Geophysical research: article

V. Vettegren1,2
A. Ponomarev1
V. Kulik2
R. Mamalimov1,2
I. Shcherbakov2
1 Schmidt Institute of Physics of the Earth, Russian Academy of Sciences
2 Ioffe Institute, Russian Academy of Sciences
Journal: Geophysical research
Tome: 21
Number: 4
Year: 2020
Pages: 35-50
UDK: 539.4
DOI: 10.21455/gr2020.4-3
Full text
Keywords: friction, destruction, quartz, low albite, nanocracks
Аnnotation: Using methods of fractoluminescence (with resolution of 2 ns), photoluminescence and Raman spectroscopy, information was obtained on the structure and evolution of defects formed on the surface of nanocracks in low albite and quartz crystals in friction of leucocratic quartz diorite. Before friction, the rock contained 60-70 % of low albite and 15-20 % of quartz with crystal sizes from ≈100 to 800 μm. After friction for about 1 ms, the crystal sizes decreased to 1-3 μm. The concentration of quartz crystals decreased by an order, and of low albite by ≈3 times. In quartz and low albite crystals remaining after destruction, the concentration of defects of Fe