Exhumation history of eclogites from the Tso-Morari Crystalline Complex inEastern Ladakh: Mineralogical fluid inclusion constraints

Citation
Hk. Sachan et al., Exhumation history of eclogites from the Tso-Morari Crystalline Complex inEastern Ladakh: Mineralogical fluid inclusion constraints, J GEOL S IN, 53(2), 1999, pp. 181-190
Citations number
44
Categorie Soggetti
Earth Sciences
Journal title
JOURNAL OF THE GEOLOGICAL SOCIETY OF INDIA
ISSN journal
00167622 → ACNP
Volume
53
Issue
2
Year of publication
1999
Pages
181 - 190
Database
ISI
SICI code
0016-7622(199902)53:2<181:EHOEFT>2.0.ZU;2-W
Abstract
Eclogites from the Tso-Morari Crystalline Complex in Ladakh, India, preserv e evidence for high P, low T metamorphism of subducted Indian continental c rust in the presence of a moderate salinity aqueous fluid phase. The phengi te barometry estimates a pressure range of 11-14 kbar for eclogitization wh ereas garnet-omphacite geothermometry reveals a temperature range of 530 de grees-580 degrees C. Following eclogitization at 530 degrees-580 degrees C at a minimum pressure of 14 kbar, the eclogites were tectonically exhumed a long a nearly isothermal P-T path that brought them to within 10-30 kilomet ers of the surface. Final transport to the surface followed a more normal c ontinental geotherm.