Fact Sheet for <b>Occurence 5026

					Norsk versjon
	THE ORE DATABASE
	Occurence 5026 - 017 Hesjedalen
	(Object Id: 4410) (Last updated: 04.10.2018)

Location

County:

Trøndelag

Municipality:

Holtålen (5026)

Map 1:50000:

Haltdalen (1620-1)

Map 1:250000:

Røros

Coordinate system:

EU89-UTM Zone 32

East:

611219 m.

North:

6963992 m.

Longitude:

11.1803300

Latitude:

62.7892650

Show on map

Resource

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

Importance

Raw material meaning:

Not Assessed (reg. 18.02.2015)

Resources and production

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

Products

Element/product Crude ore grade or quality Reg. date

Cu 04.10.2018

Kis 04.10.2018

Operations

From - To Activity Comments

1750 - 1866 Regular production

1824 - 1831 Test mining Stolldrift

1850 - 1850 Regular production Company/Institution :L.J. Gjærsvold

1916 - 1918 Test mining Company/Institution :H. & F. Bachke

Utskeidet 297 tonn pyritt og 6 tonn kobberholdig kis.

Mineralization

Era: Paleozoic Period: Ordovician

Genesis: Sedex Form: Ruler

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

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

Strike/Dip: 190 / 36 Direction:

Plunge:

Stratigraphic classification of host rock

Era: Paleozoic Period: Ordovician

Province: Caledonides

Geotec.unit: Trondheim Nappe Complex

Tectonic complex: Meråkerdekket

Igneous complex:

Group: Dalsbygdgruppen Formation: Kjurudalsformasjonen

Mineralogy

Relationship Mineral Amount

Gangue mineral Quartz Major mineral (>10%)

Gangue mineral Chlorite Subordinate mineral (1-10%)

Gangue mineral Biotite Subordinate mineral (1-10%)

Gangue mineral Carbonate Accessory mineral (<1%)

Gangue mineral Garnet Accessory mineral (<1%)

Ore mineral Pyrite Major mineral (>10%)

Ore mineral Pyrrhotite Major mineral (>10%)

Ore mineral Chalcopyrite Subordinate mineral (1-10%)

Ore mineral Sphalerite Accessory mineral (<1%)

Lithology:

Relationship Rock Origin

Host rock Biotittskifer Sedimentary
Original rock :Siltstone

Metamorphic facies :Greenschist

Wall rock Kvartsitt Extrusive

Wall rock Kvartskeratofyr Extrusive
Original rock :Tuff

Metamorphic facies :Greenschist

Structures

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

Host rock Primary layering Strike/Dip :190 / 36 Syn-mineralisation ;...Effect :Controls

Information(s) in free text format

Free text

Det gamle dagbruddet er tildekket med løsmasser, men malm er blottet i <0.5 m mektige soner i en skjæring med kraftig rustdannelse. Hengen synes ikke å være blottet i området som ellers er fullstendig overdekket. Avstand fra skjæringen til Samvirkelaget er 150 m. I skjæringen dominerer en py-cp-malm med noe sl i enkelte prøver. Spredt omkring finnes også po-cp-malm, dog ikke funnet i fast fjell nå. Sistnevnte malmtype med metamorf tekstur. Finfordelt py i den kvartsittiske bergarten, mens en løsblokk med hydrotermal kvarts ikke viser mobiliserte malmmin. En sti fra Samvirkelaget leder til en tipp ved elva hvor mest malm finnes. Her er en gjenfylt stollinngang; tippområdet er dels planert. Det finnes to malmtyper: 1. py-po-cp-malm (massiv, middelskornet) 2. py-malm (grovere) med noe sl. I sistnevnte sees også en skifrig utvikling som sees i sammenheng med glimmerinnholdet i den kvartsdominerte malmen.

Bibliography:

From NGU's Reference Archive:

Aasgaard, Gunnar , 1927

Gruber og skjerp i kisdraget Øvre Guldal-Tydal.

