Fact Sheet for <b>Occurence 5042

					Norsk versjon
	THE ORE DATABASE
	Occurence 5042 - 008 Østnes
	(Object Id: 274) (Last updated: 07.12.1998)

Location

County:

Trøndelag

Municipality:

Lierne (5042)

Map 1:50000:

Limingen (1924-2)

Map 1:250000:

Grong

Coordinate system:

EU89-UTM Zone 33

East:

439831 m.

North:

7176274 m.

Longitude:

13.7378740

Latitude:

64.7058690

Show on map

Resource

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

Importance

Raw material meaning:

Not Assessed (reg. 18.02.2015)

Resources and production

	Activity:	Exploration	Reserves:
	Operating method:		Historical production:

Operations

From - To Activity Comments

1970 - 1970 Sampling Company/Institution :NGU

1991 - 1991 Sampling Company/Institution :NGU

1996 - 1996 Inspection 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: Medium grained (1-3 mm) Main alteration: No country rock alteration

Strike/Dip: Direction:

Plunge:

Stratigraphic classification of host rock

Era: Paleozoic Period: Ordovician

Province: Caledonides

Geotec.unit: Køli Nappe Complex

Tectonic complex: Leipikvatn Nappe

Igneous complex:

Group: Røyrvik Formation: Røyrvik phyllite

Mineralogy

Relationship Mineral Amount

Gangue mineral Quartz Major mineral (>10%)

Gangue mineral Plagioclase Major mineral (>10%)

Gangue mineral Muscovite Major mineral (>10%)

Gangue mineral Graphite Subordinate mineral (1-10%)

Gangue mineral Chlorite Subordinate mineral (1-10%)

Ore mineral Pyrrhotite Major mineral (>10%)

Ore mineral Arsenopyrite Subordinate mineral (1-10%)

Ore mineral Pyrite Subordinate mineral (1-10%)

Ore mineral Chalcopyrite Subordinate mineral (1-10%)

Ore mineral Sphalerite Subordinate mineral (1-10%)

Lithology:

Relationship Rock Origin

Host rock Graphitic phyllite Sedimentary
Original rock :Argillaceous sediment

Metamorphic facies :Greenschist

Wall rock Greenstone Extrusive
Original rock :Basalt

Metamorphic facies :Greenschist

Structures

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

Host rock Hydrothermal vein Strike/Dip :54 / 40 Syn-mineralisation ;...Effect :Controls

Host rock Fold axis Dir./Plunge :62 / 20 Post-mineralisation ;...Effect :Modifies

Information(s) in free text format

Free text

Mineraliseringen ligger ytterst på neset nedenfor Limingen gård ved sørøstenden av Limingen. De største blotningene finnes på stranda ved lav vannstand i den regulerte Limingen. Mindre blotninger finnes langs kanten mellom stranda og skogen. Varierende sulfidmineralisering i fet grafittfyllitt som er sterkt forskifret og småfoldet, dels sammen med en sterkt omvandlet ekstrusiv vulkanitt (tuffitt, grønnstein). Den mineraliserte sonen er blottet i 10 m's bredde ved lav vannstand. Opptil 0.5 m mektige bånd av semi-massiv magnetkis opptrer småfoldet sammen med konkordante kvartsårer. Kvartsårene er anriket på kobber, sink og gull og representerer en underordnet mineraliserings-type dannet ved remobilisering under deformasjonen. Den mineraliserte grafittfyllitten er også noe anriket Cu, Zn og Au i tillegg til Mo, As, Pb og Ag. Vulkanitten inneholder disseminert sulfider.

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

LS91036 Bedrock

Sampler: Størseth, L.R.

Comment: Chalcopyrite grains in quartz veins.

No. of registrated element analyses = 1

LS91037 Bedrock

Sampler: Størseth, L.R.

Comment: Pyrite-pyrrhotite mineralization in quartz veins.

No. of registrated element analyses = 1

LS91038 Bedrock

Sampler: Størseth, L.R.

Comment: Pyrrhotite in graphite schist.

No. of registrated element analyses = 1

LS91039 Bedrock

Sampler: Størseth, L.R.

Comment: Pyrrhotite-pyrite mineralisation in graphite schist.

No. of registrated element analyses = 1

LS91040 Bedrock

Sampler: Størseth, L.R.

