Fact Sheet for <b>Occurence 5058

					Norsk versjon
	THE ORE DATABASE
	Occurence 5058 - 003 Sekken II
	(Object Id: 4517) (Last updated: 10.06.1997)

Location

County:

Trøndelag

Municipality:

Åfjord (5058)

Map 1:50000:

Åfjord (1622-4)

Map 1:250000:

Trondheim

Coordinate system:

EU89-UTM Zone 32

East:

582079 m.

North:

7092922 m.

Longitude:

10.6754670

Latitude:

63.9536060

Show on map

Resource

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

Importance

Raw material meaning:

Not Assessed (reg. 18.02.2015)

Resources and production

	Activity:	Pitting	Reserves:
	Operating method:	Open pit and underground mining	Historical production:

Operations

From - To Activity Comments

1909 - 1909 Pitting

1953 - 1953 Geophysics

Mineralization

Era: Paleozoic Period: Ordovician

Genesis: Volcex Form: Lens

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

Main grain size: Medium grained (1-3 mm) Main alteration: Skarn formation

Strike/Dip: 265 / 75 Direction: 85

Plunge: 10

Stratigraphic classification of host rock

Era: Paleozoic Period: Ordovician

Province: Caledonides

Geotec.unit: Trondheim Nappe Complex

Tectonic complex: Øvre allokton

Igneous complex:

Group: Fosdalsgruppen Formation:

Mineralogy

Relationship Mineral Amount

Gangue mineral Amphibole Major mineral (>10%)

Gangue mineral Epidote Major mineral (>10%)

Gangue mineral Chlorite Subordinate mineral (1-10%)

Gangue mineral Calcite Subordinate mineral (1-10%)

Gangue mineral Plagioclase Subordinate mineral (1-10%)

Ore mineral Magnetite Major mineral (>10%)

Ore mineral Pyrite Major mineral (>10%)

Ore mineral Pyrrhotite Major mineral (>10%)

Ore mineral Chalcopyrite Subordinate mineral (1-10%)

Lithology:

Relationship Rock Origin

Host rock Amfibolitt Extrusive
Original rock :Basalt

Metamorphic facies :Greenschist

Wall rock Keratofyr Extrusive
Original rock :Tuff

Metamorphic facies :Greenschist

Wall rock Kalkspatmarmor Sedimentary
Original rock :Limestone

Metamorphic facies :Greenschist

Structures

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

Wall rock Fold axis Strike/Dip :85 / 10 Post-mineralisation ;...Effect :Modifies

Wall rock Foliation Strike/Dip :265 / 75 Post-mineralisation ;...Effect :Modifies

Information(s) in free text format

Free text

Mineraliseringen ble funnet og mutet i 1909. Stolldrift ble satt igang samme år. Bækgruben, 582160 7093130, er det i bekken drevet inn en 15 m lang stoll langs støket mot Ø. Stollen er buet og dreier mot NØ pga. at strøket bøyer rundt amfibolittlinsa. Til tross for buingen er stollen drevet i kalk. Den er påsatt i kontakten marmor/amfibolitt. Det er ganske rik (semimassiv) mineralisering, 10-20 cm mektig, av magnetkis, svovelkis, magnetitt og noe kobberkis langs kontakten (prøve 04). Også noe skarnifisering med grovkornet svovelkis (05) lokalt langs kontakten. Kalkspatmarmoren i liggen er båndet med noen dm-mektige lag av keratofyr som inneholder bånd av magnetkis og svovelkis (03) og pegmatitt-linser med sulfid-disseminasjon. Amfibolitt-linsa er ca 8 m mektig og fører svovelkis og magnetitt i årer og bånd (01 og 02). Det er røsket litt i amfibolitten i en skrent like ved stollen. Tippen er ca 10 m3. Tippmaterialet fra stollen finnes ikke på stedet.

Fieldsamples

Sample No. Sample type Miscellanrous

ST0321.01 Bedrock

Sampler: Wilberg, R.

Comment: Amfibolitt med årer av og bånd av py+mt.

No. of registrated element analyses = 1

ST0321.02 Bedrock

Sampler: Wilberg, R.

Comment: Amfibolitt med årer av og bånd av py+mt.

No. of registrated element analyses = 1

ST0321.03 Bedrock

Sampler: Wilberg, R.

Comment: Keratofyrlag me bånd av po+py i marmor fra amfibolittens ligg.

No. of registrated element analyses = 1

ST0321.04 Bedrock

Sampler: Wilberg, R.

Comment: Semimassiv po-py-mt-min. langs kont. amf./marmor.

No. of registrated element analyses = 1

ST0321.05 Bedrock

Sampler: Wilberg, R.

Comment: Skarnifisert amf. med grovk. py.

