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Tectono‐metamorphic evolution of the Karakorum Metamorphic complex (Dassu–Askole area, NE Pakistan): exhumation of mid‐crustal H T –M P gneisses in a convergent context by Y. Rolland; G. Mahéo; S. Guillot; A. Pecher is a Earth and Planetary Sciences article available to read on EtoBox.

What is Tectono‐metamorphic evolution of the Karakorum Metamorphic complex (Dassu–Askole area, NE Pakistan): exhumation of mid‐crustal H T –M P gneisses in a convergent context about?

## Abstract The South Karakorum margin, east of the Himalayan syntaxis, consist of an E–W elongated zone of young (10–3 Ma) high‐grade metamorphic rocks (M2) and related migmatitic domes. This late tectono‐metamorphic event post‐dates the Palaeogene (55–37 Ma) phase of thickening of the belt featured by NW–SE structures and associated M1 amphibolite facies metamorphism (0.7 GPa, 700 °C). This M2 metamorphism is characterised by low‐pressure, high‐temperature conditions coeval with migmatite formation in response to a thermal increase of __c__. 150 °C compared to M1, culminating at a temperature of __c__. 770 °C and a pressure of 0.5–0.6 GPa. Rapid exhumation of migmatitic domes, at a rate of 5 mm yr^−1^, was accommodated by vertical extrusion, in the core of E–W crustal‐scale folds. These crustal‐scale folds formed in response to N–S syn‐collisional shortening and were enhanced by thermal weakening of the migmatised continental crust. M2 metamorphism is spatially and temporarily associated with granitoids showing a mantle affinity, firmly suggesting that this could be the advective heat source for the granite and syenite generation and the subsequent migmatisation of the mid‐crusta

Who reads Tectono‐metamorphic evolution of the Karakorum Metamorphic complex (Dassu–Askole area, NE Pakistan): exhumation of mid‐crustal H T –M P gneisses in a convergent context?

Author

Y. Rolland; G. Mahéo; S. Guillot; A. Pecher

Publisher

John Wiley and Sons; Wiley (Blackwell Publishing); Blackwell Publishing Inc.; Wiley; University of California Press (ISSN 0263-4929)

Published

2001

Language

EN

Field

Earth and Planetary Sciences (Physical Sciences)