(Last updated: 23.04.2015)
|
|
Norsk versjon | ||||
| THE ???? DATABASE | |||||
| Occurence 0 - 000 FEIL | |||||
| (Object Id: ) (Last updated: 23.04.2015) |
|||||
|
|
| Location |
| County: | Municipality: | Mangler () |
| Map 1:50000: | Kvikne (1620-3) | Map 1:250000: | Røros |
| Coordinate system: | UTM-Zone 33 - EUREF89/WGS84 |
| East: | 569940 m. | North: | 6935520 m. |
| Longitude: | 10.3612100 | Latitude: | 62.5443260 |
| Show on map |
|
|
| 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: | Test mining | Reserves: | ||
| Operating method: | Underground mining | Historical production: |
Operations |
| From - To | Activity | Comments | |
| 1795 - 1796 | Test mining | Company/Institution :Kvikne Kobberværk | |
| 1975 - 1976 | Geophysics | Company/Institution :Sulfidmalm A/S | |
| VLF and magnetic survey | |||
| 1975 - 1976 | Geology | Company/Institution :Sulfidmalm A/S | |
| 1975 - 1976 | Core drilling | Company/Institution :Sulfidmalm A/S | |
| 6 holes totalling 269.9 m, best result 1.78 % Ni, 1.18 m Cu and 22.5 % S over 1.5 m in DDH 2. | |||
| 1998 - 1998 | Sampling | Company/Institution :NGU | |
| 2004 - 2004 | Geophysics | Company/Institution :Blackstone Ventures Inc./Sulfidmalm AS | |
| Aerial survey covering Olkar, Kaltberget and Vakkerlien |
Mineralization |
| Era: | Proterozoic | Period: | Neoproterozoic | |
| Genesis: | Orthomagmatic formation | Form: | Lens | |
| Main texture: | Massive | Min. distribution: | Massive (>50 % ore minerals) |
| Main grain size: | Fine grained (< 1 mm) | Main alteration: | No country rock alteration |
| Strike/Dip: | 80 / 20 | Direction: | ||
| Plunge: |
| Stratigraphic classification of host rock |
| Era: | Proterozoic | Period: | Neoproterozoic |
| Province: | Caledonides | |
| Geotec.unit: | Trondheim Nappe Complex | |
| Tectonic complex: | Gula Nappe | |
| Igneous complex: |
| Group: | Gula | Formation: |
Mineralogy |
| Relationship | Mineral | Amount | |
| Gangue mineral | Amphibole | Major mineral (>10%) | |
| Gangue mineral | Plagioclase | Major mineral (>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%) | |
| Ore mineral | Pentlandite | Subordinate mineral (1-10%) | |
| Ore mineral | Pyrite | Subordinate mineral (1-10%) |
Lithology: |
| Relationship | Rock | Origin | |
| Host rock | Metagabbro | Intrusive Original rock :Gabbro |
|
| Metamorphic facies :Amphibolite | |||
| Wall rock | Quartz-biotite schist | Sedimentary Original rock :Greywacke |
|
| Metamorphic facies :Amphibolite |
Structures |
| Location: | Type: | Orientation(360 gr.): | Relation to min.: | |
| Wall rock | Schistosity | Strike/Dip :82 / 25 | Post-mineralisation ;...Effect :Modifies |
Information(s) in free text format |
| Free text |
| The deposit is situated at both sides of the river Orkla, some 2.5km WS of Yset. As per today, the main pit is in the northern part of the river. During operation, the pit saw many problems with water seeping in, and an attempt was made to channel the river to a new bedding. In addition there are other pits at either side of the river. Sulfidmalm A/S investigated the area in 1975-1976 by geological and geophysical mapping as well as drilling of 6 cores with a total length of 270m (Sivertsen & Nixon 1976). Several metagabbroic lenses of up to 2m thick band with massive pyrrhotite, chalcopyrite and pyrite were found. The sulphide mineralization is discontinuous and the deposit is thus considered not to be of economic interest (Sulfidmalm 1982). The main pit is flooded and located in the northern part of the river. A very rusty sulphide mineralized zone oriented 80E/20E can be observed along the river bank. This zone is 0.5-1.2m thick and consists of dispersed pyrrhotite and chalcopyrite in particular schistose rock (sample HE0152.02). It is supposed that this represents the margin of a metagabbro, and borders on a quartz-biotite schist towards the north. The ultramafic body is one of many related to the mafic metavolcanics of the Gula group (Nilsen & Mukherjee 1972, Nilsen 1987). The 12m long, 2-3m wide and 1-2m high tailings heap of the main production pit is assumed to be located at the south side of the river. Representative samples with massive to semi-massive pyrrhotite and chalcopyrite were collected from there. Chalcopyrite is typically concentrated along small quartz lenses in the massive ore. |
