Interplay of fragmentation, flow, mingling, and mixing in composite pseudotachylyte-ultracataclasite veins – an example from the Main Central Thrust (central Nepal)

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