Research output: Contribution to journal › Article › peer-review
Composition of a carbonatitic melt in equilibrium with lherzolite at 5.5–6.3 GPa and 1350°C. / Kruk, A. N.; Sokol, A. G.; Chebotarev, D. A. et al.
In: Doklady Earth Sciences, Vol. 467, No. 1, 01.03.2016, p. 303-307.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Composition of a carbonatitic melt in equilibrium with lherzolite at 5.5–6.3 GPa and 1350°C
AU - Kruk, A. N.
AU - Sokol, A. G.
AU - Chebotarev, D. A.
AU - Palyanov, Yu A.
AU - Sobolev, N. V.
PY - 2016/3/1
Y1 - 2016/3/1
N2 - Generation of ultra-alkaline melts by the interaction of lherzolite with cardonatites of various genesis was simulated at the P–T parameters typical of the base of the subcratonic lithosphere. Experiments with a duration of 150 h were performed at 5.5 and 6.3 GPa and 1350°C. The concentrations of CaO and MgO in melts are buffered by the phases of peridotite, and the concentrations of alkalis and FeO depend on the composition of the starting carbonatite. Melts are characterized by a low (<7 wt %) concentration of SiO2 and Ca# from 0.40 to 0.47. It is demonstrated that only high-Mg groups of carbonatitic inclusions in fibrous diamonds have a composition close to that of carbonatitic melts in equilibrium with lherzolite. Most likely, the formation of kimberlite-like melts relatively enriched in SiO2 requires an additional source of heat from mantle plumes and probably H2O fluid.
AB - Generation of ultra-alkaline melts by the interaction of lherzolite with cardonatites of various genesis was simulated at the P–T parameters typical of the base of the subcratonic lithosphere. Experiments with a duration of 150 h were performed at 5.5 and 6.3 GPa and 1350°C. The concentrations of CaO and MgO in melts are buffered by the phases of peridotite, and the concentrations of alkalis and FeO depend on the composition of the starting carbonatite. Melts are characterized by a low (<7 wt %) concentration of SiO2 and Ca# from 0.40 to 0.47. It is demonstrated that only high-Mg groups of carbonatitic inclusions in fibrous diamonds have a composition close to that of carbonatitic melts in equilibrium with lherzolite. Most likely, the formation of kimberlite-like melts relatively enriched in SiO2 requires an additional source of heat from mantle plumes and probably H2O fluid.
UR - http://www.scopus.com/inward/record.url?scp=84969930808&partnerID=8YFLogxK
U2 - 10.1134/S1028334X16030181
DO - 10.1134/S1028334X16030181
M3 - Article
AN - SCOPUS:84969930808
VL - 467
SP - 303
EP - 307
JO - Doklady Earth Sciences
JF - Doklady Earth Sciences
SN - 1028-334X
IS - 1
ER -
ID: 25724830