Eutectic melting in the system Fe–S to 44 GPa

Chudinovskikh, L.; Boehler, R.

doi:10.1016/j.epsl.2007.02.024

Cited by 78 publications

(49 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…I parameterize the liquidus temperature as a function of composition for high iron concentrations using the Fe-FeS eutectic compositions and temperatures investigated as a function of pressure from various sources (Buono and Walker 2015;Chudinovskikh and Boehler 2007;Fei et al 1997, 2000, Morard et al 2008. The pressure and compositionally dependent melting temperature is parameterized as…”

Section: Methods Usedmentioning

confidence: 99%

Mars core structure—concise review and anticipated insights from InSight

Helffrich

2017

Prog Earth Planet Sci

View full text Add to dashboard Cite

This review summarizes the knowledge of Mars' interior structure, its inferred composition, and the anticipated seismological properties arising from its composition with particular focus on Mars' core. The emphasis on the core stems from the unusual morphology of the liquidus diagram of iron at moderate pressures when enriched in sulfur. From a fairly detailed liquidus diagram constructed from experimental studies, I identify a set of processes that could act within Mars' core: an iron "snow" from the core-mantle boundary's surface and a Fe 3−x S 2 "ground fog" forming at the base of the core. Depending on temperature and bulk sulfur composition, these could form an inner core or could stratify the outer core by enriching it in sulfur, or both. Core stratification could be one explanation for the extinction of Mars' magnetic field early in the planet's history, and I demonstrate the feasibility of this mechanism. The crystallization processes in the core could be observable in the seismic data that the future Mars geophysical mission, InSight, is planned to provide. The core size, the presence of an inner core, and the wavespeed profile of the outer core, whose radial derivative provides a proxy for changes in composition, are key observables to seek.

show abstract

Section: Methods Usedmentioning

confidence: 99%

Mars core structure—concise review and anticipated insights from InSight

Helffrich

2017

Prog Earth Planet Sci

View full text Add to dashboard Cite

show abstract

“…In addition, the present liquidus curve in Fe-Si-S is lower than the melting temperature in the Fe-Si alloy reported by Asanuma et al (2010) and close to the liquidus of the Fe-S-O system ). The present solidus of the Fe-S-Si system is very close to the eutectic temperature of the Fe-S system (Campbell et al 2007;Chudinovskikh and Boehler 2007;Morard et al 2008: Kamada et al 2012) and the solidus of the Fe-S-O system ) within experimental uncertainties. This result indicates that the effect of the addition of Si and O on the depression of eutectic temperatures in the Fe-S system is very small.…”

Section: Solidus and Liquidus Temperatures In The Fe-s-si Systemmentioning

confidence: 48%

“…Thus, the present results on the solidus and liquidus temperatures can be applicable to the core formation processes in the terrestrial planets. Figure 4 summarizes the liquidus and solidus temperatures of iron-light element systems (Campbell et al 2007;Chudinovskikh and Boehler 2007;Morard et al 2008;Asanuma et al 2010;Terasaki et al 2011;Kamada et al 2012) and peridotite (Fiquet et al 2010;Zhang and Herzberg 1994). The liquidus temperature in this study is about 500 K lower than that of pure Fe (Anzellini et al 2013;Ma et al 2004).…”

Section: Solidus and Liquidus Temperatures In The Fe-s-si Systemmentioning

confidence: 99%

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

Sakairi

Ohtani

Kamada

et al. 2017

Prog. in Earth and Planet. Sci.

View full text Add to dashboard Cite

The phase and melting relations in the Fe-S-Si system were determined up to 60 GPa by using a double-sided laser-heated diamond anvil cell combined with X-ray diffraction. On the basis of the X-ray diffraction patterns, we confirmed that hcp/fcc Fe-Si alloys and Fe 3 S are stable phases under subsolidus conditions in the Fe-S-Si system. Both solidus and liquidus temperatures are significantly lower than the melting temperature of pure Fe and both increase with pressure. The slopes of the Fe-S-Si liquidus and solidus curves determined here are smaller than the adiabatic temperature gradients of the liquid cores of Mercury and Mars. Thus, crystallization of their cores started at the core-mantle boundary region.

show abstract

“…Fei et al (1997Fei et al ( , 2000). Morard et al (2007); Usselman (1975); Stewart et al (2007); Chudinovskikh and Boehler (2007) (adaptédeFeietal. (1997(adaptédeFeietal.…”

Section: Figure 4: Critère De Fusionàh a U T Ep :A P P A R I T I O Ndmentioning

confidence: 99%

High-pressure experimental geosciences: state of the art and prospects

Sanloup¹

2012

Bulletin De La Société Géologique De France

View full text Add to dashboard Cite

International audienceThis paper aims at reviewing the current advancements of high pressure experimental geosciences. The an- gle chosen is that of in situ measurements at the high pressure (P) and high temperature (T) conditions relevant of the deep Earth and planets, measurements that are often carried out at large facilities (X-ray synchrotrons and neutron sources). Rather than giving an exhaustive catalogue, four main active areas of research are chosen: the latest advance- ments on deep Earth mineralogy, how to probe the properties of melts, how to probe Earth dynamics, and chemical reac- tivity induced by increased P-T conditions. For each area, techniques are briefly presented and selected examples illustrate their potentials, and what that tell us about the structure and dynamics of the planet

show abstract

Eutectic melting in the system Fe–S to 44 GPa

Cited by 78 publications

References 20 publications

Mars core structure—concise review and anticipated insights from InSight

Mars core structure—concise review and anticipated insights from InSight

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

High-pressure experimental geosciences: state of the art and prospects

Contact Info

Product

Resources

About