Norsk versjon
	THE ORE DATABASE
	Deposit Area 1644 - 024
	(Last updated 07.nov.2023)

Importance

Public:

Little Importance (reg. 18.02.2015)

Economical:

Minor interest

Operations

	From - To	Activity	Comments
	1917 - 1917	Test mining	Company/Institution :Jens M. Jensaas bergingeniør Haslum
			Røros Kobberverk hadde tidligere drevet en synk og flere røsker.
	1997 - 1997	Sampling	Company/Institution :NGU

Mineralization

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

Main grain size:

Fine grained (< 1 mm)

Main alteration:

Chloritisation

	Strike/Dip:	240 / 40	Direction:
			Plunge:

Stratigraphic classification of host rock

Era:

Paleozoic

Period:

Ordovician

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

Group:

Fundsjø

Formation:

Hersjø

Mineralogy

	Relationship	Mineral	Amount
	Gangue mineral	Amphibole	Major mineral (>10%)
	Gangue mineral	Chlorite	Major mineral (>10%)
	Gangue mineral	Quartz	Subordinate mineral (1-10%)
	Ore mineral	Pyrrhotite	Major mineral (>10%)
	Ore mineral	Chalcopyrite	Subordinate mineral (1-10%)

Lithology:

	Relationship	Rock	Origin
	Wall rock	Greenstone	Extrusive Original rock :Basalt
			Metamorphic facies :Greenschist

Structures

	Location:	Type:	Orientation(360 gr.):	Relation to min.:
	Wall rock	Fold axis	Dir./Plunge :240 / 20	Post-mineralisation ;...Effect :Modifies

Photo(s) from the Deposit area:

Photo no. 1 showing Gamle Folldal, hovedskjerp" Photo no. 2 showing Gamle Folldal, hovedskjerp"

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.

Fieldsamples

	Sample No.	Sample type	Miscellanrous
	ST0215.01	Dump	Sampler :Sandstad, J.S./...Stored :Løkken/...Size(kg) :2 Comment :po+cpy malm, finkornet, massiv, cpy agg./strenger, grønn matriks. No. of registrated element analyses = 1
	ST0215.02	Dump	Sampler :Sandstad, J.S./...Stored :Løkken/...Size(kg) :2 Comment :po-cpy malm, finkornet, massiv, cpy strenger, relativt cpy rik, få og små kvartsøyne. No. of registrated element analyses = 1
	ST0215.03	Dump	Sampler :Sandstad, J.S./...Stored :Løkken/...Size(kg) :2 Comment :po malm, finkornet, semi-massiv, båndet/flammestripet, amfibolbånd, spor av cpy. No. of registrated element analyses = 1
	399808	Dump	Sampler :MINDEX ASA No. of registrated element analyses = 1

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

Name of Sample point : Gamle Folldal

(Object Id : 1644,024,00,01)

---

Location

County :

Sør-Trøndelag (16)

Municipality :

Holtålen (1644)

Map 1:50000:

Ålen (1720-4)

Map 1:250000:

Røros

Marking point:

Longitude:

11.4757170

Latitude:

62.8606190

EU89-UTM Zone 32

(Coordinates IS confirmed)

X-coord:

625976 m.

Y-coord:

6972482 m.

Commodity

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

Photo(s) from the Deposit area:

Photo no. 1 showing Gamle Folldal, midtre skjerp"

Fieldsamples

	Sample No.	Sample type	Miscellanrous
	ST0215.04	Dump	Sampler :Sandstad, J.S./...Stored :Løkken/...Size(kg) :2 Comment :po+cpy malm, finkornet, semi-massiv, amfibolrik matriks- No. of registrated element analyses = 1

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

Name of Sample point : Gamle Folldal

(Object Id : 1644,024,00,02)

---

Location

County :

Sør-Trøndelag (16)

Municipality :

Holtålen (1644)

Map 1:50000:

Ålen (1720-4)

Map 1:250000:

Røros

Marking point:

Longitude:

11.4752020

Latitude:

62.8609650

EU89-UTM Zone 32

(Coordinates IS confirmed)

X-coord:

625948 m.

Y-coord:

6972520 m.

Commodity

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

Fieldsamples

	Sample No.	Sample type	Miscellanrous
	ST0215.05	Dump	Sampler :Sandstad, J.S./...Stored :Løkken/...Size(kg) :2 Comment :po, finkornet, massiv, kun spor av cpy. No. of registrated element analyses = 1

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

Name of Locality : Gamle Folldal II

(Object Id : 1644,024,01,00)

---

Location

County :

Sør-Trøndelag (16)

Municipality :

Holtålen (1644)

Map 1:50000:

Ålen (1720-4)

Map 1:250000:

Røros

Marking point:

Longitude:

11.4982120

Latitude:

62.8537330

EU89-UTM Zone 32

(Coordinates IS confirmed)

X-coord:

627150 m.

