DOI: 10.1029/97jb01641. Experimental melting curve of iron revisited

Experimental melting curve of iron revisited

10.1029/97jb01641

Crossref journal-article

American Geophysical Union (AGU)

Journal of Geophysical Research: Solid Earth (13)

Abstract

With new experimental data presented in the last 2 years, it becomes possible to resolve conflicts in the data sets used in constructing the melting curve of iron,Tm(P). On the basis of these new data, several data sets have been dropped: theWilliams et al.[1987] melting curve up to 100 GPa and the Bass et al [1987] andYoo et al.[1993] shock‐wave‐derivedTm(P) in the 200–300 GPa range based on light emissivity measurements. TheBoehler[1993]Tm(P) curve to 200 GPa and theBrown and McQueen[1986] shock‐wave‐determinedTm(240) remain, leaving a gap between 240 and 330 GPa. We fill this gap using the Lindemann law of melting. The Lindemann law and the temperature values along theBrown and McQueen[1986] Hugoniot require the value of the Grüneisen ratio, γ; thus γ connectsTmat 330 GPa withTmfound for values of the Hugoniot. It is further shown that the heat of crystallization, ΔHm, is dependent on γ. Thus, through 7, a connection is made between the melting curve and the power generated within the inner core. The effect of all these connections of physical properties through γ leads us to recommend 5600–6500 K as theTmof iron at inner‐outer core boundary conditions.Though argument continues concerning the amount and nature of alloying elements, there remains little ground for doubting that both inner and outer cores consist mainly of iron.

Bibliography

Anderson, O. L., & Duba, A. (1997). Experimental melting curve of iron revisited. Journal of Geophysical Research: Solid Earth, 102(B10), 22659â22669. Portico.

Authors 2

Orson L. Anderson (first)
Al Duba (additional)

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Dates

Type	When
Created	21 years, 7 months ago (Feb. 3, 2004, 6:26 p.m.)
Deposited	1 year, 7 months ago (Jan. 11, 2024, 11:31 p.m.)
Indexed	2 weeks, 3 days ago (Aug. 19, 2025, 7 a.m.)
Issued	27 years, 10 months ago (Oct. 10, 1997)
Published	27 years, 10 months ago (Oct. 10, 1997)
Published Online	27 years, 10 months ago (Oct. 10, 1997)
Published Print	27 years, 10 months ago (Oct. 10, 1997)

Funders 0

None

BibTeX

@article{Anderson_1997, title={Experimental melting curve of iron revisited}, volume={102}, ISSN={0148-0227}, url={http://dx.doi.org/10.1029/97jb01641}, DOI={10.1029/97jb01641}, number={B10}, journal={Journal of Geophysical Research: Solid Earth}, publisher={American Geophysical Union (AGU)}, author={Anderson, Orson L. and Duba, Al}, year={1997}, month=oct, pages={22659–22669} }

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