(Last updated: 01.07.1998)
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Norsk versjon | ||||
| THE ORE DATABASE | |||||
| Occurence 5022 - 013 Vasli | |||||
| (Object Id: 4276) (Last updated: 01.07.1998) |
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| Location |
| County: | Trøndelag | Municipality: | Rennebu (5022) |
| Map 1:50000: | Rennebu (1520-1) | Map 1:250000: | Røros |
| Coordinate system: | EU89-UTM Zone 32 |
| East: | 550828 m. | North: | 6972337 m. |
| Longitude: | 9.9993170 | Latitude: | 62.8775190 |
| 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: | Test mining | Reserves: | ||
| Operating method: | Underground mining | Historical production: |
Operations |
| From - To | Activity | Comments | |
| 1970 - 1970 | Geology | Company/Institution :P.A. Lindberg | |
| 1985 - 1985 | Geology | Company/Institution :O. Nilsen, UiO | |
| 1985 - 1985 | Geophysics | Company/Institution :Folldal Verk A/S | |
| 1997 - 1997 | Sampling | Company/Institution :NGU-Malmreg. |
Mineralization |
| Genesis: | Sedex | Form: | Layer | |
| Main texture: | Banded | Min. distribution: | Massive (>50 % ore minerals) |
| Main grain size: | Fine grained (< 1 mm) | Main alteration: | Sericitisation |
| Strike/Dip: | 315 / 80 | Direction: | ||
| Plunge: |
| Stratigraphic classification of host rock |
| Era: | Period: |
| Province: | Caledonides | |
| Geotec.unit: | Trondheim Nappe Complex | |
| Tectonic complex: | Gula Nappe | |
| Igneous complex: |
| Group: | Gula | Formation: | Undal |
Mineralogy |
| Relationship | Mineral | Amount | |
| Gangue mineral | Quartz | Major mineral (>10%) | |
| Gangue mineral | Sericite | Subordinate mineral (1-10%) | |
| Gangue mineral | Feldspar | Subordinate mineral (1-10%) | |
| Gangue mineral | Biotite | Subordinate mineral (1-10%) | |
| Gangue mineral | Amphibole | Subordinate mineral (1-10%) | |
| Ore mineral | Pyrrhotite | Major mineral (>10%) | |
| Ore mineral | Pyrite | Major mineral (>10%) | |
| Ore mineral | Chalcopyrite | Accessory mineral (<1%) |
Lithology: |
| Relationship | Rock | Origin | |
| Wall rock | Amphibole biotite schist | Sedimentary Original rock :Tuffite |
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| Metamorphic facies :Greenschist | |||
| Wall rock | Bandquartzite | Sedimentary Original rock :Muddy sandstone |
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| Metamorphic facies :Greenschist | |||
| Wall rock | Phyllite | Sedimentary Original rock :Mudstone |
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| Metamorphic facies :Greenschist |
Structures |
| Location: | Type: | Orientation(360 gr.): | Relation to min.: | |
| Wall rock | Foliation | Strike/Dip :315 / 80 | Post-mineralisation ;...Effect :None | |
| Wall rock | Fold axis | Dir./Plunge :125 / 35 | Post-mineralisation ;...Effect :Modifies |
Information(s) in free text format |
| Description |
| Det er drevet prøvedrift på forekomsten sannsynligvis en gang på 1800-tallet. "Gamle Vasli grube" ble mutet i 1902. Mineraliseringen ble undersøkt i 1970 av Lindberg (1971) og i 1976 av Nilsen & Rohr-Torp (1976). Folldal Verk A/S målte i 1985 geofysikk i stikningsnett over forekomsten. To kissoner løper parallelt i NV-SØ-lig retning i en vekslende serie av gråbrune, finkornige kvartsfyllitter og båndkvartsitt. Den SV-lige er undersøkt med en synk, nå vannfylt, og en 10 m lang NØ-SV-gående grøft 3 m NV for synken (tilsammen 30 m3 tipp). I synken er den semimassive magnetkis-svovelkis-mineraliseringen minst 2 m mektig, i grøfta er den sammenfoldet til 4-5 m mektighet med semimassiv magnetkis i amfibolholdig biotitt-fyllitt med dm-mektige svovelkislag og båndkvartsitt med magnetkis-impregnasjon. I NØ-enden av grøfta, 4 m høyere i stratigrafien, står nok en mineralisering, 3 m mektig, som sannsynligvis er den samme foldede horisont. Strøkretning: 330/60. Den NØ-lige kissonen er oppfart med en 25 m lang NV-SØ-gående røsk langs kissonen (25 m NØ for synken). En 16 m lang dagstrosse, som fortsetter i en 6 m lang stoll, er drevet inn i SSV-lig retning 5 m under utgående. 20 m NV for stollinnslaget er det et lite skjerp i samme mineralisering. Kissonen er 2 m mektig og består av semimassiv magnetkis i amfibol-biotittskifer. Den fører også et ca. 0.5 m mektig lag av finkornig semimassiv til massiv svovelkis i hvit kvarts-feltspat-serisittskifer. Sidestein er kvarts-feltspatrik fyllitt. Foldeakse og lineasjon: 125/30-40. Foliasjon i utgående over stollinnslaget: 315/80. Kissonene er oppsprukket og forkastet etter et sprekkesystem med retning 220-240/45-55, langs hvilke også metertykke trondhjemittganger løper. |
Bibliography: |
| From NGU's Reference Archive: |
| 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. |
| Lindberg, Per Aksel , 1971 |
| En geologisk og petrografisk undersøkelse med malmgeologiske betraktninger i området Berkåk - Soknedal, Sør-Trøndelag. |
| ;UiO Geografisk inst.;AVHANDLING |
| References not to be found in NGU's Reference Archive.: |
| Bakke, O. 1984: Oppdal project. Intern rapp. Folldal Verk A/S. BV 3018 |
| Nilsen, O. & Rohr-Torp, E. 1976: Rapport fra malmgeologiske undersøkelser i Rennebu sommeren 1976. BV 3913. |
Fieldsamples |
| Sample No. | Sample type | Miscellanrous | ||||
| ST0073.01 | Bedrock |
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| ST0073.02 | Bedrock |
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| NB! All analyse values are shown at the end of the printout.: |
Analyse Results |
| from |
| Deposit Area 5022 - 013 Vasli |
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# |
| ST0073.01 | Bedrock | 221 | 206 | 61 | 15 | 98 | .8 | 29.0 |
| ST0073.02 | Bedrock | 17 | 46 | 60 | 12 | 31 | .4 | 41.0 |
| ------------------ |
| Sample No. | Pt# | Pd# | As* | Cd* | Ba* | Mo* | Sb* | Bi* | S% |
| ST0073.01 | 5.0 | 3.0 | 52 | .9 | 37 | 12.00 | 23 | 9 | 15.00 |
| ST0073.02 | 1.0 | 2.0 | 246 | -.2 | -1 | 2.00 | -3 | 5 | 43.30 |
| ------------------ |
| Sample No. | V* | Cr* | Mn* | Fe% | Th* | U* | W* | Sr* | La* |
| ST0073.01 | 22 | 14 | 532 | 22.19 | 11.00 | -8.00 | 3 | 12.0 | 16.00 |
| ST0073.02 | 5 | 10 | 50 | 16.13 | 5.00 | -8.00 | 5 | 3.0 | 1.00 |
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| Sample No. | B* | ||||||||
| ST0073.01 | 6 | ||||||||
| ST0073.02 | 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 |