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Occurence 0 - 000 FEIL
(Object Id: )
(Last updated: 01.03.2005)
Location
County: Municipality: Mangler ()
Map 1:50000: Eidsvoll (1915-1) Map 1:250000: Hamar
Coordinate system: UTM-Zone 33 - EUREF89/WGS84
East: 632129 m. North: 6695876 m.
Longitude: 11.3965720 Latitude: 60.3776760
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Resource
Resource Type: Precious metals (Au,Ag,PGE) Resource Subtype: Gold
Element(s): Au Cu
Importance
Raw material meaning: Little Importance (reg. 18.02.2015)


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: 104 / 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 Potassic feldspar Subordinate mineral (1-10%)
Gangue mineral Sericite Subordinate mineral (1-10%)
Ore mineral Pyrite Major mineral (>10%)
Ore mineral Chalcopyrite Subordinate mineral (1-10%)
Ore mineral Gold Accessory mineral (<1%)
Ore mineral Hematite Accessory mineral (<1%)
Ore mineral Carrollite Accessory mineral (<1%)
Ore mineral Galena Accessory mineral (<1%)

Structures
Location: Type: Orientation(360 gr.): Relation to min.:
Host rock Joints/Fractures Strike/Dip :68 / 90 Syn-mineralisation ;...Effect :Controls
Host rock Fault plane Strike/Dip :77 / 90 Syn-mineralisation ;...Effect :Controls
Host rock Fault plane Strike/Dip :90 / 90 Syn-mineralisation ;...Effect :Controls
Host rock Fault plane Strike/Dip :97 / 90 Syn-mineralisation ;...Effect :Controls
Host rock Fault plane Strike/Dip :104 / 90 Syn-mineralisation ;...Effect :Controls
Host rock Foliation Strike/Dip :135 / 90 Pre-mineralisation
Host rock Shear plane Strike/Dip :155 / 75 Pre-mineralisation ;...Effect :None
Host rock Shear plane Strike/Dip :335 / 80 Pre-mineralisation ;...Effect :None

Information(s) in free text format
Free text
The Græsli mine and prospects is situated shortly west of Lake Larsputten where they occur along a 3-8 m thick and steeply-dipping quartz vein following a topographic depression over a distance of 300 m. The mines and prospects are numbered consecutively from no. 1 (Græsli mine) in the east to no. 5 in the west, where the vein bifurcates into a number of thin veins before the veins die out. The main mine comprises a more than 5 m deep shaft measuring 4 m x 8 m in cross-section. The water-filled pit at no. 5 is of comparable size, whereas the others are much smaller. The vein consists of coarsely crystalline milky quartz and is usually enveloped by 0,2-0.5 m wide zones of sericite-altered host-rocks, comprising mostly coarse-grained and megacrystic gneiss granites of the Solør Complex. The formation of the somewhat crescent-shaped vein was controlled by three interconnected systems of fractures striking NE-SW, ENE-WSW and ESE-WNW. Detailed bedrock-mapping by P. M. Ihlen has revealed the presence of a ENE-WSW-striking normal fault along the topographical depression. The fault follows the southern contact of the vein east of prospect no. 5 where the vein becomes brecciated and cemented by early amorphous carbon and late red K-feldspar. The vein is poorly mineralised and only major concentrations of sulphides are only found in pit no. 1 and no. 5. The sulphides comprising pyrite and chalcopyrite, fill interstices between quartz and K-feldspar crystals as well as fractures, partly together with amorphous carbon and K-feldspar. Microscopic examinations of sulphide samples from the Græsli mine reveal the presence of 10-50 mm grains of native gold intergrown with quartz and chalcopyrite, the latter often filling micro-fractures in pyrite. Analyses of the ores yield up to 2.3 g/t Au.

Name of Locality: Skjerp no. 2
(Object Id: 15842 1,01,00)
Location
County: Municipality: Mangler ()
Map 1:50000: Eidsvoll (1915-1) Map 1:250000: Hamar
Coordinate system: UTM-Zone 33 - EUREF89/WGS84
East: 632096 m. North: 6695865 m.
Longitude: 11.3959670 Latitude: 60.3775880
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Resource
Resource Type: Precious metals (Au,Ag,PGE) Resource Subtype: Gold
Element(s): Au Kis
Resources and production
Activity: Test mining Reserves:
Operating method: Open pit mining Historical production:


Structures
Location: Type: Orientation(360 gr.): Relation to min.:
Host rock Hydrothermal vein Strike/Dip :97 / 90

Name of Locality: Skjerp no.3
(Object Id: 15843 1,02,00)
Location
County: Municipality: Mangler ()
Map 1:50000: Eidsvoll (1915-1) Map 1:250000: Hamar
Coordinate system: UTM-Zone 33 - EUREF89/WGS84
East: 631941 m. North: 6695791 m.
Longitude: 11.3931100 Latitude: 60.3769750
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Resource
Resource Type: Precious metals (Au,Ag,PGE) Resource Subtype: Gold
Element(s): Au Kis
Resources and production
Activity: Test mining Reserves:
Operating method: Open pit mining Historical production:


Structures
Location: Type: Orientation(360 gr.): Relation to min.:
Host rock Hydrothermal vein Strike/Dip :77 / 90

Name of Locality: Skjerp no. 4
(Object Id: 15844 1,03,00)
Location
County: Municipality: Mangler ()
Map 1:50000: Eidsvoll (1915-1) Map 1:250000: Hamar
Coordinate system: UTM-Zone 33 - EUREF89/WGS84
East: 631892 m. North: 6695765 m.
Longitude: 11.3922050 Latitude: 60.3767570
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Resource
Resource Type: Precious metals (Au,Ag,PGE) Resource Subtype: Gold
Element(s): Au Kis
Resources and production
Activity: Test mining Reserves:
Operating method: Open pit mining Historical production:


Structures
Location: Type: Orientation(360 gr.): Relation to min.:
Host rock Hydrothermal vein Strike/Dip :90 / 90

Name of Locality: Skjerp no. 5
(Object Id: 15845 1,04,00)
Location
County: Municipality: Mangler ()
Map 1:50000: Eidsvoll (1915-1) Map 1:250000: Hamar
Coordinate system: UTM-Zone 33 - EUREF89/WGS84
East: 631853 m. North: 6695729 m.
Longitude: 11.3914750 Latitude: 60.3764470
Show on map
Resource
Resource Type: Precious metals (Au,Ag,PGE) Resource Subtype: Gold
Element(s): Au Kis
Resources and production
Activity: Mining Reserves:
Operating method: Open pit mining Historical production:


Structures
Location: Type: Orientation(360 gr.): Relation to min.:
Host rock Hydrothermal vein Strike/Dip :57 / 90

The fact sheet was created on 18.04.2024
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