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. |
| References not to be found in NGU's Reference Archive.: |
| Sulfidmalm A/S 1982: Undersøkelsesrapport knyttet til mutinger over Kaltberget og Olkar forekomster. Bergvesenet rapport, BV 377. |
| Sivertsen, R. & Nixon, F. 1976: Investigations in the Kvikne region, 1976. Geophysical survey and diamond drilling in the Olkar grid. Bergvesenet rapport BV 520. |
Fieldsamples |
| Sample No. | Sample type | Miscellanrous | ||||
| HE0152.02 | Bedrock |
|
| NB! All analyse values are shown at the end of the printout.: |
Name of Sample point: Olkar tippen |
| (Object Id: 10206 48,00,01) |
|
|
| Location |
| County: | Municipality: | Mangler () |
| Map 1:50000: | Kvikne (1620-3) | Map 1:250000: | Røros |
| Coordinate system: | UTM-Zone 33 - EUREF89/WGS84 |
| East: | 569920 m. | North: | 6935490 m. |
| Longitude: | 10.3608090 | Latitude: | 62.5440600 |
| Show on map |
|
|
| Resource |
| Resource Type: | Ferroalloys (Cr,Ni,Co,V,Mo,W) | Resource Subtype: | Nickel | |
| Element(s): | Ni Cu |
Fieldsamples |
| Sample No. | Sample type | Miscellanrous | ||||
| HE0152.01 | Dump |
|
||||
| HE0152.03 | Dump |
|
||||
| HE0152.04 | Dump |
|
| NB! All analyse values are shown at the end of the printout.: |
Name of Locality: Olkar nordre sjakt |
| (Object Id: 10207 48,01,00) |
|
|
| Location |
| County: | Municipality: | Mangler () |
| Map 1:50000: | Kvikne (1620-3) | Map 1:250000: | Røros |
| Coordinate system: | UTM-Zone 33 - EUREF89/WGS84 |
| East: | 569960 m. | North: | 6935540 m. |
| Longitude: | 10.3616070 | Latitude: | 62.5445010 |
| Show on map |
|
|
| Resource |
| Resource Type: | Ferroalloys (Cr,Ni,Co,V,Mo,W) | Resource Subtype: | Nickel | |
| Element(s): | Ni Cu |
| Resources and production |
| Activity: | Mining | Reserves: | ||
| Operating method: | Underground mining | Historical production: |
Information(s) in free text format |
| Free text |
| En dyp, vannfylt synk ligger ca. 25 m nord for hovedsynken i elva. Bare de øvre deler av den sørøstlige veggen er tilgjengelig. Der finnes finkornet kvarts-biotittskifer med enkelte kvartslinser, og foliasjonen til skiferen er 22°/15°. Sulfidmineralisering er ikke påvist verken i synken eller på den gjenvokste tippen som ligger i brattskråning ned mot elva. |
Name of Locality: Olkar søndre sjakt |
| (Object Id: 10208 48,02,00) |
|
|
| Location |
| County: | Municipality: | Mangler () |
| Map 1:50000: | Kvikne (1620-3) | Map 1:250000: | Røros |
| Coordinate system: | UTM-Zone 33 - EUREF89/WGS84 |
| East: | 569960 m. | North: | 6935470 m. |
| Longitude: | 10.3615780 | Latitude: | 62.5438730 |
| Show on map |
|
|
| Resource |
| Resource Type: | Ferroalloys (Cr,Ni,Co,V,Mo,W) | Resource Subtype: | Nickel | |
| Element(s): | Ni Cu |
| Resources and production |
| Activity: | Mining | Reserves: | ||
| Operating method: | Underground mining | Historical production: |
Information(s) in free text format |
| Free text |
| En vannfylt synk med vegger 4x4 m ligger ca. 25 m sør for elva. Tilnærmet flattliggende kvarts-biotittskifer finnes i veggene. Den samme skiferen med foliasjon 84°/15° finnes også i spredte blotninger mellom denne synken og elva. Tippen er svært overgrodd og sulfidmineraliserte blokker er ikke observert. |
| The fact sheet was created on 02.05.2024 |
Copyright © 2024 Geological Survey of Norway |