High-pressure experiments provide insights into the Mantle Transition Zone history of chromitite in Tibetan ophiolites
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چکیده
منابع مشابه
High-pressure phase of brucite stable at Earth's mantle transition zone and lower mantle conditions.
We investigate the high-pressure phase diagram of the hydrous mineral brucite, Mg(OH)2, using structure search algorithms and ab initio simulations. We predict a high-pressure phase stable at pressure and temperature conditions found in cold subducting slabs in Earth's mantle transition zone and lower mantle. This prediction implies that brucite can play a much more important role in water tran...
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Mineral properties in Earth's lower mantle are affected by iron electronic states, but representative pressures and temperatures have not yet been probed. Spin states of iron in lower-mantle ferropericlase have been measured up to 95 gigapascals and 2000 kelvin with x-ray emission in a laser-heated diamond cell. A gradual spin transition of iron occurs over a pressure-temperature range extendin...
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High–pressure and high–temperature experiments were conducted to determine the stability field of phase Egg, AlSiO3OH, in the pressure range of 16.5–23.5 GPa and in the temperature range of 800–1500 °C. We found that phase Egg decomposes to δ–AlOOH + stishovite below ~ 1200 °C (16.5 GPa and 800 °C; 20.6 GPa and 1000 °C) and to Al–phase D + corundum + stishovite above ~ 1200 °C (21.8 GPa and 150...
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ژورنال
عنوان ژورنال: Earth and Planetary Science Letters
سال: 2017
ISSN: 0012-821X
DOI: 10.1016/j.epsl.2017.01.036