Fact Sheet for <b>Occurence 5043 - 072 Store Gollomvatnet</b>

					Norsk versjon
	THE ORE DATABASE
	Occurence 5043 - 072 Store Gollomvatnet
	(Object Id: 366) (Last updated: 04.12.1998)

Location

County:

Trøndelag

Municipality:

Raarvihke (5043)

Map 1:50000:

Røyrvik (1924-4)

Map 1:250000:

Grong

Coordinate system:

EU89-UTM Zone 33

East:

436551 m.

North:

7204758 m.

Longitude:

13.6564160

Latitude:

64.9607900

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Resource

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

Importance

Raw material meaning:

Not Assessed (reg. 18.02.2015)

Resources and production

	Activity:	Pitting	Reserves:
	Operating method:		Historical production:

Operations

From - To Activity Comments

1969 - 1969 Geophysics Company/Institution :NGU

1969 - 1969 Sampling Company/Institution :NGU

1969 - 1969 Geochemistry Company/Institution :NGU

1976 - 1976 Geophysics Company/Institution :Grong Gruber

1996 - 1996 Sampling Company/Institution :NGU

Mineralization

Era: Paleozoic Period: Ordovician

Genesis: Volcex Form: Layer

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

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

Strike/Dip: 102 / 70 Direction:

Plunge:

Stratigraphic classification of host rock

Era: Paleozoic Period: Ordovician

Province: Caledonides

Geotec.unit: Køli Nappe Complex

Tectonic complex: Orklumpdekket

Igneous complex:

Group: Nordli Formation:

Mineralogy

Relationship Mineral Amount

Gangue mineral Quartz Major mineral (>10%)

Gangue mineral Plagioclase Major mineral (>10%)

Gangue mineral Chlorite Subordinate mineral (1-10%)

Gangue mineral Graphite Subordinate mineral (1-10%)

Ore mineral Pyrite Major mineral (>10%)

Ore mineral Pyrrhotite Major mineral (>10%)

Lithology:

Relationship Rock Origin

Host rock Quartz-feldspar gneiss Extrusive
Original rock :Rhyodacite

Metamorphic facies :Amphibolite

Host rock Graphite schist Sedimentary
Original rock :Bituminous argillite

Metamorphic facies :Amphibolite

Wall rock Amphibolite Extrusive
Original rock :Basalt

Metamorphic facies :Amphibolite

Wall rock Mica gneiss Extrusive
Original rock :Rhyodacite

Metamorphic facies :Amphibolite

Structures

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

Host rock Schistosity Strike/Dip :98 / 65 Post-mineralisation ;...Effect :Modifies

Host rock Mineral banding Strike/Dip :102 / 70 Post-mineralisation ;...Effect :Modifies

Wall rock Foliation Strike/Dip :106 / 65 Post-mineralisation ;...Effect :Modifies

Information(s) in free text format

Free text

Forekomsten ligger i en bekk 150 m syd for vestre del av Gollumvatn. Mineraliseringene er godt blottet ved mindre bekkestryk langs bekken som renner på tvers av bergartenes strøk. Bergartene i området tilhører Norligruppen og består i hovedsak av amfibolitt i veksling med glimmergneis (kvartskeratofyr) som antas representere henholdsvis mafiske og felsiske metavulkanitter. Nederst i den sulfidmineraliserte sona finnes magnetkis i strenger og linser i en 0.5 til 1.5 m mekrig fyllitisk grafittskifer (prøve NT0445.02). Tektonostratigrafisk over denne ligger en ca. 10 mektig kvarts-feltspat gneis med svak til moderat pyrittdisseminasjon og smale pyrittbånd (1 mm). Bergarten er pyrittrikest i de øverste 2-3 m (01). Lokalt er gneissen svært finkornet og chertaktig (03). Både over og under den sulfidmineraliserte sona følger glimmergneis og amfibolitt. Gjennomsnittsanalyser fra den sulfidmineraliserte grafittskiferen viser (Logn 1973): 200 ppm Cu, 350 ppm Zn, 80 ppm Pb.

