Fact Sheet for Deposit Area 1640

					Norsk versjon
	THE ORE DATABASE
	Deposit Area 1640 - 018
	(Last updated 27.okt.2023)

Name of Deposit Area : Rognåsen

(Object Id : 1640,018,00,00)

Location

County :

Sør-Trøndelag (16)

Municipality :

Røros (1640)

Map 1:50000:

Røros (1720-3)

Map 1:250000:

Røros

Marking point:

Longitude:

11.2619490

Latitude:

62.5777030

EU89-UTM Zone 32

(Coordinates IS confirmed)

X-coord:

616207 m.

Y-coord:

6940576 m.

Commodity

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

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 19.okt.2001 by Terje Bjerkgård)

Operations

From - To Activity Comments

Pitting

1998 - 1998 Sampling Company/Institution :MINDEX ASA

3 samples from dump

2020 - 2020 Geology Company/Institution :NGU

2020 - 2020 Sampling Company/Institution :NGU

Mineralization

Era: Paleozoic Period: Ordovician

Dating: Method:

Genesis: Hydrothermal vein Form: Irregular

Main texture: Structureless Min. distribution: Irregular (scattered)

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

Strike/Dip: Direction:

Plunge:

Stratigraphic classification of host rock

Era: Paleozoic Period: Ordovician

Province: Caledonides

Geotec.unit: Røros Nappe Complex

Tectonic complex:

Igneous complex:

Group: Aursund Group Formation: Røsjø Formation

Mineralogy

Relationship Mineral Amount

Gangue mineral Quartz Major mineral (>10%)

Gangue mineral Muscovite Subordinate mineral (1-10%)

Gangue mineral Chlorite Subordinate mineral (1-10%)

Gangue mineral Epidote Subordinate mineral (1-10%)

Gangue mineral Biotite Accessory mineral (<1%)

Gangue mineral Plagioclase Accessory mineral (<1%)

Ore mineral Sphalerite Major mineral (>10%)

Ore mineral Pyrrhotite Major mineral (>10%)

Ore mineral Chalcopyrite Major mineral (>10%)

Lithology:

Relationship Rock Origin

Wall rock metasandstone/psammite Sedimentary
Original rock :Sandstone

Metamorphic facies :Greenschist

Structures

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

Wall rock Foliation Strike/Dip :135 / 20 Post-mineralisation ;...Effect :Controls

Information(s) in free text format

Description

Rognåsenforekomsten er undersøkt med tre skjerp over en avstand på 60 m i nord-sør retning. Hovedskjerpet består av en vannfylt synk som er 4x3 m i omriss. Det er en ca. 50 kbm tipp ved skjerpet. Det er lite mineralisering å se i blotningene ved skjerpet. Det er 1-2 cm tynne årer av vesentlig kobberkis med litt sinkblende. Disse opptrer i en silisifisert sandstein. MINDEX ASA tok tre prøver i 1998 som viste 0.34-2.3 % Cu, 0.23-1.8 % Zn, <0.01 % Pb, 0.4-12 ppm Ag, 0.02-0.6 ppm Au.

Photo(s) from the Deposit area:

Photo no. 1 showing Rognåsen - hovedskjerpet"

Bibliography:

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

Wilberg, R. & Røsholt, B. 1998: Røros Zinc Project: Geological Investigations of stratiform sulphide deposits in the Røros-Meråker area, Part 1 (text), part 2 (maps and database). MINDEX ASA 1998, BV4651, BV4652, Directorate of Mining.

Fieldsamples

Sample No. Sample type Miscellanrous

ROGNÅSEN-1 Dump

Sampler :T. Bjerkgård

Comment :Thin veins of chalcopyrite and subordinate sphalerite in silicified sandstone

No. of registrated element analyses = 1

399714 Dump

Sampler :MINDEX ASA

No. of registrated element analyses = 1

399715 Dump

Sampler :MINDEX ASA

No. of registrated element analyses = 1

399716 Dump

Sampler :MINDEX ASA

No. of registrated element analyses = 1

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

Name of Locality : Skjerp 2

(Object Id : 1640,018,01,00)

Location

County : Sør-Trøndelag (16) Municipality : Røros (1640)

Map 1:50000: Røros (1720-3) Map 1:250000: Røros

Marking point: Longitude: 11.2619540 Latitude: 62.5775140

EU89-UTM Zone 32 (Coordinates IS confirmed)

X-coord: 616208 m. Y-coord: 6940554 m.

