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THE ORE DATABASE
Occurence 5026 - 008 Syaosen
(Object Id: 4400)
(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: 630826 m. North: 6966775 m.
Longitude: 11.5664600 Latitude: 62.8077390
Show on map
Resource
Resource Type: Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) Resource Subtype: Copper
Element(s): Cu
Importance
Raw material meaning: Not Assessed (reg. 18.02.2015)

Resources and production
Activity: Test mining Reserves:
Operating method: Underground mining 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: Disseminated (<20 % ore minerals)
Main grain size: Fine grained (< 1 mm) Main alteration: Chloritisation
Strike/Dip: Direction: 125
Plunge: 15
Stratigraphic classification of host rock
Era: Paleozoic Period: Ordovician
Province: Caledonides
Geotec.unit: Røros Nappe Complex
Tectonic complex: Essandsjø Nappe
Igneous complex:
Group: Aursund Formation: Stugusjø

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

Lithology:
Relationship Rock Origin
Wall rock biotite-quartz schist Sedimentary
Original rock :Siltstone
Metamorphic facies :Greenschist

Structures
Location: Type: Orientation(360 gr.): Relation to min.:
Host rock Crenulation cleavage Strike/Dip :302 / 50 Post-mineralisation ;...Effect :Modifies
Wall rock Schistosity Strike/Dip :106 / 15 Post-mineralisation ;...Effect :None

Information(s) in free text format
Free text
Forekomsten består av fire mindre skjerp og synker som ligger vest for elva Sya, omtrent på samme høyde i terrenget like over tregrensen i Skarvbekklia i nordskråningen av Skarvskaftet og Nesjøskarven. Alle skjerpene ligger like nord for en markert skrent i terrenget. De var skjerpet tidlig på 1900-tallet og mindre prøvedrift på kobberkis i kvartsgang ble gjort av Røros Kobberverk (Aasgaard 1927). Hovedforekomsten er også kallt Søosen III og består av en vannfyllt skråsynk med sidevegger 3 x 6 m. En falleferdig brakke står igjen ved synken og rester etter skinnegang ligger utover tippen som har volum på omtrent 150 m3. Sulfidsonen kan sees i NØ-veggen i synken. Den er ca. 0,5 m mektig og består av kobberkis-magnetkis i uregelmessige årer og aggregater og er gjerne tilknyttet kvartslinse sterkt skifrig kloritt-biotitt rik bergart som også fører noe granat og amfibol.

Photo(s) from the Deposit area:
Photo no. 1 showing Synken i Syaosen"

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.

Rui, Ingolf J.; Bakke, Inge , 1975
Stratabound sulphide mineralization in the Kjøli area, Røros district, Norwegian Caledonides.
;Norsk geologisk forening;TIDSSKRIFTARTIKKEL;Norsk geologisk tidsskrift; No.55 (1);51-75 pages
Abstract:
Two important sulphide ore-bearing formations have been recognized in the Cambro-Silurian succession of the Røros district. One is composed of submarine greenstones and quartz keratophyres (the Hersjø Formation). The other one, which is studied here, consists of a heterogeneous series of banded meta-argillites and meta-greywackes with subordinate thin green interlayers of probable volcanogenic origin (the Røsjø Formation). These two formations are embedded in a thick succession of various clastic sedimentary rocks which have undergone metamorphism and folding during the Silurian orogeny. The numerous sulphide deposits which occur in the Kjøli area are largely confined to the Røsjø Formation. The sulphide bodies are chiefly composed of massive pyrite and/or pyrrhotite showing variable chalcopyrite and sphalerite grades. The massive sulphides often occur as thin, extensive sheets, locally as irregular, small lenses which rarely exceed one metre in thickness. It is probable that the sulphides have been precipitated primarily on the sea-floor, but there is no clear evidence of a volcanogenic origin. Local discordant relationships between the massive sulphides and the wall rocks are ascribed to metamorphic mobilization of the sulphides. The thicker sulphide lenses may themselves represent mobilized portions of thinner sulphide-rich units.

Fieldsamples
Sample No. Sample type Miscellanrous
ST0197.01 Dump
Sampler: Sandstad, J.S./...Stored: Løkken/...Size(kg): 2
Comment: cpy strenger/årenettverk, rik malm, i kloritt-kvarts+granat+amfibol bergart.
No. of registrated element analyses = 1
ST0197.02 Dump
Sampler: Sandstad, J.S./...Stored: Løkken/...Size(kg): 2
Comment: cpy+po min.agg./strenger i/langs kvarts-øyne i klorittrik bergart.
No. of registrated element analyses = 1
400034 Dump
Sampler: MINDEX ASA
No. of registrated element analyses = 1
400035 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: Syaosen Midtre
(Object Id: 9978 8,01,00)
Location
County: Trøndelag Municipality: Holtålen (5026)
Map 1:50000: Ålen (1720-4) Map 1:250000: Røros
Coordinate system: EU89-UTM Zone 32
East: 630527 m. North: 6966836 m.
Longitude: 11.5606530 Latitude: 62.8083950
Show on map
Resource
Resource Type: Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) Resource Subtype: Copper
Element(s): Cu
Resources and production
Activity: Pitting Reserves:
Operating method: Historical production:


