The Hydrothermal Stability of Annite in the Presence of Sulfur
- 15 December 1972
- journal article
- Published by Taylor & Francis in Geologiska Föreningen i Stockholm Förhandlingar
- Vol. 94 (4) , 549-564
- https://doi.org/10.1080/11035897209453687
Abstract
The destabilization of the annite component in biotite, due to the presence of sulfur, has been studied by means of hydrothermal synthesis experiments in the temperature interval 485–575°C. Equilibrium relations between the composition of co-existing pyrrhotite and biotite in a system also containing magnetite and sanidine as solid phases are demonstrated. The composition of the vapor phase and the enthalpies of various reactions have also been calculated. Die Einwirkung von Schwefel auf den Eisengehalt von Biotit wurde experimentell mittels hydrothermaler Synthesen im Temperaturintervall von 485°–;575°C untersucht. Gleichgewichtsbeziehungen zwischen den Zusammensetzungen von koexistierendem Magnelkies und Biotit in einem System mit Magnetit und Sanidin als zusätzliche feste Phasen wurden ermittelt. Die Zusammensetzung der fluiden Phase und die Enthalpien verschiedener Reaktionen wurden berechnet.Keywords
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