CSIR Central

Strain variation in fold-and-thrust belts: Implications for construction of retrodeformable models

IR@C-MMACS: CSIR-Centre for Mathematical Modelling and Computer Simulation, Bangalore


Field	Value

Title	Strain variation in fold-and-thrust belts: Implications for construction of retrodeformable models

Creator	Mukul, Malay

Subject	Geosciences

Description	Deformation in fold-and-thrust belts such as the Himalayas can be represented by the displacement vector field. The strain component of the displacement vector field across the fold-and-thrust belt varies from near zero in external thrust sheets to a significant part of the field in internal thrust sheets. In addition, strain exhibits three-dimensional patterns in parts of internal sheets, near fault zones, and in the overturned limbs of fault-related folds due to superposition of penetrative-strain producing deformation events. This paper examines superposition of these strain producing deformation events in some detail and points out situations in fold-and-thrust belts wherein the finite strain becomes three-dimensional. This suggests that the plane-strain assumption used in the construction of retro deformable models of fold-and-thrust belt evolution breaks down in these situations and the models lose their validity. Therefore, current techniques used for construction of retro deformable models in fold-and-thrust belts need to be modified and three-dimensional models which include three-dimensional finite and incremental strain data need to be constructed for an accurate study of the evolution of geometry and kinematics in fold-and-thrust belts.

Publisher	http://www.springerlink.com

Date	1999-09

Type	Article PeerReviewed

Format	application/pdf

Identifier	http://cir.cmmacs.ernet.in/287/1/Mukul1999JESS.pdf Mukul, Malay (1999) Strain variation in fold-and-thrust belts: Implications for construction of retrodeformable models. Journal of Earth System Science, 108 (3). pp. 207-221.

Relation	http://cir.cmmacs.ernet.in/287/