Information(s) in free text format
Free text
Syaosen Midtre (Søosen II) ligger ca. 300 m vest for hoveskjerpet og er en 1-2 m dyp, vannfyllt grop. Bløt, klorittrik skifer dominerer. Malmsonen er ikke blottet, men på tippen sees tilsvarende sulfidmineralisering som i hovedskjerpet. Kobberkis aggregater og strenger, gjerne i og rundt kvartslinser i klorittrik skifer.

Photo(s) from the Deposit area:
Photo no. 1 showing Søosen II"

Fieldsamples
Sample No. Sample type Miscellanrous
ST0197.03 Dump
Sampler: Sandstad, J.S./...Stored: Løkken/...Size(kg): 2
Comment: cpy diss./agg. i/langs grovk. kvartslinser i klorittrik bergart.
No. of registrated element analyses = 1
ST0197.04 Dump
Sampler: Sandstad, J.S./...Stored: Løkken/...Size(kg): 2
Comment: cpy agg./strenger/diss. i sterkt foldet kl-skifer
No. of registrated element analyses = 1
400036 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: Syaosen Vest
(Object Id: 9979 8,02,00)
Location
County: Trøndelag Municipality: Holtålen (5026)
Map 1:50000: Ålen (1720-4) Map 1:250000: Røros
Coordinate system: EU89-UTM Zone 32
East: 630074 m. North: 6966877 m.
Longitude: 11.5518040 Latitude: 62.8089260
Show on map
Resource
Resource Type: Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) Resource Subtype: Copper
Element(s): Cu
Resources and production
Activity: Pitting Reserves:
Operating method: Historical production:


Information(s) in free text format
Free text
Syaosen Vest (Søosen I) er et lite, gjengrodd skjerp vest for av en liten bekk. Det er svært overdekket i dette området. Vertsbergarten er mindre klorittrik enn i hovedskjerpet og kan karakteriseres som sandstein. Det er skjerpet på en trolig 20-30 cm mektig, grovkornet kvartsgang med aggregater og strenger av kobberkis. Noe kobberkis finnes også i skifrig sideberg til denne.

Fieldsamples
Sample No. Sample type Miscellanrous
ST0197.05 Dump
Sampler: Sandstad, J.S./...Stored: Løkken/...Size(kg): 2
Comment: cpy diss./strenger. i grovk. kvarts m/klorittrik sidestein
No. of registrated element analyses = 1
ST0197.06 Dump
Sampler: Sandstad, J.S./...Stored: Løkken/...Size(kg): 2
Comment: cpy strenger/diss. i kl-bio skifer m/kv-linser
No. of registrated element analyses = 1
NB! All analyse values are shown at the end of the printout.:

Name of Locality: Syaosen Sør
(Object Id: 9980 8,03,00)
Location
County: Trøndelag Municipality: Holtålen (5026)
Map 1:50000: Ålen (1720-4) Map 1:250000: Røros
Coordinate system: EU89-UTM Zone 32
East: 631538 m. North: 6966429 m.
Longitude: 11.5801370 Latitude: 62.8043820
Show on map
Resource
Resource Type: Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) Resource Subtype: Copper
Element(s): Cu Zn
Resources and production
Activity: Pitting Reserves:
Operating method: Historical production:


Information(s) in free text format
Free text
Syaosen Sør (Syosen IV) ligger øst for en større bekk ca. 800 m SØ for hovedforekomsten. I en NØ-vendt brattskråning er det skutt ut i en lengde av 3 m og i en høyde opptil 3,5 m. Nederst i SV-veggen er det blottet en minst 10 cm mektig, kobberkisførende kvartsgang. Lengre oppe i veggen finnes en 20-40 cm bred sone med kobberkis-magnetkis strenger i klorittrik bergart med kvartslinser. Det er også utført mindre arbeid nordvest for skjerpet og antyder at sulfidmineraliseringen kan følges over minst 15 m. Vertsbergarten er en kalkførende biotittskifer med enkelte grovkornete amfibolnåler.

