Copper-bearing arsenopyrite veins. Wanthwaite Vein, English Lake District, Britain

Copper-bearing quartz-chlorite veins are associated with the faulted contact between the Skiddaw Slates and Borrowdale Volcanics.

Major Minerals:

Pyrite, arsenopyrite, sphalerite, chalcopyrite

Minor Minerals:

Galena, rutile

Trace Minerals:

Include pyrrhotite, graphite


Arsenopyrite is euhedral and optically zoned. Sphalerite shows extensively developed chalcopyrite disease


Stanley and Vaughan, 1980, 1982