Norsk versjon
	THE ORE DATABASE
	Deposit Area 1833 - 029
	(Last updated 25.feb.2005)

Importance

Public:

Not Assessed (reg. 18.02.2015)

Economical:

Not classified/evaluated , (Confirmed 25.feb.2005 by Agnes Raaness)

Products

	Element/product	Crude ore grade or quality
	FE_MAG	ca.12 %
	FE_SIL	ca. 7 %
	P	ca.0.5 %
	S	ca.0.3 %

Operations

	From - To	Activity	Comments
	1970 - 1970	Geology	Company/Institution :Rana Gruber (Søvegjarto M 1:5000)

Mineralization

	Era:	Proterozoic	Period:	Neoproterozoic
	Dating:		Method:
	Genesis:	Sedex	Form:	Layer
	Main texture:	Banded	Min. distribution:	Irregular (scattered)

Main grain size:

Fine grained (< 1 mm)

Main alteration:

	Strike/Dip:	30 / 80	Direction:	30
			Plunge:	15

Stratigraphic classification of host rock

Era:

Proterozoic

Period:

Neoproterozoic

	Province:	Caledonides
	Geotec.unit:	Rødingsfjell Nappe Complex
	Tectonic complex:	Ramnålidekket
	Igneous complex:

Group:

Ørtfjellgruppen

Formation:

Dunderlandformasjonen

Mineralogy

	Relationship	Mineral	Amount
	Gangue mineral	Amphibole	Major mineral (>10%)
	Gangue mineral	Quartz	Major mineral (>10%)
	Gangue mineral	Oligoclase	Subordinate mineral (1-10%)
	Gangue mineral	Biotite	Subordinate mineral (1-10%)
	Gangue mineral	Chlorite	Subordinate mineral (1-10%)
	Gangue mineral	Carbonate	Subordinate mineral (1-10%)
	Ore mineral	Magnetite	Major mineral (>10%)
	Ore mineral	Apatite	Subordinate mineral (1-10%)
	Ore mineral	Pyrite	Accessory mineral (<1%)

Lithology:

	Relationship	Rock	Origin
	Host rock	Amfibolitt	Extrusive Original rock :Basalt
			Metamorphic facies :Amphibolite
	Wall rock	Kalkspatmarmor	Sedimentary Original rock :Limestone
			Metamorphic facies :Amphibolite
	Wall rock	Karb.gl.skifer	Sedimentary Original rock :Argillaceous sediment
			Metamorphic facies :Amphibolite

Structures

	Location:	Type:	Orientation(360 gr.):	Relation to min.:
	Host rock	Primary layering	Strike/Dip :30 / 15	Syn-mineralisation ;...Effect :None
	Host rock	Foliation	Strike/Dip :30 / 80	Syn-mineralisation ;...Effect :None

Information(s) in free text format

Free text

Forekomsten består av en vel 1,6 km lang mt.-mineralisering med bakkeutslag på 9000-16000 gamma. Den kan oppfattes som en nordlig utløper av Lasken-feltet 4 km lenger SSV. Søndre Dunderland øvre-draget (335-435 moh.) ligger 1,1 km øst og sørøst for Søndre Dunderland nedre-draget (140-175 moh.). Det er gått 10 bakkemagnetometriske profiler i draget som domineers av magnetittimpregnert amfibolitt. Mektigheten på mineraliserigen i profilene varierer mellom 15 og 50m.

Bibliography:

From NGU's Reference Archive:

Søvegjarto, Ulrik , 1972

	Berggrunngeologiske Undersøkelser i Dunderlandsdalen, Nordland.

;UiO Geologisk fellesråd;AVHANDLING

Name of Locality : Mobekken

(Object Id : 1833,029,01,00)

---

Location

County :

Nordland (18)

Municipality :

Rana (1833)

Map 1:50000:

Storforshei (2027-4)

Map 1:250000:

Mo i Rana

Marking point:

Longitude:

14.8382300

Latitude:

66.4340140

EU89-UTM Zone 33

(Coordinates IS confirmed)

X-coord:

492782 m.

