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Occurence 3303 - 027 Samuel gruve
(Object Id: 6073)
(Last updated: 29.04.2015)
Belongs to the Province: Underberget

Location
County: Buskerud Municipality: Kongsberg (3303)
Map 1:50000: Kongsberg (1714-2) Map 1:250000: Skien
Coordinate system: EU89-UTM Zone 32
East: 534591 m. North: 6613441 m.
Longitude: 9.6138500 Latitude: 59.6576140
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Resource
Resource Type: Precious metals (Au,Ag,PGE) Resource Subtype: Silver
Element(s): Ag
Importance
Raw material meaning: Little Importance (reg. 18.02.2015)
Historical: Yes , (Confirmed 29.apr.2015 by Terje Bjerkgård)

Resources and production
Activity: Mining Reserves:
Operating method: Underground mining Historical production: 520 thousand tons


Products
Element/product Crude ore grade or quality Reg. date
Ag 193 ppm 29.04.2015

Operations
From - To Activity Comments
1630 - 1805 Regular production Company/Institution :Kongsberg Sølvverk
1889 - 1934 Regular production Company/Institution :Kongsberg Sølvverk

Mineralization
Era: Paleozoic Period: Permian
Genesis: Hydrothermal vein Form: Irregular
Main texture: Fracture filling Min. distribution: Irregular (scattered)
Main grain size: Very unevenly grained Main alteration:
Strike/Dip: 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:

Information(s) in free text format
Free text
The Kongsberg Silver mines were in operation from 1624 to 1957. During the 333 years of mining about 1,350 t of Ag metal was produced from about 130 larger and smaller mines. The annual production was between 2 and 10 tons. Most silver was produced from mines along the socalled Overberget fahlband zone, of which the Kongens Mine alone produced 601 t. The Kongens mine was also the largest and deepest of the silver mines, reaching a depth of more than 1000 m. The mines were worked on silver-bearing calcite veins, and the ore shoots were mainly controlled by the intersection of the veins with sulphide-bearing horizons within the Mesoproterozoic gneisses. These so-called fahlbands (Bugge 1917) are generally rusty, very schistose mica rich schists and gneisses, which are concordant with the country rocks. The rust is due to the weathering of sulphides, mainly pyrite and pyrrhotite, but also subordinate to accessory chalcopyrite, sphalerite, galena, arsenopyrite and cobalt-bearing minerals. The most important of these horizons are the Overberget and Underberget fahlbands, located to the west of Kongsberg and striking north-south. The great majority of the richest silver mines are related to these two zones. The Overberget fahlband is 180-900 m wide and has a length of more than 10 km along strike. Samuel mine (gruve) was found in 1630 and first mined until 1805. A second mining period lasted from 1889 until 1934. The adit connecting Overberget and Underberget mine fields was finished in 1922. Samuel mine was one of the largest mines in the Kongsberg district and produced ca. 100 000 kg pure silver. The depth of the mine is 665 m.

Bibliography:
From NGU's Reference Archive:
Bugge, Arne , 1930
Rapport over Kongsberg Sølvverks Gruber. Overberget og underberget.
;Norges geologiske undersøkelse;FAGRAPPORT;Bergarkivet; No.BA 3244;213 pages
Abstract:
Utredningen om tahlbåndene og gangene i Kongsbergfeltet og om gruvene på Underberget og Overberget er basert på Sølverkets gamle og nye litteratur, de foreliggende geologiske detaljkarter og de som undertegnede utarbeidet i tiden 1921 - 1929. I beskrivelsen av gruvene har undertegnede forsøkt å gi en oversikt over hver enkelt gruves historie, verdi og fremtidsmuligheter.

Name of Locality: 1
(Object Id: 19684 27,01,00)

Location
County: Buskerud Municipality: Kongsberg (3303)
Map 1:50000: Kongsberg (1714-2) Map 1:250000: Skien
Coordinate system: EU89-UTM Zone 32
East: 534664 m. North: 6613352 m.
Longitude: 9.6151300 Latitude: 59.6568100
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Resource
Resource Type: Precious metals (Au,Ag,PGE) Resource Subtype: Silver
Element(s): Ag


Name of Locality: 2
(Object Id: 19685 27,02,00)

Location
County: Buskerud Municipality: Kongsberg (3303)
Map 1:50000: Kongsberg (1714-2) Map 1:250000: Skien
Coordinate system: EU89-UTM Zone 32
East: 534596 m. North: 6613355 m.
Longitude: 9.6139210 Latitude: 59.6568460
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Resource
Resource Type: Precious metals (Au,Ag,PGE) Resource Subtype: Silver
Element(s): Ag


Name of Locality: 3
(Object Id: 19686 27,03,00)

Location
County: Buskerud Municipality: Kongsberg (3303)
Map 1:50000: Kongsberg (1714-2) Map 1:250000: Skien
Coordinate system: EU89-UTM Zone 32
East: 534582 m. North: 6613465 m.
Longitude: 9.6136820 Latitude: 59.6578320
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Resource
Resource Type: Precious metals (Au,Ag,PGE) Resource Subtype: Silver
Element(s): Ag


Name of Locality: Sofie Hedvig
(Object Id: 19687 27,04,00)

Location
County: Buskerud Municipality: Kongsberg (3303)
Map 1:50000: Kongsberg (1714-2) Map 1:250000: Skien
Coordinate system: EU89-UTM Zone 32
East: 534572 m. North: 6613515 m.
Longitude: 9.6135180 Latitude: 59.6582820
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Resource
Resource Type: Precious metals (Au,Ag,PGE) Resource Subtype: Silver
Element(s): Ag


The fact sheet was created on 18.04.2024

Questions or comments regarding the fact sheet can be emailed to:
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