(Last updated: 01.07.1998)
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Norsk versjon | ||||
| THE ORE DATABASE | |||||
| Occurence 5022 - 007 Mærk | |||||
| (Object Id: 4270) (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: | 540918 m. | North: | 6975647 m. |
| Longitude: | 9.8053310 | Latitude: | 62.9084700 |
| 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: |
Operations |
| From - To | Activity | Comments | |
| 1997 - 1997 | Sampling | Company/Institution :NGU-Malmreg. |
Mineralization |
| Genesis: | Volcex | Form: | ||
| Main texture: | Banded | Min. distribution: | Massive (>50 % ore minerals) |
| Main grain size: | Fine grained (< 1 mm) | Main alteration: |
| Strike/Dip: | 315 / 20 | Direction: | ||
| Plunge: |
| Stratigraphic classification of host rock |
| Era: | Period: |
| Province: | Caledonides | |
| Geotec.unit: | Blåhø-Surna Nappe Complex | |
| Tectonic complex: | Blåhø Nappe | |
| Igneous complex: |
| Group: | Blåhø | Formation: |
Mineralogy |
| Relationship | Mineral | Amount | |
| Gangue mineral | Amphibole | Major mineral (>10%) | |
| Gangue mineral | Quartz | Subordinate mineral (1-10%) | |
| Ore mineral | Pyrite | Major mineral (>10%) | |
| Ore mineral | Pyrrhotite | Major mineral (>10%) | |
| Ore mineral | Chalcopyrite | Accessory mineral (<1%) |
Lithology: |
| Relationship | Rock | Origin | |
| Wall rock | Garnet amphibolite | Extrusive Original rock :Basalt |
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| Metamorphic facies :Amphibolite |
Structures |
| Location: | Type: | Orientation(360 gr.): | Relation to min.: | |
| Wall rock | Foliation | Strike/Dip :315 / 20 | Post-mineralisation ;...Effect :None |
Information(s) in free text format |
| Description |
| Skjerpet ligger på innmark, 60-70 m øst for et hus. Iflg. grunneier var det her to skjerp, som ble gjenfylt på 1960-tallet pga. at surt kisvatn rant utover beitemarka. I dag sees bare antydning til en fordypning og en nærliggende 5 m3 stor tipp. Stuffer herfra viser: 1) fin- til middelskornig, massiv magnetkis-svovelkis-mineralisering (prøve 01) med tildels grovkornig (opptil 4-5 mm) svovelkis og lange amfibolnåler, og 2) og semimassiv til massiv, fin- til middelskornig svovelkis-mineralisering i amfibolitt (prøve 02). Like ved er en liten rygg av sidesteinen, granatamfibolitt, blottet. Bugge (1910) skriver: "Mærk skjærp viser 2 svovlkisbænke, der ligger umiddelbart ved siden av hverandre. Mæktigheden af begge bænke var tilsammen 1.25 m. De var kun synlig i 3 meters længde, men er sikkert længere." Ved Reberg, omlag 1 km mot SØ til ØSØ, utførte Folldal Verk A/S undersøkelser (geologisk kartlegging, geofysiske målinger og prøvetaking) i stikningsnett i 1984-85 (Bakke 1984 og 1985). Det ble påvist flere kraftige elektromagnetiske ledere fulgt av magnetiske anomalier. En av dem ble identifisert som en nesten massiv magnetkishorisont. På siden av denne opptrer rustsoner med disseminert magnetkis som viser analyseverdier på opptil 0.3 % Cu. Mineraliseringen ble ikke funnet ved befaringen i den svært tett skogbevokste lia i 1997. |
Bibliography: |
| From NGU's Reference Archive: |
| Bugge, Carl , 1910 |
| Rennebu. Fjeldbygningen inden rektangelkartet Rennebus omraade |
| ;Norges geologiske undersøkelse;TIDSSKRIFTARTIKKEL; KARTBESKRIVELSE;NGU; No.56;42 pages |
| Abstract: | |
| Forkortet: The Rennebu sheet embraces an area of about 590 square miles, situated about 28 miles south of Trondheim. Professor Tørnebohm (p.6) and Professor Kjerulf (p.6) have each given their view of the geological structure. The author's division is mentioned on p.9. It coincides in the main with Kjerulf's. First the Røros group is described, then the Hovind group. Above the Hovind group lie layers of breccia, the so-called breccia-slate (Brøgger), which consists of sometimes rounded fragments, and which the author supposes represents a disconcordance. Above these lies the Støren group, which consists of slates, sandstones, breccias, and variolitic diabase. The study of the geology of these regions was undertaken in 1903 by the geologist of Sverdrup's North Polar Expedition, P. Schei, but was interrupted by his sudden death. He had not published his views; but from a lecture that he delivered in the Norwegian Geological Society, it appeared that he compared these diabase with Scotch and English "pillow lavas". As such the author has here described them. |
| 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 | ||||
| ST0067.01 | Dump |
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| ST0067.02 | Dump |
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| NB! All analyse values are shown at the end of the printout.: |
Analyse Results |
| from |
| Deposit Area 5022 - 007 Mærk |
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# |
| ST0067.01 | Dump | 799 | 26 | 14 | 38 | 78 | 1.6 | 10.0 |
| ST0067.02 | Dump | 395 | 64 | 5 | 26 | 55 | .5 | 3.0 |
| ------------------ |
| Sample No. | Pt# | Pd# | As* | Cd* | Ba* | Mo* | Sb* | Bi* | S% |
| ST0067.01 | 6.0 | 8.0 | -2 | -.2 | 6 | 1.00 | -3 | -3 | 33.90 |
| ST0067.02 | 2.0 | 4.0 | 12 | .7 | 9 | 2.00 | -3 | -3 | 23.40 |
| ------------------ |
| Sample No. | V* | Cr* | Mn* | Fe% | Th* | U* | W* | Sr* | La* |
| ST0067.01 | 21 | 3 | 234 | 40.69 | 9.00 | -8.00 | -2 | 10.0 | 5.00 |
| ST0067.02 | 19 | 9 | 191 | 24.04 | 5.00 | -8.00 | -2 | 7.0 | 7.00 |
| ------------------ |
| Sample No. | B* | ||||||||
| ST0067.01 | -3 | ||||||||
| ST0067.02 | 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 |