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Temporal changes in rock uplift rates of folds in the foreland of the Tian Shan and the Pamir from geodetic and geologic data
Author(s) -
Bufe Aaron,
Bekaert David P. S.,
Hussain Ekbal,
Bookhagen Bodo,
Burbank Douglas W.,
Thompson Jobe Jessica A.,
Chen Jie,
Li Tao,
Liu Langtao,
Gan Weijun
Publication year - 2017
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1002/2017gl073627
Subject(s) - geology , quaternary , geodetic datum , tectonics , interferometric synthetic aperture radar , foreland basin , series (stratigraphy) , seismology , tectonic uplift , geodesy , fault (geology) , synthetic aperture radar , paleontology , remote sensing
Understanding the evolution of continental deformation zones relies on quantifying spatial and temporal changes in deformation rates of tectonic structures. Along the eastern boundary of the Pamir‐Tian Shan collision zone, we constrain secular variations of rock uplift rates for a series of five Quaternary detachment‐ and fault‐related folds from their initiation to the modern day. When combined with GPS data, decomposition of interferometric synthetic aperture radar time series constrains the spatial pattern of surface and rock uplift on the folds deforming at decadal rates of 1–5 mm/yr. These data confirm the previously proposed basinward propagation of structures during the Quaternary. By fitting our geodetic rates and previously published geologic uplift rates with piecewise linear functions, we find that gradual rate changes over >100 kyr can explain the interferometric synthetic aperture radar observations where changes in average uplift rates are greater than ~1 mm/yr among different time intervals (~10 1 , 10 4–5 , and 10 5–6 years).