Fact Sheet for <b>Occurence 5043

					Norsk versjon
	THE ORE DATABASE
	Occurence 5043 - 055 Austvatnet
	(Object Id: 349) (Last updated: 16.05.2006)

Location

County:

Trøndelag

Municipality:

Raarvihke (5043)

Map 1:50000:

Røyrvik (1924-4)

Map 1:250000:

Grong

Coordinate system:

EU89-UTM Zone 33

East:

425512 m.

North:

7198989 m.

Longitude:

13.4257740

Latitude:

64.9067510

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Resource

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

Importance

Raw material meaning:

Little Importance (reg. 18.02.2015)

Resources and production

	Activity:	Pitting	Reserves:
	Operating method:		Historical production:

Operations

From - To Activity Comments

1977 - 1977 Core drilling Company/Institution :Grong Gruber A/S

1994 - 1994 Sampling Company/Institution :NGU

1995 - 1995 Geophysics Company/Institution :NGU

Mineralization

Era: Paleozoic Period: Ordovician

Genesis: Volcex Form: Layer

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

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

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 Quartz Major mineral (>10%)

Gangue mineral Plagioclase Major mineral (>10%)

Gangue mineral Chlorite Major mineral (>10%)

Ore mineral Pyrite Major mineral (>10%)

Ore mineral Chalcopyrite Subordinate mineral (1-10%)

Lithology:

Relationship Rock Origin

Host rock kvartskeratofyr Extrusive
Original rock :Rhyolite

Metamorphic facies :Greenschist

Wall rock grønnstein Extrusive
Original rock :Basalt

Metamorphic facies :Greenschist

Structures

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

Wall rock Foliation Strike/Dip :202 / 20 Post-mineralisation ;...Effect :Modifies

Information(s) in free text format

Free text

Forekomsten ligger i nordskråningen av en mindre kolle nord for Austvatnet. Elektromagnetiske målinger viser flere ledende sone med varierende ledningsevne. De er opptil 250 m lange. Et skjerp og en rekke rustsoner finnes. Mektigheten til den massive sulfidsonen i skjerpet er vanskelig å bestemme p.g.a. løsmasseoverdekningen, men den er trolig mindre enn 1 m. Sulfidsonen ligger tilnærmet flatt. Noe kobberanrikningen er påvist. Øst og sørøst for skjerpet finnes en rekke rustsoner med hovedsakelig disseminert svovelkis både i grønnstein og metaryodacitt. Bergartene er dels sterkt omvandlet.

Bibliography:

From NGU's Reference Archive:

Horvath, O.; Lorenser, E. , 1942

Bericht uber die Geoelektrische Untersuchung im Grongdistrikt.

;Norges geologiske undersøkelse;FAGRAPPORT;Bergarkivet; No.BA 1565;21 pages

Abstract:

Lok. Nr. 30499, 30492. Elektrisk-magnetiske målinger ble utført i Joma og Kirma. Det ble tilsammen målt 5,5 km2 i profiler på ca. 100 m lengde. På begge steder ble det påvist en rekke gode ledere utenfor de fra før kjente malmkroppene.

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).

Sandstad, Jan Sverre; Dalsegg, Einar; Elvebakk, Harald; Grenne, Tor; Heim, Michael; Meyer, Gurli B.; Reinsbakken, Arne; Roberts, David; Solli, Arne; Dyrstad, Geir Ståle , 1994

Samtolking av geodata i Grongfeltet - status pr. 15.12.94

;Norges geologiske undersøkelse;FAGRAPPORT;NGU-rapport; No.94.094;36 pages

Abstract:

