Laisvall Mine, Arjeplog, Norrbotten County, Sweden (original) (raw)
Laisvall Mine, Arjeplog, Norrbotten County, Swedeni
| Regional Level Types | |
|---|---|
| Laisvall Mine | Mine |
| Arjeplog | Municipality |
| Norrbotten County | County |
| Sweden | Country |
Latitude & Longitude (WGS84):
66° 4' 55'' North , 17° 6' 12'' East
Latitude & Longitude (decimal):
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Östansjö | 862 (2017) | 18.9km |
Long-form identifier:
mindat:1:2:73029:2
e6be4ef8-18e8-4da1-9c41-3c49f6664444
Swedish:
Laisvallgruvan, Arjeplogs kommun, Norrbottens län, Sverige
Sandstone lead-zinc deposit located at the Caledonian border of Sweden.
80 million tons of ore in two Eocambrian sandstone thin horizons.
Host rocks :
- Upper sandstone (ore-bearing/zinc-dominant): alternating layers of coarse and fine-grained wellsorted quartzite
- Middle sandstone (barren): with clayey matrix
- Lower sandstone (ore-bearing/lead-dominant): fine-grained, well-sorted quartzite with thin shale bands
Calcite is enriched with F and Ba, and has alternatively precipitated on warming and dissolved on cooling. Sulfides precipitated during cooling.
Quartz deposition precedes and postdates ore deposition.
Conditions of formation : 170-130°C / 24 wt% eq NaCl. Hot metal-rich brine moving from the west mixed with a cool local S-rich groundwater of lower salinity, replenished by seasonal rainfall.
Facts& Fig; First ore boulders found in 1938, followed by extensive exploration until -42. Agreement between the Boliden Company and the Swedish government to mine and produce Pb in order to secure metal for the domestic demand during WWII. 1943 first ore shipment to the melter in Rönnskär. 1950 ore production rises from 50kton/a to 500 kton, further increased in 1975 to 1400 kton/a, and finally close to 2000 kton. The mine closed in december 2001. (www.boliden.com)
Three separate ore-bodies but 5 different names attributed to them, from West; North and South Nadok-, Kautsky-, Södra Strand- (South Shore)and Central-ore. The latter 3 are connected.
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Standard Detailed Gallery Strunz Chemical Elements
Commodity List
This is a list of exploitable or exploited mineral commodities recorded at this locality.
Mineral List
9 valid minerals.
Detailed Mineral List:
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Silver | 1.AA.05 | Ag |
| Group 2 - Sulphides and Sulfosalts | |||
| ⓘ | Sphalerite | 2.CB.05a | ZnS |
| ⓘ | Galena | 2.CD.10 | PbS |
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
| Group 3 - Halides | |||
| ⓘ | Fluorite | 3.AB.25 | CaF2 |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| Group 5 - Nitrates and Carbonates | |||
| ⓘ | Calcite | 5.AB.05 | CaCO3 |
| Group 7 - Sulphates, Chromates, Molybdates and Tungstates | |||
| ⓘ | Baryte | 7.AD.35 | BaSO4 |
| Group 9 - Silicates | |||
| ⓘ | Muscovite | 9.EC.15 | KAl2(AlSi3O10)(OH)2 |
| ⓘ | var. Sericite | 9.EC.15 | KAl2(AlSi3O10)(OH)2 |
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