;Norges geologiske undersøkelse;TIDSSKRIFTARTIKKEL;NGU; No.129;1-196 pages

Abstract:

The occurences described in this paper form a connection between th mining districts around Røros to the south and those around Meråker to the north. The occurences lie in mountain regions partly above the forest line. The list on page 12 contains the names of all known occurrences of whatever size within the district considered. Pl. I is a geological outline map of the district, compiled from maps in the Norwegian Geological Survey. In a geological summary on pages 18-27 it is shown that no pyrite occurrences of economic importance so far have been found in an eastern zone along the Swedish boundary where the rocks consist of hard schist with sparagmites, and igneous rocks. Neither have such occurrences been found in a zone of "Stuedalsskifer" and an other zone of "Gulaskifer" towards west, both indicated on the map. The occurrences of pyrite are chiefly found in connection with fine grained, light green or gravish, partly feldspar bearing schist and in connection with green schists, mostly fine grained hornblende schists. All these zones of schist gnereally strike north and dip west. The pyrite bearing schist lie on both sildes of a large zone of igneous rocks extending from Kjølifjell in the south over Hyllingen and Melshogna to Fangen in the Meråker district in the north.

Singsaas, P.; Brækken, H. , 1949

Geofysisk undersøkelse 1. Hessdalen Grube 2. Storvoll Grube 3. Rogn- gruben 4. From-gruben 5. Harsjø Grube Vest.

;Norges geologiske undersøkelse;FAGRAPPORT;NGU-rapport; No.63;41 pages

Abstract:

Formålet med undersøkelsene var å fastslå utstrekningen av de kjente malmforekomstene i grubene, samt å påvise eventuelt ukjente malmer i tilstøtende områder. Arealene av de enkelte målefeltene er: Hessdalen Grube 2,1 km2, Storvoll Grube 2,1 km2, Rogn-gruben 0,4 km2, From-gruben o,5 km2 og Harsjø Grube Vest 1,8 km2. Det ble utført el.magn. kond. målinger (Turam). Ved de betydeligste av de gamle gruber: Hessdalen Grube, Storvoll Grube og Harsjø Grube Vest har målingene vist at det opptrer tildels utstrakte, sterkt ledende soner som fortjener nøyere undersøkelser. Ved Rogn-gruben og Frogn-gruben er indikasjonsbildet vesentlig anderledes. Her ble det ikke observert indikasjoner på sammenhengende soner av større feltutstrekning, og indikasjonene på selve forekomstene er svake. Bortsett fra Harsjø Grube Vest er alle de undersøkte gruber beskrevet av G. Aasgård i NGU's publikasjon nr. 129 "Gruber og Skjerp i kisdraget Øvre Gauldal - Tydal.

Fieldsamples

Sample No. Sample type Miscellanrous

ST0208.01 Block

Sampler: Størseth, L.R./...Stored: Løkken

Comment: Stripet, disseminert py-malm i foldet glimmerskifer. Fra dagskjæringen fra den nå gjenfylte hovedgruven.

ST0208.02 Bedrock

Sampler: Størseth, L.R./...Stored: Løkken

Comment: Semimassiv, båndet malm i klorittskifer fra dagskjæringen.

ST0208.03 Block

Sampler: Størseth, L.R./...Stored: Løkken

Comment: Cp-po-mineralisering rundt kvartsøyne i gl.skiferen.

ST0208.04 Bedrock

Sampler: Størseth, L.R./...Stored: Løkken

Comment: Semimassiv py-cp-sl-malm fra fast fjell v/hovedgruven.

ST0208.05 Dump

Sampler: Størseth, L.R./...Stored: Løkken

Comment: Massiv py-po-malm fra hovedstollinngangen ved ved elva.

ST0208.06 Dump

Sampler: Størseth, L.R./...Stored: Løkken

Comment: Stripet py-sl-massivmalm fra tipp ved hovedstollen.

ST0208.07 Dump

Sampler: Størseth, L.R./...Stored: Løkken

Comment: Massiv, middelsk. py-po-(cp)-malm fra tipp ved hovedstollen.

Name of Locality: Grunnstollen

(Object Id: 37236 17,01,00)

Location

County: Trøndelag Municipality: Holtålen (5026)

Map 1:50000: Haltdalen (1620-1) Map 1:250000: Røros

Coordinate system: EU89-UTM Zone 32

East: 611046 m. North: 6963969 m.

