Some arsenopyrite and pyrite were also mined for their cobalt content Other sulfide minerals found in the mine included pyrrhotite, safflorite and linnaeite.
Crystals were found in vugs and in veinlets in sulfide ore consisting of pyrrhotite, chalcopyrite, pyrite and cobaltite, along with minor minerals such as safflorite, tourmaline, apatite, micas and carbonates (Glass and Vhay, 1949).
The cobalt is present mainly as safflorite
(Co[As.sub.2]) and in minor quantities as skutterudite (Co, Ni)[As.sub.3].
Let one example stand for the rest: Steffen had some excellent specimens of safflorite
pseudomorphs after silver dug from the huge dumps surrounding Shaft 186, near the village of Alberoda.
The Tynebottom mine has produced an interesting suite of nickel and cobalt-containing minerals including erythrite, safflorite
, nickel-skullerudite, violarite, rammelsbergite, annabergite, and some very attractive specimens of drusy calcite and "flowstone" colored pink to deep magenta by micro-inclusions of erythrite, or blue by copper salts.
In the district, secondary iron arsenates generally form at the expense of lollingite, arsenopyrite, safflorite and skutterudite.
The best and richest specimens of this species--from Mechoui--show red-brown rosettes and spherules resting directly on crystals of safflorite. In weathered ores at Tamdrost, arseniosiderite forms thin, cream-colored lamellae, and at Aghbar the species is associated with cabalzarite.
has been identified as microscopic inclusions in native arsenic from the Bor pit.
This rare, monoclinic polymorph of safflorite (Co[As.sub.2]) is known from only a few other locations worldwide: the Nord mine, Sweden (Burke and Zakrzewski, 1983), several deposits in the Bou Azzer region, Morocco (Vinogradova et al., 1980) and the type locality, Cobalt, Ontario (Radcliffe and Berry, 1971).
(1971) Clinosafflorite: a monoclinic polymorph of safflorite. Canadian Mineralogist, 10, 877-881.
The inclined shaft follows the vein and two small stopes, where good samples of massive safflorite can be obtained.
Cobaltite has been identified in close association with safflorite. Generally it is found as small grains or euhedral crystals at or very near the safflorite/norite interface.