(Last updated: 28.03.2020)
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Norsk versjon | ||||
| THE ORE DATABASE | |||||
| Occurence 4028 - 019 Toråsdekkane | |||||
| (Object Id: 5459) (Last updated: 28.03.2020) |
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| Location |
| County: | Telemark | Municipality: | Kviteseid (4028) |
| Map 1:50000: | Bandak (1513-1) | Map 1:250000: | Skien |
| Coordinate system: | EU89-UTM Zone 32 |
| East: | 464362 m. | North: | 6586069 m. |
| Longitude: | 8.3721940 | Latitude: | 59.4117400 |
| Show on map |
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| Resource |
| Resource Type: | Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) | Resource Subtype: | Copper | |
| Element(s): | Cu |
| 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 | |
| 1901 - 1906 | Pitting | Company/Institution :Christiania Minekompani | |
| 2006 - 2006 | Sampling | Company/Institution :NGU |
Mineralization |
| Era: | Proterozoic | Period: | Mesoproterozoic | |
| Genesis: | Hydrothermal vein | Form: | Lens | |
| Main texture: | Fracture filling | Min. distribution: | Irregular (scattered) |
| Main grain size: | Fine grained (< 1 mm) | Main alteration: | Chloritisation |
| Strike/Dip: | 90 | Direction: | ||
| Plunge: |
| Stratigraphic classification of host rock |
| Era: | Proterozoic | Period: | Mesoproterozoic |
| Province: | South Norwegian Basement Province | |
| Geotec.unit: | Telemark Supergroup | |
| Tectonic complex: | ||
| Igneous complex: |
| Group: | Formation: | Transtaulhøgdi supracrustals |
Mineralogy |
| Relationship | Mineral | Amount | |
| Gangue mineral | Quartz | Major mineral (>10%) | |
| Ore mineral | Chalcopyrite | Major mineral (>10%) | |
| Ore mineral | Bornite | Major mineral (>10%) |
Lithology: |
| Relationship | Rock | Origin | |
| Host rock | Greenstone | Extrusive Original rock :Basalt |
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| Metamorphic facies :Greenschist |
Structures |
| Location: | Type: | Orientation(360 gr.): | Relation to min.: | |
| Host rock | Foliation | Strike/Dip :257 / 70 | Syn-mineralisation ;...Effect :Controls |
Information(s) in free text format |
| Free text |
| Forekomsten ligger øst for en sidevei til bomveien opp fra Tveitgrendi, nordvest for Kviteseid. Hovedskjerpet består av en 14 m lang, hovedsakelig vannfylt dagskjæring på toppen av en Ø-V orientert rygg, og 5 m øst for denne skjæringa er anlagt på et litt lavere nivå en 5x5 m dagskjæring som er opptil 2,5 m høy. Christiania Minekompani utførte arbeidene i perioden 1901-06. Ryggen består av foliert grønnstein med kraftig utvikla kløv. Kobbermineraliserinegene opptrer i kvartsganger som er minst 10 cm mektige. Både aggregater og strenger av bornitt og kobberkis finnes i middelskornet, melkehvit kvarts på tippen. Til tross for at det er flere mindre skjerp i det samme området har forekomsten ubetydelig utbredelse. |
Bibliography: |
| From NGU's Reference Archive: |
| Dons, Johannes A. , 1963 |
| De prekambriske bergarter i Telemark, I. Gruber og skjerp innen gradeteigkart E36V Kviteseid. |
| ;Norges geologiske undersøkelse;TIDSSKRIFTARTIKKEL;NGU; No.216;1-80 pages |
| Abstract: | |