Comment: Weak pyrrhotite dissemination in mica schist.

No. of registrated element analyses = 1

LS91041 Bedrock

Sampler: Størseth, L.R.

Comment: Chalcopyrite-pyrite mineralisation in quartz vein.

No. of registrated element analyses = 1

LS91042 Bedrock

Sampler: Størseth, L.R.

Comment: Pyrrhotite ore, partly massive.

No. of registrated element analyses = 1

LS91043 Bedrock

Sampler: Størseth, L.R.

Comment: Pyrite-chalcopyrite mineralisation in very crushed (deformed?) rock.

No. of registrated element analyses = 1

1122 Bedrock

No. of registrated element analyses = 1

1123 Bedrock

No. of registrated element analyses = 1

1124 Bedrock

No. of registrated element analyses = 1

1125 Bedrock

No. of registrated element analyses = 1

1126 Bedrock

No. of registrated element analyses = 1

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

Analyse Results

from

Deposit Area 5042 - 008 Østnes

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#

LS91036 Bedrock 550 52 45 10 36 1.8 65.0

LS91037 Bedrock 63 47 60 8 38 .3 8.0

LS91038 Bedrock 176 124 6 30 114 .7 9.0

LS91039 Bedrock 181 326 100 37 171 .9 26.0

LS91040 Bedrock 220 274 3 39 98 1.5 11.0

LS91041 Bedrock 17378 33398 5465 69 48 72.4 4802.0

LS91042 Bedrock 322 563 104 44 211 1.4 44.0

LS91043 Bedrock 7191 17441 4725 71 76 49.8 525.0

1122 Bedrock 639 209 34 17 316 1.3 16.0

1123 Bedrock 379 68 34 29 318 1.3 11.0

1124 Bedrock 108 100 48 23 103 .2 12.0

1125 Bedrock 102 108 23 17 73 .1 10.0

1126 Bedrock 567 954 59 27 321 2.3 29.0

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

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

LS91036 7.0 22.0 12 .2 16 13.00 2 2 4.49

LS91037 1.0 3.0 5 .2 9 5.00 10 2 .70

LS91038 10.0 18.0 266 .2 22 10.00 2 2 5.60

LS91039 9.0 25.0 124 .6 20 13.00 2 2 8.73

LS91040 1.0 1.0 46 1.8 15 1.00 2 2 1.29

LS91041 1.0 3.0 1540 303.2 9 18.00 19 2 17.28

LS91042 13.0 26.0 230 2.3 15 24.00 4 2 13.96

LS91043 5.0 11.0 10958 153.2 11 279.00 30 6 13.81

1122 13.0 8.0 7 1.8 7 17.00 2 10 18.31

1123 20.0 26.0 2 .2 7 35.00 2 4 20.97

1124 8.0 9.0 2 .2 28 19.00 2 2 2.12

1125 6.0 10.0 2 .6 16 2.00 2 2 2.04

1126 10.0 9.0 7 4.4 6 24.00 5 11 21.67

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

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

LS91036 99 55 355 7.17 4.00 5.00 1 14.0 10.00

LS91037 5 17 379 3.27 1.00 5.00 3 3.0 5.00

LS91038 102 53 790 13.04 6.00 5.00 1 51.0 31.00

LS91039 105 26 756 13.43 5.00 5.00 1 19.0 15.00

LS91040 96 116 913 7.31 1.00 5.00 1 290.0 10.00

LS91041 32 57 176 18.47 1.00 5.00 6 12.0 2.00

LS91042 70 22 692 21.24 5.00 10.00 1 27.0 6.00

LS91043 49 47 406 19.66 3.00 5.00 1 8.0 6.00

1122 59 18 380 30.22 6.00 11.00 1 12.0 11.00

1123 82 22 365 25.08 8.00 10.00 1 8.0 13.00

1124 35 14 201 4.79 5.00 6.00 1 8.0 13.00

1125 44 17 281 6.45 5.00 5.00 1 12.0 12.00

1126 102 10 1046 34.50 6.00 12.00 1 22.0 7.00

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

Sample No. B*

LS91036 6

LS91037 4

LS91038 2

LS91039 5

LS91040 2

LS91041 6

LS91042 3

LS91043 3

1122 4

1123 2

1124 2

1125 6

1126 4

From - To	Activity	Comments
1970 - 1970	Sampling	Company/Institution :NGU
1991 - 1991	Sampling	Company/Institution :NGU
1996 - 1996	Inspection	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:	Leipikvatn Nappe
	Igneous complex:

