(Last updated: 25.02.2005)
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Norsk versjon | ||||
| THE ORE DATABASE | |||||
| Occurence 1112 - 008 Tunshomstølen | |||||
| (Object Id: 5005) (Last updated: 25.02.2005) |
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| Location |
| County: | Rogaland | Municipality: | Lund (1112) |
| Map 1:50000: | Ørsdalsvatnet (1312-3) | Map 1:250000: | Mandal |
| Coordinate system: | EU89-UTM Zone 32 |
| East: | 355169 m. | North: | 6498120 m. |
| Longitude: | 6.5076610 | Latitude: | 58.5992590 |
| Show on map |
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| Resource |
| Resource Type: | Ferroalloys (Cr,Ni,Co,V,Mo,W) | Resource Subtype: | Nickel | |
| Element(s): | Ni Cu Co |
| Importance |
| Raw material meaning: | Little Importance (reg. 18.02.2015) |
| Resources and production |
| Activity: | Pitting | Reserves: | ||
| Operating method: | Historical production: |
Operations |
| From - To | Activity | Comments | |
| 1992 - 1992 | Inspection | Company/Institution :NGU | |
| 2000 - 2000 | Sampling | Company/Institution :NGU |
Mineralization |
| Era: | Proterozoic | Period: | Mesoproterozoic | |
| Genesis: | Orthomagmatic formation | Form: | Lens | |
| Main texture: | Structureless | Min. distribution: | Semi-massive (20-50 % ore minerals) |
| Main grain size: | Medium grained (1-3 mm) | Main alteration: | Biotitisation |
| Strike/Dip: | 338 / 30 | Direction: | ||
| Plunge: |
| Stratigraphic classification of host rock |
| Era: | Proterozoic | Period: | Mesoproterozoic |
| Province: | South Norwegian Basement Province | |
| Geotec.unit: | Agder Complex | |
| Tectonic complex: | ||
| Igneous complex: |
| Group: | Formation: |
Mineralogy |
| Relationship | Mineral | Amount | |
| Gangue mineral | Amphibole | Major mineral (>10%) | |
| Gangue mineral | Feldspar | Subordinate mineral (1-10%) | |
| Gangue mineral | Quartz | Subordinate mineral (1-10%) | |
| Gangue mineral | Biotite | Subordinate mineral (1-10%) | |
| Ore mineral | Pyrrhotite | Major mineral (>10%) | |
| Ore mineral | Chalcopyrite | Subordinate mineral (1-10%) |
Lithology: |
| Relationship | Rock | Origin | |
| Host rock | Ultramafic amphibolite | Intrusive Original rock :Hornblendite |
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| Metamorphic facies :Granulite | |||
| Wall rock | Granitic gneiss | Intrusive Original rock :Granite |
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| Metamorphic facies :Granulite |
Structures |
| Location: | Type: | Orientation(360 gr.): | Relation to min.: | |
| Host rock | Foliation | Strike/Dip :338 / 30 | Post-mineralisation ;...Effect :Modifies |
Information(s) in free text format |
| Free text |
| The pit is situated on the lower part of a steep slope on the west side of Rusdalen. Three short holes have been drilled and a 2.5H0.5m pit has been blasted out. The host rock is assumed to be an intrusive of alternating diffuse lighter quartzo-felspathic bands and darker more amphibolitic bands, with a foliation at 338/030. This host is minimum 8m thick and builds a ledge over the pit; it is overlain by a quartzo-felspathic gneiss. The rusty zone around the pit is minimum 5m long and extends spotwise over more than 100m along the strike towards NW. Both rocks are cut by pegmatites. The sulphide mineralization is irregular and consists of semi-massive, networked veins and disseminated pyrrhotite and minor chalcopyrite in the amphibolitic rock. The latter is richer in biotite towards the contact with the sulphides zone. |
| Photo(s) from the Deposit area: |
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Fieldsamples |
| Sample No. | Sample type | Miscellanrous | ||||
| RO0132.01 | Bedrock |
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| RO0132.02 | Bedrock |
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| NB! All analyse values are shown at the end of the printout.: |
Analyse Results |
| from |
| Deposit Area 1112 - 008 Tunshomstølen |
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# |
| RO0132.01 | Bedrock | 2674 | 61 | 18 | 316 | 1358 | .8 | 61.0 |
| RO0132.02 | Bedrock | 2891 | 61 | 18 | 230 | 964 | 1.2 | 38.0 |
| ------------------ |
| Sample No. | Pt# | Pd# | As* | Cd* | Ba* | Mo* | Sb* | Bi* | S% |
| RO0132.01 | 1.0 | 13.0 | 6 | 1.1 | 58 | 3.00 | 2 | 4 | 6.70 |
| RO0132.02 | 4.0 | 14.0 | 5 | .8 | 117 | 1.00 | 2 | 2 | 5.02 |
| ------------------ |
| Sample No. | V* | Cr* | Mn* | Fe% | Th* | U* | W* | Sr* | La* |
| RO0132.01 | 120 | 429 | 168 | 13.19 | 6.00 | 4.00 | 1 | 19.0 | 56.00 |
| RO0132.02 | 196 | 690 | 158 | 11.07 | 8.00 | 4.00 | 3 | 44.0 | 84.00 |
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| Sample No. | B* | ||||||||
| RO0132.01 | 2 | ||||||||
| RO0132.02 | 2 |
| The fact sheet was created on 06.05.2024 |
| Questions or comments regarding the fact sheet can be emailed to: ressursdatabaser@ngu.no |
| Copyright © 2024 Geological Survey of Norway |