Y-coord:

6971759 m.

Commodity

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

Production

	Activity:	Pitting	Reserves:
	Prod. method:		Production:
	Prod. status:		Volume of dump:	6 m3

Mineralogy

	Relationship	Mineral	Amount
	Gangue mineral	Amphibole	Major mineral (>10%)
	Gangue mineral	Quartz	Subordinate mineral (1-10%)
	Ore mineral	Pyrrhotite	Major mineral (>10%)
	Ore mineral	Magnetite	Major mineral (>10%)
	Ore mineral	Chalcopyrite	Subordinate mineral (1-10%)

Structures

	Location:	Type:	Orientation(360 gr.):	Relation to min.:
	Wall rock	Foliation	Strike/Dip :269 / 65	Post-mineralisation ;...Effect :Modifies

Fieldsamples

	Sample No.	Sample type	Miscellanrous
	ST0215.06	Dump	Sampler :Sandstad, J.S./...Stored :Løkken/...Size(kg) :2 Comment :mt malm, finkornet, massiv, po aggregater og cpy strenger. No. of registrated element analyses = 1

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

Name of Sample point : Gamle Folldal II

(Object Id : 1644,024,01,01)

---

Location

County :

Sør-Trøndelag (16)

Municipality :

Holtålen (1644)

Map 1:50000:

Ålen (1720-4)

Map 1:250000:

Røros

Marking point:

Longitude:

11.4997040

Latitude:

62.8540430

EU89-UTM Zone 32

(Coordinates IS confirmed)

X-coord:

627224 m.

Y-coord:

6971797 m.

Commodity

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

Fieldsamples

	Sample No.	Sample type	Miscellanrous
	ST0215.07	Dump	Sampler :Sandstad, J.S./...Stored :Løkken/...Size(kg) :2 Comment :po malm, finkornet, semi-massiv/båndet, amfibolrik matriks, spor av cpy. No. of registrated element analyses = 1

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

---

Analyse Results

from

Deposit Area 1644 - 024 Gamle Folldal

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#
ST0215.01	Dump	6923	25	-3	446	128	1.0	120.0
ST0215.02	Dump	7617	40	-3	473	133	1.1	98.0
ST0215.03	Dump	3329	34	-3	237	67	.8	22.0
ST0215.04	Dump	2852	9	-3	273	173	.4	20.0
ST0215.05	Dump	1519	5	-3	865	215	.4	45.0
ST0215.06	Dump	1294	21	-3	258	173	.5	856.0
ST0215.07	Dump	904	5	4	110	94	.3	14.0
399808	Dump	6055	62	25	510	140	1.6	81.0

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

Sample No.	Pt#	Pd#	As*	Cd*	Ba*	Mo*	Sb*	Bi*	S%
ST0215.01	-1.0	1.0	-2	-.2	2	-1.00	-3	3	22.65
ST0215.02	2.0	1.0	-2	-.2	4	-1.00	4	-3	20.85
ST0215.03	4.0	-1.0	-2	-.2	7	-1.00	-3	5	10.26
ST0215.04	1.0	1.0	-2	-.2	9	-1.00	-3	-3	13.11
ST0215.05	8.0	8.0	-2	-.2	3	-1.00	-3	-3	25.32
ST0215.06	2.0	1.0	-2	-.2	3	1.00	-3	25	4.59
ST0215.07	1.0	-1.0	-2	-.2	4	-1.00	-3	-3	8.40
399808			3	.1	1	8.00	3	3

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

Sample No.	V*	Cr*	Mn*	Fe%	Th*	U*	W*	Sr*	La*
ST0215.01	3	3	57	33.33	5.00	-8.00	-2	3.0	27.00
ST0215.02	4	13	90	31.34	4.00	-8.00	-2	3.0	56.00
ST0215.03	9	8	243	18.68	7.00	-8.00	-2	6.0	21.00
ST0215.04	8	3	231	18.03	3.00	-8.00	-2	4.0	29.00
ST0215.05	4	4	151	34.52	4.00	-8.00	-2	1.0	3.00
ST0215.06	19	3	360	38.97	4.00	-8.00	-2	1.0	1.00
ST0215.07	9	23	488	11.78	2.00	-8.00	-2	2.0	-1.00
399808	1	21	31	10.00				2.0	0.50

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

Sample No.	B*	Ti*
ST0215.01	-3
ST0215.02	-3
ST0215.03	-3
ST0215.04	-3
ST0215.05	4
ST0215.06	-3
ST0215.07	-3
399808		30

---

The fact sheet was created on 19.05.2024

Questions or comments regarding the fact sheet can be emailed to: ressursdatabaser@ngu.no

Copyright © 2024 Geological Survey of Norway