Evidence for the mechanism of the reaction producing a bournonite–galena symplectite from meneghinite

Autor:	J. R. Ashworth, Nl Wen, R. A. Ixer
Rok vydání:	1991
Předmět:	Mineral 010504 meteorology & atmospheric sciences Chemistry Mineralogy Bournonite engineering.material 010502 geochemistry & geophysics 01 natural sciences Symplectite Geochemistry and Petrology Galena engineering Vein (geology) Copper mine 0105 earth and related environmental sciences
Zdroj:	Mineralogical Magazine. 55:153-158
ISSN:	1471-8022 0026-461X
DOI:	10.1180/minmag.1991.055.379.01
Popis:	In vein material from the abandoned copper mine at Dhurode, County Cork, Republic of Ireland, the sulphosalt meneghinite is partly replaced by later minerals, notably a symplectite of galena and bournonite. Mineral analyses and proportions indicate that the bulk Pb/Sb ratio in the symplectite is almost identical to that of the meneghinite. It is inferred that Pb and Sb were the relatively immobile elements whose short-range segregation controlled the scale of symplectite intergrowth, during a diffusive replacement reaction in which Cu and S were added from the vein-forming fluid. This is the second sulphosalt-bearing symplectite for which immobile elements have been identified. In both cases, the inferred replacement reaction causes a volume increase, approximately 15% in the present example.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::76aebe39a8f19565b5c60b664900831b https://doi.org/10.1180/minmag.1991.055.379.01 Zobrazit plný text záznamu