PRELIMINARY DATA ON BISMUTH TELLURIDE FROM IZERSKIE GARBY ZONE, KARKONOSZE-IZERA BLOCK, SOUTH-WESTERN POLAND

摘要

This paper describes the first occurrence of bismuth telluride in the Izerskie Garby contact zone. In nature, there are 4 known bismuth tellurides: hedleyite (Bi7Te3), pilsenite (Bi4Te3), tsumoite (BiTe) and tellurobismuthite (Bi2Te3). They are typical accessory minerals of the polymetallic skarns. The Ca-skarns of the "Stanislaw" quarry in the Izerskie Garby, bismuth telluride occurs in association with pyrrhotite, chalcopyrite, sphalerite, and wollastonite and tend to form irregular clusters up to 40 mu m long and 15 mu m width. Research methods used so far (SEM) does not allow for unequivocal identification of studied mineral. Therefore, it is necessary to conduct further tests using the electron microprobe.