caa a22 4500 465791050 CHVBK 20180323112024.0 cr unu---uuuuu 170327e19900701xx s 000 0 eng 10.1007/BF01575618 doi (NATIONALLICENCE)springer-10.1007/BF01575618 Experimental study of a biotite-bearing granitic system under water-saturated and water-undersaturated conditions [Elektronische Daten] [Jacek Puziewicz, Wilhelm Johannes] Phase relationships in haplogranitic melts containing ferromagnesian minerals were investigated in the temperature range 760-850°C, atP total=2 kbar, $$a_{H_2 O} $$ =0.25 1.00, and at NNO buffer conditions. The compositions of coexisting biotite, orthopyroxene, magnetite and granitic melt were determined by electron microprobe. Biotite was the only Fe−Mg mineral in the starting material. It disappeared in water-undersaturated melts at temperatures above 830°C and in melts saturated with water above 810°C. Magnetite was present in all runs. Orthopyroxene became stable between 780 and 800°C. The Mg/(Mg+Fe) ratios of biotite (0,63-0,72) and orthopyroxene (0,63-0,71) are similar in water-saturated and undersaturated melts at comparable temperatures and increase slightly with increasing temperature. The solubility of Mg in haplogranitic melts is very low (0,07-0,24 wt% MgO). It increases slightly with temperature and is independent of the prevailing water activity. The solubility of Fe is low (0,91-1,37 wt% FeO); it also increases with increasing temperature, and it is higher in water-saturated than in water-undersaturated melts. Springer-Verlag, 1990 Puziewicz Jacek Institut für Mineralogie, Universität Hannover, Welfengarten 1, D-3000, Hannover 1, Federal Republic of Germany aut Johannes Wilhelm Institut für Mineralogie, Universität Hannover, Welfengarten 1, D-3000, Hannover 1, Federal Republic of Germany aut Contributions to Mineralogy and Petrology Springer-Verlag 104/4(1990-07-01), 397-406 0010-7999 104:4<397 1990 104 410 https://doi.org/10.1007/BF01575618 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF01575618 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Puziewicz Jacek Institut für Mineralogie, Universität Hannover, Welfengarten 1, D-3000, Hannover 1, Federal Republic of Germany aut NATIONALLICENCE 700 1- Johannes Wilhelm Institut für Mineralogie, Universität Hannover, Welfengarten 1, D-3000, Hannover 1, Federal Republic of Germany aut NATIONALLICENCE 773 0- Contributions to Mineralogy and Petrology Springer-Verlag 104/4(1990-07-01), 397-406 0010-7999 104:4<397 1990 104 410 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer