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The system Na2CO3-FeCO3at 6 GPa and its relation to the system Na2CO3-FeCO3-MgCO3. / Shatskiy, Anton; Rashchenko, Sergey V.; Ohtani, Eiji и др.
в: American Mineralogist, Том 100, № 1, 01.01.2015, стр. 130-137.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - The system Na2CO3-FeCO3at 6 GPa and its relation to the system Na2CO3-FeCO3-MgCO3
AU - Shatskiy, Anton
AU - Rashchenko, Sergey V.
AU - Ohtani, Eiji
AU - Litasov, Konstantin D.
AU - Khlestov, Mikhail V.
AU - Borzdov, Yuri M.
AU - Kupriyanov, Igor N.
AU - Sharygin, Igor S.
AU - Palyanov, Yuri N.
PY - 2015/1/1
Y1 - 2015/1/1
N2 - The phase relations in the Na2CO3-(Fe0.87Mn0.06Mg0.07)CO3 system have been studied in Kawai-type multi-anvil experiments using graphite capsules at 6.0 GPa and 900-1400 °C. Subsolidus assemblages comprise the stability fields of Na2CO3 + Na2Fe(CO3)2 and Na2Fe(CO3)2 + siderite with the transition boundary at X(Na2CO3) = 50 mol%. Intermediate Na2Fe(CO3)2 compound has rhombohedral R3 eitelite structure with cell parameters a = 4.9712(16), c = 16.569(4) A˚, V = 354.61(22). The Na2CO3- Na2Fe(CO3)2 eutectic is established at 1000 °C and 66 mol% Na2CO3· Na2Fe(CO3)2 disappears between 1000 and 1100 °C via incongruent melting to siderite and a liquid containing about 55 mol% Na2CO3. Siderite remains a subliquidus phase at 1400 °C at X(Na2CO3) ≤ 30 mol%. The ternary Na2CO3-FeCO3-MgCO3 system can be built up from the corresponding binary systems: two systems with intermediate Na2(Mg, Fe)(CO3)2 phase, which melts congruently at the Mg-rich side and incongruently at the Fe-rich side, and the (Mg, Fe)CO3 system with complete solid solution. The phase relations suggest that the maximum contribution of FeCO3 component into the lowering solidus temperatures of Na-bearing carbonated mantle domains could not exceed several tens of degrees Celsius.
AB - The phase relations in the Na2CO3-(Fe0.87Mn0.06Mg0.07)CO3 system have been studied in Kawai-type multi-anvil experiments using graphite capsules at 6.0 GPa and 900-1400 °C. Subsolidus assemblages comprise the stability fields of Na2CO3 + Na2Fe(CO3)2 and Na2Fe(CO3)2 + siderite with the transition boundary at X(Na2CO3) = 50 mol%. Intermediate Na2Fe(CO3)2 compound has rhombohedral R3 eitelite structure with cell parameters a = 4.9712(16), c = 16.569(4) A˚, V = 354.61(22). The Na2CO3- Na2Fe(CO3)2 eutectic is established at 1000 °C and 66 mol% Na2CO3· Na2Fe(CO3)2 disappears between 1000 and 1100 °C via incongruent melting to siderite and a liquid containing about 55 mol% Na2CO3. Siderite remains a subliquidus phase at 1400 °C at X(Na2CO3) ≤ 30 mol%. The ternary Na2CO3-FeCO3-MgCO3 system can be built up from the corresponding binary systems: two systems with intermediate Na2(Mg, Fe)(CO3)2 phase, which melts congruently at the Mg-rich side and incongruently at the Fe-rich side, and the (Mg, Fe)CO3 system with complete solid solution. The phase relations suggest that the maximum contribution of FeCO3 component into the lowering solidus temperatures of Na-bearing carbonated mantle domains could not exceed several tens of degrees Celsius.
KW - Carbonatite
KW - Eitelite
KW - High-pressure experiment
KW - Mantle
KW - Melting
KW - Natrite
KW - Phase relations
KW - Siderite
UR - http://www.scopus.com/inward/record.url?scp=84921325854&partnerID=8YFLogxK
U2 - 10.2138/am-2015-4777
DO - 10.2138/am-2015-4777
M3 - Article
AN - SCOPUS:84921325854
VL - 100
SP - 130
EP - 137
JO - American Mineralogist
JF - American Mineralogist
SN - 0003-004X
IS - 1
ER -
ID: 25728344