Bibliography:

From NGU's Reference Archive:

Logn, Ø. , 1973

Geologiske, geofysiske og geokjemiske undersøkelser Grongfeltet/Grongprosjektet.

;Norges geologiske undersøkelse;FAGRAPPORT;NGU-rapport; No.1065

Abstract:

Under oppdragsnummer 1065 ble det utført undersøkelser på en rekke objekter. Det vises til NGU Rapport nr. 84.091: Statusrapport for geofysikk utført i Nord-Trøndelag fylke (1984).

Fieldsamples

Sample No. Sample type Miscellanrous

NT0445.01 Bedrock

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

Comment: Pyrite dissemination, weak to moderate and pyrite bands (1 mm) in medium grained, white-greyish white quartz-feldspar gneiss (quartz keratophyre).

No. of registrated element analyses = 1

NT0445.02 Bedrock

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

Comment: Pyrrhotite veinlets/lenses, fine grained in dark graphite schist.

No. of registrated element analyses = 1

NT0445.03 Bedrock

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

Comment: Pyrite/pyrrhotite in veinlets/fracture fillings and aggregates, in very fine grained, cherty quartz keratophyre.

No. of registrated element analyses = 1

1168 Bedrock

No. of registrated element analyses = 1

1169 Bedrock

No. of registrated element analyses = 1

1170 Bedrock

No. of registrated element analyses = 1

1171 Bedrock

No. of registrated element analyses = 1

1172 Bedrock

No. of registrated element analyses = 1

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

Analyse Results

from

Deposit Area 5043 - 072 Store Gollomvatnet

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#

NT0445.01 Bedrock 12 103 13 5 1 .7 1.0

NT0445.02 Bedrock 279 271 49 71 85 .7 3.0

NT0445.03 Bedrock 12 33 -3 3 2 -.3 -1.0

1168 Bedrock 165 329 124 95 71 1.0 13.0

1169 Bedrock 383 521 99 77 129 1.5 11.0

1170 Bedrock 412 591 154 83 138 1.6 17.0

1171 Bedrock 567 1789 50 75 221 2.6 19.0

1172 Bedrock 237 225 82 18 183 1.8 9.0

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

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

NT0445.01 -1.0 -1.0 -1.0 77 -.2 12 1.00 -2 -2

NT0445.02 8.0 17.0 2.0 12 1.4 17 29.00 2 -2

NT0445.03 1.0 1.0 2.0 6 -.2 6 1.00 -2 -2

1168 7.0 42.0 146 2.4 9 66.00 3 3

1169 9.0 31.0 95 3.3 10 63.00 2 2

1170 11.0 44.0 98 4.4 10 65.00 7 2

1171 12.0 48.0 36 11.6 9 31.00 2 5

1172 21.0 5.0 9 1.6 12 63.00 2 2

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

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

NT0445.01 4.60 3 2 47 6.85 -2.00 -5.00 -2 4.0

NT0445.02 5.43 69 16 1203 8.90 9.00 26.00 -2 12.0

NT0445.03 .83 2 1 27 1.83 -2.00 -5.00 -2 3.0

1168 15.28 24 5 1430 13.69 6.00 50.00 1 9.0

1169 14.71 27 7 563 14.83 7.00 25.00 1 7.0

1170 15.32 20 6 498 14.14 4.00 11.00 2 3.0

1171 22.01 48 18 387 24.94 6.00 15.00 5 4.0

1172 13.87 42 16 302 17.93 9.00 35.00 1 7.0

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

Sample No. La* B*

NT0445.01 2.00 -3

NT0445.02 36.00 -3

NT0445.03 3.00 -3

1168 12.00 2

1169 13.00 2

1170 8.00 3

1171 6.00 2

1172 24.00 2

From - To	Activity	Comments
1969 - 1969	Geophysics	Company/Institution :NGU
1969 - 1969	Sampling	Company/Institution :NGU
1969 - 1969	Geochemistry	Company/Institution :NGU
1976 - 1976	Geophysics	Company/Institution :Grong Gruber
1996 - 1996	Sampling	Company/Institution :NGU