| Approximately 115 mines and claims have been examined in the years 1941-1961 during regional geological mapping of the Kviteseid quadrangle. The map area covers a part of the "Thelemark-Sætersdal ore province" established by prof. J.H.L. Vogt in 1886. The oldest mine in the area, opened in the year 1524, was worked for silver bearing chalcopyrite and bornite. Other mines have been worked for gold, native copper and silver, molybdenite, galena, arsenopyrite, bismuthinite. All the mines have long since been abandoned and most of the surface workings are overgrown and difficult to find. The 15 native copper and silver deposits (which also contain vanadium minerals) form a separate group. They are all situated along the contact between a sandstone and an overlying basalt, the ore being confined to the sandstone. Most of the other deposits are of Quartz vein type. In quartzites which cover the greatest part of the map area, most of the quartz veins are barren. The great abundance of ore minerals in quartz veins in basic lavas and basic sills may be due to favourable pH conditions in these rocks. The galena deposits are found within a limited area close to a penetrating granite. The ore mineral paragenese in some of the deposits may have been formed under hypothermal to mesothermal conditions whereas other possibly originated at lower temperatures. |
Fieldsamples |
| Sample No. | Sample type | Miscellanrous | ||||
| TE0072.02 | Dump |
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| NB! All analyse values are shown at the end of the printout.: |
Name of Locality: Toråsdekkane V |
| (Object Id: 17759 19,01,00) |
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| Location |
| County: | Telemark | Municipality: | Kviteseid (4028) |
| Map 1:50000: | Bandak (1513-1) | Map 1:250000: | Skien |
| Coordinate system: | EU89-UTM Zone 32 |
| East: | 464347 m. | North: | 6586056 m. |
| Longitude: | 8.3719320 | Latitude: | 59.4116220 |
| Show on map |
|
|
| Resource |
| Resource Type: | Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) | Resource Subtype: | Copper | |
| Element(s): | Cu |
| Resources and production |
| Activity: | Pitting | Reserves: | ||
| Operating method: | Historical production: |
Mineralogy |
| Relationship | Mineral | Amount | |
| Gangue mineral | Quartz | Major mineral (>10%) | |
| Ore mineral | Chalcopyrite | Major mineral (>10%) |
Lithology: |
| Relationship | Rock | Origin | |
| Host rock | Greenstone | Extrusive Original rock :Basalt |
|
| Metamorphic facies :Greenschist |
Structures |
| Location: | Type: | Orientation(360 gr.): | Relation to min.: | |
| Host rock | Schistosity | Strike/Dip :92 / 85 | Syn-mineralisation ;...Effect :Controls |
Information(s) in free text format |
| Free text |
| Dette er et mindre skjerp i sørskråningen av den samme ryggen hvor hovedskjerpet ligger. En 4 m lang og 1-2 m bred skjæring er drevet i trappetrinn inn mot nordveggen som er 2 m høy. En 1-3 cm bred kvartsåre med relativt rik kobberkismineralisering finnes i noe forskifret, karbonatførende grønnstein/amfibolitt i denne veggen. |
Fieldsamples |
| Sample No. | Sample type | Miscellanrous | ||||
| TE0072.01 | Bedrock |
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| NB! All analyse values are shown at the end of the printout.: |
Analyse Results |
| from |
| Deposit Area 4028 - 019 Toråsdekkane |
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# |
| TE0072.01 | Bedrock | 37550 | -100 | 200 | 10 | 20 | 148.0 | 40.0 |
| TE0072.02 | Dump | 9510 | -100 | -100 | -10 | 20 | 24.0 | 30.0 |
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| Sample No. | As* | Cd* | Mo* | Sb* | Bi* | Cr* | Mn* | Fe% | W* |
| TE0072.01 | 200 | -10.0 | 10.00 | 10 | -100 | 40 | 700 | 3.09 | -10 |
| TE0072.02 | -100 | -10.0 | 20.00 | -10 | -100 | 30 | 300 | 1.18 | -10 |
| ------------------ |
| Sample No. | Sr* | P* | Ca* | ||||||
| TE0072.01 | -10.0 | 0 | 0 | ||||||
| TE0072.02 | 10.0 | 0 | 1 |
| The fact sheet was created on 26.04.2024 |
| Questions or comments regarding the fact sheet can be emailed to: ressursdatabaser@ngu.no |
| Copyright © 2024 Geological Survey of Norway |