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	Occurence 0 - 000 FEIL
	(Object Id: ) (Last updated: 01.03.2005)

Mineralization

	Era:	Proterozoic	Period:	Neoproterozoic
	Dating:	776 (-8\+8) million year	Method:	K/Ar
	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:	276 / 75	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:

Mineralogy

	Relationship	Mineral	Amount
	Gangue mineral	Quartz	Major mineral (>10%)
	Gangue mineral	Calcite	Subordinate mineral (1-10%)
	Gangue mineral	Sericite	Subordinate mineral (1-10%)
	Ore mineral	Pyrite	Major mineral (>10%)
	Ore mineral	Chalcopyrite	Major mineral (>10%)
	Ore mineral	Gold	Accessory mineral (<1%)
	Ore mineral	Galena	Accessory mineral (<1%)
	Ore mineral	Sphalerite	Accessory mineral (<1%)
	Ore mineral	Hematite	Accessory mineral (<1%)
	Ore mineral	Magnetite	Accessory mineral (<1%)
	Ore mineral	Bornite	Accessory mineral (<1%)
	Ore mineral	Pyrrhotite	Accessory mineral (<1%)

Structures

	Location:	Type:	Orientation(360 gr.):	Relation to min.:
	Host rock	Joints/Fractures	Strike/Dip :266 / 80	Syn-mineralisation ;...Effect :Controls
	Host rock	Joints/Fractures	Strike/Dip :293 / 70	Syn-mineralisation ;...Effect :Controls
	Host rock	Foliation	Strike/Dip :317 / 60	Pre-mineralisation ;...Effect :None
	Host rock	Foliation	Strike/Dip :344 / 45	Pre-mineralisation ;...Effect :None

Information(s) in free text format

Free text

The mine is situated at the top of the steep western hill side immediately north of Steinbekk farm east of Vorma river. The mine was worked along a meter wide quartz vein cutting reddish and greyish coarse-grained migmatitic biotite gneisses of the Paleoproterozoic Romerike Gneiss Complex. The main vein which can be followed over a distance of 260 m, is only sulphide-bearing in its western and eastern part. Mining in its western part occurred in a now 42 m long, 15-20 m deep and 3-5 m wide open pit which at the bottom is connected with an adit starting at the bottom of the steep hillside towards the west, where the vein pinches out. The pit is not accessible, since the adit is closed by a dam, representing a water reservoir for the local people. Mining started originally in the Old Sander mine representing a deep, now water-filled, shaft that was sunk on a sulphide-bearing segment of the vein about 200 m east of the open pit. Between these two mining sites trenches has been dug through the overburden along the vein, but no ore has apparently been found. The vein is developed along a system of steep northerly dipping fractures with strike direction between N85E and N110E. Immidiately east of the shaft the strike direction of the vein shifts to southeasterly, i.e. N150-160E or roughly parallel to the foliation of the gneisses. The 0,5-1,5 m wide quartz vein consists of massiv milky quartz that locally shows comb and cockade structure with crystal interstices partly filled with calcite and/or pyrite-chalcopyrite aggregates. It is enveloped by a 0,5 m wide zone of altered wall rocks that includes variable intensity of silicification, quartz-sericite- and chlorite-alteration, as well as carbonatisation. The ore mineralisation is mainly developed along the margin of the vein in the silicified and sericite-altered gneisses which carry erratic concentrations of disseminated pyrite and quartz-sulphide veins with pyrite, chalcopyrite and sub-ordinate galena. Microscopic examinations reveal the presence of carrolite, native gold and hematite as additional constituents. Native gold occurs as tiny droplets along microfractures in pyrite and as intergrowth with chalcopyrite and galena which replace pyrite along microfractures. The gold contents of the sulphide ores reach a maximum of 2,9 g/t. The eastern vein sub-concordant with the gneiss foliation is totally devoid of sulphides and associated wall-rock alteration.

Name of Locality: Hoel gruve

(Object Id: 15838 2,01,00)

Location

County:

Municipality:

Mangler ()

Map 1:50000:

Eidsvoll (1915-1)

Map 1:250000:

Hamar

Coordinate system:

UTM-Zone 33 - EUREF89/WGS84

East:

626225 m.

North:

6693872 m.

Longitude:

11.2883260

Latitude:

60.3615810

Show on map

Resource

	Resource Type:	Precious metals (Au,Ag,PGE)	Resource Subtype:	Gold
			Element(s):	Au Fe-sulphides Cu

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 :270 / 80

Name of Locality: Steinbekken skjerp

(Object Id: 15839 2,02,00)

Location

County:

Municipality:

Mangler ()

Map 1:50000:

Eidsvoll (1915-1)

Map 1:250000:

Hamar

Coordinate system:

UTM-Zone 33 - EUREF89/WGS84

East:

626242 m.

North:

6693832 m.

Longitude:

11.2886090

Latitude:

60.3612170

Show on map

Resource

	Resource Type:	Precious metals (Au,Ag,PGE)	Resource Subtype:	Gold
			Element(s):	Au Fe-sulphides

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 :322 / 70

Name of Locality: Sanderhaugen stoll

(Object Id: 15841 2,03,00)

Location

County:

Municipality:

Mangler ()

Map 1:50000:

Eidsvoll (1915-1)

Map 1:250000:

Hamar

Coordinate system:

UTM-Zone 33 - EUREF89/WGS84

East:

625971 m.

North:

6693865 m.

Longitude:

11.2837210

Latitude:

60.3615970

Show on map

Resource

	Resource Type:	Precious metals (Au,Ag,PGE)	Resource Subtype:	Gold
			Element(s):	Fe-sulphides Cu

Resources and production

	Activity:	Test mining	Reserves:
	Operating method:	Underground mining	Historical production:

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The fact sheet was created on 25.04.2024

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