antimony - Sciencemadness.org

48 THE METALLURGY OF ANTIMONY.
stibnite, sometimes associated with iron pyrites and brown spar, is
found in true veins, or between the planes of stratification, or in
cleavage fissures. This is a good example of the lateral immigration
of antimony ore from fissures into and along beds of shaly rocks. (C.)*
At Bohmsdorf and Wolfsgalgen, near Schleiz, stibnite is found in
quartz veins traversing palaeozoic schists. The subsidiary minerals
are zinc-blende, plumose stibnite, pyrophyllite, and iron spar. (A.)
At Mobendorf, antimony ore occurs in veins, cutting the gneiss
formation, with fillings of stibnite and some berthierite, bournonite,
striated kaolin, steinmannite, zincite, kermesite, stibiconite, pyrite,
quartz, and brown spar. At Braunsdorf, a few kilometres off, the
same ore is found intimately associated with rich silver ores. In the
vicinity of Freiberg, the quartz-stibnite vein is simply the continuation
of a true quartz formation. For this reason Freiesleben called
it the " Mobendorf Formation ;; (A).
Summary.
Mobendorf
Hayniclien (Niedersteigis)
Ennersdorf , r, . n. o , . ,
Seiferdorf f Gryrtalkne Schist
Rochlitz
Schoneck
Brandholz
"Wolfsberg Silurian.
Goesdorf Lower Devonian.
Arnsberg Culm.
HUNGARY.
At Magurka, according to von Cotta, the granite is traversed by
many quartz veins, varying from a few centimetres to 4 m. in thickness.
They carry stibnite and free gold, enclosing sometimes some of the
country. The accessory minerals found in these veins are galena,
zinc-blende, pyrite, copper pyrite, brown spar, and calc-spar.
Ordinarily the quartz occurs along the walls of the veins, while
the stibnite occupies the central part. (B.)
At Pricov, near Selcan, stibnite is found, according to A. Hoffmann,
in veins of hornstone, generally accompanied by kersantite dykes,
cutting through the granite. At a depth of 18 m. (59 ft.) the
stibnifce is decomposed to stibiconite. (A.)
Some of the veins carrying antimony ores in the Rechnitz
* By some authors this is classified under E.