Longitude: 11.1769260 Latitude: 62.7891080

Show on map

Resource

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

Element(s): Kis Cu Zn

Resources and production

Activity: Mining Reserves:

Operating method: Open pit and underground mining Historical production:

Fieldsamples

Sample No. Sample type Miscellanrous

JS-G1910 Dump

Sampler: J.S. Sandstad/...Stored: Løkken/...Size(kg): 2

Comment: Massive pyrite ore, medium grained

No. of registrated element analyses = 1

JS-G1911 Dump

Sampler: J.S. Sandstad/...Stored: Løkken/...Size(kg): 2

Comment: Massive sphalerite-pyrite ore, fine grained

No. of registrated element analyses = 1

JS-G1912 Dump

Sampler: J.S. Sandstad/...Stored: Løkken/...Size(kg): 2

Comment: Massive pyrite-chalcopyrite-sphalerite ore

No. of registrated element analyses = 1

JS-G1913 Dump

Sampler: J.S. Sandstad/...Stored: Løkken/...Size(kg): 2

Comment: Massive pyrite-pyrrhotite-sphalerite+chalcopyrite ore

No. of registrated element analyses = 1

JS-G1914 Dump

Sampler: J.S. Sandstad/...Stored: Løkken/...Size(kg): 2

Comment: Semi-massive sphalerite, some weathered

No. of registrated element analyses = 1

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

Analyse Results

from

Deposit Area 5026 - 017 Hesjedalen

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#

JS-G1910 Dump 9940 24200 1245 546 65 8.0 30.0

JS-G1911 Dump 2100 8750 683 104 45 5.4 8.0

JS-G1912 Dump 18450 40300 2400 577 16 18.9 90.0

JS-G1913 Dump 25100 35400 1965 613 28 19.5 93.0

JS-G1914 Dump 5100 20300 1375 112 254 12.6 18.0

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

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

JS-G1910 -5.0 3.0 79 65.5 40 19.15 4 1 32

JS-G1911 -5.0 3.0 62 23.6 -10 10.50 11 0 17

JS-G1912 -5.0 -1.0 121 97.0 40 20.90 6 1 67

JS-G1913 -5.0 -1.0 110 84.7 30 20.80 6 1 62

JS-G1914 -5.0 7.0 4 48.4 40 16.40 4 0 39

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

Sample No. Se* Ga* Ge* In* S% V* Cr* Mn* Fe%

JS-G1910 108.00 8.12 0.61 3.08 10.00 29 15 591 33.10

JS-G1911 35.00 6.51 0.36 1.38 10.00 24 9 712 22.40

JS-G1912 128.00 7.86 0.61 4.08 10.00 23 13 374 32.40

JS-G1913 153.00 7.54 0.42 3.56 10.00 20 9 444 36.00

JS-G1914 42.00 6.30 0.50 1.57 10.00 32 14 606 33.40

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

Sample No. Th* U* W* Rb* Sr* Y* Zr* Nb* Ta*

JS-G1910 1.34 0.90 0 8.4 19.0 8.4 10 0.50 0.05

JS-G1911 0.47 0.30 0 0.8 17.5 3.4 3 0.10 -0.05

JS-G1912 0.61 0.40 0 7.7 6.6 4.3 7 0.90 0.06

JS-G1913 0.54 0.50 0 3.5 6.0 3.8 8 0.80 0.06

JS-G1914 1.26 0.80 0 7.6 26.4 5.7 8 0.30 -0.05

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

Sample No. Cs* La* Ce* Li* Be* Na* Mg* Al* P*

JS-G1910 0.40 4.20 9.21 6 0 0 1 1 160

JS-G1911 -0.05 2.60 4.67 1 0 0 0 0 130

JS-G1912 0.32 1.70 4.14 6 0 0 1 1 80

JS-G1913 0.23 1.70 3.81 7 0 0 1 1 80

JS-G1914 0.20 3.50 7.93 2 1 0 0 1 140

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

Sample No. K * Ca* Sc* Ti* Te* Hf* Re* Tl*

JS-G1910 0 1 2.90 0 2.09 0.30 6 2

JS-G1911 0 1 1.00 0 0.55 0.10 5 0

JS-G1912 0 1 2.50 0 2.98 0.20 6 4

JS-G1913 0 1 2.00 0 2.45 0.20 5 2

JS-G1914 0 1 2.60 0 1.31 0.20 14 1

Element/product	Crude ore grade or quality	Reg. date
Cu		04.10.2018
Kis		04.10.2018

