Fact Sheet for <b>Occurence 5043

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	THE ORE DATABASE
	Occurence 5043 - 036 Gaizervann
	(Object Id: 276) (Last updated: 16.05.2006)

Location

County:

Trøndelag

Municipality:

Raarvihke (5043)

Map 1:50000:

Skorovatn (1824-2)

Map 1:250000:

Grong

Coordinate system:

EU89-UTM Zone 33

East:

410611 m.

North:

7159249 m.

Longitude:

13.1357660

Latitude:

64.5466940

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Resource

	Resource Type:	Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn)	Resource Subtype:	Copper
			Element(s):	Cu Mo

Importance

Raw material meaning:

Little Importance (reg. 18.02.2015)

Resources and production

	Activity:	Exploration	Reserves:
	Operating method:		Historical production:

Operations

From - To Activity Comments

1973 - 1973 Geology Company/Institution :Grong Gruber

1975 - 1975 Sampling Company/Institution :Grong Gruber

1979 - 1979 Inspection Company/Institution :NTH, F.M. Vokes

1982 - 1982 Geology Company/Institution :Grong Gruber

1990 - 1990 Geology Company/Institution :Norsulfid (U. Søvegjarto)

1996 - 1996 Sampling Company/Institution :NGU

Mineralization

Era: Paleozoic Period: Ordovician

Genesis: Porphyry-type Form: Irregular

Main texture: Structureless Min. distribution: Disseminated (<20 % ore minerals)

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

Strike/Dip: Direction:

Plunge:

Stratigraphic classification of host rock

Era: Paleozoic Period: Ordovician

Province: Caledonides

Geotec.unit: Køli Nappe Complex

Tectonic complex: Gjersvik Nappe

Igneous complex: Skorovass Complex

Group: Gjersvik Formation:

Mineralogy

Relationship Mineral Amount

Gangue mineral Plagioclase Major mineral (>10%)

Gangue mineral Quartz Major mineral (>10%)

Gangue mineral Sericite Subordinate mineral (1-10%)

Ore mineral Pyrite Major mineral (>10%)

Ore mineral Chalcopyrite Subordinate mineral (1-10%)

Ore mineral Molybdenite Accessory mineral (<1%)

Ore mineral Magnetite Accessory mineral (<1%)

Lithology:

Relationship Rock Origin

Host rock Trondhjemitt Intrusive
Original rock :Quartz diorite

Metamorphic facies :Greenschist

Host rock Grønnstein Extrusive
Original rock :Basalt

Metamorphic facies :Greenschist

Structures

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

Host rock Schistosity Strike/Dip :248 / 90 Post-mineralisation ;...Effect :Modifies

Wall rock Foliation Strike/Dip :260 / 60 Post-mineralisation ;...Effect :None

Information(s) in free text format

Free text

Forekomsten ligger 10 km rett S for Skorovatn. Adkomst derfra delvis etter en sti forbi drikkevannskilden til Skorovatn. Alternativ adkomst fra Berg gård i Sanddøladalen eller Arnbygget 6 km nordvest for Skjelbreitunet. Berggrunnen i området består av et grønnsteinsbelte inne i Limingengruppens arkoser. Grønnsteinen er intrudert av utallige trondhjemittlegemer. Området har mange punkter med mineralisering, Cu/Mo i kvartsårer i trondhjemitten og svovelkis/kobberkis disseminert og i årer i grønnsteinen. Området er tolket å tilhøre et stort porphyry-system som omfatter Fremstfjell-Skardfjell og Gaizervatn. Jane Enderby (1983) foreslår en genetisk modell der de tre delområdene representerer ulike nivåer i plutonen. Hun mener at Gaizervatn ligger høyest, slik at malmpotensialet her er det største sammenlignet med f.eks. Skardfjell der hun tror hele den eventuelle malmen er erodert bort. Det mindre skjerpet, Blåmuren består av en 30-40 cm mektig jernformasjon (magnetitt-pyritt-kvarts) som opptrer i tilknytning til en 5 - 15 m mektig chert/blåkvartsitt i grønnstein.

