Fact Sheet for Deposit Area 1939

					Norsk versjon
	THE ORE DATABASE
	Deposit Area 1939 - 003
	(Last updated 21.feb.2005)

Name of Deposit Area : Oteraksla

(Object Id : 1939,003,00,00)

Location

County :

Troms (19)

Municipality :

Storfjord (1939)

Map 1:50000:

Signaldalen (1633-3)

Map 1:250000:

Tromsø

Marking point:

Longitude:

19.9647310

Latitude:

69.2223530

EU89-UTM Zone 34

(Coordinates IS confirmed)

X-coord:

459015 m.

Y-coord:

7679502 m.

Commodity

	Main Type:	Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn)	Sub Type:	Zinc
			Element(s):	Zn Cu

Production

Activity:	Test mining	Reserves:
Prod. method:	Underground mining	Production:
Prod. status:	Disused, closed	Volume of dump:	200 m3

Importance

Public: Little Importance (reg. 18.02.2015)

Economical: Minor interest , (Confirmed 21.feb.2005 by Peter Ihlen)

Operations

From - To Activity Comments

1905 - 1905 Test mining

Mineralization

Era: Paleozoic Period:

Dating: Method:

Genesis: Sedex Form: Layer

Main texture: Min. distribution: Massive (>50 % ore minerals)

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

Strike/Dip: 270 / 10 Direction: 290

Plunge: 10

Stratigraphic classification of host rock

Era: Paleozoic Period:

Province:

Geotec.unit:

Tectonic complex: Senjadekket

Igneous complex:

Group: Formation:

Mineralogy

Relationship Mineral Amount

Gangue mineral Quartz Major mineral (>10%)

Gangue mineral Garnet Subordinate mineral (1-10%)

Gangue mineral Biotite Subordinate mineral (1-10%)

Ore mineral Pyrrhotite Major mineral (>10%)

Ore mineral Sphalerite Subordinate mineral (1-10%)

Ore mineral Chalcopyrite Subordinate mineral (1-10%)

Lithology:

Relationship Rock Origin

Wall rock glimmerskifer Sedimentary
Original rock :Greywacke

Metamorphic facies :Amphibolite

Structures

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

Host rock Fold axis Strike/Dip :290 / 10 Post-mineralisation ;...Effect :Modifies

Wall rock Foliation Strike/Dip :270 / 10 Post-mineralisation ;...Effect :None

Information(s) in free text format

Free text

Prøvedriften foregikk antagelig i 1905. Stollen er 20 m lang mot vest. Innslaget er innerst i en 8 m høy skjæring. Mineraliseringen, stratiform med skarpe kontakter mot sidestein, er finkornet massiv magnetkis-kobberkis-sinkblende-malm med opptil 3-4 cm store boller av kvarts (prøvene 01, 02 og 03). I nordveggen av skjæringen inn mot stollen er malmsonen ca. 40 cm mektig og flattliggende, ca. 270/10 (kompasset er avmagnetisert og virker ikke). Malmsonen synes å forsvinne helt i skjæringen 6-7 m øst for stollinnslaget. I sørveggen av skjæringen utvider den seg til ca. 1.5 m mektighet og drar seg oppover med fall på 70 grader (270/70). Det dreier seg om fortykning i en foldeombøyning, og ikke om primære trekk. Innover i stollen er malmsonen 1-1.5 m mektig, men er her iblandet endel glimmerskifer med sulfidstringere (04). Hengbergart er en svakt klorittisert glimmerskifer (05 fra kontakten), og liggbergart er glimmerskifer (06 fra kontakten). Begge har spor av sulfider, litt amfibol og granat. 20 m mot nord er en gjenfylt slepsynk (?). Ser såvidt noen cm av rusten glimmerskifer med sulfidstringere (magnetkis, kobberkis og sinkblende) i hengen av synken. Dette ligger tilsynelatende 5 m lavere i lagfølgen enn malmsonen i den øvre stollen. Det dreier seg sannsynligvis om det samme laget som er foldet. Smith (1905) angir analyse av en 3 tonns prøve av malmen: 0.9 % Cu og 2.8 % Zn.

Bibliography:

References not to be found in NGU's Reference Archive.:

Smith, H.H. 1905: Signaldalen Kopparförekomst. NGU-BA 2916.

Fieldsamples

Sample No. Sample type Miscellanrous

TR0138.01 Bedrock

Sampler :Wilberg, R./...Stored :Løkken

Comment :Fink. massiv po-cpy-sl-malm med kvartsøyne.

No. of registrated element analyses = 1

TR0138.02 Bedrock

Sampler :Wilberg, R./...Stored :Løkken

Comment :Fink. massiv po-cpy-sl-malm med kvartsøyne.

No. of registrated element analyses = 1

TR0138.03 Bedrock

Sampler :Wilberg, R./...Stored :Løkken

Comment :Fink. massiv po-cpy-sl-malm med kvartsøyne.

No. of registrated element analyses = 1

TR0138.04 Bedrock

Sampler :Wilberg, R./...Stored :Løkken

Comment :Glimmerskifer med po-cpy-sl-stringere.

No. of registrated element analyses = 1

TR0138.05 Bedrock

Sampler :Wilberg, R./...Stored :Løkken

Comment :Glimmerskifer fra hengkontakt.

