Microcracks in Basalt and Tonalite at Friction
- Авторы: Vettegren V.1,2, Ponomarev A.1, Mamalimov R.1,2, Shcherbakov I.1, Arora K.3, Srinagesh D.3, Chadha R.3
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Учреждения:
- Schmidt Institute of Physics of the Earth, Russian Academy of Sciences
- Ioffe Physical Technical Institute, Russian Academy of Sciences
- CSIR: National Geophysical Research Institute (NGRI)
- Выпуск: Том 55, № 6 (2019)
- Страницы: 879-885
- Раздел: Article
- URL: https://journals.rcsi.science/1069-3513/article/view/225099
- DOI: https://doi.org/10.1134/S1069351319060090
- ID: 225099
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Аннотация
Abstract—The growth rate and size of microcracks formed in the surface layer of basalt and tonalite (granodiorite) at friction are studied using luminescence. It is found that upon breaking of crystal lattices of labradorite and quartz contained in these rocks, triboluminescence signals arise. Each signal corresponds to an embryo microcrack whose surface contains electronically excited free radicals ≡Si–O–, Fe3+ ions, and electron traps. The average growth rate of embryo microcracks in basalt varies from ~0.6 to ~1 km/s and in tonalite, from ~ 0.7 to ~1.3 km/s. The sizes of embryo microcracks in basalt range within ~3 to ~5.5 μm and in tonalite from ~3.5 to ~6.5 μm.
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Об авторах
V. Vettegren
Schmidt Institute of Physics of the Earth, Russian Academy of Sciences; Ioffe Physical Technical Institute, Russian Academy of Sciences
Email: avp@ifz.ru
Россия, Moscow, 123242; St. Petersburg, 194021
A. Ponomarev
Schmidt Institute of Physics of the Earth, Russian Academy of Sciences
Автор, ответственный за переписку.
Email: avp@ifz.ru
Россия, Moscow, 123242
R. Mamalimov
Schmidt Institute of Physics of the Earth, Russian Academy of Sciences; Ioffe Physical Technical Institute, Russian Academy of Sciences
Email: avp@ifz.ru
Россия, Moscow, 123242; St. Petersburg, 194021
I. Shcherbakov
Schmidt Institute of Physics of the Earth, Russian Academy of Sciences
Email: avp@ifz.ru
Россия, Moscow, 123242
K. Arora
CSIR: National Geophysical Research Institute (NGRI)
Email: avp@ifz.ru
Индия, Hyderabad-500007, Telangana
D. Srinagesh
CSIR: National Geophysical Research Institute (NGRI)
Email: avp@ifz.ru
Индия, Hyderabad-500007, Telangana
R. Chadha
CSIR: National Geophysical Research Institute (NGRI)
Email: avp@ifz.ru
Индия, Hyderabad-500007, Telangana