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Phase relationships in the system K2CO3-CaCO3 at 6 GPa and 900-1450°C. / Shatskiy, Anton; Borzdov, Yuri M.; Litasov, Konstantin D. et al.

In: American Mineralogist, Vol. 100, No. 1, 01.01.2015, p. 223-232.

Research output: Contribution to journal › Article › peer-review

Harvard

Shatskiy, A, Borzdov, YM, Litasov, KD, Sharygin, IS, Palyanov, YN & Ohtani, E 2015, 'Phase relationships in the system K2CO3-CaCO3 at 6 GPa and 900-1450°C', American Mineralogist, vol. 100, no. 1, pp. 223-232. https://doi.org/10.2138/am-2015-5001

APA

Shatskiy, A., Borzdov, Y. M., Litasov, K. D., Sharygin, I. S., Palyanov, Y. N., & Ohtani, E. (2015). Phase relationships in the system K2CO3-CaCO3 at 6 GPa and 900-1450°C. American Mineralogist, 100(1), 223-232. https://doi.org/10.2138/am-2015-5001

Vancouver

Shatskiy A, Borzdov YM, Litasov KD, Sharygin IS, Palyanov YN, Ohtani E. Phase relationships in the system K2CO3-CaCO3 at 6 GPa and 900-1450°C. American Mineralogist. 2015 Jan 1;100(1):223-232. doi: 10.2138/am-2015-5001

Author

Shatskiy, Anton ; Borzdov, Yuri M. ; Litasov, Konstantin D. et al. / Phase relationships in the system K2CO3-CaCO3 at 6 GPa and 900-1450°C. In: American Mineralogist. 2015 ; Vol. 100, No. 1. pp. 223-232.

BibTeX

@article{1bddcd8c2d0a426c9801357c8eddcb3d,
title = "Phase relationships in the system K2CO3-CaCO3 at 6 GPa and 900-1450°C",
abstract = "Phase relations in the system K2CO3-CaCO3 have been studied in the compositional range, X(K2CO3), from 100 to 10 mol%, at 6.0 GPa and 900-1450°C. At 900-950°C, the system has three intermediate compounds: K6Ca2(CO3)5, K2Ca(CO3)2, and K2Ca3(CO3)4. The K2Ca(CO3)2 compound decomposes to the K6Ca2(CO3)5 + K2Ca3(CO3)4 assembly above 950°C. The K6Ca2(CO3)5 and K2Ca3(CO3)4 compounds melt congruently slightly above 1200 and 1300°C, respectively. The eutectics were established at 64 and 44 mol% near 1200°C and at 23 mol% near 1300°C. K2CO3 remains as a liquidus phase at 1300°C and 75 mol% and melts at 1425 ± 20°C. Aragonite remains as a liquidus phase at 1300°C and 20 mol% and at 1400°C and 10 mol%. CaCO3 solubility in K2CO3 and K2CO3 solubility in aragonite are below the detection limit (<0.5 mol%). Infiltration of subduction-derived K-rich Ca-Mg-Fe-carbonatite into the Fe0-saturated mantle causes the extraction of (Mg,Fe)CO3 components from the melt, which shifts its composition toward K-Ca-carbonatite. According to our data this melt can be stable at the P-T conditions of subcratonic lithosphere with geothermal gradient of 40 mW/m2 corresponding to temperature of 1200°C at 6 GPa.",
keywords = "Alkaline carbonates, Buetschliite, Carbonatite, Earth's mantle, Fairchildite, High-pressure experiment",
author = "Anton Shatskiy and Borzdov, {Yuri M.} and Litasov, {Konstantin D.} and Sharygin, {Igor S.} and Palyanov, {Yuri N.} and Eiji Ohtani",
year = "2015",
month = jan,
day = "1",
doi = "10.2138/am-2015-5001",
language = "English",
volume = "100",
pages = "223--232",
journal = "American Mineralogist",
issn = "0003-004X",
publisher = "Walter de Gruyter GmbH",
number = "1",

}

RIS

TY - JOUR

T1 - Phase relationships in the system K2CO3-CaCO3 at 6 GPa and 900-1450°C

AU - Shatskiy, Anton

AU - Borzdov, Yuri M.

