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THE ORE DATABASE
Deposit Area 829 - 052
(Last updated 28.mar.2020)

Name of Deposit Area : Åby
(Object Id : 0829,052,00,00)

Location
County : Telemark (08) Municipality : Kviteseid (0829)
Map 1:50000: Bandak (1513-1) Map 1:250000: Skien
Marking point: Longitude: 8.3002310 Latitude: 59.4842040
EU89-UTM Zone 32 (Coordinates IS confirmed)
X-coord: 460363 m. Y-coord: 6594178 m.

Commodity
Main Type: Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) Sub Type: Copper
Element(s): Cu Ag
Production
Activity: Pitting Reserves:
Prod. method: Production:
Prod. status: Volume of dump:

Importance
Public: Little Importance (reg. 18.02.2015)
Economical: Minor interest , (Confirmed 24.nov.2006 by Jan Sverre Sandstad)

Operations
From - To Activity Comments
1886 - 1887 Pitting
2006 - 2006 Sampling Company/Institution :NGU

Mineralization
Era: Proterozoic Period: Mesoproterozoic
Dating: Method:
Genesis: Hydrothermal vein Form: Lens
Main texture: Fracture filling Min. distribution: Irregular (scattered)
Main grain size: Fine grained (< 1 mm) Main alteration:
Strike/Dip: 210 / 50 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: Høydalsmo group Formation: Morgedal formation

Mineralogy
Relationship Mineral Amount
Gangue mineral Quartz Major mineral (>10%)
Gangue mineral Carbonate Subordinate mineral (1-10%)
Ore mineral Bornite Major mineral (>10%)
Ore mineral Chalcocite Subordinate mineral (1-10%)
Ore mineral Digenite Subordinate mineral (1-10%)
Ore mineral Idaite Accessory mineral (<1%)

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 Schistosity Strike/Dip :16 / 75 Syn-mineralisation ;...Effect :Modifies

Information(s) in free text format
Free text
Forekomsten ligger ca. 150 m sørvest for den lille gården Åby i tett granskog i en brattskråning. En dagskjæring med lengde på veggene 3x2 m med retning 278º er drevet inn mot et 8-10 m høyt stup i vest. Veggen i nord er 2 m høy. Forsøksdrift ble utført i 1887 (Dons 1963). Berggrunnen domineres av finkornet, grå amfibolitt. Den mest markerte struktur er kløv med orientering 16º/75º. Få, tynne karbonatlinser er parallelle denne kløven. Det er drevet på en noe uregelmessig, 2-5 cm bred kvarts+karbonatåre med retning omkring 210º/50º. Den fører aggregater og strenger av bornitt og mindre mengder kobberglans. Det er en ubetydelig forekomst.

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
TE0107.01 Bedrock
Sampler :J.S. Sandstad/...Stored :L¿kken/...Size(kg) :2
Comment :Bornite, fine-grained aggregates/veinlets in quartz+carbonate vein
No. of registrated element analyses = 1
NB! All analyse values are shown at the end of the printout.:


Analyse Results
from
Deposit Area 829 - 052 Åby

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#
TE0107.01 Bedrock 19670 -100 -100 10 30 14.0 30.0
------------------
Sample No. As* Cd* Mo* Sb* Bi* Cr* Mn* Fe% W*
TE0107.01 -100 -10.0 -10.00 -10 -100 10 1500 2.80 -10
------------------
Sample No. Sr* P* Ca*
TE0107.01 80.0 0 5


The fact sheet was created on 28.03.2024

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