|
Norsk versjon | ||||
| THE ORE DATABASE | |||||
| Deposit Area 624 - 072 | |||||
| (Last updated 12.aug.2010) | |||||
Name of Deposit Area : Løkka |
| (Object Id : 0624,072,00,00) |
| Location |
| County : | Buskerud (06) | Municipality : | Øvre Eiker (0624) |
| Map 1:50000: | Kongsberg (1714-2) | Map 1:250000: | Skien |
| Marking point: | Longitude: | 9.7051850 | Latitude: | 59.6946340 |
| EU89-UTM Zone 32 | (Coordinates IS confirmed) |
| X-coord: | 539695 m. | Y-coord: | 6617614 m. |
|
|
| Commodity |
| Main Type: | Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) | Sub Type: | Lead | |
| Element(s): | Kis Pb Zn |
| Production |
| Activity: | Pitting | Reserves: | ||
| Prod. method: | Production: | |||
| Prod. status: | Volume of dump: |
| Importance |
| Public: | Not Assessed (reg. 18.02.2015) |
| Economical: | Not classified/evaluated |
Mineralization |
| Era: | Paleozoic | Period: | Permian | |
| Dating: | Method: | |||
| Genesis: | Hydrothermal vein | Form: | Lens | |
| Main texture: | Vein network | Min. distribution: | Irregular (scattered) |
| Main grain size: | Very unevenly grained | Main alteration: |
| Strike/Dip: | 46 / 90 | Direction: | ||
| Plunge: |
| Stratigraphic classification of host rock |
| Era: | Proterozoic | Period: | Mesoproterozoic |
| Province: | South Norwegian Basement Province | |
| Geotec.unit: | Kongsberg Complex | |
| Tectonic complex: | ||
| Igneous complex: |
| Group: | Formation: |
Mineralogy |
| Relationship | Mineral | Amount | |
| Gangue mineral | Quartz | Major mineral (>10%) | |
| Gangue mineral | Carbon | Subordinate mineral (1-10%) | |
| Ore mineral | Pyrite | Major mineral (>10%) | |
| Ore mineral | Chalcopyrite | Accessory mineral (<1%) | |
| Ore mineral | Sphalerite | Accessory mineral (<1%) |
Lithology: |
| Relationship | Rock | Origin | |
| Wall rock | Tonalitic gneiss |
Structures |
| Location: | Type: | Orientation(360 gr.): | Relation to min.: | |
| Host rock | Hydrothermal vein | Strike/Dip :46 / 90 | Syn-mineralisation ;...Effect :Controls | |
| Wall rock | Foliation | Strike/Dip :198 / 85 | Pre-mineralisation ;...Effect :None |
Information(s) in free text format |
| Free text |
| Løkka forekomsten består av en større grop/strosse og en liten synk ca. 275 m mot nord. Hovedforekomsten er en 13 m lang, inntil 5 m bred og 1.5 m dyp grop som i stor grad er fylt med kvist og overgrodd. Dypeste del er i nordenden. Gropen ha retning NØ-SV (050 grader). 6 m mot nord er den en liten gjengrodd røsk. Lengst nord i hovegropa er det blottlagt en 1.5 m bred kvartsgang som dels er massiv og dels har kamstruktur. Det er enkelte kullblenderike soner. Det er også en 5 cm sone med rik pyrittimpregnasjon og med litt kobberkis. Det er ellers vanskelig å finne materiale på den overgrodde tipphaugen, men det er noen blokker med båndet kullblende-kvarts, dels breksjestruktur. Noe pyritt sees assosiert med kvarts. |
Fieldsamples |
| Sample No. | Sample type | Miscellanrous | ||||
| BU0351.02 | Dump |
|
| NB! All analyse values are shown at the end of the printout.: |
Name of Locality : Synk |
| (Object Id : 0624,072,01,00) |
| Location |
| County : | Buskerud (06) | Municipality : | Øvre Eiker (0624) |
| Map 1:50000: | Kongsberg (1714-2) | Map 1:250000: | Skien |
| Marking point: | Longitude: | 9.7068330 | Latitude: | 59.6969690 |
| EU89-UTM Zone 32 | (Coordinates IS confirmed) |
| X-coord: | 539785 m. | Y-coord: | 6617875 m. |
|
|
| Commodity |
| Main Type: | Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) | Sub Type: | Lead | |
| Element(s): | Kis Pb Zn |
| Production |
| Activity: | Pitting | Reserves: | ||
| Prod. method: | Production: | |||
| Prod. status: | Volume of dump: | 20 m3 |
Mineralogy |
| Relationship | Mineral | Amount | |
| Gangue mineral | Quartz | Major mineral (>10%) | |
| Gangue mineral | Carbon | Subordinate mineral (1-10%) | |
| Gangue mineral | Calcite | Subordinate mineral (1-10%) | |
| Ore mineral | Pyrite | Major mineral (>10%) | |
| Ore mineral | Sphalerite | Major mineral (>10%) | |
| Ore mineral | Chalcopyrite | Accessory mineral (<1%) | |
| Ore mineral | Galena | Accessory mineral (<1%) |
Lithology: |
| Relationship | Rock | Origin | |
| Wall rock | Tonalitic gneiss |
Structures |
| Location: | Type: | Orientation(360 gr.): | Relation to min.: | |
| Host rock | Hydrothermal vein | Strike/Dip :107 / 90 | Syn-mineralisation ;...Effect :Controls | |
| Wall rock | Foliation | Strike/Dip :180 / 90 | Pre-mineralisation ;...Effect :None |
Information(s) in free text format |
| Free text |
| Vannfylt synk 1.5x1.5 m i omriss. Synken ligger like ved turstien opp fra Løkka. Det er drevet på en kvartsgang som er ca. 1 m mektig i retning øst-vest (107/90). Mineralisering består av tynne striper (<1-2 cm) med sinkblende og pyritt, aksessorisk til underordnet kobebrkis og aksessorisk blyglans i kvarts. Det er breksjestruktur med fragmenter av kullblende, også noe kalkspat. |
Fieldsamples |
| Sample No. | Sample type | Miscellanrous | ||||
| BU0351.01 | Dump |
|
| NB! All analyse values are shown at the end of the printout.: |
Analyse Results |
| from |
| Deposit Area 624 - 072 Løkka |
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# |
| BU0351.01 | Dump | 2300 | 40900 | 310 | 44 | 7 | 15.0 | 350.0 |
| BU0351.02 | Dump | 1810 | 1580 | 510 | 46 | 13 | 17.0 | 149.0 |
| ------------------ |
| Sample No. | As* | Ba* | Mo* | Sb* | Bi* | S% | Fe% | ||
| BU0351.01 | 1150 | 1230 | -5.00 | 10 | 10 | 9.01 | 7.59 | ||
| BU0351.02 | 370 | 130 | -5.00 | -10 | 10 | 5.19 | 5.45 |
| The fact sheet was created on 16.02.2026 |
| Questions or comments regarding the fact sheet can be emailed to: ressursdatabaser@ngu.no |
| Copyright © 2026 Geological Survey of Norway |