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THE ORE DATABASE
Deposit Area 236 - 004
(Last updated 01.mar.2005)

Name of Deposit Area : Gamle Utsjøen gruve
(Object Id : 0236,004,00,00)

Location
County : Akershus (02) Municipality : Nes (Akershus) (0236)
Map 1:50000: Eidsvoll (1915-1) Map 1:250000: Hamar
Marking point: Longitude: 11.4147140 Latitude: 60.3369610
EU89-UTM Zone 32 (Coordinates IS confirmed)
X-coord: 633295 m. Y-coord: 6691380 m.

Commodity
Main Type: Precious metals (Au,Ag,PGE) Sub Type: Gold
Element(s): Au
Production
Activity: Mining Reserves:
Prod. method: Underground mining Production:
Prod. status: Disused, closed Volume of dump: 150 m3

Importance
Public: Little Importance (reg. 18.02.2015)
Economical: Minor interest , (Confirmed 27.jan.2005 by Havard Gautneb)

Mineralization
Era: Proterozoic Period: Neoproterozoic
Dating: Method:
Genesis: Hydrothermal vein Form: Plate
Main texture: Fracture filling Min. distribution: Irregular (scattered)
Main grain size: Medium grained (1-3 mm) Main alteration: Sericitisation
Strike/Dip: 3 / 90 Direction:
Plunge:
Stratigraphic classification of host rock
Era: Proterozoic Period: Paleoproterozoic
Province: East Norwegian Basement Province
Geotec.unit: Romerike Complex
Tectonic complex: Mylonite zone
Igneous complex:
Group: Formation:

Structures
Location: Type: Orientation(360 gr.): Relation to min.:
Host rock Fault plane Strike/Dip :3 / 90 Syn-mineralisation ;...Effect :Controls

Information(s) in free text format
Free text
Gamle Utsjøen mine was recently rediscovered by prospector Wilhelm Tveter who detected the entrance to a mine below the present water level in a small bay on the eastern shore of Lake Utsjøen. This is possibly the site where a 1-2 m wide nearly massive vein of sulphides was reported to have been found in 1787, and which according to old analyses cited by Bradt (1790) contained 255-320 g/t Au. However, all later attempts to find this deposit which was the most gold-rich in the whole Eidsvoll district, has failed. Several explanations for this have been given as discussed by Foslie (1924). But one reason could be that mine became flooded when the Lake Utsjøen dam was built in the 19ths century in order to float timber down the small stream during spring. The registered Utsjøen mine (AK0016) to the south is worked along a quartz vein poor in sulphides. The Gamle Utsjøen mine in the extension of a N-S trending system of milky quartz veins which is exposed in the hillside between Utsjøbråten and Utsjøen, and east of the dirt road on the eastern side of the lake. However, these 1-2 m thick veins contain only minor pyrite and chalcopyrite.


The fact sheet was created on 28.03.2024

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