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THE ORE DATABASE
Occurence 5026 - 023 Holdsjøen
(Object Id: 4416)
(Last updated: 07.11.2023)
Location
County: Trøndelag Municipality: Holtålen (5026)
Map 1:50000: Ålen (1720-4) Map 1:250000: Røros
Coordinate system: EU89-UTM Zone 32
East: 624946 m. North: 6974391 m.
Longitude: 11.4569330 Latitude: 62.8780940
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Resource
Resource Type: Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) Resource Subtype: Copper
Element(s): Cu Zn
Importance
Raw material meaning: Not Assessed (reg. 18.02.2015)

Resources and production
Activity: Pitting Reserves:
Operating method: Historical production:


Operations
From - To Activity Comments
1997 - 1997 Sampling Company/Institution :NGU

Mineralization
Era: Paleozoic Period: Ordovician
Genesis: Volcex Form: Lens
Main texture: Structureless Min. distribution: Semi-massive (20-50 % ore minerals)
Main grain size: Medium grained (1-3 mm) Main alteration: Skarn formation
Strike/Dip: 60 / 90 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 Epidote Major mineral (>10%)
Gangue mineral Amphibole Major mineral (>10%)
Gangue mineral Calcite Subordinate mineral (1-10%)
Ore mineral Pyrrhotite Major mineral (>10%)
Ore mineral Chalcopyrite Major mineral (>10%)
Ore mineral Sphalerite Subordinate mineral (1-10%)

Lithology:
Relationship Rock Origin
Wall rock Amphibolite Extrusive
Original rock :Basalt
Metamorphic facies :Amphibolite

Structures
Location: Type: Orientation(360 gr.): Relation to min.:
Wall rock Foliation Strike/Dip :262 / 65 Post-mineralisation ;...Effect :Modifies

Photo(s) from the Deposit area:
Photo no. 1 showing Holdsjøen skjerp"

Fieldsamples
Sample No. Sample type Miscellanrous
ST0214.01 Dump
Sampler: Sandstad, J.S./...Stored: Løkken/...Size(kg): 2
Comment: po-cpy+sl min., finkornet, diss. og årer i epidot-pyroksen-kalkspat bergart/skarn.
No. of registrated element analyses = 1
ST0214.02 Dump
Sampler: Sandstad, J.S./...Stored: Løkken/...Size(kg): 2
Comment: po+cpy min, finkornet, semi-massiv po, grønn matriks.
No. of registrated element analyses = 1
399806 Dump
Sampler: MINDEX ASA
No. of registrated element analyses = 1
399807 Dump
Sampler: MINDEX ASA
No. of registrated element analyses = 1
NB! All analyse values are shown at the end of the printout.:

Analyse Results
from
Deposit Area 5026 - 023 Holdsjøen

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#
ST0214.01 Dump 11861 2598 3 170 140 2.9 143.0
ST0214.02 Dump 10733 2540 7 380 333 3.0 82.0
399806 Dump 6538 1944 31 335 234 2.2 46.0
399807 Dump 7350 9742 48 27 8 1.6 21.0
------------------
Sample No. Pt# Pd# As* Cd* Ba* Mo* Sb* Bi* S%
ST0214.01 2.0 1.0 -2 13.0 2 -1.00 -3 -3 5.86
ST0214.02 1.0 1.0 -2 11.8 4 -1.00 -3 5 15.83
399806 10 8.4 1 5.00 3 3
399807 3 50.9 1 0.50 3 3
------------------
Sample No. V* Cr* Mn* Fe% Th* U* W* Sr* La*
ST0214.01 1 1 700 11.34 -2.00 -8.00 -2 24.0 2.00
ST0214.02 2 1 339 24.56 3.00 -8.00 -2 5.0 -1.00
399806 1 19 426 25.50 10.0 0.50
399807 1 18 620 2.04 11.0 0.50
------------------
Sample No. B* Ti*
ST0214.01 -3
ST0214.02 -3
399806 30
399807 30

The fact sheet was created on 19.04.2024
Questions or comments regarding the fact sheet can be emailed to:
ressursdatabaser@ngu.no
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