From buckling to asymmetric folding of the continental lithosphere: numerical modelling and application to the Himalayan syntaxes

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Serval ID
serval:BIB_583810A7E24C
Type
A part of a book
Collection
Publications
Title
From buckling to asymmetric folding of the continental lithosphere: numerical modelling and application to the Himalayan syntaxes
Title of the book
Tectonics of the Nanga Parbat Syntaxis and the Western Himalaya
Author(s)
Burg  J. P., Podladchikov Y.
ISBN
0305-8719
1-86239-061-4
Issued date
2000
Editor
Khan  M. A., Treloar  P. J., Searle  M. P., Jan  M. Q.
Volume
170
Series
Geological Society Special Publication
Genre
Book Section
Pages
219-236
Notes
Times Cited: 8
13th Himalaya, Karakoram, Tibet Workshop on Tectonics of the Nanga Parbat Syntaxis and the Western Himalaya
Apr 20-22, 1998
Univ peshawar, peshawar, pakistan
Burg, Jean-Pierre/A-7640-2008
Abstract
The eastern and western Himalayan syntaxes are large-scale, coeval antiforms developed late in the history of India-Asia collision. We use two-dimensional finite element models of lithospheric folding to develop a mechanically plausible structural interpretation. The models mimic the coeval development of adjacent synformal basins, analogous to the Peshawar and Kashmir basins on either side of and adjacent to the western syntaxis. Pureshear thickening and symmetric buckling accommodate shortening until, at a certain strain, an asymmetric thrust-like flow pattern occurs on a crustal to lithospheric scale. Similarities between geological data and calculated models suggest that lithospheric buckling is a basic response to large-scale continental shortening. To generalize these results, we suggest that a typical shortening history would include: (1) locking of an early thrust system in hinterland regions, followed by (2) pure shear shortening and symmetric buckling of the shortened lithosphere, and (3) loss of symmetry leading to the formation of an asymmetric fold in which a new thrust system will nucleate.
Create date
05/10/2015 6:45
Last modification date
20/08/2019 15:12
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