Russian Mineralogical Society
2nd International Conference "Crystallogenesis and Mineralogy"
Oscillatory zoning in goldfieldite crystals

RMS-DPI code:  2007-1-143-0
Scientific session:  Session 5. Crystal chemistry and crystal morphology of minerals
Author listing:  Plotinskaya O.Yu., Rusinov V.L., Seltmann R.
Principal author:  Plotinskaya Olga Yurievna
Language:  Russian
Abstract - Summary 
(short description):
Oscillatory zoning was found in tellurian fahlores (goldfieldites) from three epithermal Au-Ag deposits: Prasolovskoe, Ozernovskoe (Kamchatka-Kuril arc, Russia), and Elshitsa (Sredna Gora zone, Bulgaria). Two types of oscillatory zoning were revealed: (1) Multiphase (or heterophase) with successive deposition of different minerals or mineral assemblages e.g. regular alternation of goldfieldite bands with bands of tennantite with inclusions of native Te. The number of such zones in grains with multiphase zoning is usually the same for all crystals in the sample which means that multiphase zoning was caused by an external factor, e.g. due to fluctuation of H2S and O2 activities in the solution. (2) Monophase oscillatory zoning reflects element fluctuations in the chemical composition of a mineral. This zoning was caused by an internal factor, e.g. by the difference between velocities of absorption of any component and its diffusion in the growing zone of the crystal.
 
RMS-DPI code:  2007-1-143-0
Proceeedings volume 
in the RMS catalogue:
 
Crystallogenesis and Mineralogy
Pages:  320-323
File of proceedings 
(PDF): 
 284 K
Status:  printed
Accepted:  03/07/2007
Published on-line:  05/01/2008
Permanent address of publication:  http://www.minsoc.ru/2007-1-143-0/
Contact author(s):  Plotinskaya, Olga Yurievna

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