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THE ORE DATABASE
Occurence 5035 - 013 Elvervollen
(Object Id: 45)
(Last updated: 05.07.2023)
Location
County: Trøndelag Municipality: Stjørdal (5035)
Map 1:50000: Stjørdal (1621-1) Map 1:250000: Trondheim
Coordinate system: EU89-UTM Zone 32
East: 606837 m. North: 7025520 m.
Longitude: 11.1345640 Latitude: 63.3424160
Show on map
Resource
Resource Type: Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) Resource Subtype: Arsenic
Element(s): As Au Kis
Importance
Raw material meaning: Little Importance (reg. 18.02.2015)

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


Operations
From - To Activity Comments
1989 - 1990 Inspection Company/Institution :NGU

Mineralization
Era: Paleozoic Period:
Genesis: Volcex Form: Irregular
Main texture: Min. distribution: Disseminated (<20 % ore minerals)
Main grain size: Medium grained (1-3 mm) Main alteration:
Strike/Dip: Direction:
Plunge:
Stratigraphic classification of host rock
Era: Paleozoic Period:
Province: Caledonides
Geotec.unit:
Tectonic complex: Gula Complex
Igneous complex:
Group: Formation:

Mineralogy
Relationship Mineral Amount
Gangue mineral Quartz Major mineral (>10%)
Gangue mineral Biotite Subordinate mineral (1-10%)
Ore mineral Pyrrhotite Major mineral (>10%)
Ore mineral Arsenopyrite Major mineral (>10%)
Ore mineral Pyrite Subordinate mineral (1-10%)

Lithology:
Relationship Rock Origin
Host rock Quartzite Sedimentary
Original rock :Exhalite
Metamorphic facies :Greenschist
Wall rock Mica schist Sedimentary
Original rock :Argillaceous sediment
Metamorphic facies :Greenschist

Structures
Location: Type: Orientation(360 gr.): Relation to min.:
Wall rock Foliation Strike/Dip :260 / 30 Post-mineralisation ;...Effect :Modifies

Information(s) in free text format
Free text
Elvervollen ligger i bunnen av en brattskråning ved en sidebekk til Elvervollbekken nord for Bakkvollvegen. Den er en skogsbilvei som går vestover fra Selbuskogen skisenter og er skiløypetrase om vinteren. Mineraliseringen består av disseminasjon av arsenkis og jernsulfider i en kvartsittisk bergart som er minst 1,5 m mektig. Anrikning av As kan indikere at mineraliseringen kan være av samme type som Røsbekken og Blomligruvene langs Gammelveien over Strandfjellet i Selbu. Det ble ikke funnet massiv sulfidmineralisering ved befaringen i 2020. Glimmerskifer ligger over og sør for kvartsitten, mens grønnstein dominerer oppover i bekkestrykene videre sørover. Det er dermed trolig at mineraliseringen ligger i kvartsitt som tilhører Gulakomplekset og ligger nær grensen til overliggende Størengrønnstein.

Bibliography:
From NGU's Reference Archive:
Torske, Tore , 1965
Geology of the Mostadmarka and Selbustrand area, Trøndelag.
;Norges geologiske undersøkelse;TIDSSKRIFTARTIKKEL;NGU; No.232;1-83 + ka pages
Abstract:
The bedrock of the area consists of metamorphic epiclastic, volcanic, and intrusive rocks of assumed Lower Ordovician age, assigned to, and lithologically matching the rocks of, the Røros, Støren and Lower Hovin Groups of the Trondheim Region. A detailed petrographic description of the rock varieties is given. The metamorphic grade of all rocks corresponds to the Greenschist Facies. - Small ore deposits occur in connection with the volcanic rocks. They comprise pyrite-pyrrhotite ores of the Leksdal Type, mixed pyrite-magnetite ores, and iron oxide ores. - Lithological variations of the sedimentary rocks is tentatively correlated with events during the early periods of the Caledonian Orogeny. - The volcanism within the area seems to have started with a phase of explosive activity, followed by extrusion (mostly submarine) of copious amounts of spilitic lavas; towards the end of the main period of volcanism a new episode of explosive activity has produced what is called the upper pyroclastic horizon, comprising rocks ranging from coarse volcanic breccia to finegrained tuffs. - The intrusive rocks consist mainly of saussurite gabbros and quartz keratophyres. The latter are thought to be intrusive rather than effusive, and evidence is offered to support this. In some places the character of pyroclastic material points to a quartz keratophyre parentage. Thus, quartz keratophyres may have occurred both as intrusive and volcanic rocks.

