Abstract

Abstract. Skeletal sphalerite with stellar, cruciform and snowflake‐like (or cauliflower‐like) shapes included in pyrite is widely found in the Dajing tin‐polymetallic deposit. It occurs only in chalcopyrite‐pyrite mineralization stage. The compositions of all sphalerites in the chalcopyrite‐pyrite stage are characterized by high Cu content (3.9 ‐ 7.0 wt% with a mean of 5.4 wt%), while the skeletal crystal sphalerite has higher zinc and cadmium contents, and lower copper and iron contents, compared with other sphalerites of the same stage. The skeletal crystal sphalerite in pyrite is possibly generated by exsolution.

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