No. of registrated element analyses = 1

TR0138.06 Bedrock

Sampler :Wilberg, R./...Stored :Løkken

Comment :Glimmerskifer fra liggkontakt.

No. of registrated element analyses = 1

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

Analyse Results

from

Deposit Area 1939 - 003 Oteraksla

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#

TR0138.01 Bedrock 11200 46800 -81 162 232 -16.2 50.0

TR0138.02 Bedrock 11200 39400 -81 107 150 -16.2 110.0

TR0138.03 Bedrock 15400 47100 -81 158 238 -16.2 48.0

TR0138.04 Bedrock 242 66 -5 2 3 -1.0 5.0

TR0138.05 Bedrock 352 883 12 9 45 -1.0 4.0

TR0138.06 Bedrock 1600 1770 -5 13 30 -1.0 1.0

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

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

TR0138.01 3.0 3.0 -20 122.0 168 -16.20 -20 -20 -20

TR0138.02 3.0 5.0 -20 104.0 49 -16.20 -20 -20 -20

TR0138.03 3.0 3.0 -20 121.0 77 -16.20 -20 -20 -20

TR0138.04 3.0 3.0 -20 -1.0 31 -1.00 -20 -20 -20

TR0138.05 3.0 3.0 -20 -1.0 501 2.12 -20 -20 -20

TR0138.06 3.0 3.0 -20 2.3 428 -1.00 -20 -20 -20

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

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

TR0138.01 14.20 71 -16 403 25.20 -30.00 -30.00 -32.4 -16.20

TR0138.02 13.40 32 -16 186 15.30 -30.00 -30.00 -32.4 -16.20

TR0138.03 14.70 60 -16 281 24.80 -30.00 -30.00 -32.4 -16.20

TR0138.04 2.97 5 5 40 .57 -30.00 -30.00 -2.0 -1.00

TR0138.05 .22 98 88 764 7.19 -30.00 -30.00 5.4 13.30

TR0138.06 .72 89 72 812 7.64 -30.00 -30.00 6.1 16.60

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

Sample No. B*

TR0138.01 -81

TR0138.02 -81

TR0138.03 -81

TR0138.04 -5

TR0138.05 -5

TR0138.06 -5

Era:	Paleozoic	Period:
Dating:		Method:
Genesis:	Sedex	Form:	Layer
Main texture:		Min. distribution:	Massive (>50 % ore minerals)

	Province:
	Geotec.unit:
	Tectonic complex:	Senjadekket
	Igneous complex:

Relationship	Mineral	Amount
Gangue mineral	Quartz	Major mineral (>10%)
Gangue mineral	Garnet	Subordinate mineral (1-10%)
Gangue mineral	Biotite	Subordinate mineral (1-10%)
Ore mineral	Pyrrhotite	Major mineral (>10%)
Ore mineral	Sphalerite	Subordinate mineral (1-10%)
Ore mineral	Chalcopyrite	Subordinate mineral (1-10%)

Relationship	Rock	Origin
Wall rock	glimmerskifer	Sedimentary Original rock :Greywacke
		Metamorphic facies :Amphibolite

Location:	Type:	Orientation(360 gr.):	Relation to min.:
Host rock	Fold axis	Strike/Dip :290 / 10	Post-mineralisation ;...Effect :Modifies
Wall rock	Foliation	Strike/Dip :270 / 10	Post-mineralisation ;...Effect :None

Sample No.	Sample Type	Cu*	Zn*	Pb*	Co*	Ni*	Ag*	Au#
TR0138.01	Bedrock	11200	46800	-81	162	232	-16.2	50.0
TR0138.02	Bedrock	11200	39400	-81	107	150	-16.2	110.0
TR0138.03	Bedrock	15400	47100	-81	158	238	-16.2	48.0
TR0138.04	Bedrock	242	66	-5	2	3	-1.0	5.0
TR0138.05	Bedrock	352	883	12	9	45	-1.0	4.0
TR0138.06	Bedrock	1600	1770	-5	13	30	-1.0	1.0

Sample No.	Pt#	Pd#	As*	Cd*	Ba*	Mo*	Sn*	Sb*	Bi*
TR0138.01	3.0	3.0	-20	122.0	168	-16.20	-20	-20	-20
TR0138.02	3.0	5.0	-20	104.0	49	-16.20	-20	-20	-20
TR0138.03	3.0	3.0	-20	121.0	77	-16.20	-20	-20	-20
TR0138.04	3.0	3.0	-20	-1.0	31	-1.00	-20	-20	-20
TR0138.05	3.0	3.0	-20	-1.0	501	2.12	-20	-20	-20
TR0138.06	3.0	3.0	-20	2.3	428	-1.00	-20	-20	-20

Sample No.	S%	V*	Cr*	Mn*	Fe%	Th*	U*	Sr*	La*
TR0138.01	14.20	71	-16	403	25.20	-30.00	-30.00	-32.4	-16.20
TR0138.02	13.40	32	-16	186	15.30	-30.00	-30.00	-32.4	-16.20
TR0138.03	14.70	60	-16	281	24.80	-30.00	-30.00	-32.4	-16.20
TR0138.04	2.97	5	5	40	.57	-30.00	-30.00	-2.0	-1.00
TR0138.05	.22	98	88	764	7.19	-30.00	-30.00	5.4	13.30
TR0138.06	.72	89	72	812	7.64	-30.00	-30.00	6.1	16.60