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Norsk versjon | ||||
| THE ORE DATABASE | |||||
| Deposit Area 1663 - 002 | |||||
| (Last updated 16.apr.2020) | |||||
Name of Deposit Area : Jervfjellet |
| (Object Id : 1663,002,00,00) |
| Location |
| County : | Sør-Trøndelag (16) | Municipality : | Malvik (1663) |
| Map 1:50000: | Trondheim (1621-4) | Map 1:250000: | Trondheim |
| Marking point: | Longitude: | 10.6999370 | Latitude: | 63.3338220 |
| EU89-UTM Zone 32 | (Coordinates IS confirmed) |
| X-coord: | 585113 m. | Y-coord: | 7023912 m. |
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| Commodity |
| Main Type: | Ferrous metals(Fe, Mn, Ti) | Sub Type: | Iron | |
| Element(s): | Fe |
| Production |
| Activity: | Pitting | Reserves: | ||
| Prod. method: | Production: | |||
| Prod. status: | Volume of dump: |
| Importance |
| Public: | Little Importance (reg. 18.02.2015) |
| Economical: | Minor interest |
Mineralization |
| Era: | Paleozoic | Period: | Ordovician | |
| Dating: | Method: | |||
| Genesis: | Volcex | Form: | Lens | |
| Main texture: | Structureless | Min. distribution: | Massive (>50 % ore minerals) |
| Main grain size: | Fine grained (< 1 mm) | Main alteration: |
| Strike/Dip: | 50 / 50 | Direction: | ||
| Plunge: |
| Stratigraphic classification of host rock |
| Era: | Paleozoic | Period: | Ordovician |
| Province: | Caledonides | |
| Geotec.unit: | Trondheim Nappe Complex | |
| Tectonic complex: | ||
| Igneous complex: |
| Group: | Formation: | Støren greenstone |
Mineralogy |
| Relationship | Mineral | Amount | |
| Gangue mineral | Quartz | Major mineral (>10%) | |
| Gangue mineral | Feldspar | Accessory mineral (<1%) | |
| Ore mineral | Magnetite | Major mineral (>10%) | |
| Ore mineral | Pyrite | Accessory mineral (<1%) |
Lithology: |
| Relationship | Rock | Origin | |
| Wall rock | Greenschist | Extrusive Original rock :Basalt |
|
| Metamorphic facies :Greenschist |
Structures |
| Location: | Type: | Orientation(360 gr.): | Relation to min.: | |
| Wall rock | Foliation | Strike/Dip :15 / 40 | Post-mineralisation ;...Effect :None |
Information(s) in free text format |
| Free text |
| Forekomsten ligger på østsida av Jervfjellet. En vannfylt skjæring med sidevegger 7 m x 1,5 m og retning 45° ligger mellom koller i glissen granskog. Mineraliseringen er omtrent totalt 1 m mektig og består av lag med massiv magnetitt (opptil 30 cm mektig), chert/blåkvartsitt med disseminert magnetitt og tynne lag og linser med grønnskifer. De gjennomskjæres av cm-tynne kvarts-feltspatårer med svak pyritt disseminasjon. Nord for skjerpet er blottet grønnskifer. |
| Photo(s) from the Deposit area: |
|
Fieldsamples |
| Sample No. | Sample type | Miscellanrous | ||||
| ST0124.01 | Bedrock |
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| ST0124.02 | Bedrock |
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| NB! All analyse values are shown at the end of the printout.: |
Analyse Results |
| from |
| Deposit Area 1663 - 002 Jervfjellet |
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# |
| ST0124.01 | Bedrock | 24 | 286 | 7 | 28 | 31 | -.3 | 3.0 |
| ST0124.02 | Bedrock | 18 | 238 | -3 | 31 | 29 | -.3 | 3.0 |
| ------------------ |
| Sample No. | Pt# | Pd# | As* | Cd* | Ba* | Mo* | Sb* | Bi* | S% |
| ST0124.01 | 2.0 | -1.0 | -2 | 1.4 | 15 | -1.00 | -3 | -3 | .07 |
| ST0124.02 | 3.0 | -1.0 | -2 | .8 | 4 | 1.00 | -3 | -3 | .10 |
| ------------------ |
| Sample No. | V* | Cr* | Mn* | Fe% | Th* | U* | W* | Sr* | La* |
| ST0124.01 | 264 | 18 | 1094 | 34.64 | 3.00 | -8.00 | 2 | 10.0 | 4.00 |
| ST0124.02 | 268 | 19 | 1132 | 35.28 | 3.00 | -8.00 | 5 | 17.0 | 4.00 |
| ------------------ |
| Sample No. | B* | ||||||||
| ST0124.01 | -3 | ||||||||
| ST0124.02 | -3 |
| The fact sheet was created on 12.09.2026 |
| Questions or comments regarding the fact sheet can be emailed to: ressursdatabaser@ngu.no |
| Copyright © 2026 Geological Survey of Norway |