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THE ORE DATABASE
Occurence 4613 - 039 Ersland
(Object Id: 4849)
(Last updated: 03.04.1997)
Location
County: Vestland Municipality: Bømlo (4613)
Map 1:50000: Bømlo (1114-2) Map 1:250000: Haugesund
Coordinate system: EU89-UTM Zone 32
East: 289817 m. North: 6631641 m.
Longitude: 5.2565060 Latitude: 59.7691810
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Resource
Resource Type: Base metals (Cu,Zn,Pb,Fe sulphides, As,Sb,Bi,Sn) Resource Subtype: Sulphides
Element(s): Kis
Importance
Raw material meaning: Not Assessed (reg. 18.02.2015)

Resources and production
Activity: Test mining Reserves:
Operating method: Open pit and underground mining Historical production: 50 thousand tons


Operations
From - To Activity Comments
1880 - 1884 Test mining

Mineralization
Era: Paleozoic Period:
Genesis: Hydrothermal vein Form: Lens
Main texture: Fracture filling Min. distribution: Irregular (scattered)
Main grain size: Fine grained (< 1 mm) Main alteration:
Strike/Dip: 15 / 58 Direction:
Plunge:
Stratigraphic classification of host rock
Era: Paleozoic Period: Cambrian
Province:
Geotec.unit:
Tectonic complex:
Igneous complex:
Group: Formation: Geitungenheten

Mineralogy
Relationship Mineral Amount
Gangue mineral Quartz Major mineral (>10%)
Ore mineral Galena
Ore mineral Pyrite

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

Structures
Location: Type: Orientation(360 gr.): Relation to min.:
Host rock Fault plane Strike :15 Syn-mineralisation ;...Effect :Controls

Information(s) in free text format
Free text
Mineraliseringen ligger ved Erslandsvatnets nordøstlige bredd, like øst for den lille halvøya Litlaneset og rett under den østligste af to kraftlinjer som krysser sjøen. Det må være dette stedet Olsen (1885) omtaler som "Ertsland". Åras orientering er 15/58°Ø, tykkelsen ved stollens inngang er 40-45 cm, men øker til ca. 70 cm et par m inne i stollen. I stollens endevegg ses ingen kvarts, og det antas derfor at åra er linseformet. Vertsbergarten er basalt, orientering på lagningen er 102/72°S. Kvartsen er grå til hvit og inneholder litt svovelkis samt et finkornet, sølvgrått mineral som forekommer i en 5 mm tykk åre og sannsynligvis er blyglans. Innholdet av malmmineraler er lavt, mindre end 1%.

Fieldsamples
Sample No. Sample type Miscellanrous
HO0160.01 Bedrock
Sampler: Wulff, P./...Stored: Løkken
Comment: Kvarts med 1% py.
No. of registrated element analyses = 1
HO0160.02 Bedrock
Sampler: Wulff, P./...Stored: Løkken
Comment: Kvarts med 10 % py.
No. of registrated element analyses = 1
HO0160.03 Bedrock
Sampler: Wulff, P./...Stored: Løkken
Comment: Kvarts med 5 % spekularitt (ga?) i åre.
No. of registrated element analyses = 1
NB! All analyse values are shown at the end of the printout.:

Analyse Results
from
Deposit Area 4613 - 039 Ersland

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#
HO0160.01 Bedrock 28 20 411 1 3 6.8 5.0
HO0160.02 Bedrock 13 6 50 9 6 1.4 4.0
HO0160.03 Bedrock 27 15 7427 1 3 129.9 133.0
------------------
Sample No. Pt# Pd# Rh# As* Cd* Ba* Mo* Sb* Bi*
HO0160.01 -3.0 -3.0 -5.0 2 .3 1 17.00 -2 42
HO0160.02 -3.0 -3.0 -5.0 9 -.2 3 1.00 -2 5
HO0160.03 -3.0 -3.0 -5.0 2 5.3 2 18.00 -2 675
------------------
Sample No. S% V* Cr* Mn* Fe% Th* U* W* Sr*
HO0160.01 .12 5 7 44 .55 -2.00 -5.00 -2 1.0
HO0160.02 1.15 10 6 97 2.73 -2.00 -5.00 -2 1.0
HO0160.03 .32 13 11 76 .93 -2.00 -5.00 -2 2.0
------------------
Sample No. La* B*
HO0160.01 1.00 -3
HO0160.02 -1.00 3
HO0160.03 3.00 -3

The fact sheet was created on 26.04.2024
Questions or comments regarding the fact sheet can be emailed to:
ressursdatabaser@ngu.no
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