Rapporten oppsummerer undersøkelsene som er utført innenfor prosjektet "Samtolkning av geodata i Grongfeltet" under feltsesongen 1994 og de fore- løpige resultatene fra disse er gitt. Oppfølgende undersøkelser var på bak- grunn av resultatene fra samtolkningen konsentrert i Gjersvik-området. Det besto av geologisk kartlegging og prøvetaking of bakkegeofysiske dypmålinger (transient-EM). I tillegg er kjerneboring gjennomført ved Godejord. Prøve- taking og kartlegging er utført for å videreutvikle kunnskapen om vulkanitt- stratigrafien og øke forståelsen for den magmatiske og hydrotermale utviklingen i Gjersvikdekket. Berggrunnskartlegging i M 1:20.000 er foretatt i Sanddøla- og Tromsfjell- områdene. Strukturgeologiske detaljundersøkelser og tolkninger av satelitt- bilder er gjort i Gjersvikområdet. De regionale helikoptermålingene er full- ført i den sørlige delen av Grongfeltet og innsamling av grunnlagsdata til bruk ved tolkning av denne er innsamlet. Ingen nye sulfidmineraliseringer av betydning er påvist i løpet av feltsesongen Foreløpige tolkninger av transient-EM målingene har heller ikke gitt positive indikasjoner, men prioriterte måleområder gjenstår fortsatt i Gjersvik-området. Kjerneboringen i Godejord har vist at de rikeste mineraliseringene avtar mot dypet.

Fieldsamples

Sample No. Sample type Miscellanrous

JS94007 Dump

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

Comment: pyrite ore, semi-massive, fine grained

No. of registrated element analyses = 1

JS94008 Dump

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

Comment: pyrite diss. in green, chlorite-rich rock

No. of registrated element analyses = 1

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

Name of Locality: Austvatnet øst

(Object Id: 522 55,01,00)

Location

County: Trøndelag Municipality: Raarvihke (5043)

Map 1:50000: Røyrvik (1924-4) Map 1:250000: Grong

Coordinate system: EU89-UTM Zone 33

East: 425682 m. North: 7198748 m.

Longitude: 13.4294910 Latitude: 64.9046350

Show on map

Resource

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

Element(s): Cu Kis

Resources and production

Activity: Exploration Reserves:

Operating method: Historical production:

Fieldsamples

Sample No. Sample type Miscellanrous

JS94005 Bedrock

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

Comment: pyrite diss. in fine grained, greyish white quartz-albite rock

No. of registrated element analyses = 1

JS94006 Bedrock

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

Comment: pyrite diss./veinlets in albite-chlorite rock

No. of registrated element analyses = 1

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

Name of Sample point: Austvatnet nordøst

(Object Id: 6943 55,01,01)

Location

County: Trøndelag Municipality: Raarvihke (5043)

Map 1:50000: Røyrvik (1924-4) Map 1:250000: Grong

Coordinate system: EU89-UTM Zone 33

East: 425632 m. North: 7198938 m.

Longitude: 13.4283350 Latitude: 64.9063290

Show on map

Resource

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

Element(s): Cu Kis

Fieldsamples

Sample No. Sample type Miscellanrous

JS94009 Bedrock

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

Comment: pyrite diss. in greyish white albite-rich rock

No. of registrated element analyses = 1

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

Name of Locality: Austvatnet vest - Bh95-1

(Object Id: 6945 55,02,00)

Location

County: Trøndelag Municipality: Raarvihke (5043)

Map 1:50000: Røyrvik (1924-4) Map 1:250000: Grong

Coordinate system: EU89-UTM Zone 33

East: 424792 m. North: 7199598 m.

Longitude: 13.4102410 Latitude: 64.9120600

Show on map

Resource

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

Element(s): Cu Kis

Resources and production

Activity: Exploration Reserves:

Operating method: Historical production:

Operations

From - To Activity Comments

1995 - 1995 Geophysics Company/Institution :NGU

1995 - 1995 Core drilling Company/Institution :Nord-Trøndelag Fylkeskommune

1995 - 1995 Sampling Company/Institution :NGU

Fieldsamples

Sample No. Sample type Miscellanrous

KI95001 Core

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

Comment: po+cpy, few py crystals, in deformed quartz diorite (69.7-69.9 m)

No. of registrated element analyses = 1

KI95002 Core

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

Comment: py-po veinlets in greyish green dolerite? (127.2-127.6 m)

No. of registrated element analyses = 1

KI95003 Core

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

Comment: chalcopyrite aggregates, pyrite diss./veinlets in fine grained, greyish green rock (142.6-142.95 m)

No. of registrated element analyses = 1

KI95004 Core

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

Comment: py veinlets in deformed, quartz phyric, quartz diorite (165.3-165.6 m)

No. of registrated element analyses = 1

KI95005 Core

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

Comment: py diss./veinlets in greenstone (214.5-215 m)

No. of registrated element analyses = 1

KI95006 Core

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

Comment: py-po diss./aggregates in greenstone (216.5-217 m)

No. of registrated element analyses = 1

KI95007 Core

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

Comment: po+cpy veins (0.5-3 cm) and py diss. in silicified greenstone (217.5-218 m)

No. of registrated element analyses = 1

KI95008 Core

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

Comment: po+cpy veins (< 3 cm) and py diss. in silicified greenstone.

