scholarly journals Diamond crystallization in carbonate-silicate systems: implications for naturall diamond genesis

2019 ◽  
Keyword(s):  
Diamond Genesis ◽  
Diamond Crystallization

scholarly journals Diamond formation in an electric field under deep Earth conditions

2021 ◽  
Vol 7 (4) ◽  
pp. eabb4644
Author(s):  
Yuri N. Palyanov ◽  
Yuri M. Borzdov ◽  
Alexander G. Sokol ◽  
Yuliya V. Bataleva ◽  
Igor N. Kupriyanov ◽  
...  
Keyword(s):  
Electric Fields ◽  
Lithospheric Mantle ◽  
Isotope Fractionation ◽  
Diamond Formation ◽  
Mantle Minerals ◽  
Electrochemical Processes ◽  
Mantle Mineral ◽  
Deep Earth ◽  
Diamond Crystallization ◽  
Global Carbon

Most natural diamonds are formed in Earth’s lithospheric mantle; however, the exact mechanisms behind their genesis remain debated. Given the occurrence of electrochemical processes in Earth’s mantle and the high electrical conductivity of mantle melts and fluids, we have developed a model whereby localized electric fields play a central role in diamond formation. Here, we experimentally demonstrate a diamond crystallization mechanism that operates under lithospheric mantle pressure-temperature conditions (6.3 and 7.5 gigapascals; 1300° to 1600°C) through the action of an electric potential applied across carbonate or carbonate-silicate melts. In this process, the carbonate-rich melt acts as both the carbon source and the crystallization medium for diamond, which forms in assemblage with mantle minerals near the cathode. Our results clearly demonstrate that electric fields should be considered a key additional factor influencing diamond crystallization, mantle mineral–forming processes, carbon isotope fractionation, and the global carbon cycle.

Effects of Fe additive on diamond crystallization from carbonyl nickel powders-C system under HPHT condition

2015 ◽  
Vol 24 (8) ◽  
pp. 088104
Author(s):  
Yong Li ◽  
Xiao-Peng Jia ◽  
Yun-Guang Feng ◽  
Chao Fang ◽  
Li-Juan Fan ◽  
...  
Keyword(s):  
Carbonyl Nickel ◽  
Nickel Powders ◽  
Diamond Crystallization

Diamond crystallization mechanisms

1990 ◽  
Vol 26 (3) ◽  
pp. 362-365
Author(s):  
V. Ya. Slobodskoi ◽  
V. V. Sobolev ◽  
P. N. Baranov
Keyword(s):  
Diamond Crystallization

Diamond crystallization in nature

1987 ◽  
Vol 23 (1) ◽  
pp. 83-86 ◽  
Author(s):  
V. V. Sobolev
Keyword(s):  
Diamond Crystallization

Diamond crystallization with a carbonyl nickel catalyst under high pressure and temperature

CrystEngComm ◽  
2016 ◽  
Vol 18 (11) ◽  
pp. 1924-1932 ◽  
Author(s):  
Xiaobing Liu ◽  
Xiaopeng Jia ◽  
Ming Zhao ◽  
Hong-An Ma
Keyword(s):  
High Pressure ◽  
Nickel Catalyst ◽  
High Pressure And Temperature ◽  
Carbonyl Nickel ◽  
Diamond Crystallization
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