Commodity

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

Element(s): Cu Zn

Production

Activity: Pitting Reserves:

Prod. method: Production:

Prod. status: Volume of dump: 20 m3

Information(s) in free text format

Free text

Skjerp 2 ligger i strøkretningen 20 m sør for hovedskjerpet og består av en 4x3.5 m vannfylt synk/grop. Det er ca. 20 kbm tippmateriale rundt synken. Det er en tynn rustsone i nordkanten av skjerpet som inneholder tynne årer med kobberkis, sinkblende og magnetkis. Det er også en liten røsk 8 m sørøst for dette skjerpet. Her er det noen få tynne sulfidårer.

Photo(s) from the Deposit area:

Photo no. 1 showing Rognåsen - Skjerp 2"

Photo no. 2 showing Rongåsen - skjerp 2, mineralisering"

Fieldsamples

Sample No. Sample type Miscellanrous

ROGNÅSEN-2 Dump

Sampler :T. Bjerkgård

Comment :Thin veins of chalcopyrite, pyrrhotite and sphalerite in silicified sandstone

No. of registrated element analyses = 1

ROGNÅSEN-3 Dump

Sampler :T. Bjerkgård

Comment :Thin chalcopyrite-pyrrhotite-sphalerite veins in silicified sandstone

No. of registrated element analyses = 1

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

Name of Locality : Skjerp 3

(Object Id : 1640,018,02,00)

Location

County : Sør-Trøndelag (16) Municipality : Røros (1640)

Map 1:50000: Røros (1720-3) Map 1:250000: Røros

Marking point: Longitude: 11.2617920 Latitude: 62.5771670

EU89-UTM Zone 32 (Coordinates IS confirmed)

X-coord: 616202 m. Y-coord: 6940516 m.

Commodity

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

Element(s): Cu Zn

Production

Activity: Pitting Reserves:

Prod. method: Production:

Prod. status: Volume of dump: 8 m3

Information(s) in free text format

Free text

Skjerp 3 består av en liten røskegrop 60 m sør for hovedskjerpet langs strøket. Gropa er 3x2 m og inntil 1 m dyp. Lite med mineralisering, kun tynne stikk med litt kobberkis og sinkblende

Name of Locality : Skjerp 4

(Object Id : 1640,018,03,00)

Location

County : Sør-Trøndelag (16) Municipality : Røros (1640)

Map 1:50000: Røros (1720-3) Map 1:250000: Røros

Marking point: Longitude: 11.2589770 Latitude: 62.5754880

EU89-UTM Zone 32 (Coordinates IS confirmed)

X-coord: 616063 m. Y-coord: 6940324 m.

Commodity

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

Element(s): Cu Zn

Production

Activity: Pitting Reserves:

Prod. method: Production:

Prod. status: Volume of dump:

Operations

From - To Activity Comments

Pitting

1997 - 1997 Sampling Company/Institution :NGU

Mineralogy

Relationship Mineral Amount

Gangue mineral Quartz Major mineral (>10%)

Gangue mineral Muscovite Subordinate mineral (1-10%)

Gangue mineral Chlorite Subordinate mineral (1-10%)

Ore mineral Pyrrhotite Major mineral (>10%)

Ore mineral Chalcopyrite Subordinate mineral (1-10%)

Ore mineral Sphalerite Subordinate mineral (1-10%)

Lithology:

Relationship Rock Origin

Wall rock Semipelitic chl-musc schist Sedimentary
Original rock :Greywacke

Metamorphic facies :Greenschist

Structures

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

Wall rock Foliation Strike/Dip :206 / 42 Post-mineralisation ;...Effect :Controls

Information(s) in free text format

Free text

Skjerpet ligger i åpent landskap med lauvskog, dvergbjørk og einerkratt og er ikke lett å finne. Det består av en delvis gjengrodd røskegrøft 1.5 m bred og 9 m lang på tvers av strøket. Dybden er 0 til 1 m. Det er ingen tipphaug av betydning. Det er en totalt gjengrodd røskegrøft av tilsvarende dimensjoner 30 m sør for denne. Blotning i den førstnevnte grøften viser uregelmessige rustsoner og kvartslinser i semipelittisk skifer. Mineralisering består av meget svak impregnasjon av magnetkis med noe kobberkis i skiferen og uregelmessige, opptil cm-store aggregater av magnetkis, kobberkis og sinkblende i tilknytning til kvartslinsene. Skjerpet ligger nesten 300 m sørvest for hovedskjerpet.

Fieldsamples

Sample No. Sample type Miscellanrous

ST0094.01 Dump

Sampler :T. Bjerkgård/L. Furuhaug/...Stored :Løkken/...Size(kg) :1

Comment :Lenses of quartz with irregular aggregates of chalcopyrite, pyrrhotite and sphalerite in fine-grained chlorite-muscovite schist.

No. of registrated element analyses = 1

ST0094.02 Dump

Sampler :T. Bjerkgård/L. Furuhaug/...Stored :Løkken/...Size(kg) :1

Comment :Very weak impregnation of chalcopyrite and pyrrhotite in quartz-sericite schist

No. of registrated element analyses = 1

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

Analyse Results

from

Deposit Area 1640 - 018 Rognåsen

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#

ROGNÅSEN-1 Dump 22200 18300 29 26 7 16.5 126.0

ROGNÅSEN-2 Dump 49100 20600 15 222 106 34.1 565.0

ROGNÅSEN-3 Dump 29000 9790 13 195 101 21.0 617.0

ST0094.01 Dump 11795 9187 22 26 19 2.7 8.0

ST0094.02 Dump 2092 1817 34 16 35 .7 4.0

399714 Dump 5697 18000 21 25 17 1.2 30.0

399715 Dump 23000 13000 48 270 135 12.4 579.0

399716 Dump 3446 2392 35 13 24 .4 19.0

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

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

ROGNÅSEN-1 -5.0 -1.0 1 58.6 30 -1.00 2 -1 1

ROGNÅSEN-2 -5.0 -1.0 3 66.8 30 -1.00 2 -1 5

ROGNÅSEN-3 -5.0 -1.0 5 33.7 40 1.00 2 -1 2

ST0094.01 1.0 1.0 -2 26.0 58 -1.00 4 20

ST0094.02 2.0 1.0 -2 5.0 84 -1.00 -3

399714 130 52.1 5 6.00 3 3

399715 167 39.6 13 5.00 3 5

399716 103 7.2 15 5.00 3 3

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

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

ROGNÅSEN-1 28.00 10.00 -1.00 4.00 50 61 820 4.85

ROGNÅSEN-2 77.00 5.00 -1.00 4.00 28 34 788 14.20

ROGNÅSEN-3 51.00 9.00 -1.00 3.00 44 44 1010 10.60

ST0094.01 4.12 18 42 236 4.91

ST0094.02 1.97 43 77 662 8.25

399714 25 298 873 4.80

399715 9 246 438 15.30

399716 17 374 390 2.72

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

Sample No. Th* U* W* Sr* Nb* Ta* La* B* Li*

ROGNÅSEN-1 4.00 1.00 -1 5.00 -1.00 1

ROGNÅSEN-2 2.00 -1.00 -1 3.00 -1.00 1

ROGNÅSEN-3 4.00 1.00 -1 5.00 -1.00 2

ST0094.01 6.00 -8.00 -2 4.0 7.00 -3

ST0094.02 8.00 -8.00 -2 6.0 12.00 -3

399714 51.0 6.00

399715 14.0 1.00

399716 42.0 5.00

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

Sample No. P* Sc* Ti* Te*

ROGNÅSEN-1 240 6.00 1810 3.00

ROGNÅSEN-2 200 4.00 1210 22.00

ROGNÅSEN-3 290 6.00 1880 11.00

ST0094.01

ST0094.02

399714 899

399715 300

399716 600

From - To	Activity	Comments
	Pitting
1998 - 1998	Sampling	Company/Institution :MINDEX ASA
		3 samples from dump
2020 - 2020	Geology	Company/Institution :NGU
2020 - 2020	Sampling	Company/Institution :NGU