No. of registrated element analyses = 1

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

Analyse Results

from

Deposit Area 5043 - 055 Austvatnet

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#

JS94005 Bedrock 5 79 -2 32 12 .4 4.0

JS94006 Bedrock 15 29 -2 27 4 .2 1.0

JS94007 Dump 20000 260 14 264 32 50.0 550.0

JS94008 Dump 8959 629 12 98 33 38.6 204.0

JS94009 Bedrock 212 45 -2 48 6 2.0 18.0

KI95001 Core 1647 27 9 14 4 .9 -2.0

KI95002 Core 173 49 13 5 4 -.3 -2.0

KI95003 Core 5923 203 40 33 4 6.7 94.0

KI95004 Core 68 182 25 5 4 -.3 6.0

KI95005 Core 501 85 3 54 17 1.0 2.0

KI95006 Core 361 200 3 37 16 .9 -2.0

KI95007 Core 2349 55 27 56 31 1.3 10.0

KI95008 Core 8905 906 8 30 23 4.1 12.0

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

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

JS94005 -5.0 -1.0 22 -1.0 16 8.00 -20 -5 5

JS94006 -5.0 -1.0 23 -1.0 7 5.00 -20 -5 5

JS94007 8.0 6.0 32 9.8 4 12.00 -20 -5 429

JS94008 6.0 4.0 75 3.4 -2 22.00 -20 -5 303

JS94009 -5.0 -1.0 117 -1.0 5 4.00 -20 -5 17

KI95001 -3.0 -3.0 7 .3 48 31.00 -2 5

KI95002 -3.0 -3.0 7 -.2 43 2.00 -2 3

KI95003 -3.0 -3.0 24 4.2 51 2.00 2 49

KI95004 -3.0 -3.0 8 1.5 78 16.00 -2 -2

KI95005 3.0 -3.0 31 .5 20 1.00 2 -2

KI95006 -3.0 -3.0 29 .8 15 -1.00 -2 3

KI95007 -3.0 -3.0 51 .5 31 1.00 -2 21

KI95008 -3.0 -3.0 52 8.4 17 -1.00 4 5

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

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

JS94005 6.91 83 141 409 6.11 -20 3.0

JS94006 6.33 67 147 683 6.60 -20 6.0

JS94007 34.28 27 215 750 9.99 -20 10.0

JS94008 19.38 109 230 2375 9.41 -20 16.0

JS94009 25.03 16 251 145 9.76 -20 -1.0

KI95001 9.86 12 1 426 14.79 12.00 -5.00 -2 25.0

KI95002 1.59 3 3 276 2.95 17.00 -5.00 -2 14.0

KI95003 5.20 2 2 191 6.94 9.00 -5.00 -2 14.0

KI95004 1.84 2 4 198 2.57 15.00 -5.00 -2 14.0

KI95005 2.28 115 9 783 7.98 -2.00 -5.00 -2 12.0

KI95006 2.31 119 10 1343 8.44 -2.00 -5.00 11 14.0

KI95007 10.69 10 2 55 16.17 -2.00 -5.00 23 3.0

KI95008 7.88 55 19 931 14.10 -2.00 -5.00 -2 3.0

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

Sample No. Y* La* B* Te*

JS94005 8.0 -1.00 -10.00

JS94006 3.0 -1.00 -10.00

JS94007 1.0 -1.00 34.00

JS94008 1.0 -1.00 22.00

JS94009 2.0 -1.00 -10.00

KI95001 19.00 -3

KI95002 26.00 -3

KI95003 19.00 -3

KI95004 26.00 3

KI95005 1.00 -3

KI95006 1.00 -3

KI95007 -1.00 -3

KI95008 -1.00 -3

From - To	Activity	Comments
1977 - 1977	Core drilling	Company/Institution :Grong Gruber A/S
1994 - 1994	Sampling	Company/Institution :NGU
1995 - 1995	Geophysics	Company/Institution :NGU

