Fahlores from porphyry Cu-Mo deposits of the Urals

database, nuove specie, discrediti,
ridefinizioni, classificazioni, ecc.
Rispondi
Avatar utente
Marco E. Ciriotti
Messaggi: 31675
Iscritto il: ven 25 giu, 2004 11:31
Località: via San Pietro, 55 I-10073 Devesi/Cirié TO - Italy
Contatta:

Fahlores from porphyry Cu-Mo deposits of the Urals

Messaggio da Marco E. Ciriotti » mer 31 ago, 2022 11:20

Referenza:
▪ Plotinskaya, O.Yu. & Kovalchuk, E.V. (2022): Fahlores from porphyry Cu-Mo deposits of the Urals. Mineralogy, 8, 5-22.

Abstract:
The paper describes chemistry of tetrahedrite group minerals from three porphyry deposits of the Urals: Mikheevskoe and Tomino porphyry copper deposits on the South Urals and Talitsa Mo porphyry deposit on the Middle Urals. In the deposits studied tetrahedrite group minerals deposited either with late mineral assemblages of the porphyry stage or within late subepithermal veins. They vary in composition from tennantite to tetrahedrite with variable Fe and Zn contents. Contents of Cd, Co, Te, Bi, Ag, Se Te, Bi, Ag, S are usually insignificant. However argentotetrahedrite-(Fe) was described within the latest assemblage at the Mikheevskoe deposit, while tennantite-tetrahedrite-(Cd) was noted overgrowing bornite at the Tomino deposit. Most tetrahedrite group minerals do not establish complicated chemical zoning: they are either homogeneous or comprise a core of intermediate tennantite-tetrahedrite composition and a rim with dominating tetrahedrite endmember. This evidences relatively quiet deposition environment with no dramatic variations of PTx parameters which is rather typical for porphyry systems. Comparison with published data shows the tetrahedrite group minerals studied are similar to those from “transitional” subepithermal mineralization.
Marco E. Ciriotti

«Things are interesting only in so far as they relate themselves to other things»

Rispondi

Chi c’è in linea

Visitano il forum: Nessuno e 50 ospiti