Fact Sheet for <b>Occurence 5042 - 006 Furutangvika</b>

					Norsk versjon
	THE ORE DATABASE
	Occurence 5042 - 006 Furutangvika
	(Object Id: 255) (Last updated: 16.05.2006)

Location

County:

Trøndelag

Municipality:

Lierne (5042)

Map 1:50000:

Tunnsjøen (1924-3)

Map 1:250000:

Grong

Coordinate system:

EU89-UTM Zone 33

East:

427182 m.

North:

7179879 m.

Longitude:

13.4708040

Latitude:

64.7357070

Show on map

Resource

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

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

1993 - 1993 Sampling Company/Institution :NGU

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: Albitisation

Strike/Dip: 316 / 15 Direction:

Plunge:

Stratigraphic classification of host rock

Era: Paleozoic Period: Ordovician

Province: Caledonides

Geotec.unit: Køli Nappe Complex

Tectonic complex: Gjersvik Nappe

Igneous complex:

Group: Gjersvik Formation:

Mineralogy

Relationship Mineral Amount

Gangue mineral Quartz Major mineral (>10%)

Gangue mineral Albite Major mineral (>10%)

Gangue mineral Chlorite Subordinate mineral (1-10%)

Gangue mineral Amphibole Subordinate mineral (1-10%)

Gangue mineral Sericite Subordinate mineral (1-10%)

Ore mineral Pyrite Major mineral (>10%)

Lithology:

Relationship Rock Origin

Host rock Quartz keratophyre Extrusive
Original rock :Rhyolite

Metamorphic facies :Greenschist

Host rock Greenschist Extrusive
Original rock :Basalt

Metamorphic facies :Greenschist

Structures

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

Host rock Schistosity Strike/Dip :316 / 15 Post-mineralisation ;...Effect :Modifies

Information(s) in free text format

Free text

Mineraliseringene finnes i rustfargete veiskjæringer langs veien mellom Tunnsjøen og Tunnsjø-Røyrvik, 500 m nordvest for gården Furutangvika. Mineraliseringen består av en 4 m mektig sone med varierende sulfiddisseminasjon i grønnskifer og kvartskeratofyr. Sonen kan følges 30-40 m langs strøket før den forsvinner i overdekke. Den rikeste mineraliseringen finnes i få cm brede semi-massive svovelkis bånd i finkornet kvarts-feltspat rik bergart. Denne kan representere kvartskeratofyr eller sterkt omvandlet grønnstein.

Bibliography:

From NGU's Reference Archive:

Oftedahl, Christoffer , 1958

Oversikt over Grongfeltets skjerp og malmforekomster.

;Norges geologiske undersøkelse;TIDSSKRIFTARTIKKEL;NGU; No.202;1-75 + fo pages

Abstract:

Ore occurences of the Grong area: In the period 1910-1918 a great number of ore occurences were discovered in the Grong area. The late state geologist Steinar Foslie mapped the area in the years 1922-1931. Foslie also mapped all claims and occurences and made special field investigations in a few cases. This book presents a survey of all occurences chiefly based on the field observations of Foslie. In addition the present author has done some field work in connection with the three large deposits, Joma, Skorovass, and Gjersvik. The map, Plate 1, shows the areal geology and the location of the occurrences, numbered from 1 to 131. the ore of the occurrences is chiefly pyrite. The larger occurrences also contain some chalcopyrite and sphalerite etc. and the smaller occurrences contain ither pure pyrite with some magnetite. The Joma deposit (No. 1), contains about 15.5 mill. tons of ore. The ore zone forms an arc and is situated within a thick series of greenstones (Fig. 1). The Skorovass mine (No. 2), contains about 7,5 mill. tons of ore. The deposit is situated in a greenstone complex (Fig. 7), and is immediately surrounded by asid tuffs of quartz keratophyric composition (Table 1).

Fieldsamples

Sample No. Sample type Miscellanrous

JS93070 Bedrock

Sampler: Sandstad, J.S./...Stored: Løkken

Comment: Magnetite bands, thin, few pyrite grains, in dark green tuffitte.

No. of registrated element analyses = 1

JS93072 Bedrock

Sampler: Sandstad, J.S./...Stored: Løkken

Comment: Disseminated pyrite in quartz-sericite rock.

