Fact Sheet for Deposit Area 1665

					Norsk versjon
	THE ORE DATABASE
	Deposit Area 1665 - 016
	(Last updated 06.mai.2002)

Name of Deposit Area : Stortjønna

(Object Id : 1665,016,00,00)

Location

County :

Sør-Trøndelag (16)

Municipality :

Tydal (1665)

Map 1:50000:

Essandsjøen (1721-2)

Map 1:250000:

Trondheim

Marking point:

Longitude:

11.7552570

Latitude:

63.0124010

EU89-UTM Zone 32

(Coordinates IS confirmed)

X-coord:

639469 m.

Y-coord:

6989959 m.

Commodity

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

Production

Activity:	Pitting	Reserves:
Prod. method:		Production:
Prod. status:		Volume of dump:	50 m3

Importance

Public: Little Importance (reg. 18.02.2015)

Economical: Minor interest , (Confirmed 06.mai.2002 by Jan Sverre Sandstad)

Operations

From - To Activity Comments

1999 - 1999 Sampling Company/Institution :NGU

Mineralization

Era: Paleozoic Period:

Dating: Method:

Genesis: Volcex Form: Lens

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

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

Strike/Dip: 64 / 45 Direction:

Plunge:

Stratigraphic classification of host rock

Era: Paleozoic Period:

Province: Caledonides

Geotec.unit: Remsklepp Nappe Complex

Tectonic complex: Hummelfjell Nappe

Igneous complex:

Group: Formation:

Mineralogy

Relationship Mineral Amount

Gangue mineral Quartz Major mineral (>10%)

Gangue mineral Amphibole Major mineral (>10%)

Gangue mineral Biotite Subordinate mineral (1-10%)

Ore mineral Pyrrhotite Major mineral (>10%)

Ore mineral Pyrite Major mineral (>10%)

Ore mineral Chalcopyrite Major mineral (>10%)

Ore mineral Sphalerite Accessory mineral (<1%)

Lithology:

Relationship Rock Origin

Wall rock Kvarts-amfibol gneis Sedimentary
Original rock :Greywacke

Metamorphic facies :Amphibolite

Structures

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

Wall rock Foliation Strike/Dip :68 / 45 Post-mineralisation ;...Effect :Modifies

Wall rock Mineral lineation Dir./Plunge :112 / 45 Post-mineralisation ;...Effect :None

Information(s) in free text format

Free text

Forekomsten ligger på en øst-vest orientert rygg, på nordøstsida av Stortjønna. En 2x5 m, vannfyllt skjæring med trolig mindre skråsynk er skutt ut på nordsida av ryggen. Gråbergstippen ligger vest for inngangen til skjæringa, mens mindre malmtipper finnes øst for skjæringa. I liggen finnes grå og massiv, finkornet kvarts-amfibol gneis med biotittlaminer. Den er dels båndet med tynne sulfidstriper og amfibolinnholdet varierer lokalt. Kvartsittisk gneis danner hengen til malmsona som i skjerpet opptrer som 10-40 cm brede linseformete rustsoner, mens massiv malm ikke er blottet. Ulike malmtyper finnes på tippen. Massiv magnetkis-kobberkis malm med noen bergartsfragmenter kan dels være kobber-rik (prøve .01), mens kobberkis-pyritt striper i fint båndet, kvarts-amfibol-biotitt gneis er mer vanlig (.02). Kobberkis-rik malm finnes også som tynne stikk og årer i finkornet kvartsittisk bergart (.03). Underordnet opptrer også sinkblende i 0.5 cm brede bånd.

Photo(s) from the Deposit area:

Photo no. 1 showing Stortjønna skjerp med tipp"

Photo no. 2 showing Stortjønna skjerp"

Fieldsamples

Sample No. Sample type Miscellanrous

ST0395.01 Dump

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

Comment :Massiv magnetkis-kobberkis, finkornet, Cu-rik, noen bergartsfragmenter og kvartsøyne

No. of registrated element analyses = 1

ST0395.02 Dump

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

Comment :Kobberkis+magnetkis i striper i kvarts-amfibol/biotitt gneis

No. of registrated element analyses = 1

ST0395.03 Dump

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

Comment :Kobberkis i årer og stikk i kvartsittisk bergart.

No. of registrated element analyses = 1

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

Analyse Results

from

Deposit Area 1665 - 016 Stortjønna

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#

ST0395.01 Dump 45387 1072 3 555 204 9.4 31.0

ST0395.02 Dump 16450 277 2 24 9 2.6 102.0

ST0395.03 Dump 58217 647 6 17 7 10.7 837.0

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

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

ST0395.01 .5 .5 1 4.4 3 4.00 8 31 15.99

ST0395.02 .5 .5 1 1.8 3 6.00 2 11 1.82

ST0395.03 .5 1.0 1 3.3 2 3.00 3 24 4.93

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

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

ST0395.01 5 6 219 22.40 6.00 4.00 1 16.0 13.00

ST0395.02 15 17 353 3.54 13.00 4.00 1 49.0 20.00

ST0395.03 9 13 226 6.86 5.00 4.00 4 20.0 8.00

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

Sample No. B*

ST0395.01 4

ST0395.02 2

ST0395.03 2

	From - To	Activity	Comments
	1999 - 1999	Sampling	Company/Institution :NGU

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

	Province:	Caledonides
	Geotec.unit:	Remsklepp Nappe Complex
	Tectonic complex:	Hummelfjell Nappe
	Igneous complex:

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

Relationship	Rock	Origin
Wall rock	Kvarts-amfibol gneis	Sedimentary Original rock :Greywacke
		Metamorphic facies :Amphibolite

Location:	Type:	Orientation(360 gr.):	Relation to min.:
Wall rock	Foliation	Strike/Dip :68 / 45	Post-mineralisation ;...Effect :Modifies
Wall rock	Mineral lineation	Dir./Plunge :112 / 45	Post-mineralisation ;...Effect :None

Sample No.	Sample Type	Cu*	Zn*	Pb*	Co*	Ni*	Ag*	Au#
ST0395.01	Dump	45387	1072	3	555	204	9.4	31.0
ST0395.02	Dump	16450	277	2	24	9	2.6	102.0
ST0395.03	Dump	58217	647	6	17	7	10.7	837.0

Sample No.	Pt#	Pd#	As*	Cd*	Ba*	Mo*	Sb*	Bi*	S%
ST0395.01	.5	.5	1	4.4	3	4.00	8	31	15.99
ST0395.02	.5	.5	1	1.8	3	6.00	2	11	1.82
ST0395.03	.5	1.0	1	3.3	2	3.00	3	24	4.93

Sample No.	V*	Cr*	Mn*	Fe%	Th*	U*	W*	Sr*	La*
ST0395.01	5	6	219	22.40	6.00	4.00	1	16.0	13.00
ST0395.02	15	17	353	3.54	13.00	4.00	1	49.0	20.00
ST0395.03	9	13	226	6.86	5.00	4.00	4	20.0	8.00