Crookesite

Crookesite

Se, 34]

Published in Alina Kabata-Pendias, Barbara Szteke, Trace Elements in Abiotic and Biotic Environments, 2015

Approximately 50 Se minerals are known, of which the relatively common are klockmanite (CuSe), berzelianite (Cu2−xSe), clausthalite (PbSe), tiemannite (HgSe), ferroselenite (FeSe2), crookesite [(Cu,Tl,Ag)2Se], and cobaltomenite [Co(SeO3) 2H2O]. Commonly Se occurs in association with some host minerals, such as pyrite, chalcopyrite, and sphalerite.

Solstad, a Co-Se-bearing copper ore in the Västervik quartzites, Sweden

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Journal Information

Published in GFF, 2022

Kjell Billström, Johan Söderhielm, Curt Broman, Krister Sundblad

A number of significant, but much smaller, mining operations have also been undertaken in a heterogeneous metallogenetic sub-province in south-eastern Sweden, immediately to the south of Bergslagen. These ores occur in a wide range of geological settings and include in particular copper and iron ores in 1.9 Ga amphibolites in the Åmmeberg-Valdemarsvik region and copper and cobalt ores in <1.9 Ga quartzites in the Västervik region. Some of the sites in these regions are famous for very early (although not the first) discoveries of cobalt and selenium and for being type localities for a number of mineral phases, such as berzelianite (Cu2Se), crookesite (Cu7(Tl,Ag)Se4) and gladite (PbCuBi5S9).

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Se, 34]

Solstad, a Co-Se-bearing copper ore in the Västervik quartzites, Sweden