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

Relationship	Rock	Origin
Host rock	Graphitic phyllite	Sedimentary Original rock :Argillaceous sediment
		Metamorphic facies :Greenschist
Wall rock	Greenstone	Extrusive Original rock :Basalt
		Metamorphic facies :Greenschist

Location:	Type:	Orientation(360 gr.):	Relation to min.:
Host rock	Hydrothermal vein	Strike/Dip :54 / 40	Syn-mineralisation ;...Effect :Controls
Host rock	Fold axis	Dir./Plunge :62 / 20	Post-mineralisation ;...Effect :Modifies

Sample No.	Sample Type	Cu*	Zn*	Pb*	Co*	Ni*	Ag*	Au#
LS91036	Bedrock	550	52	45	10	36	1.8	65.0
LS91037	Bedrock	63	47	60	8	38	.3	8.0
LS91038	Bedrock	176	124	6	30	114	.7	9.0
LS91039	Bedrock	181	326	100	37	171	.9	26.0
LS91040	Bedrock	220	274	3	39	98	1.5	11.0
LS91041	Bedrock	17378	33398	5465	69	48	72.4	4802.0
LS91042	Bedrock	322	563	104	44	211	1.4	44.0
LS91043	Bedrock	7191	17441	4725	71	76	49.8	525.0
1122	Bedrock	639	209	34	17	316	1.3	16.0
1123	Bedrock	379	68	34	29	318	1.3	11.0
1124	Bedrock	108	100	48	23	103	.2	12.0
1125	Bedrock	102	108	23	17	73	.1	10.0
1126	Bedrock	567	954	59	27	321	2.3	29.0

Sample No.	Pt#	Pd#	As*	Cd*	Ba*	Mo*	Sb*	Bi*	S%
LS91036	7.0	22.0	12	.2	16	13.00	2	2	4.49
LS91037	1.0	3.0	5	.2	9	5.00	10	2	.70
LS91038	10.0	18.0	266	.2	22	10.00	2	2	5.60
LS91039	9.0	25.0	124	.6	20	13.00	2	2	8.73
LS91040	1.0	1.0	46	1.8	15	1.00	2	2	1.29
LS91041	1.0	3.0	1540	303.2	9	18.00	19	2	17.28
LS91042	13.0	26.0	230	2.3	15	24.00	4	2	13.96
LS91043	5.0	11.0	10958	153.2	11	279.00	30	6	13.81
1122	13.0	8.0	7	1.8	7	17.00	2	10	18.31
1123	20.0	26.0	2	.2	7	35.00	2	4	20.97
1124	8.0	9.0	2	.2	28	19.00	2	2	2.12
1125	6.0	10.0	2	.6	16	2.00	2	2	2.04
1126	10.0	9.0	7	4.4	6	24.00	5	11	21.67

Sample No.	V*	Cr*	Mn*	Fe%	Th*	U*	W*	Sr*	La*
LS91036	99	55	355	7.17	4.00	5.00	1	14.0	10.00
LS91037	5	17	379	3.27	1.00	5.00	3	3.0	5.00
LS91038	102	53	790	13.04	6.00	5.00	1	51.0	31.00
LS91039	105	26	756	13.43	5.00	5.00	1	19.0	15.00
LS91040	96	116	913	7.31	1.00	5.00	1	290.0	10.00
LS91041	32	57	176	18.47	1.00	5.00	6	12.0	2.00
LS91042	70	22	692	21.24	5.00	10.00	1	27.0	6.00
LS91043	49	47	406	19.66	3.00	5.00	1	8.0	6.00
1122	59	18	380	30.22	6.00	11.00	1	12.0	11.00
1123	82	22	365	25.08	8.00	10.00	1	8.0	13.00
1124	35	14	201	4.79	5.00	6.00	1	8.0	13.00
1125	44	17	281	6.45	5.00	5.00	1	12.0	12.00
1126	102	10	1046	34.50	6.00	12.00	1	22.0	7.00