Fact Sheet for <b>Occurence 5035 - 026 Kjerringmyra</b>

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	THE ORE DATABASE
	Occurence 5035 - 026 Kjerringmyra
	(Object Id: 201) (Last updated: 16.02.2005)

Location

County:

Trøndelag

Municipality:

Stjørdal (5035)

Map 1:50000:

Stjørdal (1621-1)

Map 1:250000:

Trondheim

Coordinate system:

EU89-UTM Zone 32

East:

597439 m.

North:

7025282 m.

Longitude:

10.9467740

Latitude:

63.3429720

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Resource

	Resource Type:	Ferrous metals(Fe, Mn, Ti)	Resource Subtype:	Iron
			Element(s):	Fe

Importance

Raw material meaning:

Little Importance (reg. 18.02.2015)

Resources and production

	Activity:	Pitting	Reserves:
	Operating method:		Historical production:

Mineralization

Era: Paleozoic Period:

Genesis: Volcex Form: Layer

Main texture: Banded Min. distribution: Semi-massive (20-50 % ore minerals)

Main grain size: Fine grained (< 1 mm) Main alteration:

Strike/Dip: 15 / 70 Direction:

Plunge:

Stratigraphic classification of host rock

Era: Paleozoic Period:

Province: Caledonides

Geotec.unit: Trondheim Nappe Complex

Tectonic complex: Støren Nappe

Igneous complex:

Group: Støren Formation:

Mineralogy

Relationship Mineral Amount

Gangue mineral Plagioclase Major mineral (>10%)

Gangue mineral Amphibole Major mineral (>10%)

Gangue mineral Epidote Subordinate mineral (1-10%)

Gangue mineral Carbonate Subordinate mineral (1-10%)

Gangue mineral Quartz Subordinate mineral (1-10%)

Ore mineral Magnetite Major mineral (>10%)

Ore mineral Pyrite Accessory mineral (<1%)

Lithology:

Relationship Rock Origin

Host rock Greenstone Extrusive
Original rock :Basalt

Metamorphic facies :Greenschist

Structures

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

Host rock Primary layering Strike/Dip :15 / 70 Syn-mineralisation ;...Effect :Controls

Information(s) in free text format

Free text

5 m sør for myr er det ei gjengrodd, grunn grop med 1 m3 tipp. Observerer bare svak magnetitt-disseminasjon i henggrønnstein. Fra tipp ses finkornet grønnstein med disseminert til semi-massiv magnetitt og spor av svovelkis (prøve 01). Epidot-kvarts-karbonatårer gjennomvever grønnsteinen.

Bibliography:

From NGU's Reference Archive:

Torske, Tore , 1965

Geology of the Mostadmarka and Selbustrand area, Trøndelag.

;Norges geologiske undersøkelse;TIDSSKRIFTARTIKKEL;NGU; No.232;1-83 + ka pages

Abstract:

The bedrock of the area consists of metamorphic epiclastic, volcanic, and intrusive rocks of assumed Lower Ordovician age, assigned to, and lithologically matching the rocks of, the Røros, Støren and Lower Hovin Groups of the Trondheim Region. A detailed petrographic description of the rock varieties is given. The metamorphic grade of all rocks corresponds to the Greenschist Facies. - Small ore deposits occur in connection with the volcanic rocks. They comprise pyrite-pyrrhotite ores of the Leksdal Type, mixed pyrite-magnetite ores, and iron oxide ores. - Lithological variations of the sedimentary rocks is tentatively correlated with events during the early periods of the Caledonian Orogeny. - The volcanism within the area seems to have started with a phase of explosive activity, followed by extrusion (mostly submarine) of copious amounts of spilitic lavas; towards the end of the main period of volcanism a new episode of explosive activity has produced what is called the upper pyroclastic horizon, comprising rocks ranging from coarse volcanic breccia to finegrained tuffs. - The intrusive rocks consist mainly of saussurite gabbros and quartz keratophyres. The latter are thought to be intrusive rather than effusive, and evidence is offered to support this. In some places the character of pyroclastic material points to a quartz keratophyre parentage. Thus, quartz keratophyres may have occurred both as intrusive and volcanic rocks.

Fieldsamples

Sample No. Sample type Miscellanrous

NT0205.01 Dump

Sampler: Wilberg/...Stored: Løkken

Comment: Fine grained greenstone with semi-massive magnetite mineralisation.

No. of registrated element analyses = 1

NB! All analyse values are shown at the end of the printout.:

Analyse Results

from

Deposit Area 5035 - 026 Kjerringmyra

Element analyses
( *=parts pr. million, #=parts pr.billion, Negative values means below detection limit value.)

Sample No. Sample Type Cu* Zn* Pb* Co* Ni* Ag* Au#

NT0205.01 Dump 28 29 -3 15 17 -.3 3.0

------------------

Sample No. Pt# Pd# Rh# As* Cd* Ba* Mo* Sb* Bi*

NT0205.01 1.0 -1.0 -1.0 3 -.2 15 -1.00 -2 -2

------------------

Sample No. S% V* Cr* Mn* Fe% Th* U* W* Sr*

NT0205.01 .09 182 43 262 7.35 -2.00 -5.00 -2 28.0

------------------

Sample No. La* B*

NT0205.01 2.00 3

Era:	Paleozoic	Period:
Genesis:	Volcex	Form:	Layer
Main texture:	Banded	Min. distribution:	Semi-massive (20-50 % ore minerals)

	Province:	Caledonides
	Geotec.unit:	Trondheim Nappe Complex
	Tectonic complex:	Støren Nappe
	Igneous complex:

Relationship	Mineral	Amount
Gangue mineral	Plagioclase	Major mineral (>10%)
Gangue mineral	Amphibole	Major mineral (>10%)
Gangue mineral	Epidote	Subordinate mineral (1-10%)
Gangue mineral	Carbonate	Subordinate mineral (1-10%)
Gangue mineral	Quartz	Subordinate mineral (1-10%)
Ore mineral	Magnetite	Major mineral (>10%)
Ore mineral	Pyrite	Accessory mineral (<1%)

Relationship	Rock	Origin
Host rock	Greenstone	Extrusive Original rock :Basalt
		Metamorphic facies :Greenschist

	Location:	Type:	Orientation(360 gr.):	Relation to min.:
	Host rock	Primary layering	Strike/Dip :15 / 70	Syn-mineralisation ;...Effect :Controls

Sample No.	Sample Type	Cu*	Zn*	Pb*	Co*	Ni*	Ag*	Au#
NT0205.01	Dump	28	29	-3	15	17	-.3	3.0

Sample No.	Pt#	Pd#	Rh#	As*	Cd*	Ba*	Mo*	Sb*	Bi*
NT0205.01	1.0	-1.0	-1.0	3	-.2	15	-1.00	-2	-2

Sample No.	S%	V*	Cr*	Mn*	Fe%	Th*	U*	W*	Sr*
NT0205.01	.09	182	43	262	7.35	-2.00	-5.00	-2	28.0