(Last updated: 16.05.2006)
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Norsk versjon | ||||
| THE ORE DATABASE | |||||
| Occurence 5022 - 023 Nyberget | |||||
| (Object Id: 4290) (Last updated: 16.05.2006) |
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| Location |
| County: | Trøndelag | Municipality: | Rennebu (5022) |
| Map 1:50000: | Innset (1520-2) | Map 1:250000: | Røros |
| Coordinate system: | EU89-UTM Zone 32 |
| East: | 555978 m. | North: | 6953238 m. |
| Longitude: | 10.0941660 | Latitude: | 62.7053720 |
| Show on map |
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| Resource |
| Resource Type: | Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) | Resource Subtype: | Zinc | |
| Element(s): | Kis Zn Cu |
| Importance |
| Raw material meaning: | Little Importance (reg. 18.02.2015) |
| Resources and production |
| Activity: | Mining | Reserves: | ||
| Operating method: | Open pit and underground mining | Historical production: |
Operations |
| From - To | Activity | Comments | |
| 1983 - 1984 | Geophysics | Company/Institution :Folldal Verk A/S | |
| 1984 - 1984 | Geochemistry | Company/Institution :Folldal Verk A/S | |
| 1984 - 1985 | Sampling | Company/Institution :Folldal Verk A/S | |
| 1984 - 1985 | Geology | Company/Institution :Folldal Verk A/S | |
| 1997 - 1997 | Sampling | Company/Institution :NGU-Malmreg. |
Mineralization |
| Genesis: | Volcex | Form: | ||
| Main texture: | Banded | Min. distribution: | Massive (>50 % ore minerals) |
| Main grain size: | Medium grained (1-3 mm) | Main alteration: |
| Strike/Dip: | 10 / 70 | Direction: | ||
| Plunge: |
| Stratigraphic classification of host rock |
| Era: | Period: |
| Province: | Caledonides | |
| Geotec.unit: | Trondheim Nappe Complex | |
| Tectonic complex: | Støren Nappe | |
| Igneous complex: |
| Group: | Støren | Formation: |
Mineralogy |
| Relationship | Mineral | Amount | |
| Gangue mineral | Quartz | Major mineral (>10%) | |
| Ore mineral | Pyrite | Major mineral (>10%) | |
| Ore mineral | Pyrrhotite | Major mineral (>10%) | |
| Ore mineral | Chalcopyrite | Subordinate mineral (1-10%) | |
| Ore mineral | Sphalerite | Subordinate mineral (1-10%) | |
| Ore mineral | Hematite | Accessory mineral (<1%) | |
| Ore mineral | Ilmenite | Accessory mineral (<1%) | |
| Ore mineral | Magnetite | Accessory mineral (<1%) |
Lithology: |
| Relationship | Rock | Origin | |
| Wall rock | Quartzite | Sedimentary Original rock :Siliceous rock |
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| Metamorphic facies :Greenschist | |||
| Wall rock | Amphibolite | Extrusive Original rock :Basalt |
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| Metamorphic facies :Greenschist |
Structures |
| Location: | Type: | Orientation(360 gr.): | Relation to min.: | |
| Wall rock | Foliation | Strike/Dip :10 / 70 | Post-mineralisation ;...Effect :None |
Information(s) in free text format |
| Description |
| The Nyberget mine is mined over a distance of 200 m from the river Orkla and southwards. The Nyberget mine and adjacent prospects constitute some Rennebu-type sulphide deposits within a higher-grade metamorphic milieu. A lateral thinning of the greenstone units and an increasing influx of tuffaceous material is apparent here. A rapid vertical change of the volcanogenic units is conspicuous and the sulphide deposits are here invariably confined to the border between the thin greenstone horizons, metamorphosed into schistose, dark amphibolites, and the adjacent tuffaceous units, usually developed as impure, banded quartzites and biotite schists. The ore body at Nyberget mine appears as a composite sheet, 0.5-3 m in thickness, conformably emplaced between two greenstone units and has been followed for about 300 m along its strike. Massive, medium-grained pyrite ore is close to the greenstone and is chiefly composed of granoblastic pyrite with interstitial minor sphalerite and magnetite. Towards the hanging wall it grades into weak pyrrhotite- and chalcopyrite-disseminations within the quartzites. Dark, garnetiferous biotite-magnetite rocks - partly disseminated with pyrrhotite - overlie the sulphide mineralizations. They are generally found as distinct layers, 5-10 m in thickness, close to the amphibolites in the area. Pink, cherty inclutions are frequently found, and reveal their affinity with the black felses to the north. The magnetite of the wall-rock quartzite is locally replaced by pyrrhotite along the margins of the sulphide ore. Magnetite (+-garnet +- epidote) is, furthermore, a common constituent as laminae between the quartzite bands of the banded quartzite of the area. Swarms of trondhjemite dykes have been conformably injected along the different units and cut through the ore body at Nyberget. |
