Extension and closure of the compositional gap between Mn- and Mg-rich chlorites toward Fe-rich compositions
Del Mar Abad-Ortega, Maria; Nieto, Fernando
European Journal of Mineralogy Volume 7 Number 2 (1995), p. 363 - 368
published: Mar 29, 1995
manuscript accepted: Oct 24, 1994
manuscript received: Jan 24, 1994
ArtNo. ESP147050702011, Price: 29.00 €
Abstract New data on the evolution of the Mn-Mg chlorite compositional gap toward Fe-rich compositions have been obtained from a nodule of metamorphic rock included in the Sierra Albarrana pegmatite body. Mn-rich chamosites were formed as a result of the decomposition of spessartine-rich almandine. The gap defined by Schreyer et al. (1986) for Mg-rich compositions persists in the Fe-rich region of the Mn-Mg-Fe compositional triangle and closes near the Fe-Mn side.