Numerical modelling of the thermal history of the NW Himalayas, Kullu Valley, India

Autor(en)

Bernhard Grasemann

Abstrakt

This paper demonstrates two-dimensional time-dependent finite-difference modelling of Himalayan metamorphism illustrated by the Kullu-S Lahul area (Himachal Pradesh) after the collision between India and Asia and the over-thrusting of the Higher Himalayas over the Lesser Himalayas. A two-dimensional solution demonstrates that during thrust sheet emplacement at geologically realistic strain rates of several centimetres a year, a temperature inversion does not occur. Therefore the variability of two other model parameters were explicitly considerred. 1) There is a significant conductivity contrast between the different types of rocks. 2) Rocks in the Higher Himalayas record a phase of metamorphism that preceded the movements on the Main Central Thrust. This observation emphasizes that there were considerable horizontal temperature variations across the whole region. -from Author

Organisation(en)

Institut für Geologie

Seiten

475-484

Anzahl der Seiten

10

Publikationsdatum

01-1993

Peer-reviewed

Ja

ÖFOS 2012

105106 Geodynamik

ASJC Scopus Sachgebiete

Environmental Science(all), Earth and Planetary Sciences(all)

Link zum Portal

https://ucris.univie.ac.at/portal/de/publications/numerical-modelling-of-the-thermal-history-of-the-nw-himalayas-kullu-valley-india(e21c8fc8-7f3f-47c4-b720-c7f991e29fbe).html