Era:	Paleozoic	Period:	Ordovician
Genesis:	Volcex	Form:	Layer
Main texture:	Structureless	Min. distribution:	Disseminated (<20 % ore minerals)

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

Relationship	Mineral	Amount
Gangue mineral	Quartz	Major mineral (>10%)
Gangue mineral	Plagioclase	Major mineral (>10%)
Gangue mineral	Chlorite	Subordinate mineral (1-10%)
Gangue mineral	Graphite	Subordinate mineral (1-10%)
Ore mineral	Pyrite	Major mineral (>10%)
Ore mineral	Pyrrhotite	Major mineral (>10%)

Relationship	Rock	Origin
Host rock	Quartz-feldspar gneiss	Extrusive Original rock :Rhyodacite
		Metamorphic facies :Amphibolite
Host rock	Graphite schist	Sedimentary Original rock :Bituminous argillite
		Metamorphic facies :Amphibolite
Wall rock	Amphibolite	Extrusive Original rock :Basalt
		Metamorphic facies :Amphibolite
Wall rock	Mica gneiss	Extrusive Original rock :Rhyodacite
		Metamorphic facies :Amphibolite

Location:	Type:	Orientation(360 gr.):	Relation to min.:
Host rock	Schistosity	Strike/Dip :98 / 65	Post-mineralisation ;...Effect :Modifies
Host rock	Mineral banding	Strike/Dip :102 / 70	Post-mineralisation ;...Effect :Modifies
Wall rock	Foliation	Strike/Dip :106 / 65	Post-mineralisation ;...Effect :Modifies

	Abstract:
	Under oppdragsnummer 1065 ble det utført undersøkelser på en rekke objekter. Det vises til NGU Rapport nr. 84.091: Statusrapport for geofysikk utført i Nord-Trøndelag fylke (1984).

Sample No.	Sample Type	Cu*	Zn*	Pb*	Co*	Ni*	Ag*	Au#
NT0445.01	Bedrock	12	103	13	5	1	.7	1.0
NT0445.02	Bedrock	279	271	49	71	85	.7	3.0
NT0445.03	Bedrock	12	33	-3	3	2	-.3	-1.0
1168	Bedrock	165	329	124	95	71	1.0	13.0
1169	Bedrock	383	521	99	77	129	1.5	11.0
1170	Bedrock	412	591	154	83	138	1.6	17.0
1171	Bedrock	567	1789	50	75	221	2.6	19.0
1172	Bedrock	237	225	82	18	183	1.8	9.0

Sample No.	S%	V*	Cr*	Mn*	Fe%	Th*	U*	W*	Sr*
NT0445.01	4.60	3	2	47	6.85	-2.00	-5.00	-2	4.0
NT0445.02	5.43	69	16	1203	8.90	9.00	26.00	-2	12.0
NT0445.03	.83	2	1	27	1.83	-2.00	-5.00	-2	3.0
1168	15.28	24	5	1430	13.69	6.00	50.00	1	9.0
1169	14.71	27	7	563	14.83	7.00	25.00	1	7.0
1170	15.32	20	6	498	14.14	4.00	11.00	2	3.0
1171	22.01	48	18	387	24.94	6.00	15.00	5	4.0
1172	13.87	42	16	302	17.93	9.00	35.00	1	7.0

Sample No.	La*	B*
NT0445.01	2.00	-3
NT0445.02	36.00	-3
NT0445.03	3.00	-3
1168	12.00	2
1169	13.00	2
1170	8.00	3
1171	6.00	2
1172	24.00	2