Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Phase relations in the K2CO3-FeCO3 and MgCO3-FeCO3 systems at 6 GPa and 900-1700 degrees C. / Shatskiy, Anton; Litasov, Konstantin D.; Ohtani, Eiji и др.
в: European Journal of Mineralogy, Том 27, № 4, 2015, стр. 487-499.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Phase relations in the K2CO3-FeCO3 and MgCO3-FeCO3 systems at 6 GPa and 900-1700 degrees C
AU - Shatskiy, Anton
AU - Litasov, Konstantin D.
AU - Ohtani, Eiji
AU - Borzdov, Yuri M.
AU - Khmelnikov, Aleksandr I.
AU - Palyanov, Yuri N.
PY - 2015
Y1 - 2015
N2 - The phase relations in the K2CO3 FeCO3 system were studied in multianvil experiments using graphite capsules at 6 GPa and 900-1400 degrees C. Subsolidus assemblages comprise the stability fields of K2CO3 + K2Fe(CO3)(2) and K2Fe(CO3)(2) + siderite with the transition boundary at X(K2CO3) = 50 mol%. The K2CO3-K2Fe(CO3)(2) and K2Fe(CO3)(2)-FeCO3 eutectics are established at 1100 degrees C and 65 mol% and at similar to 1150 degrees C and 46 mol% K2CO3, respectively. Siderite is a subliquidus phase at 1400 degrees C at X(K2CO3)The siderite-magnesite system was studied at 6 GPa and 900-1700 degrees C. Complete solid solution is recorded between Fe0.94Mn0.06CO3 siderite and magnesite. At X(MgCO3) = 7 mol% and 1600 degrees C, the (Fe0.90Mn0.06Mg0.04)CO3 partial melt coexists with (Fe0.86Mn0.06Mg0.08)CO3 siderite, whereas at X(MgCO3) = 26 and 35 mol%, the (Fe0.71Mn0.06Mg0.23)CO3 partial melt coexists with (Fe0.51Mn0.06Mg0.43)CO3 siderite. Based on these data, Fe0.94Mn0.06CO3 siderite should melt slightly below 1600 degrees C, i.e. 300 degrees lower than magnesite. Development of bubbles in the quenched melt at X(MgCO3) = 7 mol% and 1700 degrees C suggests incongruent melting of siderite according to the reaction: siderite = liquid + CO2 fluid.
AB - The phase relations in the K2CO3 FeCO3 system were studied in multianvil experiments using graphite capsules at 6 GPa and 900-1400 degrees C. Subsolidus assemblages comprise the stability fields of K2CO3 + K2Fe(CO3)(2) and K2Fe(CO3)(2) + siderite with the transition boundary at X(K2CO3) = 50 mol%. The K2CO3-K2Fe(CO3)(2) and K2Fe(CO3)(2)-FeCO3 eutectics are established at 1100 degrees C and 65 mol% and at similar to 1150 degrees C and 46 mol% K2CO3, respectively. Siderite is a subliquidus phase at 1400 degrees C at X(K2CO3)The siderite-magnesite system was studied at 6 GPa and 900-1700 degrees C. Complete solid solution is recorded between Fe0.94Mn0.06CO3 siderite and magnesite. At X(MgCO3) = 7 mol% and 1600 degrees C, the (Fe0.90Mn0.06Mg0.04)CO3 partial melt coexists with (Fe0.86Mn0.06Mg0.08)CO3 siderite, whereas at X(MgCO3) = 26 and 35 mol%, the (Fe0.71Mn0.06Mg0.23)CO3 partial melt coexists with (Fe0.51Mn0.06Mg0.43)CO3 siderite. Based on these data, Fe0.94Mn0.06CO3 siderite should melt slightly below 1600 degrees C, i.e. 300 degrees lower than magnesite. Development of bubbles in the quenched melt at X(MgCO3) = 7 mol% and 1700 degrees C suggests incongruent melting of siderite according to the reaction: siderite = liquid + CO2 fluid.
KW - experimental petrology
KW - phase relations
KW - carbonates
KW - high pressure
KW - high temperature
KW - carbonate melt
KW - partial melting
KW - potassium iron carbonate
KW - siderite melting
KW - HIGH-PRESSURE
KW - CARBONATED ECLOGITE
KW - K-CYMRITE
KW - THERMODYNAMIC PROPERTIES
KW - EXPERIMENTAL CONSTRAINTS
KW - MELTING EXPERIMENTS
KW - MINERAL INCLUSIONS
KW - DIAMOND FORMATION
KW - HIGH-TEMPERATURE
KW - KIMBERLITE PIPE
U2 - 10.1127/ejm/2015/0027-2452
DO - 10.1127/ejm/2015/0027-2452
M3 - Article
VL - 27
SP - 487
EP - 499
JO - European Journal of Mineralogy
JF - European Journal of Mineralogy
SN - 0935-1221
IS - 4
ER -
ID: 25728773