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THE ORE DATABASE
Occurence 3035 - 003 Gullkis
(Object Id: 6490)
(Last updated: 02.10.2019)

Location
County: Viken Municipality: Eidsvoll (3035)
Map 1:50000: Eidsvoll (1915-1) Map 1:250000: Hamar
Coordinate system: EU89-UTM Zone 32
East: 630116 m. North: 6697074 m.
Longitude: 11.3608930 Latitude: 60.3890750
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Resource
Resource Type: Precious metals (Au,Ag,PGE) Resource Subtype: Gold
Element(s): Au
Importance
Raw material meaning: Not Assessed (reg. 18.02.2015)

Resources and production
Activity: Mining Reserves:
Operating method: Open pit and underground mining Historical production:


Mineralization
Era: Proterozoic Period: Neoproterozoic
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: 176 / 90 Direction:
Plunge:
Stratigraphic classification of host rock
Era: Proterozoic Period: Paleoproterozoic
Province: East Norwegian Basement Province
Geotec.unit: Solør Complex
Tectonic complex: Mylonite Zone
Igneous complex:
Group: Formation:

Mineralogy
Relationship Mineral Amount
Gangue mineral Quartz Major mineral (>10%)
Gangue mineral Sericite Subordinate mineral (1-10%)
Ore mineral Pyrite Major mineral (>10%)
Ore mineral Hematite Subordinate mineral (1-10%)
Ore mineral Gold Accessory mineral (<1%)

Structures
Location: Type: Orientation(360 gr.): Relation to min.:
Host rock Fault plane Strike/Dip :5 / 90 Syn-mineralisation ;...Effect :Controls
Host rock Foliation Strike/Dip :154 / 75 Pre-mineralisation ;...Effect :None

Information(s) in free text format
Free text
The Guldkis mine represents the discovery site for the first gold found in the Gullverket or Eidsvoll mining field. The mine was, like many in the Eidsvoll-Odal district, originally worked by Odal Copperworks during the period 1710-1740 (Falck-Muus 1924). In 1757 visible gold was found in one of the old workings in Guldkis mine and in the subsequent year a number of the abandoned copper mines were reopened for gold production (Bradt 1790, Keilhau 1836). During the whole mining period gold was extracted metallurgically from hand-cobbed pyritic ores and later from concentrates at Kongsberg in conjunction with the silver production. The total amount of gold that was produced is unknown. The mine is situated 100 m east of the Knofsløkka farm which represented the headquarter for the mining activity in the early years. Presently the mine comprise two water-filled shafts and one 15 m long adit situated at the western side and near the bottom of a small NNW-SSE-trending valley eroded out along a fault bifurcating from the major N-S trending Holsjøene fault zone shortly south of Røysivangen mine . A third shaft which have collapsed is situated 20 m west of the adit and adjacent to the dirt road leading to Lesja, Røysivangen, Fremmingvangen and Brustad mines. The workings is situated inside an up to 5 m wide vein of massive fine-grained milky quartz surrounded by brick-red clay-altered megacrystic gneiss granite. The steeply dipping vein strikes N5E, i.e. at an angle to the fault in the valley. At the entrance of the adit the main vein shows a NE-trending and 2 m wide branch. The exposed parts of the veins contain no visible sulphides with the exception of accessory pyrite and chalcopyrite occurring locally in the gneisses along the vein contact and in occasional fragments of sericite-altered gneisses in the vein, e.g. at the bottom of the adit. However, according to descriptions by Bradt (1790) and Keilhau (1836), as well as maps in Bradt (1790) the southern and northern shaft in the valley was driven along several thin (10-20 cm wide) auriferous sulphide-rich veins down to depths of about 20 m and 35 m, respectively. The auriferous veins, which extends for about 30 m carry locally visible gold. The cross-cut the main quartz vein in an E-W direction. The gold mineralisation in the Guldkis mine is typical for the deposits in the Eidsvoll mining field, being characterised by gold-enrichment only in association with pyrite-bearing parts of the quartz veins.

Bibliography:
From NGU's Reference Archive:
Keilhau
Om Eidsvoll Guldverk.
;Norges geologiske undersøkelse;FAGRAPPORT;Bergarkivet; No.BA 1433;8 pages
Abstract:
Rapporten handler om Græsli grubene, Guldkisgruven, Sondergruvene og skjerp no. 4. Rapporten omhandler tidligere drift, forekomtenes opptreden og geologi. Rapporten er skrevet for hånd.

Brandt, Ivar , 1940
Skriv til Reichskommisariat, Wirtschaftsabt., Berg, Grube und Bodenforschung, Oslo angående Eidsvoll gullverk.
;Norges geologiske undersøkelse;FAGRAPPORT;Bergarkivet; No.BA 3604;2 pages
Abstract:
Jeg er klar over at gullet muligens har utspilt sin rolle som betalinsmiddel, men at det for tiden også er et stort udekket behov til teknisk bruk. Gruvene ved Eidsvoll formodes å inneholde mellom 10 og 15 g. gull pr. tonn og skulle derfor være drivverdige. Gruvene er ifølge Kelhau (1936) h.h.v. 62 og ca. 20 m. dype med flere mindre stoller på hovedgangene. Gangbredden er 4 - 6 m. Bergarten er rødkvarts. Det finnes 5 mindre gruver i den nærmeste omegn. I en sandprøve anslo jeg gullinnholdet til 1 - 2 g. pr. tonn. Kjemiske analyser viser spor av edle metaller. Rent gull vil med grunnvann og regn forskyve seg nedover og befinne seg i de undre gruslag i betydelig større mengde enn i overflaten.

Ihlen, Peter M. , 1983
Befaringer av malmforekomster i Eidsvoll og Nord-Odal kommuner 1983
;Norsk Hydro / NGU;RAPPORT;NH-arkivet; No.NH 6B;18+bilag pages
Abstract:
Rapporten beskriver de forskjellige hovedtyper av malmer og mineraliseringer i Eidsvoll og Nord-Odal kommuner som ble befart. Befarte gruver: Brustad, Sander, Guldkis, Antoinette, Storgruven, Trøft-gruven og Føskersetergruven.

References not to be found in NGU's Reference Archive.:
Bradt, D. E. (1790) «Om guldværket i Eidsvold i Norge 1781, med tillæg om hvad derved til 1789 aars udgang videre er foretaget», Minerva, København. Faksimile 1967. https://www.nb.no/items/2c817a6c8348733c7be3d8fe03d62e4b


Keilhau, B. M. (1836) «Om det forrige Guldverk i Eidsvold» Magazin for Naturvidenskaberne. Andet bind. Den physiographiske Forening i Christiania. Johan Dahl (redaktør).


The fact sheet was created on 26.10.2021

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