Era:	Paleozoic	Period:	Ordovician
Dating:		Method:
Genesis:	Hydrothermal vein	Form:	Irregular
Main texture:	Structureless	Min. distribution:	Irregular (scattered)

	Province:	Caledonides
	Geotec.unit:	Røros Nappe Complex
	Tectonic complex:
	Igneous complex:

Relationship	Mineral	Amount
Gangue mineral	Quartz	Major mineral (>10%)
Gangue mineral	Muscovite	Subordinate mineral (1-10%)
Gangue mineral	Chlorite	Subordinate mineral (1-10%)
Gangue mineral	Epidote	Subordinate mineral (1-10%)
Gangue mineral	Biotite	Accessory mineral (<1%)
Gangue mineral	Plagioclase	Accessory mineral (<1%)
Ore mineral	Sphalerite	Major mineral (>10%)
Ore mineral	Pyrrhotite	Major mineral (>10%)
Ore mineral	Chalcopyrite	Major mineral (>10%)

Relationship	Rock	Origin
Wall rock	metasandstone/psammite	Sedimentary Original rock :Sandstone
		Metamorphic facies :Greenschist

	Location:	Type:	Orientation(360 gr.):	Relation to min.:
	Wall rock	Foliation	Strike/Dip :135 / 20	Post-mineralisation ;...Effect :Controls

Sample No.	Sample Type	Cu*	Zn*	Pb*	Co*	Ni*	Ag*	Au#
ROGNÅSEN-1	Dump	22200	18300	29	26	7	16.5	126.0
ROGNÅSEN-2	Dump	49100	20600	15	222	106	34.1	565.0
ROGNÅSEN-3	Dump	29000	9790	13	195	101	21.0	617.0
ST0094.01	Dump	11795	9187	22	26	19	2.7	8.0
ST0094.02	Dump	2092	1817	34	16	35	.7	4.0
399714	Dump	5697	18000	21	25	17	1.2	30.0
399715	Dump	23000	13000	48	270	135	12.4	579.0
399716	Dump	3446	2392	35	13	24	.4	19.0

Sample No.	Pt#	Pd#	As*	Cd*	Ba*	Mo*	Sn*	Sb*	Bi*
ROGNÅSEN-1	-5.0	-1.0	1	58.6	30	-1.00	2	-1	1
ROGNÅSEN-2	-5.0	-1.0	3	66.8	30	-1.00	2	-1	5
ROGNÅSEN-3	-5.0	-1.0	5	33.7	40	1.00	2	-1	2
ST0094.01	1.0	1.0	-2	26.0	58	-1.00		4	20
ST0094.02	2.0	1.0	-2	5.0	84	-1.00			-3
399714			130	52.1	5	6.00		3	3
399715			167	39.6	13	5.00		3	5
399716			103	7.2	15	5.00		3	3

Sample No.	Se*	Ga*	Ge*	In*	S%	V*	Cr*	Mn*	Fe%
ROGNÅSEN-1	28.00	10.00	-1.00	4.00		50	61	820	4.85
ROGNÅSEN-2	77.00	5.00	-1.00	4.00		28	34	788	14.20
ROGNÅSEN-3	51.00	9.00	-1.00	3.00		44	44	1010	10.60
ST0094.01					4.12	18	42	236	4.91
ST0094.02					1.97	43	77	662	8.25
399714						25	298	873	4.80
399715						9	246	438	15.30
399716						17	374	390	2.72