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Development Characteristics and Formation Mechanism of Nanoparticles in the Ductile Shear Zone of the Red River Fault

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Nanoparticles in the ductile shear zones of faults are thought to be closely related to fault activity and the seismogenic mechanism. Using scanning electron microscopy (SEM), nanoparticles with a variety of morphological characteristics were found in mylonite, gneiss, and schist from the ductile shear zones of the Red River Fault. The nanoparticle morphology is dominated by rods, spherulites, massive forms, lamellae and film-like shapes. Energy spectrum analysis showed that the nanoparticles were mainly composed of silicate minerals, while a few contained carbonate minerals. Nanoparticles follow certain spatial distribution rules in ductile shear zones. Near the main fault plane of the Red River Fault Zone, the nanoparticles are dispersed, brittle and spherulitic, with a small particle diameter. Those far from the main fault plane are agglomerated and plastic, with rod-like, massive, lamellar and film-like shapes, and a relatively large particle diameter. According to nanoparticle development characteristics and the theory of microscopic deformation, a study on the formation mechanism of nanoparticles in the ductile shear zones of the Red River Fault was carried out. The rock minerals are the first to experience granulation, through intergranular movement under strong strain, generating brittle spherulitic particles, which eventually loosen and disperse. In the later stages, through recrystallization, nanoparticle crystals may become large or develop various morphologies.
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Keywords: Development Characteristics; Ductile Shear Zone; Formation Mechanism; Nanoparticle; Red River Fault

Document Type: Research Article

Affiliations: 1: School of Marine Sciences, Sun Yat-Sen University, Guangzhou 510006, China 2: Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China 3: Key Laboratory of Marginal Sea Geology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China

Publication date: September 1, 2017

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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