Jul 14, 1995 1. Science. 1995 Jul 14;269(5221):216-8. Flotation of diamond in mantle melt at high pressure. Suzuki A, Ohtani E, Kato T. Experiments show that diamond floats in a primitive mantle melt at around 20 gigapascals and 2360 degrees C and in a melt formed by partial melting of the transition zone at about 16 gigapascals and 2270 degrees C.
High-pressure etching of diamond in chloride melt in the presence of aqueous fluid ... of metal melt in relation to diamonds, thus, stimulating their preservation in the Earth’s mantle ...
Jan 13, 2017 Diamond is an evidence for carbon existing in the deep Earth. Some diamonds are considered to have originated at various depth ranges from the mantle transition zone to the lower mantle. These ...
The significance of this for diamond formation is that the bottom 100 km of the mantle keel under each old continental crustal region is at high enough pressure and comparatively low temperature to allow diamonds to crystallize whenever they receive fluids saturated in carbon from the underlying convecting mantle.
Nov 30, 2001 E. Ohtani, A. Suzuki, T. Kato, Flotation of olivine and diamond in mantle melt at high pressure: Implications for fractionation in deep mantle and ultradeep origin of diamond, in: M.H. Manghnani, T. Yagi (Eds.), High Pressure Research: Properties of Earth and Planetary Materials at High Pressure and Temperature, Geophys.
Jun 19, 2019 The submergence of the earth's crust has to happen quickly so that the diamond can form before the sediment starts to melt at temperatures over 800 degrees Celsius, and react with the cratonic mantle.
Nov 05, 2021 Diamond etching in high-temperature ambient-pressure experiments has been performed aimed to assess possible postimpact effects on diamonds in impact craters, for the case of the Popigai crater in Yakutia (Russia). The experiments with different etchants, including various combinations of silicate melts, air, and inert gases, demonstrated the diversity of microstructures on {111} diamond …
Dec 27, 2017 Ohtani E, Suzuki A, Kato T (1998) Flotation of olivine and diamond in mantle melt at high pressure: implications for fractionation in the deep mantle and ultradeep origin of diamond. In: Manghnani MH, Yagi T (eds) Properties of Earth and planetary materials at high pressure and temperature. Geophysical monograph, vol 101.
The principal sources of natural diamonds are peridotitic (about 2/3 of diamonds) and eclogitic (1 / 3) domains located at 140–200 km depth in the subcratonic lithospheric mantle. There,
May 29, 2007 In this series of experiments, diamond crystallized by film growth (FG) and temperature-gradient growth (TGG) mechanisms. In the first case, the driving force for the crystallization was a difference in solubility of graphite and diamond in the melt, with constant P,t (pressure and temperature). In the second case, diamond crystallization was driven by the difference in solubility of …
Flotation of olivine and diamond in mantle melt at high pressure: Implications for fractionation in the deep mantle and ultradeep origin of diamond. In M. H. Manghnani, & T. Yagi (Eds.), Properties of Earth and Planetary Materials at High Pressure and Temperature, 1998 (pp. 227-239). (Geophysical Monograph Series; Vol. 101).
The eutectic will move closer to the nepheline (Al-rich) eutectic and away from the Qz eutectic at high pressures. Also decompression melting vs. melting from a plume can trigger different levels of partial melting at different places in the mantle that also determine the basalt type formed.
Jul 14, 1995 Experiments show that diamond floats in a primitive mantle melt at around 20 gigapascals and 2360 C and in a melt formed by partial melting of the transition zone at about 16 gigapascals and 2270 C. These observations constrain magma densities at high pressure. Diamond precipitated or trapped in a silicate melt at the base of the transition zone or the lower mantle floats …
Experiments show that diamond floats in a primitive mantle melt at around 20 gigapascals and 2360 degrees C and in a melt formed by partial melting of the transition zone at about 16 gigapascals and 2270 degrees C. These observations constrain magma densities at high pressure. Diamond …
Jul 01, 1995 Experiments show that diamond floats in a primitive mantle melt at around 20 gigapascals and 2360^circC and in a melt formed by partial melting of the transition zone at about 16 gigapascals and 2270^circC. These observations constrain magma densities at high pressure. Diamond precipitated or trapped in a silicate melt at the base of the transition zone or the lower mantle …
