(Last updated: 27.01.2023)
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Norsk versjon | ||||
| THE ORE DATABASE | |||||
| Occurence 5028 - 014 Bjørnholet | |||||
| (Object Id: 4449) (Last updated: 27.01.2023) |
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| Location |
| County: | Trøndelag | Municipality: | Melhus (5028) |
| Map 1:50000: | Trondheim (1621-4) | Map 1:250000: | Trondheim |
| Coordinate system: | EU89-UTM Zone 32 |
| East: | 566503 m. | North: | 7017753 m. |
| Longitude: | 10.3258430 | Latitude: | 63.2825130 |
| Show on map |
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| Resource |
| Resource Type: | Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) | Resource Subtype: | Sulphides | |
| Element(s): | Kis |
| Importance |
| Raw material meaning: | Not Assessed (reg. 18.02.2015) |
| Resources and production |
| Activity: | Pitting | Reserves: | ||
| Operating method: | Historical production: |
Mineralization |
| Era: | Paleozoic | Period: | Ordovician | |
| Genesis: | Volcex | Form: | Lens | |
| Main texture: | Banded | Min. distribution: | Semi-massive (20-50 % ore minerals) |
| Main grain size: | Fine grained (< 1 mm) | Main alteration: | Silicification |
| Strike/Dip: | 265 / 45 | Direction: | ||
| Plunge: |
| Stratigraphic classification of host rock |
| Era: | Paleozoic | Period: | Ordovician |
| Province: | Caledonides | |
| Geotec.unit: | Trondheim Nappe Complex | |
| Tectonic complex: | LVB ofiolittfragmenter | |
| Igneous complex: |
| Group: | Formation: | Bymarkgrønnsteinen |
Mineralogy |
| Relationship | Mineral | Amount | |
| Gangue mineral | Quartz | Major mineral (>10%) | |
| Gangue mineral | Chlorite | Subordinate mineral (1-10%) | |
| Gangue mineral | Feldspar | Subordinate mineral (1-10%) | |
| Ore mineral | Pyrite | Major mineral (>10%) |
Lithology: |
| Relationship | Rock | Origin | |
| Host rock | Greenstone | Extrusive Original rock :Basalt |
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| Metamorphic facies :Greenschist |
Structures |
| Location: | Type: | Orientation(360 gr.): | Relation to min.: | |
| Host rock | Schistosity | Strike/Dip :265 / 45 | Post-mineralisation ;...Effect :Modifies |
Information(s) in free text format |
| Free text |
| Skjerpet ligger i tett granskog, rett sør for en kraftlinje i sørøstskråningen av Svartåsen. Det består av et 2,5 m dypt og 2,5 m bredt innhugg i grønnstein. Skjerpet er vannfylt og opptil 1,8 m høyt over vannspeilet. Sulfidmineraliseringen består av linser med disseminert til semi-massiv svovelkis i kvartsrik matriks i grønnsteinen. |
Fieldsamples |
| Sample No. | Sample type | Miscellanrous | ||||
| JS-T2108 | Dump |
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| NB! All analyse values are shown at the end of the printout.: |
Analyse Results |
| from |
| Deposit Area 5028 - 014 Bjørnholet |
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# |
| JS-T2108 | Dump | 59 | 44 | 11 | 18 | 96 | .2 | 24.0 |
| ------------------ |
| Sample No. | Pt# | Pd# | As* | Cd* | Ba* | Mo* | Sn* | Sb* | Bi* |
| JS-T2108 | -5.0 | 3.0 | 47 | .0 | -10 | 19.60 | 1 | 0 | 0 |
| ------------------ |
| Sample No. | Se* | Ga* | Ge* | In* | S% | V* | Cr* | Mn* | Fe% |
| JS-T2108 | 22.00 | 7.26 | 0.23 | 0.02 | 26.50 | 138 | 52 | 567 | 27.30 |
| ------------------ |
| Sample No. | Th* | U* | W* | Rb* | Sr* | Y* | Zr* | Nb* | Ta* |
| JS-T2108 | 2.00 | 4.80 | 0 | 0.1 | 115.5 | 14.9 | 26 | 2.40 | 0.18 |
| ------------------ |
| Sample No. | Cs* | La* | Ce* | Li* | Be* | P* | Sc* | Te* | Hf* |
| JS-T2108 | -0.05 | 7.00 | 15.45 | 6 | 0 | 700 | 8.00 | 2.22 | 0.80 |
| ------------------ |
| Sample No. | Re* | Tl* | |||||||
| JS-T2108 | 60 | 0 |
| The fact sheet was created on 29.04.2024 |
| Questions or comments regarding the fact sheet can be emailed to: ressursdatabaser@ngu.no |
| Copyright © 2024 Geological Survey of Norway |