First report of eclogites from the Himalayan belt, Kaghan valley (northern Pakistan)
Pognante, Ugo; Spencer, David A.
European Journal of Mineralogy Volume 3 Number 3 (1991), p. 613 - 618
published: Jun 14, 1991
manuscript accepted: Jan 23, 1991
manuscript received: Nov 20, 1990
ArtNo. ESP147050303013, Price: 29.00 €
Abstract Eclogites characterized by the omphacite - garnet - quartz - rutile ± phengite assemblage are reported for the first time in the Himalayan belt. They occur in the High Himalayan Crystallines (HHC) and Tethyan metamorphic units of northern Pakistan. The eclogites formed at T ≈ 650 ± 50°C and P ≈13 - 18 kbar, and represent the deepest rocks derived from the Indian plate known so far. They show an incipient decompressional re-equilibration which probably occurred at decreasing temperatures, in contrast with the exhumation path at constant or increasing temperatures of the HHC in India and Nepal.