EXPERIMENTAL STUDY OF DIAMOND CRYSTALLIZATION IN CARBONATE-CARBON SYSTEMS IN CONNECTION WITH THE PROBLEM OF DIAMOND GENESIS IN MAGMATIC AND METAMORPHIC ROCKS
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dc.contributor.author | Pal'yanov Yu.N. | |
dc.contributor.author | Sokol A.G. | |
dc.contributor.author | Borzdov Yu.M. | |
dc.contributor.author | Sobolev N.V. | |
dc.date.accessioned | 2021-01-01T08:57:33Z | |
dc.date.available | 2021-01-01T08:57:33Z | |
dc.date.issued | 1998 | |
dc.identifier | https://elibrary.ru/item.asp?id=14997170 | |
dc.identifier.citation | Geologiya i geofizika, 1998, , 12, 1780-1792 | |
dc.identifier.issn | 0016-7886 | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/21961 | |
dc.description.abstract | Diamond crystallization in carbonate-carbon systems was studied on a "split sphere" device BARS at P = 7 GPa and T = 1700-1750°C (experiment time 18.5 h). It has been established that the heterogeneous nucleation of diamond in the studied systems is realized both at the melt-graphite interface and in the bulk of a carbon-saturated carbonate melt. Regular sequences of the catalytic activities of alkali and alkali-earth carbonates have been determined - Li2CO3 >Na2CO3 >K2CO3 >Cs2CO3 and CaMg(CO3)2>CaCO3 >MgCO3> SrCO3, respectively. It is experimentally shown that diamond nucleation strongly depends on kinetic factors. A possible decrease in the minimum PT-parameters of diamond synthesis in carbonate-carbon systems is justified. Analysis of the results on diamond synthesis together with petrological data suggests that carbonate and carbonate-silicate melt-fluids are the most probable medium of natural diamond formation in deep magmatic and metamorphic processes. | |
dc.title | EXPERIMENTAL STUDY OF DIAMOND CRYSTALLIZATION IN CARBONATE-CARBON SYSTEMS IN CONNECTION WITH THE PROBLEM OF DIAMOND GENESIS IN MAGMATIC AND METAMORPHIC ROCKS | |
dc.type | Статья |
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