Bibliography: |
| From NGU's Reference Archive: |
| Gullichsen, E.; Vogt, J.H.L. , 1899 |
| Kisforkomster langs den prosjekterende Sell-Støren-jernbanen. |
| ;Norges geologiske undersøkelse;FAGRAPPORT;Bergarkivet; No.BA 3945;14 pages |
| Abstract: | |
| Rapporten er et særtrykk av Teknisk Ukeblad og beskriver kisforekomster på strekningen Sel-Støren. Avhandlingen er utarbeidet i forbindelse med forlengelsen av jernbanen på overnevnte strekning. Det er gitt en geografisk, malmgeologisk og historisk oversikt i tillegg til feltenes malmreserver, produksjonsevne og malmens mineralogi. Følgende gruver og malmfelt er behandlet: -Undal Kisgruve -Vårstiens kisfelt -Foldalens kisfelt -Kvikne Gruber. Helleskiferen i Oppdal blir også nevnt sammen med klebersteinforekomster i området (JS 85) |
| Nilsen, Odd , 1978 |
| Caledonian sulphide deposits and minor iron-formations from the southern Trondheim region, Norway. |
| ;Norges geologiske undersøkelse;TIDSSKRIFTARTIKKEL;NGU; No.340;35-85 + k pages |
| Abstract: | |
| Within the southern and central parts of the Trondheim region of the Norwegian Caledonides a great number of small, stratabound cupriferous pyrite deposits are confined to mafic metavolcanics of the Gula, Støren and Fundsjø Groups of the Lower Palaeozoic succession. The deposits occuring within, or in close contact with the metavolcanics are characterized by their association with minor manganiferous oxide/silicate iron-formations - better known as "vasskis" ore type - within the metamorphic low-grade areas. The iron-fprmations of the metamorphic higher grade terrains on the other hand, which are extensively developed within the Gula Group, are mostly of a pyrrhotitic sulphide/silicate type and sulphurization processes are thought to have played an important role during the metamorphism. The pyrite deposits occurring adjacent to the metavolcanics bear no relationship to the iron-formations. They are embedded in pelitic, often carbonaceous assemblages (Gula Group) or within tuffitic members of the volcanogene Støren Group, and they are thought to represent re-sedimented (reworked) deposits. The pyrite deposits display varying degree of metamorphic reconstitution and a tectonic control has apparently determined their disc- or ruler-shaped morphology. |
| References not to be found in NGU's Reference Archive.: |
| Bakke, O. 1984: Oppdal project. Intern rapp. Folldal Verk A/S. BV 3018 |
| Bakke, O. 1984: Oppdal prosjekt. Intern rapp. Folldal Verk A/S. BV 3019 |
Fieldsamples |
| Sample No. | Sample type | Miscellanrous | ||||
| ST0087.01 | Dump |
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| ST0087.02 | Dump |
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| ST0087.03 | Dump |
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| ST0087.04 | Dump |
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| ST0087.05 | Dump |
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| NB! All analyse values are shown at the end of the printout.: |
Analyse Results |
| from |
| Deposit Area 5022 - 023 Nyberget |
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# |
| ST0087.01 | Dump | 669 | 6346 | 796 | 395 | 35 | 7.3 | 47.0 |
| ST0087.02 | Dump | 2456 | 10643 | 112 | 232 | 10 | 5.6 | 60.0 |
| ST0087.03 | Dump | 12646 | 60594 | 598 | 129 | 179 | 7.6 | 8.0 |
| ST0087.04 | Dump | 20202 | 64001 | 610 | 29 | 151 | 18.0 | 35.0 |
| ST0087.05 | Dump | 4230 | 81134 | 730 | 35 | 175 | 6.7 | 18.0 |
| ------------------ |
| Sample No. | Pt# | Pd# | As* | Cd* | Ba* | Mo* | Sb* | Bi* | S% |
| ST0087.01 | 1.0 | 2.0 | 210 | 25.0 | -1 | 6.00 | 3 | 21 | 26.80 |
| ST0087.02 | 6.0 | -1.0 | 35 | 36.7 | 14 | 3.00 | -3 | 9 | 42.70 |
| ST0087.03 | 2.0 | 2.0 | -2 | 171.1 | 10 | 25.00 | 3 | 28 | 26.30 |
| ST0087.04 | 1.0 | -1.0 | -2 | 170.5 | 1 | 33.00 | -3 | 27 | 22.40 |
| ST0087.05 | -1.0 | 2.0 | -2 | 215.8 | -1 | 31.00 | -3 | 26 | 28.70 |
| ------------------ |
| Sample No. | V* | Cr* | Mn* | Fe% | Th* | U* | W* | Sr* | La* |
| ST0087.01 | 144 | 17 | 70 | 16.52 | 4.00 | -8.00 | 10 | 1.0 | -1.00 |
| ST0087.02 | 73 | 33 | 136 | 17.62 | 5.00 | -8.00 | 3 | 5.0 | -1.00 |
| ST0087.03 | 80 | 9 | 170 | 41.83 | 7.00 | -8.00 | -2 | 2.0 | 1.00 |
| ST0087.04 | 174 | 15 | 319 | 34.13 | 7.00 | -8.00 | 13 | 3.0 | 1.00 |
| ST0087.05 | 113 | 9 | 312 | 40.58 | 7.00 | -8.00 | -2 | 3.0 | -1.00 |
| ------------------ |
| Sample No. | B* | ||||||||
| ST0087.01 | -3 | ||||||||
| ST0087.02 | -3 | ||||||||
| ST0087.03 | 12 | ||||||||
| ST0087.04 | 5 | ||||||||
| ST0087.05 | -3 |
| The fact sheet was created on 07.05.2024 |
| Questions or comments regarding the fact sheet can be emailed to: ressursdatabaser@ngu.no |
| Copyright © 2024 Geological Survey of Norway |