RAMAN-GEOTHERMOMETER FOR CARBONACEOUS CHONDRITES

S. А. Voropaev; Воропаев С. А.; A. P. Krivenkо; Кривенко А. П.; N. V. Dushenkо; Душенко Н. В.

doi:10.31857/S2686740023050139

RAMAN-GEOTHERMOMETER FOR CARBONACEOUS CHONDRITES

作者: Voropaev S.А.¹, Krivenkо A.P.¹, Dushenkо N.V.¹
隶属关系:
1. Vernadsky Institute of Geochemistry and Analytical Chemistry of the Russian Academy of Sciences
期: 卷 512, 编号 1 (2023)
页面: 69-72
栏目: ТЕХНИЧЕСКИЕ НАУКИ
URL: https://journals.rcsi.science/2686-7400/article/view/232981
DOI: https://doi.org/10.31857/S2686740023050139
EDN: https://elibrary.ru/HWLJXD
ID: 232981

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详细

Samples of the Murchison meteorite (carbonaceous chondrite, type CM2) were kept isothermally in a specially designed device at temperatures of 200, 500 and 800°C. After the samples cooled down in an inert helium atmosphere, Raman scattering spectra were taken. An increase in the intensity of the G- and D-lines of graphite was detected depending on the degree of heating. It is shown that using such a characteristic parameter of these lines as the area ratio, S_D/S_G, it is possible to define a geothermometer to determine the maximum temperature of thermal metamorphism of the parent bodies of carbonaceous chondrites. A comparison with the known data for carbonaceous chondrite Allende (CM3), which has experienced a significant thermal metamorphism, is carried out.

关键词

carbonaceous chondrites, degassing, carbon, Moon, Raman spectra

参考

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