(Last updated: 28.03.2020)
|
|
Norsk versjon | ||||
| THE ORE DATABASE | |||||
| Occurence 4028 - 002 Tjørnstaul | |||||
| (Object Id: 5441) (Last updated: 28.03.2020) |
|||||
|
|
| Location |
| County: | Telemark | Municipality: | Kviteseid (4028) |
| Map 1:50000: | Seljord (1613-4) | Map 1:250000: | Skien |
| Coordinate system: | EU89-UTM Zone 32 |
| East: | 472509 m. | North: | 6586685 m. |
| Longitude: | 8.5156140 | Latitude: | 59.4178830 |
| Show on map |
|
|
| 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 | |
| 1915 - 1916 | Pitting | ||
| 2006 - 2006 | Sampling | Company/Institution :NGU |
Mineralization |
| Era: | Proterozoic | Period: | Neoproterozoic | |
| Genesis: | Hydrothermal vein | Form: | Lens | |
| Main texture: | Fracture filling | Min. distribution: | Irregular (scattered) |
| Main grain size: | Fine grained (< 1 mm) | Main alteration: |
| Strike/Dip: | 40 / 70 | 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: | Vindeggen group | Formation: | Brunkeberg formation |
Mineralogy |
| Relationship | Mineral | Amount | |
| Gangue mineral | Quartz | Major mineral (>10%) | |
| Gangue mineral | Carbonate | Subordinate mineral (1-10%) | |
| Gangue mineral | Mica | Subordinate mineral (1-10%) | |
| Ore mineral | Bornite | Major mineral (>10%) | |
| Ore mineral | Chalcopyrite | Subordinate mineral (1-10%) |
Lithology: |
| Relationship | Rock | Origin | |
| Wall rock | Meta-arenite | Sedimentary Original rock :Arkosic sandstone |
|
| Metamorphic facies :Amphibolite |
Structures |
| Location: | Type: | Orientation(360 gr.): | Relation to min.: | |
| Wall rock | Mineral banding | Strike/Dip :268 / 32 | Pre-mineralisation ;...Effect :None |
Information(s) in free text format |
| Free text |
| En skogsbilvei kan følges øst for gården Groven fram til Tjørnstaultjørni. Det hersker noe forvirring om lokalisering av skjerpet. Dons (1963) nevner med forbehold en forekomst vest for tjernet, mens eieren av nedre Groven gård henviste til et skjerp sørøst for dette. En 15 m lang, 0,6-1 m bred og opptil 4-5 m høy dagskjæring er drevet på tvers av en markert, liten rygg som er orientert NØ-SV. Retningen på skjæringa er ca. 40º og kobbermineraliseringen kan best studeres i nedre del av denne. Ryggen består av rødlig gråhvit, båndet meta-arenitt med bånding 268º/32º. Den kuttes av 5-10 cm brede kvartsårer som fører bornitt og mindre mengder kobberkis. Årene opptrer stjert-om-stjert og har retning 40º/70º, parallelt en markert oppsprekking i meta-arenitten. Kobbermineralene er anriket i 10-15 cm store aggregater/klyser. Forekomsten har ubetydelig størrelse. |
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 | ||||
| TE0054.01 | Bedrock |
|
| NB! All analyse values are shown at the end of the printout.: |
Analyse Results |
| from |
| Deposit Area 4028 - 002 Tjørnstaul |
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# |
| TE0054.01 | Bedrock | 11450 | -100 | -100 | -10 | -10 | 36.0 | 170.0 |
| ------------------ |
| Sample No. | As* | Cd* | Mo* | Sb* | Bi* | Cr* | Mn* | Fe% | W* |
| TE0054.01 | -100 | -10.0 | -10.00 | -10 | 500 | -10 | 300 | .60 | -10 |
| ------------------ |
| Sample No. | Sr* | P* | Ca* | ||||||
| TE0054.01 | -10.0 | 0 | 0 |
| 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 |