Mineralogy of the Martian interior up to core‐mantle boundary pressures

Bertka, C. M.; Fei, Yingwei

doi:10.1029/96jb03270

Cited by 324 publications

(307 citation statements)

References 51 publications

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“…The same experimental techniques were applied as Hirose et al [2001]. We used a high-pressure 8/3 assembly with a cylindrical Re-heater (25-•um thickness), similar to that described in Bertka and Fei [1997] To avoid kinetic problems, we took the glass sample to a P-T condition of interest, and kept that condition (constant load force of the apparatus and temperature) for 4-60 rains while repeatedly taking diffraction patterns of the pressure maker. Pressure dropped by 0.18-0.48 GPa during heating (Table 1) …”

Section: Methodsmentioning

confidence: 99%

In situ measurements of the majorite‐akimotoite‐perovskite phase transition boundaries in MgSiO₃

Hirose¹,

Komabayashi²,

Murakami³

et al. 2001

Geophysical Research Letters

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Section: Methodsmentioning

confidence: 99%

In situ measurements of the majorite‐akimotoite‐perovskite phase transition boundaries in MgSiO₃

Hirose¹,

Komabayashi²,

Murakami³

et al. 2001

Geophysical Research Letters

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“…Temperature calibrations using pyroxene thermometry have been previously described for this assembly [Bertka and Fei, 1997]. Along a typical 0.5 mm capsule length the thermal gradient was found to be <40øC.…”

Section: Multianvil Apparatusmentioning

confidence: 99%

“…The experimental temperature was monitored using a W5%Re-W26%Re (type C) thermocouple that was inserted axially into the octahedral assembly, with the hot junction in contact with the experimental capsule. Further details of the experimental assembly are reported by Bertka and Fei [ 1997].…”

Section: Multianvil Apparatusmentioning

confidence: 99%

“…The capsules were then carefully compressed, using a die, to a length of approximately 0.8 mm in order to minimize the thermal gradient along the capsule during the experiment. The experiments were conducted in a Walker-style split cylinder multianvil apparatus at the Geophysical Laboratory, Carnegie Institution of Washington [Bertka and Fei, 1997]. One inch Toshiba F-grade tungsten carbide anvils, with truncations of 3 mm edge length, were separated by compressible pyrophyllite gaskets.…”

Section: Multianvil Apparatusmentioning

confidence: 99%

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Stability of phase D at high pressure and high temperature

Frost¹,

Fei²

1998

J. Geophys. Res.

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133

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“…The relationship between oil pressure in the ram and sample pressure can be calibrated for the 18 mm OEL cast octahedral assembly described here using the procedures outlined by 41 . 10.…”

Section: Assembly Of the Componentsmentioning

confidence: 99%

Metal-silicate Partitioning at High Pressure and Temperature: Experimental Methods and a Protocol to Suppress Highly Siderophile Element Inclusions

Bennett

Brenan

Fei

2015

JoVE

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Estimates of the primitive upper mantle (PUM) composition reveal a depletion in many of the siderophile (iron-loving) elements, thought to result from their extraction to the core during terrestrial accretion. Experiments to investigate the partitioning of these elements between metal and silicate melts suggest that the PUM composition is best matched if metal-silicate equilibrium occurred at high pressures and temperatures, in a deep magma ocean environment. The behavior of the most highly siderophile elements (HSEs) during this process however, has remained enigmatic. Silicate run-products from HSE solubility experiments are commonly contaminated by dispersed metal inclusions that hinder the measurement of element concentrations in the melt. The resulting uncertainty over the true solubility and metal-silicate partitioning of these elements has made it difficult to predict their expected depletion in PUM. Recently, several studies have employed changes to the experimental design used for high pressure and temperature solubility experiments in order to suppress the formation of metal inclusions. The addition of Au (Re, Os, Ir, Ru experiments) or elemental Si (Pt experiments) to the sample acts to alter either the geometry or rate of sample reduction respectively, in order to avoid transient metal oversaturation of the silicate melt. This contribution outlines procedures for using the pistoncylinder and multi-anvil apparatus to conduct solubility and metal-silicate partitioning experiments respectively. A protocol is also described for the synthesis of uncontaminated run-products from HSE solubility experiments in which the oxygen fugacity is similar to that during terrestrial core-formation. Time-resolved LA-ICP-MS spectra are presented as evidence for the absence of metal-inclusions in run-products from earlier studies, and also confirm that the technique may be extended to investigate Ru. Examples are also given of how these data may be applied. Video LinkThe video component of this article can be found at

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Mineralogy of the Martian interior up to core‐mantle boundary pressures

Cited by 324 publications

References 51 publications

In situ measurements of the majorite‐akimotoite‐perovskite phase transition boundaries in MgSiO₃

In situ measurements of the majorite‐akimotoite‐perovskite phase transition boundaries in MgSiO₃

Stability of phase D at high pressure and high temperature

Metal-silicate Partitioning at High Pressure and Temperature: Experimental Methods and a Protocol to Suppress Highly Siderophile Element Inclusions

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Mineralogy of the Martian interior up to core‐mantle boundary pressures

Cited by 324 publications

References 51 publications

In situ measurements of the majorite‐akimotoite‐perovskite phase transition boundaries in MgSiO3

In situ measurements of the majorite‐akimotoite‐perovskite phase transition boundaries in MgSiO3

Stability of phase D at high pressure and high temperature

Metal-silicate Partitioning at High Pressure and Temperature: Experimental Methods and a Protocol to Suppress Highly Siderophile Element Inclusions

Contact Info

Product

Resources

About

In situ measurements of the majorite‐akimotoite‐perovskite phase transition boundaries in MgSiO₃

In situ measurements of the majorite‐akimotoite‐perovskite phase transition boundaries in MgSiO₃