AU - Litasov, Konstantin D.

AU - Sharygin, Igor S.

AU - Palyanov, Yuri N.

AU - Ohtani, Eiji

PY - 2015/1/1

Y1 - 2015/1/1

N2 - Phase relations in the system K2CO3-CaCO3 have been studied in the compositional range, X(K2CO3), from 100 to 10 mol%, at 6.0 GPa and 900-1450°C. At 900-950°C, the system has three intermediate compounds: K6Ca2(CO3)5, K2Ca(CO3)2, and K2Ca3(CO3)4. The K2Ca(CO3)2 compound decomposes to the K6Ca2(CO3)5 + K2Ca3(CO3)4 assembly above 950°C. The K6Ca2(CO3)5 and K2Ca3(CO3)4 compounds melt congruently slightly above 1200 and 1300°C, respectively. The eutectics were established at 64 and 44 mol% near 1200°C and at 23 mol% near 1300°C. K2CO3 remains as a liquidus phase at 1300°C and 75 mol% and melts at 1425 ± 20°C. Aragonite remains as a liquidus phase at 1300°C and 20 mol% and at 1400°C and 10 mol%. CaCO3 solubility in K2CO3 and K2CO3 solubility in aragonite are below the detection limit (<0.5 mol%). Infiltration of subduction-derived K-rich Ca-Mg-Fe-carbonatite into the Fe0-saturated mantle causes the extraction of (Mg,Fe)CO3 components from the melt, which shifts its composition toward K-Ca-carbonatite. According to our data this melt can be stable at the P-T conditions of subcratonic lithosphere with geothermal gradient of 40 mW/m2 corresponding to temperature of 1200°C at 6 GPa.

AB - Phase relations in the system K2CO3-CaCO3 have been studied in the compositional range, X(K2CO3), from 100 to 10 mol%, at 6.0 GPa and 900-1450°C. At 900-950°C, the system has three intermediate compounds: K6Ca2(CO3)5, K2Ca(CO3)2, and K2Ca3(CO3)4. The K2Ca(CO3)2 compound decomposes to the K6Ca2(CO3)5 + K2Ca3(CO3)4 assembly above 950°C. The K6Ca2(CO3)5 and K2Ca3(CO3)4 compounds melt congruently slightly above 1200 and 1300°C, respectively. The eutectics were established at 64 and 44 mol% near 1200°C and at 23 mol% near 1300°C. K2CO3 remains as a liquidus phase at 1300°C and 75 mol% and melts at 1425 ± 20°C. Aragonite remains as a liquidus phase at 1300°C and 20 mol% and at 1400°C and 10 mol%. CaCO3 solubility in K2CO3 and K2CO3 solubility in aragonite are below the detection limit (<0.5 mol%). Infiltration of subduction-derived K-rich Ca-Mg-Fe-carbonatite into the Fe0-saturated mantle causes the extraction of (Mg,Fe)CO3 components from the melt, which shifts its composition toward K-Ca-carbonatite. According to our data this melt can be stable at the P-T conditions of subcratonic lithosphere with geothermal gradient of 40 mW/m2 corresponding to temperature of 1200°C at 6 GPa.

KW - Alkaline carbonates

KW - Buetschliite

KW - Carbonatite

KW - Earth's mantle

KW - Fairchildite

KW - High-pressure experiment

UR - http://www.scopus.com/inward/record.url?scp=84921346700&partnerID=8YFLogxK

U2 - 10.2138/am-2015-5001

DO - 10.2138/am-2015-5001

M3 - Article

AN - SCOPUS:84921346700

VL - 100

SP - 223

EP - 232

JO - American Mineralogist

JF - American Mineralogist

SN - 0003-004X

IS - 1

ER -

ID: 25728238