Bibliography:

From NGU's Reference Archive:

Gale, George H. , 1975

Geology and sulphide mineralization in the Sanddøla-Gaizavann area, Grong, Nord-Trøndelag.

;Norges geologiske undersøkelse;FAGRAPPORT;NGU-rapport; No.1293;65 pages

Abstract:

Geologisk kartlegging i Grongfeltet i kartbladene Harran 1824 III, Grong 1823 IV, Andorsjøen 1823 I, Namsskogan 1824 II og Tunnsjøen 1924 III. Petrografisk og strukturgeologisk beskrivelse av bergartene. Beskrivelse av sulfidmineralisering og mulig porfyr Mo forekomst ved Fremstfjell.

Fieldsamples

Sample No. Sample type Miscellanrous

NT0316.01 Bedrock

Sampler: Sandstad, J.S./...Stored: Løkken/...Size(kg): 2

Comment: py diss, moderate to strong in ligth greyish white, fine to medium grained trondhjemite, ligth mica.

No. of registrated element analyses = 1

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

Name of Sample point: Gaizervann

(Object Id: 3903 36,00,01)

Location

County: Trøndelag Municipality: Raarvihke (5043)

Map 1:50000: Skorovatn (1824-2) Map 1:250000: Grong

Coordinate system: EU89-UTM Zone 33

East: 410211 m. North: 7158959 m.

Longitude: 13.1276080 Latitude: 64.5439870

Show on map

Resource

Resource Type: Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) Resource Subtype: Copper

Element(s): Cu Mo

Fieldsamples

Sample No. Sample type Miscellanrous

NT0316.02 Bedrock

Sampler: Sandstad, J.S./...Stored: Løkken/...Size(kg): 2

Comment: py+cpy+mo? joints/veinlets and diss. in very fine grained, greyish white felsic rock.

No. of registrated element analyses = 1

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

Name of Sample point: Gaizervann

(Object Id: 3904 36,00,02)

Location

County: Trøndelag Municipality: Raarvihke (5043)

Map 1:50000: Skorovatn (1824-2) Map 1:250000: Grong

Coordinate system: EU89-UTM Zone 33

East: 410701 m. North: 7159239 m.

Longitude: 13.1376480 Latitude: 64.5466280

Show on map

Resource

Resource Type: Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) Resource Subtype: Copper

Element(s): Cu Mo

Fieldsamples

Sample No. Sample type Miscellanrous

NT0316.03 Bedrock

Sampler: Sandstad, J.S./...Stored: Løkken/...Size(kg): 2

Comment: py joint fillings and diss., few mo-q veins, in green to ligth green, greenstone.

No. of registrated element analyses = 1

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

Name of Sample point: Gaizervann

(Object Id: 3905 36,00,03)

Location

County: Trøndelag Municipality: Raarvihke (5043)

Map 1:50000: Skorovatn (1824-2) Map 1:250000: Grong

Coordinate system: EU89-UTM Zone 33

East: 410791 m. North: 7159299 m.

Longitude: 13.1394870 Latitude: 64.5471890

Show on map

Resource

Resource Type: Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) Resource Subtype: Copper

Element(s): Cu Mo

Fieldsamples

Sample No. Sample type Miscellanrous

NT0316.04 Bedrock

Sampler: Sandstad, J.S./...Stored: Løkken/...Size(kg): 2

Comment: py joint fillings/diss. + mo joint fillings/veinlets in fine to coarse grained, quartz vein.

No. of registrated element analyses = 1

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

Name of Sample point: Gaizervann

(Object Id: 3906 36,00,04)

Location

County: Trøndelag Municipality: Raarvihke (5043)

Map 1:50000: Skorovatn (1824-2) Map 1:250000: Grong

Coordinate system: EU89-UTM Zone 33

East: 411691 m. North: 7159299 m.

Longitude: 13.1582460 Latitude: 64.5474250

Show on map

Resource

Resource Type: Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) Resource Subtype: Copper

Element(s): Cu Mo

Fieldsamples

Sample No. Sample type Miscellanrous

NT0316.05 Bedrock

Sampler: Sandstad, J.S./...Stored: Løkken/...Size(kg): 2

Comment: py joint fillings, many, in very fine grained, bluish grey, felsic rock with bleaching enveloping the joints.

No. of registrated element analyses = 1

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

Name of Locality: Blåmuren

(Object Id: 541 36,01,00)

Location

County: Trøndelag Municipality: Raarvihke (5043)

Map 1:50000: Skorovatn (1824-2) Map 1:250000: Grong

Coordinate system: EU89-UTM Zone 33

East: 410341 m. North: 7158929 m.

Longitude: 13.1303360 Latitude: 64.5437530

Show on map

Resource

Resource Type: Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) Resource Subtype: Copper

Element(s): Kis Fe

Resources and production

Activity: Pitting Reserves:

Operating method: Historical production:

Mineralogy

Relationship Mineral Amount

Gangue mineral Quartz Major mineral (>10%)

Ore mineral Pyrite Major mineral (>10%)

Ore mineral Magnetite Major mineral (>10%)

Lithology:

Relationship Rock Origin

Wall rock Blåkvartsitt Sedimentary
Original rock :Siliceous rock

Metamorphic facies :Greenschist

Information(s) in free text format

Free text

Skjerpet ligger ved en magnetittførende chert (blåkvarts) som er 5 - 15m mektig og kan følges over få hundre meter. I tilknytning til chert finnes få dm brede magnetittbenker, dels med pyritt bånd.

Fieldsamples

Sample No. Sample type Miscellanrous

JS96017 Bedrock

Sampler: Sandstad, J.S./...Stored: Løkken/...Size(kg): 2

Comment: BIF, fine grained mt and medium to coarse grained q-py bands.

No. of registrated element analyses = 1

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

Analyse Results

from

Deposit Area 5043 - 036 Gaizervann

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#

JS96017 Bedrock 8637 150 -3 33 62 6.2 19.0

NT0316.01 Bedrock 8 15 -3 6 7 -.3 3.0

NT0316.02 Bedrock 809 6 3 2 1 .6 6.0

NT0316.03 Bedrock 405 52 -3 17 78 -.3 1.0

NT0316.04 Bedrock 19 4 -3 4 15 -.3 1.0

NT0316.05 Bedrock 100 46 -3 7 2 -.3 2.0

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

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

JS96017 2.0 6.0 -1.0 52 .9 11 17.00 -2 6

NT0316.01 -1.0 1.0 -1.0 -2 -.2 43 27.00 -2 2

NT0316.02 -1.0 -1.0 -1.0 -2 -.2 13 3.00 -2 2

NT0316.03 -1.0 -1.0 -1.0 -2 -.2 6 56.00 -2 -2

NT0316.04 1.0 6.0 2.0 3 -.2 14 1591.00 -2 2

NT0316.05 1.0 1.0 -1.0 -2 -.2 26 31.00 -2 -2

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

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

JS96017 8.09 130 30 1144 31.16 5.00 -5.00 132 9.0

NT0316.01 2.55 11 4 59 2.28 3.00 -5.00 7 76.0

NT0316.02 .98 4 2 43 1.96 2.00 -5.00 14 15.0

NT0316.03 1.02 102 213 751 5.36 -2.00 -5.00 3 294.0

NT0316.04 .29 1 28 70 1.84 -2.00 -5.00 13 3.0

NT0316.05 1.00 8 2 72 3.33 -2.00 -5.00 15 19.0

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

Sample No. La* B*

JS96017 4.00 -3

NT0316.01 15.00 3

NT0316.02 3.00 -3

NT0316.03 -1.00 -3

NT0316.04 -1.00 -3

NT0316.05 2.00 -3

From - To	Activity	Comments
1973 - 1973	Geology	Company/Institution :Grong Gruber
1975 - 1975	Sampling	Company/Institution :Grong Gruber
1979 - 1979	Inspection	Company/Institution :NTH, F.M. Vokes
1982 - 1982	Geology	Company/Institution :Grong Gruber
1990 - 1990	Geology	Company/Institution :Norsulfid (U. Søvegjarto)
1996 - 1996	Sampling	Company/Institution :NGU

