Fact Sheet for <b>Deposit 0

					Norsk versjon
	THE ???? DATABASE
	Deposit 0 - 000 FEIL
	(Object Id: ) (Last updated: 07.12.2015)

Location

County:

Municipality:

Mangler ()

Map 1:50000:

Mo i Rana (1927-1)

Map 1:250000:

Mo i Rana

Coordinate system:

UTM-Zone 33 - EUREF89/WGS84

East:

451400 m.

North:

7357300 m.

Longitude:

13.9151750

Latitude:

66.3299810

Show on map

Resource

Resource Type:

Talc

Resource Subtype:

Talc (Soapstone)

Importance

Raw material meaning:

National Importance (reg. 20.02.2015)

Resources and production

	Activity:	Test mining	Reserves:	1040 thousand tons
	Operating method:	Open pit and underground mining	Historical production:

Products

Element/product Crude ore grade or quality Reg. date

Talc/carbonate 98 % 17.03.1994

Operations

From - To Activity Comments

1990 - 1992 Core drilling Company/Institution :Norwegian Talc

1990 - 1993 Geology Company/Institution :Norwegian Talc, NTH

1991 - 1991 Geophysics Company/Institution :NGU

Mineralization

Era: Paleozoic Period: Silurian

Genesis: Metasomatic Form: Lens

Main texture: Structureless Min. distribution: Massive (>50 % ore minerals)

Main grain size: Medium grained (1-3 mm)

Strike/Dip: 45 / 45 Direction: 45

Plunge: 45

Stratigraphic classification of host rock

Era: Paleozoic Period: Silurian

Province:

Geotec.unit:

Tectonic complex: Rødingsfjelldekkekom

Igneous complex:

Group: Formation:

Mineralogy

Mineral Amount

Talc Major mineral (>10%)

Magnesite Major mineral (>10%)

Magnetite Accessory mineral (<1%)

Chlorite Accessory mineral (<1%)

Structures

Location: Type: Orientation(360 gr.): Relation to min.:

Wall rock Foliation Strike/Dip :60 / 45 Syn-mineralisation ;...Effect :Modifies

Information(s) in free text format

Free text

Store Esjeklumpen is an 800 m long and up to 180 m thick exposed ultramafite situated approximately 3 km south-west of the present mine. The ultramafite is dominated by serpentinite, while talc-carbonate ore is exposed locally outside the serpentinite core. The occurrence of talc-carbonate ore was already known in the 1930's, when a small shaft was driven in the south-western part of the ultramafic body. In the years 1990-1991 two diamond core-drilling programs were established by Norwegian Talc Altermark AS (Edvin Rian) to investigate the size of the ore. The first program formed the basis of a civil engineer thesis by Holter (1990). The second program was included in a doctoral thesis by Karlsen (1995), but is otherwise reported in internal reports by E. Rian and T.A. Karlsen. 3720 m were drilled in the years 1990-1991. Although quite a lot of drill-core information is lacking, an estimated tonnage of around 2.5 mill. tonnes, including both proven, probable and possible resources, is a quite realistic estimate.

Bibliography:

From NGU's Reference Archive:

Søvegjarto, U.; Marker, M.; Graversen, O. , 1988

Mo i Rana. Berggrunnskart; Mo i Rana; 19271; 1:50 000; trykt i farger;

;Norges geologiske undersøkelse;KART

Karlsen, Tor Arne ; Rian, Edvin ; Olesen, Odleiv , 2000

Overwiew of talc resources in the Altermark talc province, northern Norway, and possible uses of the talc ore

;Norges geologiske undersøkelse;TIDSSKRIFTARTIKKEL;NGU Bulletin; No.436;93-102 pages

Abstract:

Active prospecting during the past 10 years has proved that the Altermark area contains much more talc than previously recognised in the Nakkan-Esjeklumpen area, 10 M tonnes or more of talc-carbonate ore are probably present, distributed in ultramafic bodies. The ore, which occurs as one of several layers within compositionally zoned ultramafic lenses dominated by antigorite serpentinites, has the following general mineralogy; talc (45-65%), carbonate (30-50%), chlorite (0-4%) and magnetite (0-3%). Relative to other known similar deposits, the ore is rather coarse-grained, and the minerals tend to be idio- blastic. Several products can be made from the talc-carbonate ore. By applying flotation or other kinds of mineral separation techniques, it is likely that high-quality talc-concentrate could be made in addition to calc-carbonate mixtures. a concentrate of by-product breunnerite would possibly be of ecomonic value.

	Element/product	Crude ore grade or quality	Reg. date
	Talc/carbonate	98 %	17.03.1994

From - To	Activity	Comments
1990 - 1992	Core drilling	Company/Institution :Norwegian Talc
1990 - 1993	Geology	Company/Institution :Norwegian Talc, NTH
1991 - 1991	Geophysics	Company/Institution :NGU

Era:	Paleozoic	Period:	Silurian
Genesis:	Metasomatic	Form:	Lens
Main texture:	Structureless	Min. distribution:	Massive (>50 % ore minerals)

	Province:
	Geotec.unit:
	Tectonic complex:	Rødingsfjelldekkekom
	Igneous complex:

	Mineral	Amount
	Talc	Major mineral (>10%)
	Magnesite	Major mineral (>10%)
	Magnetite	Accessory mineral (<1%)
	Chlorite	Accessory mineral (<1%)

	Location:	Type:	Orientation(360 gr.):	Relation to min.:
	Wall rock	Foliation	Strike/Dip :60 / 45	Syn-mineralisation ;...Effect :Modifies