Landsverk 1 Feldspar Quarry (Jokeli), Landsverk, Evje og Hornnes, Aust-Agder, Norway
|Latitude & Longitude (WGS84):||58° 35' 51'' North , 7° 51' 27'' East|
|Latitude & Longitude (decimal):||58.59765,7.85751|
|Other regions containing this locality:||Scandinavia|
|Köppen climate type:||Dfc : Subarctic climate|
|Name(s) in local language(s):||Landsverk 1 feltspatgrube (Jokelid; Jokeli-bruddet), Landsverk, Evje og Hornnes kommune, Aust-Agder fylke, Norge|
One of the oldest feldspar quarries in Evje.
Bjørlykke locality nr 108.
The mine and mine dumps are open to public collecting for a fee (see general information on Landsverk).
The pegmatite dyke is about 20-30 m wide and about 120 m long, strike E-W and dip nearly vertical.
Bernd Gautestad, son of Theodor Gautestad, who once exploited the Landsverk 1 quarry, is of a different opinion. Observations from the old days seem to indicate that the pegmatite is not a vertical dyke, but rather dips at a 45-degree angle into western direction. (Personal communication to Ronald Werner, August 2017)
Note to the mineralist:
Gadolinite and thortveitite specimens were traditionally labelled with only "Landsverk" as locality name. It is almost 100% certain that in all cases thortveitite originated from Landsverk 3, and gadolinite from either Landsverk 3 or one of the neighbouring quarries.
Davidite-(Ce) was also only labelled with "Landsverk", and might actually come from Landsverk 3 or any of the other quarries in the area.
Pyrrhotite has been found in other pegmatites in the Evje-Iveland pegmatite field, but it has been said that it is more likely in the case of Landsverk 1, that it was ore from the Flåt nickel mine, that fell off the cableway while being transported to the smelter in Evje.
Laumontite was reported in old literature (Schei 1905), but a modern confirmation is lacking. In the collection of the Evje og Hornnes geomuseum Fennefoss there is no laumontite. What actually has been found, also in recent times, are epimorphs/pseudomorphs of a mix of albite/microcline/chlorite after a mineral that by crystal shape actually might have been laumontite. The perimorphs/pseudomorphs form long prismatic "tubes", sometimes empty, sometimes filled with the above-mentioned mix. The end termination is a single plane at an angle that corresponds pretty well with laumontite.
Mindat ArticlesLandsverk 1, The Jokeli Quarry by Olav Revheim
Commodity ListThis is a list of exploitable or exploited mineral commodities recorded at this locality.
48 valid minerals. 2 erroneous literature entries.
Rock Types Recorded
Select Rock List TypeAlphabetical List Tree Diagram
This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.
Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org
541 - 2500 Ma
|Proterozoic crystalline metamorphic rocks|
Age: Proterozoic (541 - 2500 Ma)
Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. 
1000 - 1600 Ma
|Proterozoic II granite|