Microcrystalline diamonds in the oceanic lithosphere and their nature


Дәйексөз келтіру

Толық мәтін

Ашық рұқсат Ашық рұқсат
Рұқсат жабық Рұқсат берілді
Рұқсат жабық Тек жазылушылар үшін

Аннотация

The carbon isotope composition of microdiamonds found in products of the Tolbachik Volcano eruption, Kamchatka (porous lavas and ash), was studied. The isotope composition of microdiamonds (with an average value of δ13C =–25.05‰) is close to that of microsized carbon particles in lavas (from–28.9 to–25.3‰). The general peculiarities of the diamond-forming environment include (1) no evidence for high pressure in the medium; (2) a reduced environment; and (3) mineralogical evidence for the presence of a fluid. The geochemical data characterizing the type of diamonds studied allow us to suggest that they were formed in accordance with the mechanism of diamond synthesis during cavitation in a rapidly migrating fluid, which was suggested by E.M. Galimov.

Авторлар туралы

E. Galimov

Vernadsky Institute of Geochemistry and Analytical Chemistry

Хат алмасуға жауапты Автор.
Email: galimov@geokhi.ru
Ресей, ul. Kosygina 19, Moscow, 117975

V. Sevastyanov

Vernadsky Institute of Geochemistry and Analytical Chemistry

Email: galimov@geokhi.ru
Ресей, ul. Kosygina 19, Moscow, 117975

G. Karpov

Institute of Volcanology and Seismology, Far East Branch

Email: galimov@geokhi.ru
Ресей, Piipia bulv. 9, Petropavlovsk-Kamchatsky, 683006

S. Shilobreeva

Vernadsky Institute of Geochemistry and Analytical Chemistry

Email: galimov@geokhi.ru
Ресей, ul. Kosygina 19, Moscow, 117975

A. Maksimov

Institute of Volcanology and Seismology, Far East Branch

Email: galimov@geokhi.ru
Ресей, Piipia bulv. 9, Petropavlovsk-Kamchatsky, 683006

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