No. of registrated element analyses = 1

NT0289.01 Bedrock

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

Comment: Pyrite ore, semi-massive, fine grained, 1-2 cm thick bands in fine grained quartz-feldspathic rock.

No. of registrated element analyses = 1

NT0289.02 Bedrock

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

Comment: Pyrite dissemination, weak to strong, in felsic layers/lenses in greenschist.

No. of registrated element analyses = 1

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

Analyse Results

from

Deposit Area 5042 - 006 Furutangvika

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#

JS93070 Bedrock 661 189 74 43 4 .5 11.0

JS93072 Bedrock 322 38 2 28 3 .4 7.0

NT0289.01 Bedrock 223 50 14 160 4 -.3 8.0

NT0289.02 Bedrock 929 65 -3 54 8 -.3 11.0

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

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

JS93070 -5.0 -1.0 51 -1.0 7 7.00 -20 -5

JS93072 -5.0 -1.0 41 -1.0 7 4.00 -20 -5

NT0289.01 -1.0 -1.0 -1.0 19 -.2 4 4.00 -2

NT0289.02 1.0 4.0 3.0 4 -.2 19 4.00 -2

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

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

JS93070 7 4.62 218 128 1213 8.14 -20

JS93072 6 7.59 111 197 323 7.25 -20

NT0289.01 -2 21.73 93 8 309 15.78 -2.00 -5.00 -2

NT0289.02 6 4.68 204 8 1081 16.72 -2.00 -5.00 -2

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

Sample No. Sr* Y* La* B* Te*

JS93070 5.0 6.0 -1.00 -10.00

JS93072 9.0 3.0 -1.00 -10.00

NT0289.01 10.0 -1.00 4

NT0289.02 4.0 -1.00 -3

From - To	Activity	Comments
1993 - 1993	Sampling	Company/Institution :NGU
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:	Gjersvik Nappe
	Igneous complex:

Relationship	Mineral	Amount
Gangue mineral	Quartz	Major mineral (>10%)
Gangue mineral	Albite	Major mineral (>10%)
Gangue mineral	Chlorite	Subordinate mineral (1-10%)
Gangue mineral	Amphibole	Subordinate mineral (1-10%)
Gangue mineral	Sericite	Subordinate mineral (1-10%)
Ore mineral	Pyrite	Major mineral (>10%)

Relationship	Rock	Origin
Host rock	Quartz keratophyre	Extrusive Original rock :Rhyolite
		Metamorphic facies :Greenschist
Host rock	Greenschist	Extrusive Original rock :Basalt
		Metamorphic facies :Greenschist

	Location:	Type:	Orientation(360 gr.):	Relation to min.:
	Host rock	Schistosity	Strike/Dip :316 / 15	Post-mineralisation ;...Effect :Modifies

Sample No.	Sample Type	Cu*	Zn*	Pb*	Co*	Ni*	Ag*	Au#
JS93070	Bedrock	661	189	74	43	4	.5	11.0
JS93072	Bedrock	322	38	2	28	3	.4	7.0
NT0289.01	Bedrock	223	50	14	160	4	-.3	8.0
NT0289.02	Bedrock	929	65	-3	54	8	-.3	11.0

Sample No.	Pt#	Pd#	Rh#	As*	Cd*	Ba*	Mo*	Sn*	Sb*
JS93070	-5.0	-1.0		51	-1.0	7	7.00	-20	-5
JS93072	-5.0	-1.0		41	-1.0	7	4.00	-20	-5
NT0289.01	-1.0	-1.0	-1.0	19	-.2	4	4.00		-2
NT0289.02	1.0	4.0	3.0	4	-.2	19	4.00		-2

Sample No.	Bi*	S%	V*	Cr*	Mn*	Fe%	Th*	U*	W*
JS93070	7	4.62	218	128	1213	8.14			-20
JS93072	6	7.59	111	197	323	7.25			-20
NT0289.01	-2	21.73	93	8	309	15.78	-2.00	-5.00	-2
NT0289.02	6	4.68	204	8	1081	16.72	-2.00	-5.00	-2

Sample No.	Sr*	Y*	La*	B*	Te*
JS93070	5.0	6.0	-1.00		-10.00
JS93072	9.0	3.0	-1.00		-10.00
NT0289.01	10.0		-1.00	4
NT0289.02	4.0		-1.00	-3