First report of composite pseudotachylyte-ultracataclasite veins at the Main Central Thrust (central Nepal): formation conditions, fabrics, and fabric forming process

Published: 23 March 2022| Version 1 | DOI: 10.17632/8tygkfnrr5.1
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Description

Research on the internal fabric of the pseudotachylyte has been less. No reports of the pseudotachylyte and ultracataclasite composite veins from the thrust sheet, Nepal Himalaya. The presence of pseudotachylyte-ultracataclasite vein at the vicinity of the MCT reveals repeated processes of fragmentation, fluidization, injection, flow, and solidification. Pseudotachylyte-ultracataclasite formed at high pressure low temperature probably during the Late Miocene to Early Pliocene, younger than 7.5 Ma

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Analyzed with the help of electron Microscopy. The frequency distribution of fragments was quantified by fractal geometry methods. Particle sizes and distribution were determined with the help of the open-source program Image J.

Categories

Geochemistry, Petrology, Tectonics, Electron Microscopy, Optical Petrography, Fractal Dimension Model

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