The fate of nitrogen during core-mantle separation on Earth

Grewal, Damanveer S.; Dasgupta, Rajdeep; Holmes, A. K.; Costin, Gelu; Li, Yuan; Tsuno, K.

doi:10.1016/j.gca.2019.02.009

Cited by 40 publications

(99 citation statements)

References 114 publications

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“…We completed independent series of experiments to quantify the P-T-X controls on N partitioning between liquid metal and silicate ( , atomic fraction, Figure 3, (Figure 3b, Supplementary Figures 1 and 2). Our ƒO 2 and temperature findings accord with previous work [24][25][26] . We also find that has a negative effect on values, but this effect is not significant at the % confidence level in our dataset (p-value = 0.12, Supplementary Figure 2).…”

Section: High P-t Metal-silicate Partitioning Experiments For Nitrogensupporting

confidence: 93%

“…Silicon nitride was used as the standard (MTI Corporation) for N analysis, following the approach of 23. No evidence for N mobility under the electron beam was observed, in agreement with other studies of N partitioning that employed similar analytical techniques 23,25 .…”

Section: High P-t Metal-silicate Partitioning Experiments For Nitrogensupporting

confidence: 90%

“…to literature data to validate its predictive power (Supplementary Figure 3). We predict literature data 20,22,25,26 Figure 4).…”

Section: High P-t Metal-silicate Partitioning Experiments For Nitrogenmentioning

confidence: 99%

“…This result implies that core formation under the P-T conditions associated with larger terrestrial planets, such as Earth, is an efficient mechanism to increase S/N and C/N ratios in observable reservoirs by preferentially sequestering N to the core. Previous work has also identified that values increase with pressure (P/T) 20,24,25 , but experiments were limited to more moderate conditions and application to core formation in Earth required correspondingly large pressure extrapolation.…”

Section: High P-t Metal-silicate Partitioning Experiments For Nitrogenmentioning

confidence: 99%

“…Core formation fractionates elements on the basis of their preference for the metallic phase. For the relatively low pressure and temperature (P-T) conditions associated with core formation in planetesimals, sulfur and carbon both display a greater preference for the metal phase (more siderophile behavior) than nitrogen e.g., [18][19][20][21][22][23][24][25][26] , provided planetesimal S and C concentrations remain at levels associated with planets 27 . Strongly siderophile S and C would lead to low S/N and C/N observable ratios for planetesimals, the opposite of what is observed for Earth 2,5,6 .…”

Section: Introductionmentioning

confidence: 99%

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Core formation and magma ocean outgassing set planetary N-S-C ratios

Jackson

Cottrell

et al. 2020

Preprint

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Earth’s volatile elements cannot be accounted for as mixtures of different chondrites, despite their clear chondritic heritage. Early-acting, but as yet unidentified, processes apparently fractionated volatile elements now contained by planets. Here we test the hypothesis that planetary-scale differentiation, namely core formation and primordial atmosphere degassing, set Earth’s distribution of N, S, and C. To this end, we report new metal-silicate partitioning experiments on N up to 26 GPa and 3400 K; the highest pressure and temperatures conditions yet explored. Our results highlight a strong, positive effect of pressure on nitrogen partitioning into cores. We apply our new experiments with literature data for S and C partitioning to a model that couples core formation with degassing into the primordial atmosphere, to demonstrate that volatile elements ratios for Earth, and potentially Mars and Venus, can be set by primordial differentiation under conditions that also satisfy their moderately siderophile element budgets.

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Section: High P-t Metal-silicate Partitioning Experiments For Nitrogensupporting

confidence: 93%

Section: High P-t Metal-silicate Partitioning Experiments For Nitrogensupporting

confidence: 90%

“…to literature data to validate its predictive power (Supplementary Figure 3). We predict literature data 20,22,25,26 Figure 4).…”

Section: High P-t Metal-silicate Partitioning Experiments For Nitrogenmentioning

confidence: 99%

Section: High P-t Metal-silicate Partitioning Experiments For Nitrogenmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Core formation and magma ocean outgassing set planetary N-S-C ratios

Jackson

Cottrell

et al. 2020

Preprint

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The Diverse Planetary Ingassing/Outgassing Paths Produced over Billions of Years of Magmatic Activity

et al. 2021

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Nitrogen solubility in basaltic silicate melt - Implications for degassing processes

et al. 2021

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The fate of nitrogen during core-mantle separation on Earth

Cited by 40 publications

References 114 publications

Core formation and magma ocean outgassing set planetary N-S-C ratios

Core formation and magma ocean outgassing set planetary N-S-C ratios

The Diverse Planetary Ingassing/Outgassing Paths Produced over Billions of Years of Magmatic Activity

Nitrogen solubility in basaltic silicate melt - Implications for degassing processes

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