From - To	Activity	Comments
1750 - 1866	Regular production
1824 - 1831	Test mining	Stolldrift
1850 - 1850	Regular production	Company/Institution :L.J. Gjærsvold
1916 - 1918	Test mining	Company/Institution :H. & F. Bachke
		Utskeidet 297 tonn pyritt og 6 tonn kobberholdig kis.

Era:	Paleozoic	Period:	Ordovician
Genesis:	Sedex	Form:	Ruler
Main texture:	Banded	Min. distribution:	Massive (>50 % ore minerals)

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

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

Relationship	Rock	Origin
Host rock	Biotittskifer	Sedimentary Original rock :Siltstone
		Metamorphic facies :Greenschist
Wall rock	Kvartsitt	Extrusive
Wall rock	Kvartskeratofyr	Extrusive Original rock :Tuff
		Metamorphic facies :Greenschist

	Location:	Type:	Orientation(360 gr.):	Relation to min.:
	Host rock	Primary layering	Strike/Dip :190 / 36	Syn-mineralisation ;...Effect :Controls

Sample No.	Sample Type	Cu*	Zn*	Pb*	Co*	Ni*	Ag*	Au#
JS-G1910	Dump	9940	24200	1245	546	65	8.0	30.0
JS-G1911	Dump	2100	8750	683	104	45	5.4	8.0
JS-G1912	Dump	18450	40300	2400	577	16	18.9	90.0
JS-G1913	Dump	25100	35400	1965	613	28	19.5	93.0
JS-G1914	Dump	5100	20300	1375	112	254	12.6	18.0

Sample No.	Pt#	Pd#	As*	Cd*	Ba*	Mo*	Sn*	Sb*	Bi*
JS-G1910	-5.0	3.0	79	65.5	40	19.15	4	1	32
JS-G1911	-5.0	3.0	62	23.6	-10	10.50	11	0	17
JS-G1912	-5.0	-1.0	121	97.0	40	20.90	6	1	67
JS-G1913	-5.0	-1.0	110	84.7	30	20.80	6	1	62
JS-G1914	-5.0	7.0	4	48.4	40	16.40	4	0	39

Sample No.	Se*	Ga*	Ge*	In*	S%	V*	Cr*	Mn*	Fe%
JS-G1910	108.00	8.12	0.61	3.08	10.00	29	15	591	33.10
JS-G1911	35.00	6.51	0.36	1.38	10.00	24	9	712	22.40
JS-G1912	128.00	7.86	0.61	4.08	10.00	23	13	374	32.40
JS-G1913	153.00	7.54	0.42	3.56	10.00	20	9	444	36.00
JS-G1914	42.00	6.30	0.50	1.57	10.00	32	14	606	33.40

Sample No.	Th*	U*	W*	Rb*	Sr*	Y*	Zr*	Nb*	Ta*
JS-G1910	1.34	0.90	0	8.4	19.0	8.4	10	0.50	0.05
JS-G1911	0.47	0.30	0	0.8	17.5	3.4	3	0.10	-0.05
JS-G1912	0.61	0.40	0	7.7	6.6	4.3	7	0.90	0.06
JS-G1913	0.54	0.50	0	3.5	6.0	3.8	8	0.80	0.06
JS-G1914	1.26	0.80	0	7.6	26.4	5.7	8	0.30	-0.05

Sample No.	K *	Ca*	Sc*	Ti*	Te*	Hf*	Re*	Tl*
JS-G1910	0	1	2.90	0	2.09	0.30	6	2
JS-G1911	0	1	1.00	0	0.55	0.10	5	0
JS-G1912	0	1	2.50	0	2.98	0.20	6	4
JS-G1913	0	1	2.00	0	2.45	0.20	5	2
JS-G1914	0	1	2.60	0	1.31	0.20	14	1