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- Title
Study of nanocrystals in the dynamic slip zone.
- Authors
Sobolev, G.; Kireenkova, S.; Morozov, Yu.; Smul'skaya, A.; Vettegren, V.; Kulik, V.; Mamalimov, R.
- Abstract
Mineral composition is studied and a search to detect nanocrystals is conducted in the surface layers of slickensides formed due to dynamic slip in arkose sandstone. The infrared and Raman spectroscopy show that the slickensided layer is composed of nanocrystals of montmorillonite and anatase measuring ≈15 nm and 3 nm, respectively. The crystalline lattice of the nanocrystals of montmorillonite is stretched by ≈2.5% while the lattice of the nanocrystals of anatase is compressed by ≈0.12%. Deeper than 3 mm below the slickenside surface, the sandstone contains nanocrystals of montmorillonite, beidellite and nontronite, quartz, plagioclase, and anatase. The nanocrystals of anatase have a linear size of ≈8 nm. Their crystalline lattice is compressed by ≈0.03%. It is supposed that montmorillonite in the slickensides was formed due to hydrolytic decomposition of silicates under friction of the fault planes sliding past each other.
- Subjects
NANOCRYSTALS; SLIP ratio (Fluid dynamics); MINERALS; RAMAN spectroscopy; CHEMICAL decomposition; HYDROLYSIS; MONTMORILLONITE
- Publication
Izvestiya, Physics of the Solid Earth, 2012, Vol 48, Issue 9/10, p684
- ISSN
1069-3513
- Publication type
Article
- DOI
10.1134/S1069351312090030