Fieldsamples
Sample No. Sample type Miscellanrous
Elvervollen-1 Bedrock
Sampler: J.S.Sandstad/...Stored: Løkken/...Size(kg): 2
Comment: Arsenopyrite-pyrite dissemination i quartzitic rock
No. of registrated element analyses = 1
Elvervollen-2 Dump
Sampler: J.S.Sandstad/...Stored: Løkken/...Size(kg): 2
Comment: Arsenopyrite-pyrite dissemination i quartzitic rock
No. of registrated element analyses = 1
851 Bedrock
No. of registrated element analyses = 1
852 Bedrock
No. of registrated element analyses = 1
853 Bedrock
No. of registrated element analyses = 1
854 Bedrock
No. of registrated element analyses = 1
855 Bedrock
No. of registrated element analyses = 1
856 Bedrock
No. of registrated element analyses = 1
857 Bedrock
No. of registrated element analyses = 1
858 Bedrock
No. of registrated element analyses = 1
859 Bedrock
No. of registrated element analyses = 1
860 Bedrock
No. of registrated element analyses = 1
861 Bedrock
No. of registrated element analyses = 1
862 Bedrock
No. of registrated element analyses = 1
863 Bedrock
No. of registrated element analyses = 1
NB! All analyse values are shown at the end of the printout.:

Name of Sample point: Prøvepunkt 1
(Object Id: 564 13,00,01)
Location
County: Trøndelag Municipality: Stjørdal (5035)
Map 1:50000: Stjørdal (1621-1) Map 1:250000: Trondheim
Coordinate system: EU89-UTM Zone 32
East: 607369 m. North: 7025442 m.
Longitude: 11.1451170 Latitude: 63.3415640
Show on map
Resource
Resource Type: Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) Resource Subtype: Arsenic
Element(s): As Au


Fieldsamples
Sample No. Sample type Miscellanrous
TG90110 Bedrock
Sampler: Grenne, T.
Comment: Po-cpy-diss./årer.
No. of registrated element analyses = 1
NB! All analyse values are shown at the end of the printout.:

Name of Sample point: Prøvepunkt 2
(Object Id: 565 13,00,02)
Location
County: Trøndelag Municipality: Stjørdal (5035)
Map 1:50000: Stjørdal (1621-1) Map 1:250000: Trondheim
Coordinate system: EU89-UTM Zone 32
East: 607346 m. North: 7025373 m.
Longitude: 11.1446270 Latitude: 63.3409540
Show on map
Resource
Resource Type: Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) Resource Subtype: Arsenic
Element(s): As Au


Information(s) in free text format
Free text
Semi-massiv til disseminert pyritt i kvartsrik bergart og grafittskifer med magnetkis ble prøvetatt fra en jernhatt i en veigrøftblotning langs Bakkvollvegen vel 500 m ØSØ for hovedforekomsten. De er ikke anriket på arsen eller andre basemetaller.

Fieldsamples
Sample No. Sample type Miscellanrous
Elvervollen-3 Bedrock
Sampler: J.S.Sandstad/...Stored: Løkken/...Size(kg): 2
Comment: Semi-massive and disseminated pyrite in quartz-rich rock
No. of registrated element analyses = 1
Elvervollen-4 Bedrock
Sampler: J.S.Sandstad/...Stored: Løkken/...Size(kg): 2
Comment: Pyrite dissemination in graphite-bearing schist
No. of registrated element analyses = 1
TG90111 Bedrock
Sampler: Grenne, T.
Comment: As-py-diss. i graf. kvartsitt.
No. of registrated element analyses = 1
TG90112 Bedrock
Sampler: Grenne, T.
Comment: Semimassiv po(?)-aspy i kvtst.
No. of registrated element analyses = 1
NB! All analyse values are shown at the end of the printout.:

Analyse Results
from
Deposit Area 5035 - 013 Elvervollen

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#
Elvervollen-1 Bedrock 72 102 11 4 28 .2 8.0
Elvervollen-2 Dump 123 20 30 5 38 .4 4.0
Elvervollen-3 Bedrock 1130 80 34 26 373 1.0 12.0
Elvervollen-4 Bedrock 1100 86 32 23 277 1.1 13.0
TG90110 Bedrock 1515 123 9 29 73 .8 12.0
TG90111 Bedrock 42 25 4 2 9 .5 948.0
TG90112 Bedrock 71 22 6 3 14 .5 282.0
851 Bedrock 133 726 72 27 71 .9 3.0
852 Bedrock 53 256 4 15 47 .2 1.0
853 Bedrock 53 15 2 9 33 .3 1.0
854 Bedrock 42 6 8 6 19 .3 22.0
855 Bedrock 44 19 2 10 31 .3 71.0
856 Bedrock 42 9 13 13 25 .2 115.0
857 Bedrock 59 31 8 6 26 .2 4.0
858 Bedrock 161 15 12 47 39 .4 410.0
859 Bedrock 48 9 6 4 17 .2 6.0
860 Bedrock 16 10 2 2 10 .1 4.0
861 Bedrock 240 22 16 143 90 .6 4.0
862 Bedrock 13 19 2 3 11 .1 18.0
863 Bedrock 44 2 3 3 13 .1 4.0
------------------
Sample No. Pt# Pd# Rh# As* Cd* Ba* Mo* Sn* Sb*
Elvervollen-1 -5.0 -1.0 2910 .3 10 4.57 -0 1
Elvervollen-2 -5.0 -1.0 1210 .1 40 16.60 0 0
Elvervollen-3 15.0 7.0 10 .5 50 73.10 1 3
Elvervollen-4 12.0 9.0 14 .5 50 80.40 1 3
TG90110 8.0 10.0 2.0 7 .7 31 7.00 3
TG90111 2.0 3.0 2.0 3979 .2 39 1.00 4
TG90112 2.0 2.0 2.0 128 .2 30 1.00 2
851 494 2.0 8 7.00 14
852 5 1.0 85 1.00 2
853 6 1.0 1 3.00 2
854 19745 1.0 6 4.00 4
855 62276 1.0 7 4.00 7
856 46191 1.0 1 7.00 6
857 128 1.0 16 3.00 3
858 99999 2.0 18 10.00 8
859 91 1.0 1 3.00 2
860 5564 1.0 2 20.00 2
861 494 1.0 13 16.00 7
862 11302 1.0 2 3.00 2
863 56 1.0 2 4.00 2
------------------
Sample No. Bi* Se* Ga* Ge* In* S% V* Cr* Mn*
Elvervollen-1 0 3.00 0.75 0.05 0.01 3.42 24 16 273
Elvervollen-2 0 4.00 1.46 -0.05 0.01 4.13 52 15 266
Elvervollen-3 20 25.00 11.50 0.20 0.04 10.00 535 89 325
Elvervollen-4 20 26.00 10.95 0.15 0.05 10.00 578 74 202
TG90110 2 2.74 63 32 377
TG90111 2 .15 22 10 200
TG90112 2 .12 40 10 189
851 6 31.00 12 3 219
852 2 1.00 71 46 1174
853 6 6.25 1 7 19
854 2 3.59 3 4 108
855 2 5.80 6 5 542
856 2 4.63 2 6 169
857 3 4.74 69 22 255
858 4 12.80 28 8 560
859 2 3.77 3 6 203
860 2 .61 2 7 784
861 4 19.20 45 7 218
862 2 .86 9 10 412
863 2 .90 2 8 78
------------------
Sample No. Fe% Th* U* W* Rb* Sr* Y* Zr* Nb*
Elvervollen-1 7.38 0.11 0.70 0 1.6 4.1 1.3 2 0.10
Elvervollen-2 6.86 0.19 1.50 0 4.3 3.9 1.0 3 0.20
Elvervollen-3 27.50 6.18 27.00 2 62.1 77.7 22.8 72 2.10
Elvervollen-4 16.95 5.10 25.20 1 56.7 68.8 25.0 61 3.60
TG90110 9.04 11.00 9.00 1 32.0
TG90111 7.32 1.00 7.00 1 22.0
TG90112 20.50 3.00 13.00 1 12.0
851 23.40 4.00 11.00 1 10.0
852 9.66 5.00 5.00 1 26.0
853 8.86 1.00 5.00 1 1.0
854 5.25 1.00 5.00 1 5.0
855 10.21 1.00 5.00 1 25.0
856 6.65 1.00 5.00 1 7.0
857 7.92 1.00 5.00 1 12.0
858 18.25 2.00 5.00 1 44.0
859 5.80 1.00 5.00 1 7.0
860 2.59 1.00 5.00 1 33.0
861 29.14 3.00 5.00 1 12.0
862 3.63 1.00 5.00 1 16.0
863 2.61 1.00 5.00 1 7.0
------------------
Sample No. Ta* Cs* La* Ce* B* Li* Be* Na* Mg*
Elvervollen-1 -0.05 0.06 1.00 1.44 1 0 100 300
Elvervollen-2 -0.05 0.15 0.80 1.23 1 0 200 300
Elvervollen-3 0.13 2.93 21.40 40.30 9 1 8600 6300
Elvervollen-4 0.24 2.63 10.00 19.95 8 1 7100 5600
TG90110 21.00 2
TG90111 2.00 3
TG90112 2.00 2
851 9.00 4
852 12.00 8
853 2.00 8
854 2.00 3
855 2.00 6
856 2.00 12
857 2.00 13
858 9.00 6
859 2.00 8
860 2.00 6
861 2.00 3
862 2.00 12
863 2.00 15
------------------
Sample No. Al* P* K * Ca* Sc* Ti* Te* Hf* Re*
Elvervollen-1 1600 220 700 500 0.40 -50 0.18 -0.10 0
Elvervollen-2 3300 140 1700 300 0.90 70 0.28 0.10 0
Elvervollen-3 41500 980 14000 3500 9.00 900 2.35 1.70 0
Elvervollen-4 37000 970 12800 3900 7.00 1340 2.05 1.50 0
TG90110
TG90111
TG90112
851
852
853
854
855
856
857
858
859
860
861
862
863
------------------
Sample No. Tl*
Elvervollen-1 0
Elvervollen-2 0
Elvervollen-3 1
Elvervollen-4 1
TG90110
TG90111
TG90112
851
852
853
854
855
856
857
858
859
860
861
862
863

The fact sheet was created on 27.04.2024
Questions or comments regarding the fact sheet can be emailed to:
ressursdatabaser@ngu.no
Copyright © 2024 Geological Survey of Norway