We examined the pressure–temperature paths and timing of eclogites and metamorphic rocks from two serpentine mélanges located about 200 km apart in the Zavkhan Belt, Mongolia. Despite their protoliths differing significantly in age and origin, both units record the same high-pressure metamorphic event around 520 Ma, indicating they belong to a large mélange belt. This implies that subduction-zone serpentinite mélanges incorporated diverse rocks, transported them to great depths, and underwent metamorphism during continental collision.
Manzshir Bayarbold, Atsushi Okamoto, Noriyoshi Tsuchiya, Otgonbayar Dandar, Shreya Mukherjee, Dhanya Gelli, Geri Agroli, Mayuko Fukuyama, Jamba Byamba. (2026) Subduction-induced high-pressure collision metamorphism: Evidence from Early Cambrian eclogites in the HP Hutul Mélange, Zavkhan Terrane, Western Mongolia. Gondwana Research, 155, 176-195.
https://doi.org/10.1016/j.gr.2026.02.002