30 | 30 | 16 | 111 |
------------------ |
Sample No. | Mo* | Ga* | V* | Mn* | Fe% | U* | W* | Rb* | Sr* |
TB-MA67 | 1.00 | -1.00 | 16 | 2788 | 19.58 | 1.00 | -1 | 3.0 | 59.0 |
------------------ |
Sample No. | Y* | Zr* | Nb* | Cs* | La* | Ce* | Pr* | Nd* | Sm* |
TB-MA67 | 16.0 | 7 | -1.00 | -1.00 | 15.00 | 29.00 | 3.00 | 15.00 | 3.00 |
------------------ |
Sample No. | Eu* | Gd* | Tb* | Dy* | Ho* | Er* | Tm* | Yb* | Lu* |
TB-MA67 | -1.00 | 4.00 | -1.00 | 3.00 | -1.00 | 1.00 | -1.00 | 1.00 | -1.00 |
------------------ |
Sample No. | Na* | Mg* | Al* | Si* | P* | K * | Ca* | Ti* | Hf* |
TB-MA67 | 37 | 844 | 1270 | ###### | 3797 | 415 | 51458 | 30 | -1.00 |
The fact sheet was created on 10.05.2024 |
Questions or comments regarding the fact sheet can be emailed to: ressursdatabaser@ngu.no |
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