Miocene to present kinematics of fault-bend folding across the Huerguosi anticline, northern Tianshan (China), derived from structural, seismic, and magnetostratigraphic data

Julien Charreau; Jean-Philippe Avouac; Yan Chen; Stéphane Dominguez; Stuart Gilder

doi:10.1130/G25073A.1

Journal articles

Miocene to present kinematics of fault-bend folding across the Huerguosi anticline, northern Tianshan (China), derived from structural, seismic, and magnetostratigraphic data

Julien Charreau ¹ Jean-Philippe Avouac ² Yan Chen ¹ Stéphane Dominguez ³ Stuart Gilder ⁴

1 ISTO - Institut des Sciences de la Terre d'Orléans

2 Division of Geological and Planetary Sciences [Pasadena]

3 Géosciences Montpellier

4 IPGP - Institut de Physique du Globe de Paris

Abstract : We combine surface structural measurements, subsurface seismic imaging, and magneto-stratigraphic dating to retrieve, through geometric modeling, the detailed history of fold growth and sedimentation across the Huerguosi anticline, on the northern Tianshan piedmont, taking advantage of a beautifully exposed section of growth strata. The model assumes a fault-bend folding mechanism, consistent with subsurface fold geometry. The shortening history is obtained by least-squares fitting of the measured dip angles of the growth strata. The shortening rate across the anticline is shown to have been remarkably constant: it increased only slightly from 0.84 ± 0.04 mm/yr between 10 and 4 Ma to 1.14 ± 0.02 mm/yr over the past 4 m.y. This approach also allows correcting syntectonic sedimentation rates for the effect of the fold growth and shows that the sedimentation rates in the piggyback basin increased abruptly from ~0.4 to ~0.7 mm/yr ca. 4 Ma.

Document type :

Journal articles

Domain :

Sciences of the Universe [physics] / Earth Sciences / Tectonics

Environmental Sciences / Global Changes

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https://hal-insu.archives-ouvertes.fr/insu-00338254
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Submitted on : Wednesday, November 12, 2008 - 2:17:29 PM
Last modification on : Tuesday, November 16, 2021 - 5:02:47 AM

Miocene to present kinematics of fault-bend folding across the Huerguosi anticline, northern Tianshan (China), derived from structural, seismic, and magnetostratigraphic data

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Miocene to present kinematics of fault-bend folding across the Huerguosi anticline, northern Tianshan (China), derived from structural, seismic, and magnetostratigraphic data

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