Era:	Paleozoic	Period:	Ordovician
Genesis:	Porphyry-type	Form:	Irregular
Main texture:	Structureless	Min. distribution:	Disseminated (<20 % ore minerals)

	Province:	Caledonides
	Geotec.unit:	Køli Nappe Complex
	Tectonic complex:	Gjersvik Nappe
	Igneous complex:	Skorovass Complex

Relationship	Mineral	Amount
Gangue mineral	Plagioclase	Major mineral (>10%)
Gangue mineral	Quartz	Major mineral (>10%)
Gangue mineral	Sericite	Subordinate mineral (1-10%)
Ore mineral	Pyrite	Major mineral (>10%)
Ore mineral	Chalcopyrite	Subordinate mineral (1-10%)
Ore mineral	Molybdenite	Accessory mineral (<1%)
Ore mineral	Magnetite	Accessory mineral (<1%)

Relationship	Rock	Origin
Host rock	Trondhjemitt	Intrusive Original rock :Quartz diorite
		Metamorphic facies :Greenschist
Host rock	Grønnstein	Extrusive Original rock :Basalt
		Metamorphic facies :Greenschist

Location:	Type:	Orientation(360 gr.):	Relation to min.:
Host rock	Schistosity	Strike/Dip :248 / 90	Post-mineralisation ;...Effect :Modifies
Wall rock	Foliation	Strike/Dip :260 / 60	Post-mineralisation ;...Effect :None

	Abstract:
	Geologisk kartlegging i Grongfeltet i kartbladene Harran 1824 III, Grong 1823 IV, Andorsjøen 1823 I, Namsskogan 1824 II og Tunnsjøen 1924 III. Petrografisk og strukturgeologisk beskrivelse av bergartene. Beskrivelse av sulfidmineralisering og mulig porfyr Mo forekomst ved Fremstfjell.

	Activity:	Pitting	Reserves:
	Operating method:		Historical production:

Sample No.	Sample Type	Cu*	Zn*	Pb*	Co*	Ni*	Ag*	Au#
JS96017	Bedrock	8637	150	-3	33	62	6.2	19.0
NT0316.01	Bedrock	8	15	-3	6	7	-.3	3.0
NT0316.02	Bedrock	809	6	3	2	1	.6	6.0
NT0316.03	Bedrock	405	52	-3	17	78	-.3	1.0
NT0316.04	Bedrock	19	4	-3	4	15	-.3	1.0
NT0316.05	Bedrock	100	46	-3	7	2	-.3	2.0

Sample No.	Pt#	Pd#	Rh#	As*	Cd*	Ba*	Mo*	Sb*	Bi*
JS96017	2.0	6.0	-1.0	52	.9	11	17.00	-2	6
NT0316.01	-1.0	1.0	-1.0	-2	-.2	43	27.00	-2	2
NT0316.02	-1.0	-1.0	-1.0	-2	-.2	13	3.00	-2	2
NT0316.03	-1.0	-1.0	-1.0	-2	-.2	6	56.00	-2	-2
NT0316.04	1.0	6.0	2.0	3	-.2	14	1591.00	-2	2
NT0316.05	1.0	1.0	-1.0	-2	-.2	26	31.00	-2	-2

Sample No.	S%	V*	Cr*	Mn*	Fe%	Th*	U*	W*	Sr*
JS96017	8.09	130	30	1144	31.16	5.00	-5.00	132	9.0
NT0316.01	2.55	11	4	59	2.28	3.00	-5.00	7	76.0
NT0316.02	.98	4	2	43	1.96	2.00	-5.00	14	15.0
NT0316.03	1.02	102	213	751	5.36	-2.00	-5.00	3	294.0
NT0316.04	.29	1	28	70	1.84	-2.00	-5.00	13	3.0
NT0316.05	1.00	8	2	72	3.33	-2.00	-5.00	15	19.0

Sample No.	La*	B*
JS96017	4.00	-3
NT0316.01	15.00	3
NT0316.02	3.00	-3
NT0316.03	-1.00	-3
NT0316.04	-1.00	-3
NT0316.05	2.00	-3