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THE ORE DATABASE
Occurence 4024 - 009 Ålmannsroe
(Object Id: 5765)
(Last updated: 28.03.2020)

Location
County: Telemark Municipality: Hjartdal (4024)
Map 1:50000: Hjartdal (1614-3) Map 1:250000: Skien
Coordinate system: EU89-UTM Zone 32
East: 480267 m. North: 6614184 m.
Longitude: 8.6497690 Latitude: 59.6652600
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Resource
Resource Type: Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) Resource Subtype: Copper
Element(s): Cu
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
2006 - 2006 Sampling Company/Institution :NGU

Mineralization
Era: Proterozoic Period: Mesoproterozoic
Genesis: Metamorphic formation Form: Lens
Main texture: Fracture filling Min. distribution: Disseminated (<20 % ore minerals)
Main grain size: Fine grained (< 1 mm) Main alteration: Chloritisation
Strike/Dip: 15 Direction:
Plunge:
Stratigraphic classification of host rock
Era: Proterozoic Period: Mesoproterozoic
Province: South Norwegian Basement Province
Geotec.unit: Telemark Supergroup
Tectonic complex:
Igneous complex:
Group: Vindeggen Group Formation:

Mineralogy
Relationship Mineral Amount
Gangue mineral Quartz Major mineral (>10%)
Gangue mineral Chlorite Subordinate mineral (1-10%)
Gangue mineral Carbonate Subordinate mineral (1-10%)
Ore mineral Bornite Major mineral (>10%)

Lithology:
Relationship Rock Origin
Host rock Calcareous schist Sedimentary
Original rock :Tuffite
Metamorphic facies :Greenschist

Structures
Location: Type: Orientation(360 gr.): Relation to min.:
Host rock Axial plane cleavage Strike/Dip :22 / 55 Syn-mineralisation ;...Effect :Modifies

Information(s) in free text format
Free text
Et mindre skjerp ligger på en odde på nordøstsida av Breidvatnet. Det består av en grunn grøft på 1x4 m langs en liten knaus. Skjerpet ligger i finkornet, karbonat-rik amfibolitt som er isoklinalt foldet. Kløv er den mest markert struktur i bergarten, 22º/55º. Få, uregelmessige kvarts-karbonat linser er vanlig. Disse fører svak disseminasjon av bornitt. Forekomsten er ubetydelig.

Bibliography:
From NGU's Reference Archive:
Dons, Johannes A. , 1963
De prekambriske bergarter i Telemark, I. Gruber og skjerp innen gradeteigkart E36V Kviteseid.
;Norges geologiske undersøkelse;TIDSSKRIFTARTIKKEL;NGU; No.216;1-80 pages
Abstract:
Approximately 115 mines and claims have been examined in the years 1941-1961 during regional geological mapping of the Kviteseid quadrangle. The map area covers a part of the "Thelemark-Sætersdal ore province" established by prof. J.H.L. Vogt in 1886. The oldest mine in the area, opened in the year 1524, was worked for silver bearing chalcopyrite and bornite. Other mines have been worked for gold, native copper and silver, molybdenite, galena, arsenopyrite, bismuthinite. All the mines have long since been abandoned and most of the surface workings are overgrown and difficult to find. The 15 native copper and silver deposits (which also contain vanadium minerals) form a separate group. They are all situated along the contact between a sandstone and an overlying basalt, the ore being confined to the sandstone. Most of the other deposits are of Quartz vein type. In quartzites which cover the greatest part of the map area, most of the quartz veins are barren. The great abundance of ore minerals in quartz veins in basic lavas and basic sills may be due to favourable pH conditions in these rocks. The galena deposits are found within a limited area close to a penetrating granite. The ore mineral paragenese in some of the deposits may have been formed under hypothermal to mesothermal conditions whereas other possibly originated at lower temperatures.

Fieldsamples
Sample No. Sample type Miscellanrous
TE0379.01 Bedrock
Sampler: J.S. Sandstad/...Stored: L¿kken/...Size(kg): 1
Comment: Weak bornite dissemination within and along quartz-carbonate vein in greenstone
No. of registrated element analyses = 1
NB! All analyse values are shown at the end of the printout.:


Analyse Results
from
Deposit Area 4024 - 009 Ålmannsroe

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#
TE0379.01 Bedrock 13130 600 100 -10 10 13.0 40.0
------------------
Sample No. As* Cd* Mo* Sb* Bi* Cr* Mn* Fe% W*
TE0379.01 -100 -10.0 -10.00 -10 -100 10 1100 1.38 -10
------------------
Sample No. Sr* P* Ca*
TE0379.01 210.0 0 8


The fact sheet was created on 29.03.2024

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