No. of registrated element analyses = 1

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

Analyse Results

from

Deposit Area 5058 - 003 Sekken II

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#

ST0321.01 Bedrock 243 26 8 48 24 .1 3.0

ST0321.02 Bedrock 209 35 9 29 14 .1 1.0

ST0321.03 Bedrock 37 29 2 12 14 .1 4.0

ST0321.04 Bedrock 3286 35 9 290 143 .8 7.0

ST0321.05 Bedrock 1904 19 2 242 147 .8 6.0

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

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

ST0321.01 5.0 8.0 2 .2 3 2.00 2 2 1.79

ST0321.02 8.0 1.0 2 1.2 3 1.00 2 2 1.06

ST0321.03 4.0 1.0 2 .2 17 2.00 2 2 1.47

ST0321.04 1.0 1.0 2 .2 4 2.00 2 23 14.03

ST0321.05 1.0 3.0 8 .2 7 2.00 2 8 10.40

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

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

ST0321.01 50 15 153 16.53 1.00 5.00 1 38.0 2.00

ST0321.02 62 9 271 26.96 1.00 5.00 1 38.0 2.00

ST0321.03 42 3 206 3.86 1.00 5.00 1 45.0 3.00

ST0321.04 7 2 86 18.20 2.00 5.00 1 39.0 4.00

ST0321.05 5 6 71 10.67 2.00 5.00 1 46.0 3.00

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

Sample No. B*

ST0321.01 2

ST0321.02 2

ST0321.03 5

ST0321.04 2

ST0321.05 2

From - To	Activity	Comments
1909 - 1909	Pitting
1953 - 1953	Geophysics

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

	Province:	Caledonides
	Geotec.unit:	Trondheim Nappe Complex
	Tectonic complex:	Øvre allokton
	Igneous complex:

Relationship	Mineral	Amount
Gangue mineral	Amphibole	Major mineral (>10%)
Gangue mineral	Epidote	Major mineral (>10%)
Gangue mineral	Chlorite	Subordinate mineral (1-10%)
Gangue mineral	Calcite	Subordinate mineral (1-10%)
Gangue mineral	Plagioclase	Subordinate mineral (1-10%)
Ore mineral	Magnetite	Major mineral (>10%)
Ore mineral	Pyrite	Major mineral (>10%)
Ore mineral	Pyrrhotite	Major mineral (>10%)
Ore mineral	Chalcopyrite	Subordinate mineral (1-10%)

Relationship	Rock	Origin
Host rock	Amfibolitt	Extrusive Original rock :Basalt
		Metamorphic facies :Greenschist
Wall rock	Keratofyr	Extrusive Original rock :Tuff
		Metamorphic facies :Greenschist
Wall rock	Kalkspatmarmor	Sedimentary Original rock :Limestone
		Metamorphic facies :Greenschist

Location:	Type:	Orientation(360 gr.):	Relation to min.:
Wall rock	Fold axis	Strike/Dip :85 / 10	Post-mineralisation ;...Effect :Modifies
Wall rock	Foliation	Strike/Dip :265 / 75	Post-mineralisation ;...Effect :Modifies

Sample No.	Sample Type	Cu*	Zn*	Pb*	Co*	Ni*	Ag*	Au#
ST0321.01	Bedrock	243	26	8	48	24	.1	3.0
ST0321.02	Bedrock	209	35	9	29	14	.1	1.0
ST0321.03	Bedrock	37	29	2	12	14	.1	4.0
ST0321.04	Bedrock	3286	35	9	290	143	.8	7.0
ST0321.05	Bedrock	1904	19	2	242	147	.8	6.0

Sample No.	Pt#	Pd#	As*	Cd*	Ba*	Mo*	Sb*	Bi*	S%
ST0321.01	5.0	8.0	2	.2	3	2.00	2	2	1.79
ST0321.02	8.0	1.0	2	1.2	3	1.00	2	2	1.06
ST0321.03	4.0	1.0	2	.2	17	2.00	2	2	1.47
ST0321.04	1.0	1.0	2	.2	4	2.00	2	23	14.03
ST0321.05	1.0	3.0	8	.2	7	2.00	2	8	10.40

Sample No.	V*	Cr*	Mn*	Fe%	Th*	U*	W*	Sr*	La*
ST0321.01	50	15	153	16.53	1.00	5.00	1	38.0	2.00
ST0321.02	62	9	271	26.96	1.00	5.00	1	38.0	2.00
ST0321.03	42	3	206	3.86	1.00	5.00	1	45.0	3.00
ST0321.04	7	2	86	18.20	2.00	5.00	1	39.0	4.00
ST0321.05	5	6	71	10.67	2.00	5.00	1	46.0	3.00