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Ås Brygga, Ås, Alnö, Sundsvall, Medelpad, Sweden

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Latitude & Longitude (WGS84): 62° 26' 37'' North , 17° 28' 46'' East
Latitude & Longitude (decimal): 62.44386,17.47952
Other regions containing this locality:Scandinavia
Köppen climate type:Dfc : Subarctic climate
Name(s) in local language(s):Ås Brygga, Ås, Alnö (Alnön), Sundsvall, Medelpad, Sverige

Ås Brygga at Alnön- a classic locality one would believe. That is completely wrong- Ås Brygga is manmade and thus it is an anthroposophic locality!

The pier itself (Brygga) was made with rocks mainly from the 2 iron mines some hundred meters away and consist of titaniferous magnetite, apatite, serpentine and biotite, plus of course other good construction material. It was built in order to ship ore to the local blast-furnaces (eg Galtström).

The ores were found already in 1670- but mining started not earlier than 1762 when 860 kgs of ore were mined. 1879 production was 800 tons and 1884 the last year before closure: 150 tons.
Even though the ore was mixed with ”imported” ore from the mines at Utö (http://www.mindat.org/loc-3194.html) it was not possible to get any good results due to the high titanium content (10-15 % as TiO2 ). The main shaft at Stavsätt was less than 20 meters.
But, once again the deposit became interesting during WWII when som trenching and sampling was done.(Eckermann (1948= SGU ser Ca 36, Lundqvist et al SGU ser Ba31 (1990))

Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.

Mineral List

1 valid mineral.

Regional Geology

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

Cambrian - Ediacaran
485.4 - 635 Ma

ID: 2635832

Age: Neoproterozoic to Cambrian (485.4 - 635 Ma)

Description: Platformal sedimentary cover rocks

Lithology: Nepheline syenite, pyroxenite, carbonatite, foidolite

Reference: Bergman, S., M.B. Sephens, J. Andersson, B. Kathol, T. Bergman. Sveriges berggrund, skala 1:1 miljon. Sveriges geologiska undersökning K 423. [95]

1600 - 2500 Ma

ID: 647552
Sedimentary; Slope and deep water

Age: Proterozoic (1600 - 2500 Ma)

Description: Northern Europe, Svecofennian and Lapland-Kola orogens

Comments: Orogen, fold-thrust belt, folded region; Sigmond, 2002; Solli, unpublished compilation, 2007-08

Lithology: Greywacke, phyllite, mica schist, meta-arkose, graphitic schist, paragneiss, conglomerate, amphibolite

Reference: J.C. Harrison, M.R. St-Onge, O.V. Petrov, S.I. Strelnikov, B.G. Lopatin, F.H. Wilson, S. Tella, D. Paul, T. Lynds, S.P. Shokalsky, C.K. Hults, S. Bergman, H.F. Jepsen, and A. Solli. Geological map of the Arctic. doi:10.4095/287868. Geological Survey of Canada Map 2159A. [2]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License

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