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Title: Thermal evolution of the mid-crust from the Himalayan orogen
Author: Chambers, Jennifer Ann
Awarding Body: Open University
Current Institution: Open University
Date of Award: 2008
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The Haimanta Group, at the top of the exhumed mid-crust in the western Himalaya (Sutlej valley), underwent prograde metamorphism to depths of 25 to 30 km at c. 30 Ma. Initial exhumation of the Haimanta Group was accompanied by further heating, from 610-620 °C up to 660 °C at c. 23 Ma; further exhumation (at c. 1.3 mm/yr) to a depth of c. 7 km during the Early Miocene resulted in cooling to 300-350 ⁰C. Meanwhile, the underlying Greater Himalayan Sequence (GHS) was rapidly exhumed due to coeval extension on the South Tibetan Detachment above and compression on the Main Central Thrust below. The Jutogh Group, with Palaeoproterozoic (c. 1810 Ma) leucogranites characteristic of the Lesser Himalayan Sequence, was buried and metamorphosed beneath the overthrust GHS, and involved the partial recrystallisation of uraninite in leucogranite at 11 Ma.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available