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THE ORE DATABASE
Occurence 4028 - 063 Johnsli
(Object Id: 5699)
(Last updated: 28.03.2020)
Location
County: Telemark Municipality: Kviteseid (4028)
Map 1:50000: Bandak (1513-1) Map 1:250000: Skien
Coordinate system: EU89-UTM Zone 32
East: 465279 m. North: 6586088 m.
Longitude: 8.3883440 Latitude: 59.4119870
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Resource
Resource Type: Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) Resource Subtype: Copper
Element(s): Kis Cu Pb
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
1870 - 1880 Pitting
2006 - 2006 Sampling Company/Institution :NGU

Mineralization
Era: Proterozoic Period: Mesoproterozoic
Genesis: Metamorphic formation Form: Irregular
Main texture: Fracture filling Min. distribution: Irregular (scattered)
Main grain size: Fine grained (< 1 mm) Main alteration: Albitisation
Strike/Dip: 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: Formation: Transtaulhøgdi supracrustals

Mineralogy
Relationship Mineral Amount
Gangue mineral Feldspar Major mineral (>10%)
Gangue mineral Quartz Major mineral (>10%)
Gangue mineral Amphibole Major mineral (>10%)
Ore mineral Chalcopyrite Major mineral (>10%)
Ore mineral Sphalerite Accessory mineral (<1%)
Ore mineral Molybdenite Accessory mineral (<1%)
Ore mineral Galena Accessory mineral (<1%)

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

Structures
Location: Type: Orientation(360 gr.): Relation to min.:
Host rock Foliation Strike/Dip :297 / 62 Syn-mineralisation ;...Effect :Modifies

Information(s) in free text format
Free text
En uregelmessig utformet dagskjæring ligger ca. 100 m sørvest for Johnsli seter. Enkleste adkomst er fra en sti som går nordover fra bomveien vestover fra Tveitgrendi, nordvest for Kviteseid. Skjæringa er gjengrodd, 1-2 m dyp med utstrekning 10x8 m. Ca. 5 m lengre sør og 4 m lavere i terrenget er det et mindre påhugg. Mindre arbeider ble utført i 1870-årene (Dons 1963). Berggrunnen domineres av finkornet amfibolittisk bergart med foliasjon 292º/62º. Moderat disseminasjon av kobberkis finnes i noe omvandlet, feltspatrik amfibolitt som dels fører umineraliserte, mindre kvartsslirer/-linser. Lokalt finnes hyppig kobberkisstrenger i den lille skjæringa i sør. Mindre mengder molybdenglans, blyglans og sinkblende skal også være påvist. Forekomsten har ingen økonomisk interesse, men er med på å indikere at i området omkring Transtølhøgdi finnes det flere mineraliseringer som ikke er sene gangforekomster, men kan være syngenetiske.

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
TE0313.01 Dump
Sampler: J.S. Sandstad/...Stored: L¿kken/...Size(kg): 2
Comment: Chalcopyrite dissemination/veinlets in amphibolite and feldspar rock
No. of registrated element analyses = 1
NB! All analyse values are shown at the end of the printout.:

Name of Locality: Johnsli S
(Object Id: 17804 63,01,00)
Location
County: Telemark Municipality: Kviteseid (4028)
Map 1:50000: Bandak (1513-1) Map 1:250000: Skien
Coordinate system: EU89-UTM Zone 32
East: 465227 m. North: 6585854 m.
Longitude: 8.3874490 Latitude: 59.4098820
Show on map
Resource
Resource Type: Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) Resource Subtype: Copper
Element(s): Kis Cu Pb
Resources and production
Activity: Pitting Reserves:
Operating method: Historical production:


Mineralogy
Relationship Mineral Amount
Gangue mineral Quartz Major mineral (>10%)
Gangue mineral Feldspar Major mineral (>10%)
Gangue mineral Amphibole Subordinate mineral (1-10%)
Ore mineral Pyrite Major mineral (>10%)
Ore mineral Galena Subordinate mineral (1-10%)
Ore mineral Chalcopyrite Accessory mineral (<1%)
Ore mineral Arsenopyrite Accessory mineral (<1%)

Lithology:
Relationship Rock Origin
Host rock Quartz-feldspar rock Extrusive
Original rock :Rhyodacite
Metamorphic facies :Amphibolite

Information(s) in free text format
Free text
Et svært lite skjerp, trolig bare noen få skudd, finnes i sørskråningen av en markert rygg, ca. 250 m sør for hovedskjerpet. Vertsbergarten er her trolig felsisk metavulkanitt. Blokker med rik disseminasjon av pyritt og mindre mengder blyglans, kobberkis og arsenkis i amfibolrik bergart er prøvetatt.

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
TE0313.02 Dump
Sampler: J.S. Sandstad/...Stored: L¿kken/...Size(kg): 2
Comment: Pyrite+chalcopyrite+galena+arsenopyrite dissemination in amphibole-rich rock
No. of registrated element analyses = 1
NB! All analyse values are shown at the end of the printout.:

Analyse Results
from
Deposit Area 4028 - 063 Johnsli

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#
TE0313.01 Dump 32050 1400 200 30 140 68.0 180.0
TE0313.02 Dump 5370 73400 2800 50 80 33.0 100.0
------------------
Sample No. As* Cd* Mo* Sb* Bi* Cr* Mn* Fe% W*
TE0313.01 -100 70.0 10.00 -10 -100 500 200 5.50 -10
TE0313.02 100 590.0 20.00 10 100 40 700 20.80 110
------------------
Sample No. Sr* P* Ca*
TE0313.01 -10.0 0 0
TE0313.02 -10.0 0 0

The fact sheet was created on 18.04.2024
Questions or comments regarding the fact sheet can be emailed to:
ressursdatabaser@ngu.no
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