Solidification of lunar core from melting experiments on the Fe–Ni–S system

Liu, Jiachao; Li, Jie

doi:10.1016/j.epsl.2019.115834

Cited by 12 publications

(7 citation statements)

References 53 publications

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“…In other words, adding a small amount of Ni has a large effect in depressing the melting point, but increasing the amount of Ni shifts the liquidus curve towards the Ni-free system. To date, the (Fe, Ni)-S liquidus and eutectic have been investigated in systems with different concentrations of Ni, and therefore the results are not directly comparable (Stewart et al, 2007;Zhang and Fei, 2008;Morard et al, 2011;Mori et al, 2017;Liu and Li, 2019;Gilfoy and Li, 2020). Therefore, a range of Ni concentrations needs to be explored to constrain how different concentrations of Ni impact the Fe-S liquidus.…”

Section: (Fe Ni)-s Liquidus Curves At 51 Gpa To 40 Gpamentioning

confidence: 99%

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Liquidus determination of the Fe-S and (Fe, Ni)-S systems at 14 and 24 GPa: Implications for the Mercurian core

Pease

2022

Earth and Planetary Science Letters

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Section: (Fe Ni)-s Liquidus Curves At 51 Gpa To 40 Gpamentioning

confidence: 99%

“…However, literature for the (Fe, Ni)-S system is limited and full of uncertainties. There are four primary (Fe, Ni)-S liquidus studies 5.1, 20, 23, and 40 GPa (Stewart et al, 2007;Pommier et al, 2018;Liu and Li, 2019;Gilfoy and Li, 2020). predictions can be found in section 6.4.…”

Section: Uncertainties In (Fe Ni)-s Solidification Modelsmentioning

confidence: 99%

Liquidus determination of the Fe-S and (Fe, Ni)-S systems at 14 and 24 GPa: Implications for the Mercurian core

Pease

2022

Earth and Planetary Science Letters

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“…In our model, the evolution of the lunar core includes inner core growth and energy balance with the convective mantle (Li et al., 2019; Scheinberg et al., 2018; Zhang et al., 2013a). We consider the lunar core to consist of a Fe‐FeS binary system with 5 wt.% S. Although other elements such as Ni, C, and P may also be present in the lunar core (e.g., Liu & Li, 2020; Righter et al., 2017; Zhai et al., 2022), the binary Fe‐FeS system is sufficient to capture the geophysical inference of the lunar core (e.g., Antonangeli et al., 2015; Jing et al., 2014; Weber et al., 2011). The phase equilibria of the binary Fe‐FeS system are more extensively studied (e.g., Buono & Walker, 2011; Morard & Rivoldini, 2018).…”

Section: Model Setupmentioning

confidence: 99%

The Effect of Pressure‐Dependent Viscosity on the Dynamics of the Post‐Overturn Lunar Mantle

Zhang,

Liang

et al. 2023

JGR Planets

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Mare‐basalt volcanism is concentrated on the lunar nearside. A plausible explanation for this asymmetric distribution is long‐wavelength (spherical harmonic degree‐1) mantle convection driven by upwellings of the overturned ilmenite‐bearing magma ocean cumulates (IBCs). The pattern of lunar mantle convection depends in part on the rheological properties of ilmenite. This study explores the effect of pressure‐dependent ilmenite viscosity on the instability of an overturned IBC layer initially at the core‐mantle boundary and the pattern of lunar mantle convection through three‐dimensional numerical simulations. We show that the convective patterns are sensitive to the activation volume for viscous flow. An effective activation volume of 10 cm3/mol would reduce the internal convection in the overturned IBC layer and promote the hemispherical upwelling. However, when the activation volume is too small, vigorous convection in the overturned IBC layer would inhibit heat from concentrating on one hemisphere. When the activation volume is too large, the size of the upwelling plumes is restricted, preventing a stable long‐wavelength structure in the upper mantle. Decompression melting during asymmetric upwelling would produce the localization of mare basalts on the lunar surface.

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“…Urban sprawl and its reasons have been discussed by many authors (e.g., by Bhatta (2010) who provided a table of 30 reasons), among which continued population growth is an important factor in the expansion of urban agglomerations (Masanobu, 2021). Therefore, human-land coordination and environmental sustainability (HLC&ES) are key research fields on USL optimization (Liu, 2020;Ma et al, 2022). Many researchers have conducted a lot of research in this field, such as Ma et al (2022) believed that coordinating the land use of urban agglomerations can reduce the pressure on central cities and promote the growth of underdeveloped cities.…”

Section: Introductionmentioning

confidence: 99%

“…Specifically, we focus on analyzing the trend of urban expansion, the characteristics of the multi-model transportation network, and the spatial distribution of population and economy, and demonstrate the lack of conditions for the coordinated development of each CG. Based on Human-land Coordination Theory (Liu, 2020), an optimization scheme for urban system layout is proposed in CCEC.…”

Section: Introductionmentioning

confidence: 99%

An approach to urban system spatial planning in Chengdu Chongqing economic circle using geospatial big data

Wang,

Kong,

Luo

et al. 2023

Front. Earth Sci.

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Evidence suggests city grouping is an important way to implement urbanization in China. However, the Chengdu-Chongqing Economic Circle (CCEC) is a typical dual-core structure, and the development level of each city is different. If we do not focus on the key directions for urban development, it will not be conducive to the new-type urbanization process. Therefore, we use spatial analysis techniques and geographic big data sets to construct an approach for urban system layout optimization from a global perspective. It mainly includes urban extended trend analysis based on night light, multi-modal traffic network analysis, and spatial economic density analysis using Open Street Map (OSM) and Point of Interest (POI) data. The research results show the following interesting findings. Firstly, the historical relationship of cities has a significant impact on city grouping, and efficient transportation connections and prosperous enterprise distribution are key conditions for urban grouping during the acceleration period of urbanization. Secondly, the development of urban grouping should break through administrative restrictions and achieve a moderate separation of administrative divisions and economic divisions. It is beneficial to the rapid growth of the city group and the improvement of the internal structure. Thirdly, the urban group of Southern Sichuan and Western Chongqing (SSWC) is the region with the most potential for growth in CCEC. The urban expansion index (UEI) of the Yibin-Luzhou area is 2.16, and the spatial economic density has increased by 130/km2 in the past decade. Providing flexible development authority and focus on the construction of the Yibin-Luzhou Urban Belt along the Yangtze River is an important way to integrate southern Sichuan. Moreover, we found the UEI has a good universality and it can be used for studying urban expansion trends and city relationships in rapidly developing regions, especially in metropolitan areas or urban agglomeration.

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Solidification of lunar core from melting experiments on the Fe–Ni–S system

Cited by 12 publications

References 53 publications

Liquidus determination of the Fe-S and (Fe, Ni)-S systems at 14 and 24 GPa: Implications for the Mercurian core

Liquidus determination of the Fe-S and (Fe, Ni)-S systems at 14 and 24 GPa: Implications for the Mercurian core

The Effect of Pressure‐Dependent Viscosity on the Dynamics of the Post‐Overturn Lunar Mantle

An approach to urban system spatial planning in Chengdu Chongqing economic circle using geospatial big data

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