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Fig. 4 | Progress in Earth and Planetary Science

Fig. 4

From: Melting relations in the Fe–S–Si system at high pressure and temperature: implications for the planetary core

Fig. 4

The melting curves of Fe and Fe-light element systems. Temperature profiles of the cores of Mars and Mercury are also shown. The bold solid lines are Sol and Liq, which show the solidus and liquidus temperatures of the Fe80.1S12.7Si7.2 composition in the Fe–S–Si system. The adiabatic temperature of the core of Mercury estimated by this work, 27 K/GPa, is given as a red curve, S, under the assumption that the temperature at CMB of Mercury is 1800 K (e.g., Dumberry and Rivoldini 2015; Malavergne et al. 2010). The temperature profiles of the Martian core estimated by Fei and Bertka (2005), and Mercury’s core by Dumberry and Rivoldini (2015) are also shown as FB and DR, respectively. The previously reported melting curves of Fe-light element systems and solidus of peridotite are shown in this figure as follows. Melting curve of Fe by Anzellini et al. (2013) is labeled as FeA; melting curve of Fe–Si by Asanuma et al. (2010) is labeled as Fe–SiA; solidus of the Fe–S system reported by Kamada et al. (2012) is labeled as Fe–S K; liquidus of Fe–S by Chen et al. (2008) is labeled as Fe–S C; solidus and liquidus temperatures for a composition of Fe75O5S20 reported by Terasaki et al. (2011) are labeled as Fe-O-S(S) and Fe-O-S(L), respectively. Also the eutectic of the Fe–S system by Campbell et al. (2007) is Fe–S CP; the eutectic of Fe–S by Morard et al. (2008) is Fe–S M; the eutectic of Fe-FeS by Chudinovskikh and Borhler (2007) is Fe–S CB; the solidus temperature of peridotite by Fiquet et al. (2010) is labeled as Peridotite F and that by Zhang and Herzberg (1994) is labeled as Peridotite ZH. The pressure conditions for the cores of Mercury and Mars are shown as shaded areas, yellow and gray, respectively

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