Y-coord:

7368297 m.

Commodity

	Main Type:	Ferrous metals(Fe, Mn, Ti)	Sub Type:	Iron
			Element(s):	Fe P

Production

	Activity:	Exploration	Reserves:
	Prod. method:		Production:
	Prod. status:		Volume of dump:

Information(s) in free text format

Description

50 m mektig magnetometeranomali.

Name of Locality : 320m S. f. Mobekken

(Object Id : 1833,029,02,00)

---

Location

County :

Nordland (18)

Municipality :

Rana (1833)

Map 1:50000:

Storforshei (2027-4)

Map 1:250000:

Mo i Rana

Marking point:

Longitude:

14.8360040

Latitude:

66.4317700

EU89-UTM Zone 33

(Coordinates IS confirmed)

X-coord:

492682 m.

Y-coord:

7368047 m.

Commodity

	Main Type:	Ferrous metals(Fe, Mn, Ti)	Sub Type:	Iron
			Element(s):	Fe P

Production

	Activity:	Exploration	Reserves:
	Prod. method:		Production:
	Prod. status:		Volume of dump:

Information(s) in free text format

Description

25 m mektig magnetometeranomali.

Name of Locality : Innerbekken

(Object Id : 1833,029,03,00)

---

Location

County :

Nordland (18)

Municipality :

Rana (1833)

Map 1:50000:

Storforshei (2027-4)

Map 1:250000:

Mo i Rana

Marking point:

Longitude:

14.8337800

Latitude:

66.4290760

EU89-UTM Zone 33

(Coordinates IS confirmed)

X-coord:

492582 m.

Y-coord:

7367747 m.

Commodity

	Main Type:	Ferrous metals(Fe, Mn, Ti)	Sub Type:	Iron
			Element(s):	Fe P

Production

	Activity:	Exploration	Reserves:
	Prod. method:		Production:
	Prod. status:		Volume of dump:

Information(s) in free text format

Description

20-40 m mektig magnetometeranomali.

Name of Locality : 340m SV Mellombekken

(Object Id : 1833,029,04,00)

---

Location

County :

Nordland (18)

Municipality :

Rana (1833)

Map 1:50000:

Storforshei (2027-4)

Map 1:250000:

Mo i Rana

Marking point:

Longitude:

14.8270850

Latitude:

66.4250320

EU89-UTM Zone 33

(Coordinates IS confirmed)

X-coord:

492282 m.

Y-coord:

7367297 m.

Commodity

	Main Type:	Ferrous metals(Fe, Mn, Ti)	Sub Type:	Iron
			Element(s):	Fe P

Production

	Activity:	Exploration	Reserves:
	Prod. method:		Production:
	Prod. status:		Volume of dump:

Information(s) in free text format

Description

15 m mektig magnetometeranomali.

Name of Locality : 800m SSV Mellombekken

(Object Id : 1833,029,05,00)

---

Location

County :

Nordland (18)

Municipality :

Rana (1833)

Map 1:50000:

Storforshei (2027-4)

Map 1:250000:

Mo i Rana

Marking point:

Longitude:

14.8226320

Latitude:

66.4209890

EU89-UTM Zone 33

(Coordinates IS confirmed)

X-coord:

492082 m.

Y-coord:

7366847 m.

Commodity

	Main Type:	Ferrous metals(Fe, Mn, Ti)	Sub Type:	Iron
			Element(s):	Fe P

Production

	Activity:	Exploration	Reserves:
	Prod. method:		Production:
	Prod. status:		Volume of dump:

Information(s) in free text format

Description

15 m mektig magnetometeranomali.

---

The fact sheet was created on 22.11.2024

Questions or comments regarding the fact sheet can be emailed to: ressursdatabaser@ngu.no

Copyright © 2024 Geological Survey of Norway