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Norsk versjon | ||||
| THE ORE DATABASE | |||||
| Deposit Area 1902 - 010 | |||||
| (Last updated 07.feb.2005) | |||||
Name of Deposit Area : Mjelde |
| (Object Id : 1902,010,00,00) |
| Location |
| County : | Troms (19) | Municipality : | Tromsø (1902) |
| Map 1:50000: | Tussøya (1434-2) | Map 1:250000: | Tromsø |
| Marking point: | Longitude: | 18.4863790 | Latitude: | 69.5577670 |
| EU89-UTM Zone 34 | (Coordinates IS confirmed) |
| X-coord: | 402045 m. | Y-coord: | 7718571 m. |
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| Commodity |
| Main Type: | Ferroalloys (Cr,Ni,Co,V,Mo,W) | Sub Type: | Molybdenium | |
| Element(s): | Mo |
| Production |
| Activity: | Pitting | Reserves: | ||
| Prod. method: | Production: | |||
| Prod. status: | Volume of dump: | 2 m3 |
| Importance |
| Public: | Little Importance (reg. 18.02.2015) |
| Economical: | Minor interest , (Confirmed 07.feb.2005 by Peter Ihlen) |
Mineralization |
| Era: | Paleozoic | Period: | ||
| Dating: | Method: | |||
| Genesis: | Pegmatite formation | Form: | Lens | |
| Main texture: | Fracture filling | Min. distribution: | Irregular (scattered) |
| Main grain size: | Coarse grained (> 3 mm) | Main alteration: |
| Strike/Dip: | 90 / 90 | Direction: | ||
| Plunge: |
| Stratigraphic classification of host rock |
| Era: | Proterozoic | Period: |
| Province: | ||
| Geotec.unit: | ||
| Tectonic complex: | ||
| Igneous complex: |
| Group: | Formation: |
Mineralogy |
| Relationship | Mineral | Amount | |
| Gangue mineral | Potassic feldspar | Major mineral (>10%) | |
| Gangue mineral | Quartz | Major mineral (>10%) | |
| Gangue mineral | Plagioclase | Subordinate mineral (1-10%) | |
| Gangue mineral | Muscovite | Subordinate mineral (1-10%) | |
| Ore mineral | Molybdenite | Major mineral (>10%) |
Lithology: |
| Relationship | Rock | Origin | |
| Host rock | granittpegmatitt | Intrusive Original rock :Granite |
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| Wall rock | kvarts-feltspatgneis | Sedimentary Original rock :Siltstone |
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| Metamorphic facies :Amphibolite |
Structures |
| Location: | Type: | Orientation(360 gr.): | Relation to min.: | |
| Wall rock | Joints/Fractures | Strike/Dip :90 / 90 | Pre-mineralisation ;...Effect :Controls |
Information(s) in free text format |
| Free text |
| Den mineraliserte granittpegmatitten (prøve 01 og 02) ligger 395 m.o.h. i fjellsida øst for Brokselva. Den er delvis blottet over en Ø-V (og steil?)-strøklengde på ca. 20 m. Mektigheten er 6-7 m. En god del grove flak av molybdenglans opptrer spredt i hele gangen, som hovedsaklig består av kalifeltspat og kvarts (ikke sonert, men endel partier med ren kvarts), med mindre mengder plagioklas og muskovitt. Det er sprengt litt (et par m3) i gangen. Det skjedde iflg. lokalfolk i ca. 1930. Det er også blottet flere pegmatittganger, samt at det er pegmatittblokker i nærheten, uten molybdenglans. |
Fieldsamples |
| Sample No. | Sample type | Miscellanrous | |||
| TR0203.01 | Bedrock |
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| TR0203.02 | Bedrock |
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| The fact sheet was created on 05.05.2024 |
| Questions or comments regarding the fact sheet can be emailed to: ressursdatabaser@ngu.no |
| Copyright © 2024 Geological Survey of Norway |