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THE ORE DATABASE
Occurence 4005 - 006 Sponbekkdal
(Object Id: 5400)
(Last updated: 28.03.2020)
Location
County: Telemark Municipality: Notodden (4005)
Map 1:50000: Gransherad (1614-2) Map 1:250000: Skien
Coordinate system: EU89-UTM Zone 32
East: 500880 m. North: 6621801 m.
Longitude: 9.0156520 Latitude: 59.7341160
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Resource
Resource Type: Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) Resource Subtype: Copper
Element(s): Cu Zn Pb
Importance
Raw material meaning: Little Importance (reg. 18.02.2015)

Resources and production
Activity: Test mining Reserves:
Operating method: Open pit and underground mining Historical production:


Operations
From - To Activity Comments
1905 - 1905 Test mining
2005 - 2005 Sampling Company/Institution :NGU

Mineralization
Era: Proterozoic Period: Neoproterozoic
Genesis: Shear zone formation Form: Lens
Main texture: Fracture filling Min. distribution: Disseminated (<20 % ore minerals)
Main grain size: Fine grained (< 1 mm) Main alteration: Epidotisation
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: Heddal Group Formation:

Mineralogy
Relationship Mineral Amount
Gangue mineral Quartz Major mineral (>10%)
Gangue mineral Epidote Major mineral (>10%)
Gangue mineral Microcline Subordinate mineral (1-10%)
Gangue mineral Fluorspar Subordinate mineral (1-10%)
Gangue mineral Chlorite Subordinate mineral (1-10%)
Ore mineral Chalcocite Major mineral (>10%)
Ore mineral Sphalerite Major mineral (>10%)
Ore mineral Bornite Major mineral (>10%)
Ore mineral Hematite Subordinate mineral (1-10%)
Ore mineral Galena Subordinate mineral (1-10%)
Ore mineral Magnetite Subordinate mineral (1-10%)
Ore mineral Carrollite Accessory mineral (<1%)
Ore mineral Hessite Accessory mineral (<1%)
Ore mineral Digenite Accessory mineral (<1%)

Lithology:
Relationship Rock Origin
Host rock Amphibolite Intrusive
Original rock :Dolerite
Metamorphic facies :Amphibolite
Wall rock Quartzite Sedimentary
Original rock :Quartz sandstone
Metamorphic facies :Amphibolite

Structures
Location: Type: Orientation(360 gr.): Relation to min.:
Wall rock Foliation Strike/Dip :350 / 85 Pre-mineralisation ;...Effect :None

Information(s) in free text format
Free text
Forekomsten ligger i brattskråning vest for fylkesveien mellom Gransherad og Rjukan. Mindre forsøksdrift foregikk i 1906. En mindre dagstrosse fører inn til en liten, vannfylt skråsynk med vegger på 4x2 m, i bunnen av en brattskrent. I dagstrossa finnes kvartsittisk bergart med små kvartsganger. Omkring synken dominerer amfibolitt med feltspatårer. Malmmineraliseringene ser ut til å følge en Ø-V orientert sprekkesone med steilt fall mot nord. De består av anrikning av finkornet magnetitt i grønn epidotrik bergart. Anrikning av sinkblende, blyglans og flusspat? finnes også i denne (prøve TE0013.02). Lokalt opptrer kobberglans+bornitt i uregelmessige epidot-førende kvartslinser i tilknytning til denne knusningssona. Forekomsten har svært liten utstrekning og har ingen økonomisk interesse.

Fieldsamples
Sample No. Sample type Miscellanrous
TE0013.01 Dump
Sampler: J.S. Sandstad/...Stored: L¿kken/...Size(kg): 2
Comment: Chalcocite+bornite veinlets in quartz+epidote
No. of registrated element analyses = 1
TE0013.02 Dump
Sampler: J.S. Sandstad/...Stored: L¿kken/...Size(kg): 2
Comment: Magnetite+fluorspar? in green rock
No. of registrated element analyses = 1
NB! All analyse values are shown at the end of the printout.:

Name of Locality: Hegna
(Object Id: 17772 6,01,00)
Location
County: Telemark Municipality: Notodden (4005)
Map 1:50000: Gransherad (1614-2) Map 1:250000: Skien
Coordinate system: EU89-UTM Zone 32
East: 500879 m. North: 6621300 m.
Longitude: 9.0156490 Latitude: 59.7296260
Show on map
Resource
Resource Type: Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) Resource Subtype: Copper
Element(s): Cu Zn Pb
Resources and production
Activity: Pitting Reserves:
Operating method: Historical production:


Mineralogy
Relationship Mineral Amount
Gangue mineral Quartz Major mineral (>10%)
Gangue mineral Epidote Subordinate mineral (1-10%)
Ore mineral Chalcocite Major mineral (>10%)
Ore mineral Pyrrhotite Subordinate mineral (1-10%)

Lithology:
Relationship Rock Origin
Wall rock Quartzite Sedimentary
Original rock :Quartz sandstone
Metamorphic facies :Amphibolite
Wall rock Amphibolite Intrusive
Original rock :Dolerite
Metamorphic facies :Amphibolite

Structures
Location: Type: Orientation(360 gr.): Relation to min.:
Wall rock Foliation Strike/Dip :344 / 65 Syn-mineralisation ;...Effect :Modifies

Information(s) in free text format
Free text
Et lite skjerp med vegger på 1x1 m og 1 m høy kant i NØ. En kvartsgang/-linse finnes langs kontakten mellom kvartsitt i NØ og middelskornet amfibolitt i SV. Kun spor av kobberglans finnes i tynne, uregelmessige epidotårer i kvartsen som er melkehvit og middelskornet.

Analyse Results
from
Deposit Area 4005 - 006 Sponbekkdal

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#
TE0013.01 Dump 10000 882 324 5 12 78.4 33.0
TE0013.02 Dump 9038 10000 7633 72 50 50.2 33.0
------------------
Sample No. Pt# Pd# As* Cd* Ba* Mo* Sb* Bi* V*
TE0013.01 2.0 6.0 -2 10.7 6 1.00 -3 19 14
TE0013.02 -2.0 3.0 12 177.9 319 -1.00 8 33 169
------------------
Sample No. Cr* Mn* Fe% W* Sr* La* B* P* Ca*
TE0013.01 16 499 1.12 -2 5.0 -1.00 -3 0 0
TE0013.02 26 2177 9.64 -2 66.0 7.00 13 0 1

The fact sheet was created on 25.04.2024
Questions or comments regarding the fact sheet can be emailed to:
ressursdatabaser@ngu.no
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