Photo(s) from the Deposit area:
Photo no. 1 showing Syaosen sør"
Photo no. 2 showing Sulfidsona i Syaosen sør"

Fieldsamples
Sample No. Sample type Miscellanrous
ST0197.07 Dump
Sampler: Sandstad, J.S./...Stored: Løkken/...Size(kg): 2
Comment: cpy-sl+po strenger/linser i grovk. klorittrik bergart.
No. of registrated element analyses = 1
ST0197.08 Dump
Sampler: Sandstad, J.S./...Stored: Løkken/...Size(kg): 2
Comment: cpy-sl+po strenger/linser i grovk. klorittrik bergart med kvartslinser.
No. of registrated element analyses = 1
400030 Dump
Sampler: MINDEX ASA
No. of registrated element analyses = 1
400031 Dump
Sampler: MINDEX ASA
No. of registrated element analyses = 1
400032 Dump
Sampler: MINDEX ASA
No. of registrated element analyses = 1
400033 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 - 008 Syaosen

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#
ST0197.01 Dump 51562 553 -3 59 55 10.3 69.0
ST0197.02 Dump 30248 469 -3 64 59 6.1 36.0
ST0197.03 Dump 6496 311 -3 26 40 1.8 20.0
ST0197.04 Dump 39754 1015 -3 61 63 11.0 51.0
ST0197.05 Dump 24417 115 8 6 5 7.5 325.0
ST0197.06 Dump 27063 192 7 21 26 9.3 263.0
ST0197.07 Dump 30795 18260 4 54 94 6.3 118.0
ST0197.08 Dump 31528 14751 -3 156 104 6.8 72.0
400030 Dump 11200 15700 13 122 82 2.8 56.0
400031 Dump 14700 7708 11 41 74 3.6 40.0
400032 Dump 14200 8131 13 32 38 3.2 37.0
400033 Dump 35500 9239 16 107 98 8.0 164.0
400034 Dump 36900 592 14 78 65 7.1 19.0
400035 Dump 33300 421 14 73 63 6.7 18.0
400036 Dump 22600 568 14 31 32 5.5 28.0
------------------
Sample No. Pt# Pd# As* Cd* Ba* Mo* Sb* Bi* S%
ST0197.01 -1.0 -1.0 2 3.7 65 -1.00 4 8 6.79
ST0197.02 2.0 13.0 -2 3.2 41 -1.00 -3 6 4.20
ST0197.03 -1.0 4.0 2 2.0 17 2.00 -3 8 1.13
ST0197.04 -1.0 8.0 -2 7.4 78 2.00 -3 30 5.59
ST0197.05 7.0 3.0 3 1.5 2 1.00 -3 -3 3.07
ST0197.06 6.0 12.0 -2 2.0 37 1.00 3 8 4.06
ST0197.07 21.0 4.0 -2 82.2 15 8.00 -3 39 8.68
ST0197.08 2.0 1.0 -2 66.9 10 11.00 -3 40 10.81
400030 16 55.6 7 18.00 3 47
400031 29 41.7 3 20.00 3 30
400032 10 42.7 6 15.00 3 17
400033 10 62.1 22 13.00 3 56
400034 9 2.7 44 2.00 3 14
400035 13 1.8 51 1.00 3 11
400036 8 2.8 40 7.00 3 10
------------------
Sample No. V* Cr* Mn* Fe% Th* U* W* Sr* La*
ST0197.01 86 72 440 14.39 7.00 -8.00 2 2.0 19.00
ST0197.02 85 76 438 12.74 8.00 -8.00 -2 3.0 13.00
ST0197.03 68 73 449 7.06 6.00 -8.00 -2 2.0 9.00
ST0197.04 84 60 582 12.68 6.00 -8.00 -2 2.0 7.00
ST0197.05 3 3 58 2.84 -2.00 -8.00 -2 2.0 1.00
ST0197.06 59 64 589 7.99 7.00 -8.00 2 2.0 7.00
ST0197.07 91 65 1237 14.66 10.00 -8.00 -2 4.0 8.00
ST0197.08 84 66 1168 16.75 9.00 -8.00 -2 3.0 8.00
400030 89 80 1342 10.00 2.0 5.00
400031 95 80 1365 10.00 2.0 1.00
400032 106 86 1708 10.00 2.0 4.00
400033 69 111 879 10.00 3.0 3.00
400034 82 99 502 10.00 2.0 10.00
400035 82 115 569 10.00 3.0 10.00
400036 74 135 652 10.00 2.0 5.00
------------------
Sample No. B* Ti*
ST0197.01 -3
ST0197.02 -3
ST0197.03 -3
ST0197.04 4
ST0197.05 -3
ST0197.06 -3
ST0197.07 -3
ST0197.08 -3
400030 120
400031 120
400032 120
400033 120
400034 240
400035 240
400036 300

The fact sheet was created on 24.04.2024
Questions or comments regarding the fact sheet can be emailed to:
ressursdatabaser@ngu.no
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