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Formation of decollement upwarps during thrusting
Author(s) -
Dubey Ashok Kumar
Publication year - 2004
Publication title -
terra nova
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.353
H-Index - 89
eISSN - 1365-3121
pISSN - 0954-4879
DOI - 10.1111/j.1365-3121.2004.00534.x
Subject(s) - décollement , geology , thrust , kinematics , basement , thickening , petrology , geodesy , geometry , seismology , tectonics , aerospace engineering , physics , geography , materials science , mathematics , archaeology , classical mechanics , polymer science , engineering
Geometric and kinematic models reveal that rotation of layers during thrusting or development of drag folds produced by movement along listric thrust faults results in the formation of dilation space at the junction of the thrust ramp with the basal decollement. This is accompanied by upwarping of the basement to occupy the available space thereby producing an antiformal structure, which restricts the thrust displacement. The structure is termed a decollement upwarp and examples are cited from the foothill belt of the Himalaya.