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

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

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

Relationship	Rock	Origin
Host rock	kvartskeratofyr	Extrusive Original rock :Rhyolite
		Metamorphic facies :Greenschist
Wall rock	grønnstein	Extrusive Original rock :Basalt
		Metamorphic facies :Greenschist

	Location:	Type:	Orientation(360 gr.):	Relation to min.:
	Wall rock	Foliation	Strike/Dip :202 / 20	Post-mineralisation ;...Effect :Modifies

	Abstract:
	Lok. Nr. 30499, 30492. Elektrisk-magnetiske målinger ble utført i Joma og Kirma. Det ble tilsammen målt 5,5 km2 i profiler på ca. 100 m lengde. På begge steder ble det påvist en rekke gode ledere utenfor de fra før kjente malmkroppene.

	Activity:	Exploration	Reserves:
	Operating method:		Historical production:

Sample No.	Sample Type	Cu*	Zn*	Pb*	Co*	Ni*	Ag*	Au#
JS94005	Bedrock	5	79	-2	32	12	.4	4.0
JS94006	Bedrock	15	29	-2	27	4	.2	1.0
JS94007	Dump	20000	260	14	264	32	50.0	550.0
JS94008	Dump	8959	629	12	98	33	38.6	204.0
JS94009	Bedrock	212	45	-2	48	6	2.0	18.0
KI95001	Core	1647	27	9	14	4	.9	-2.0
KI95002	Core	173	49	13	5	4	-.3	-2.0
KI95003	Core	5923	203	40	33	4	6.7	94.0
KI95004	Core	68	182	25	5	4	-.3	6.0
KI95005	Core	501	85	3	54	17	1.0	2.0
KI95006	Core	361	200	3	37	16	.9	-2.0
KI95007	Core	2349	55	27	56	31	1.3	10.0
KI95008	Core	8905	906	8	30	23	4.1	12.0

Sample No.	Pt#	Pd#	As*	Cd*	Ba*	Mo*	Sn*	Sb*	Bi*
JS94005	-5.0	-1.0	22	-1.0	16	8.00	-20	-5	5
JS94006	-5.0	-1.0	23	-1.0	7	5.00	-20	-5	5
JS94007	8.0	6.0	32	9.8	4	12.00	-20	-5	429
JS94008	6.0	4.0	75	3.4	-2	22.00	-20	-5	303
JS94009	-5.0	-1.0	117	-1.0	5	4.00	-20	-5	17
KI95001	-3.0	-3.0	7	.3	48	31.00		-2	5
KI95002	-3.0	-3.0	7	-.2	43	2.00		-2	3
KI95003	-3.0	-3.0	24	4.2	51	2.00		2	49
KI95004	-3.0	-3.0	8	1.5	78	16.00		-2	-2
KI95005	3.0	-3.0	31	.5	20	1.00		2	-2
KI95006	-3.0	-3.0	29	.8	15	-1.00		-2	3
KI95007	-3.0	-3.0	51	.5	31	1.00		-2	21
KI95008	-3.0	-3.0	52	8.4	17	-1.00		4	5

Sample No.	S%	V*	Cr*	Mn*	Fe%	Th*	U*	W*	Sr*
JS94005	6.91	83	141	409	6.11			-20	3.0
JS94006	6.33	67	147	683	6.60			-20	6.0
JS94007	34.28	27	215	750	9.99			-20	10.0
JS94008	19.38	109	230	2375	9.41			-20	16.0
JS94009	25.03	16	251	145	9.76			-20	-1.0
KI95001	9.86	12	1	426	14.79	12.00	-5.00	-2	25.0
KI95002	1.59	3	3	276	2.95	17.00	-5.00	-2	14.0
KI95003	5.20	2	2	191	6.94	9.00	-5.00	-2	14.0
KI95004	1.84	2	4	198	2.57	15.00	-5.00	-2	14.0
KI95005	2.28	115	9	783	7.98	-2.00	-5.00	-2	12.0
KI95006	2.31	119	10	1343	8.44	-2.00	-5.00	11	14.0
KI95007	10.69	10	2	55	16.17	-2.00	-5.00	23	3.0
KI95008	7.88	55	19	931	14.10	-2.00	-5.00	-2	3.0