Original paper
The effect of aluminous titanite on the biotite-chlorite and amphibole-chlorite reactions
Janeczek, Janusz
European Journal of Mineralogy Volume 6 Number 5 (1994), p. 623 - 626
11 references
published: Sep 23, 1994
manuscript accepted: Jun 7, 1994
manuscript received: Jan 12, 1994
DOI: 10.1127/ejm/6/5/0623
Abstract
Abstract The effect of Al-rich titanite (XAI = 0.27 - 0.31) on formulation of mass transfer during biotite-chlorite and amphibole (pargasite)-chlorite reactions has been evaluated. The amount of Al-titanite in the chloritization reaction cannot be derived from the number of Ti atoms in 1 mole of biotite (TiBi) or amphibole (TiAmph) but is equal TiBi(Amph)/Titit, where Titit = 1 - Altit and TiBi and TiAmph are atoms of Ti and Al per formula unit of titanite. The assumption of ideal titanite stoichiometry can lead to incorrect estimates of the amount of both titanite and chlorite produced
Keywords
aluminous titanite • biotite • amphibole • chloritization